Horse Game 16

[REDACTED: private project content]

Command did not complete within its 120s timeout and was moved to the background (ID: bho3shs2g). Output is being written to: C:\Users\adn\AppData\Local\Temp\claude\E--a327ex\001401a9-94a8-4f9e-b94e-e9334af59fca\tasks\bho3shs2g.output. You will be notified when it completes. To check interim output, use Read on that file path.

be-me/
cratebox/
cute_action.mp3
cute_action.wav
data/
edition-template/
emoji-aimer/
emoji-ball-battles/
emoji-ball-battles-generated/
emoji-ball-bounce/
emoji-template/
generation-loss/
it-follows/
lane-battle/
ld54-remake/
meal_prep.md
mini-looper/
mini-looper-old/
music-theory/
neural-networms/
notes/
petri/
private/
radio-token.txt
ref1.png
ref2.png
reference/
ricochet-template/
sakurai/
scratch_addr.txt
... [10 more lines]

1    /e/a327ex/a327ex-site/logs/3d-exploration-robots.md
2   /e/a327ex/a327ex-site/logs/horse-game-12.md
3   /e/a327ex/a327ex-site/logs/horse-game-13.md
4   /e/a327ex/a327ex-site/logs/horse-game-14.md
5   /e/a327ex/a327ex-site/logs/horse-game-15.md
6   /e/a327ex/a327ex-site/logs/mini-looper-ideaguying.md
7   /e/a327ex/a327ex-site/logs/sound-effect-lab-bulk-download.md
8   /e/a327ex/a327ex-site/renderer/data/3d-exploration-robots.lua
9   /e/a327ex/a327ex-site/renderer/data/horse-game-12.lua
10  /e/a327ex/a327ex-site/renderer/data/horse-game-13.lua
11  /e/a327ex/a327ex-site/renderer/data/horse-game-14.lua
12  /e/a327ex/a327ex-site/renderer/data/horse-game-15.lua
13  /e/a327ex/a327ex-site/renderer/data/mini-looper-ideaguying.lua
14  /e/a327ex/a327ex-site/renderer/data/sound-effect-lab-bulk-download.lua
15  /e/a327ex/ABAgames/knightvspawns/endgame_design.md
16  /e/a327ex/ABAgames/knightvspawns/fx_lab.lua
17  /e/a327ex/ABAgames/knightvspawns/items.lua
18  /e/a327ex/ABAgames/knightvspawns/items_catalog.md
19  /e/a327ex/ABAgames/knightvspawns/main.lua
20  /e/a327ex/ABAgames/one-button-games.md
21  

anchor/
anchor.exe*
annotate.lua
assets/
audit/
avcodec-61.dll*
avfilter-10.dll*
avformat-61.dll*
avutil-59.dll*
cuts.txt
cuts_auto.txt
cuts_intro.txt
cuts_new.txt
dist/
edit.lua
emoji/
endgame_design.md
fx_done.lua
fx_lab.lua
fxsmoke.lua
glossary.lua
infrastructure.md
items.lua
items_catalog.md
items_plan.md
lang_ja.lua
lang_pt.lua
lang_ru.lua
main.lua
main.lua.fxbak
... [16 more lines]

/e/a327ex/ABAgames/knightvspawns/items.lua:194:-- audio itself. The shove is the one: a Locomotive chain or a Subwoofer ring
/e/a327ex/ABAgames/knightvspawns/items.lua:926:  -- Subwoofer, Eight Ball, Locomotive, Goal Net, Curling Stone and the five
/e/a327ex/ABAgames/knightvspawns/items.lua:1010:  item_def{ id = 'locomotive', name = 'Locomotive', weight = 2, img = locomotive_img,
/e/a327ex/ABAgames/knightvspawns/items.lua:1026:  -- (Eight Ball slams, Locomotive transfers), at skulls (Coffin trades), at
/e/a327ex/ABAgames/knightvspawns/main.lua:576:  'banana_peel', 'coffin', 'eight_ball', 'locomotive', -- the stops
/e/a327ex/ABAgames/knightvspawns/main.lua:668:locomotive_img       = image_load('locomotive',           'assets/locomotive.png')           -- Locomotive icon (the stop transfers onward)
/e/a327ex/ABAgames/knightvspawns/main.lua:4592:-- Cascade guard: Locomotive transfers a Push to whatever stopped it, and with
/e/a327ex/ABAgames/knightvspawns/main.lua:4669:    -- on a skull it never hit, no Eight Ball slam and no Locomotive transfer.
/e/a327ex/ABAgames/knightvspawns/main.lua:4904:-- damage and Locomotive's transfer both land at the turnaround, not the launch.
/e/a327ex/ABAgames/knightvspawns/main.lua:4971:--   pawn      — Eight Ball / Locomotive when they land (phase B). Base: stopped.
/e/a327ex/ABAgames/knightvspawns/main.lua:5012:    -- so the blocker's health drained and Locomotive's transfer shot away while
/e/a327ex/ABAgames/knightvspawns/main.lua:5026:      -- 🚂 Locomotive: Newton's cradle. The stop transfers onward, same
/e/a327ex/ABAgames/knightvspawns/main.lua:5028:      if not blocker._gone and owned_set['locomotive'] then
/e/a327ex/ABAgames/knightvspawns/main.lua:5029:        push_and_resolve(blocker, dx, dy, 'locomotive', contact)
/e/a327ex/ABAgames/knightvspawns/main.lua:5139:-- Locomotive chain pushes several times inside a single one. Eight pawns
/e/a327ex/ABAgames/knightvspawns/main.lua:5164:    -- played Glove's moment on EVERY push, so a Locomotive chain or a Subwoofer
/e/a327ex/ABAgames/knightvspawns/fx_lab.lua:311:    -- Brick, Dizzy, Eight Ball, Locomotive, Banana Peel, Coffin, Muscle, Iron
/e/a327ex/ABAgames/knightvspawns/fx_lab.lua:348:      -- pawn — the one stop kind Eight Ball and Locomotive key on
/e/a327ex/ABAgames/knightvspawns/fx_lab.lua:731:  locomotive     = { t = 'push', mode = 'body', note = "Newton's cradle: the stop transfers onward" },
/e/a327ex/ABAgames/knightvspawns/items_catalog.md:652:**Power-watch:** 🥌 Curling Stone + 🚂 Locomotive + 🦾 Iron Arm turns one
/e/a327ex/ABAgames/knightvspawns/items_catalog.md:696:- 🚂 **Locomotive** [Force] — "When a Push is stopped by a pawn, that pawn
/e/a327ex/ABAgames/knightvspawns/items_catalog.md:715:  bodies — Eight Ball slams, Locomotive transfers — at skulls — Coffin
/e/a327ex/ABAgames/knightvspawns/items_catalog.md:1080:14. **Eight Ball + Locomotive** (`[f]`): both key on a stopped Push — do both
/e/a327ex/ABAgames/knightvspawns/items_catalog.md:1083:15. **Curling Stone + Locomotive** (`[f]`): with both owned every transferred

4570         best = p
4571          end
4572        end
4573      end
4574      return best or claimed
4575    end
4576    
4577    -- "The lowest pawn" — the catalog's most-used targeting phrase. The tie-break IS
4578    -- the keyword's: furthest down, then leftmost. Enemies only, and never a drop (a
4579    -- drop is not a pawn).
4580    function lowest_pawn()
4581      return best_target(function(p) return not p.friendly and not p.item end)
4582    end
4583    
4584    -- Distance in squares: 1, plus the Push stat ladder (Muscle +1 / Iron Arm +2).
4585    -- 🥌 CURLING STONE turns the ladder off entirely — a Pushed pawn slides until
4586    -- something stops it, so the board's own geometry becomes the whole item.
4587    function push_distance()
4588      if items_enabled and owned_set['curling_stone'] then return BOARD_SIZE end
4589      return 1 + (stats.push or 0)
4590    end
4591    
4592    -- Cascade guard: Locomotive transfers a Push to whatever stopped it, and with
4593    -- Curling Stone every transfer slides too (ruling 15 — blessed, it is three
4594    -- specific items plus the ladder). Direction never changes and the board is
4595    -- finite, so it always terminates; this is a belt-and-braces cap, not a rule.
4596    PUSH_MAX_CHAIN = 16
4597    push_depth = 0
4598    DIZZY_STUN = 2   -- 😵 Dizzy's beats (owner-set); base STUN_BEATS stays 1
4599    
... [110 more lines]

4895   if delay and delay > 0 then timer_after(game_timer, delay, show) else show() end
4896      return (delay or 0) + dur
4897    end
4898    
4899    -- 🎱 REFUSED. A shove stopped by a PAWN is the one stop where something is
4900    -- standing there to say no, so the cue ball noses into it and is knocked back —
4901    -- the two-phase version of the lunge a stalled march does with bump(), which
4902    -- snaps to its offset instantly and only eases home. Here the approach is a
4903    -- tween too, because the CONTACT is an event other things hang off: Eight Ball's
4904    -- damage and Locomotive's transfer both land at the turnaround, not the launch.
4905    --   out  — quad_out, decelerating INTO what stops it
4906    --   back — slower, eased, it is being refused rather than bouncing
4907    -- `delay` waits for the pawn's own slide to finish first, so a shove that
4908    -- travelled two squares before hitting someone noses in at the END of the slide.
4909    --
4910    -- ⛔ THE EASE AND THE DURATION ARE THE EFFECT. This was cubic_in over 0.07s
4911    -- first, and it was INVISIBLE. 0.07s is four frames at 60fps and t³ puts them at
4912    -- 0.14px, 1.1px, 3.8px, 9px — three of the four sit at nothing and the recoil
4913    -- starts before the eye registers the fourth. bump() gets away with the same
4914    -- 0.16s because it SNAPS to its offset on frame one and eases home from there,
4915    -- so the displacement is on screen the whole time. An approach that is tweened
4916    -- has to be long enough to be seen travelling and eased so it does not
4917    -- back-load: front-loaded and ~8 frames is the floor for a gesture this small.
4918    -- ⚠ A FRACTION OF A SQUARE, not a pixel count — the target is the NEXT CELL, so
4919    -- the reach has to be stated against the grid. 0.55 is exactly edge-to-edge:
4920    -- the chess_pawn sprite is 61% ink and 39% transparent margin, so drawn at
4921    -- PAWN_PX 22 the visible pawn is 13.5px inside a 30px cell, leaving 16.5px of
4922    -- air between neighbours — not the ~8px the draw size implies. 0.60 presses a
4923    -- couple of pixels PAST touching, which is what makes it read as pressure
4924    -- rather than as stopping short. (It was a flat 11px, 5.5px shy of contact.)
... [160 more lines]

2827-  cloud            = nil
2828-  cat              = nil    -- 🐈 Force summon
2829-  tornado          = nil    -- 🌪️ Force summon (8 beats, then it blows out)
2830:  push_depth       = 0
2831-  comet_mark       = nil
2832-  coins            = {}
2833-  skulls           = {}
--
2945-  comet_mark = nil
2946-  cloud, wall = nil, nil
2947-  cat, tornado = nil, nil        -- the tornado is temporary; the cat re-summons below
2948:  push_depth = 0
2949-  march_freeze, freeze_held, freeze_flavor = 0, false, 'ice'
2950-  revived_this_beat, angel_hold = false, false
2951-  strike_buffered = false
--
4594--- specific items plus the ladder). Direction never changes and the board is
4595--- finite, so it always terminates; this is a belt-and-braces cap, not a rule.
4596-PUSH_MAX_CHAIN = 16
4597:push_depth = 0
4598-DIZZY_STUN = 2   -- 😵 Dizzy's beats (owner-set); base STUN_BEATS stays 1
4599-
4600--- The unit direction from one cell to another. A knight's L is (±1,±2) or
--
5152-
5153--- The one call every Force applier makes: shove, resolve what it hit, then the
5154--- riders. Returns the stop kind.
5155:function push_and_resolve(p, dx, dy, src, show_delay)
5156:  if push_depth >= PUSH_MAX_CHAIN then return end
5157:  push_depth = push_depth + 1
... [11 more lines]

5130       timer_after(game_timer, arrive, function() p.stun_hidden = nil end)
5131        end
5132      end
5133    end
5134    
5135    -- 🔊 THE SHOVE'S SOUND — ONE PER EVENT, however many pawns moved.
5136    -- It is authored as GLOVE's item_fx moment in the F7 lab (`glove = { 'push' }`),
5137    -- because that is where the owner dropped it, but it belongs to the SHOVE rather
5138    -- than to Glove: Subwoofer, Wave and the Chequered Flag all push, and a
5139    -- Locomotive chain pushes several times inside a single one. Eight pawns
5140    -- displaced by one blast is one event to the ear.
5141    --
5142    -- ⚠ The gate is a flag cleared at each EVENT boundary — a knight commit and a
5143    -- march beat — rather than a timer, so it can never drift against the sim or
5144    -- behave differently on a replay. Nothing here is sim state; it only gates audio.
5145    push_sfx_done   = false
5146    push_shake_done = false   -- ...and the camera, gated the same way (push_slide_vfx)
5147    function push_sound_once()
5148      if push_sfx_done then return end
5149      push_sfx_done = true
5150      sound_item_fx_play('glove')
5151    end
5152    
5153    -- The one call every Force applier makes: shove, resolve what it hit, then the
5154    -- riders. Returns the stop kind.
5155    function push_and_resolve(p, dx, dy, src, show_delay)
5156      if push_depth >= PUSH_MAX_CHAIN then return end
5157      push_depth = push_depth + 1
5158      local stop, moved, arrive = push_pawn(p, dx, dy, src, show_delay)
5159      if moved ~= nil then
... [20 more lines]

Locomotive handles chains of pushed pawns through recursive calls to push_and_resolve, which bottoms out at a recursion depth limit of 16. When a pawn gets pushed, it slides until it hits a blocker, then push_resolve is called on that blocker to continue the chain. I'm checking whether the ordering of these recursive pushes could cause issues. So the Newton's cradle effect is actually working as intended — only the final ball in the chain moves because each blocker is evaluated against the live board state before subsequent pushes happen. The recursive structure with the depth guard of 16 does handle chains properly, though I should verify there aren't any edge cases with the depth limit or other potential bugs in the implementation.

Looking at the mechanics: the depth guard prevents infinite recursion, the push effects fire correctly per push so damage accumulates as intended, and the direction never changes while the board is finite, so termination is guaranteed. The contact delay accumulation also looks correct — each transfer in the chain properly inherits and builds on the previous delay, so timing compounds correctly through the sequence.

But I'm spotting a potential issue with how push_pawn returns and how push_and_resolve validates the result — need to trace through the stop == 'pawn' case more carefully to see if there's a timing or state bug lurking there.

Actually, let me refocus on what the user is asking: whether Locomotive works recursively and what the test lab should verify.…

280        -- visibly flips off; otherwise keep one drop out and hit chaff
281       local d
282       for _, p in ipairs(pawns) do if p.item then d = p end end
283       if d and FXLAB.cyc % 3 == 0 then
284         fx_after(0.3, function() if pawn_at(d.gx, d.gy) == d then fx_commit(d.gx, d.gy) end end)
285         fx_after(1.6, fx_ungrant_strays)   -- the collected scenery def goes right back out
286         return
287       elseif not d then
288         local def = fx_any_def()
289         if def then fx_drop(0, 1, def) end
290       end
291     end
292     fx_victim_commit(sc.target, 0.45, parity)
293     if sc.with_drop then fx_after(1.6, fx_ungrant_strays) end
294   end,
295 }
296 
297 -- every-Nth-capture procs (and chance procs): arm to N-1 / pre-pay the roll,
298 -- then one real capture fires it
299 -- the FORCE batch: strike a TANK (it must survive for the hit to be a Strike)
300 -- and watch where the shove ends. `mode` arranges the geometry so each stop
301 -- kind is reproducible: 'open' = clear board, 'edge' = the tank one square from
302 -- a side edge, 'skull' = a skull planted in the push's path. Placement derives
303 -- the push direction the same way the game does (sign of knight -> target), so
304 -- the scenario can never drift from `push_dir_from`.
305 FX_T.push = {
306   period = 2.4,
307   setup = function(sc)
308     fx_clear(); fx_knight(sc.mode == 'edge' and 6 or 3, 5)
309     -- ⚠ THE COMPANION IS NOT OPTIONAL. The lab grants ONLY the item under test,
... [90 more lines]

I see that `mode = 'body'` creates just one blocker pawn, so the locomotive scenario with its tank plus blocker setup only stages two pawns total. To properly test the recursive transfer behavior, I need a longer chain with multiple blockers so the transfer visibly recurses through them. Let me look at the context around line 731 and check the FX_SCENES table to find or create a suitable test case.…

700    thunderbolt    = { t = 'chain_cluster', spread = 3 },
701   golden_heart   = { t = 'pickup', predamage = 2 },
702   banner         = { t = 'stat_hit', banner_alt = true,
703                      note = 'alternates full life (lit, +2) / hurt (grey)' },
704   pillar         = { t = 'stat_hit', hp_max_set = 6 },
705   collection     = { t = 'stat_hit', fill_items = true },
706   package        = { t = 'stat_hit', with_drop = true,
707                      note = 'every 3rd cycle collects the drop — icon flips off' },
708   opal           = { t = 'stat_hit', parity_alt = true,
709                      note = 'alternates light target (+1) / dark target (base)' },
710   glove          = { t = 'push', mode = 'open',
711                      note = 'the Strike shoves the tank along the knight\'s own approach diagonal' },
712   muscle         = { t = 'push', mode = 'open',
713                      note = 'same shove, one square further — the Push ladder' },
714   banana_peel    = { t = 'push', mode = 'edge',
715                      note = 'shoved past the side edge: captured, whatever its health' },
716   coffin         = { t = 'push', mode = 'skull',
717                      note = 'shoved into a skull: both die, the skull costs nothing' },
718   iron_arm       = { t = 'push', mode = 'open', edge_alt = true,
719                      note = 'alternates open board (all three squares) / near the side (cut to two)' },
720   curling_stone  = { t = 'push', mode = 'open', note = 'slides until something stops it' },
721   brick          = { t = 'push', mode = 'open', note = 'flat 1 on the shoved pawn, once per Push' },
722   -- ⚠ Iron Arm is NOT optional here. Alone, Rocket pushes one square and deals
723   -- 1 — indistinguishable from Brick, which is the one thing the card is not.
724   -- With +2 Push the same strike travels three and kills the 3-health tank
725   -- outright, and the edge_alt cycle shows it cut to two. `with` grants it and
726   -- `keep` protects it from fx_ungrant_strays.
727   rocket         = { t = 'push', mode = 'open', edge_alt = true, with = { 'iron_arm' },
728                      note = '1 per SQUARE travelled: 3 on the open board (kills the tank), 2 near the edge' },
729   dizzy          = { t = 'push', mode = 'open', note = 'the shoved pawn wears 2 beats of Stun stars' },
... [40 more lines]

710:  glove          = { t = 'push', mode = 'open',
712:  muscle         = { t = 'push', mode = 'open',
714:  banana_peel    = { t = 'push', mode = 'edge',
716:  coffin         = { t = 'push', mode = 'skull',
718:  iron_arm       = { t = 'push', mode = 'open', edge_alt = true,
720:  curling_stone  = { t = 'push', mode = 'open', note = 'slides until something stops it' },
721:  brick          = { t = 'push', mode = 'open', note = 'flat 1 on the shoved pawn, once per Push' },
727:  rocket         = { t = 'push', mode = 'open', edge_alt = true, with = { 'iron_arm' },
729:  dizzy          = { t = 'push', mode = 'open', note = 'the shoved pawn wears 2 beats of Stun stars' },
730:  eight_ball     = { t = 'push', mode = 'body', note = 'the pawn IN THE WAY takes your damage' },
731:  locomotive     = { t = 'push', mode = 'body', note = "Newton's cradle: the stop transfers onward" },
750:  fencer         = { t = 'push', mode = 'open', with = { 'dagger' },

89:function fx_pawn(gx, gy, st)
234:      fx_pawn(gx, gy)
244:  local p = fx_pawn(tx, ty, st)
350:      if in_bounds(bx, by) and not pawn_at(bx, by) then fx_pawn(bx, by, { hp = 2 }) end
352:    local p = fx_pawn(tx, ty, { hp = 3 })         -- a tank: the hit must be a Strike
378:        local v = fx_pawn(tx, ty)
381:          if in_bounds(ax, ay) and not pawn_at(ax, ay) then fx_pawn(ax, ay) end
430:            if p.gy >= 2 and not pawn_at(p.gx, p.gy - 2) then fx_pawn(p.gx, p.gy - 2) end
450:      local v = fx_pawn(tx, ty)
481:        if in_bounds(ax, ay) and not pawn_at(ax, ay) then fx_pawn(ax, ay) end
517:      fx_pawn((FXLAB.cyc % 2 == 0) and 2 or 5, 3)
520:      fx_pawn(col, 6)
528:      if not pawn_at(2, 4) then fx_pawn(2, 4, { hp = 2 }) end
529:      if not pawn_at(5, 4) then fx_pawn(5, 4, { hp = 3 }) end
530:      fx_pawn(col, 6)
537:      fx_pawn(col, 6)
578:    fx_pawn(gx, 0, { emit = true })
603:    local v = fx_pawn(4, 3)                       -- the direct capture
605:      if not pawn_at(c[1], c[2]) then fx_pawn(c[1], c[2]) end
619:    fx_pawn(2, 4)                                  -- next march walks into the flame
--- def ---
78:function fx_clear()
89:function fx_pawn(gx, gy, st)
106:function fx_skull(gx, gy)
162:function fx_knight(gx, gy)
171:function fx_knight_near(gx, gy)

/e/a327ex/ABAgames/knightvspawns/verify/run_605.txt:2:expect score=75 items=comet,eight_ball,growing_heart,horn,locomotive,seedling,snow dur_ms=127206 hp=0 trunc=0 pre=
/e/a327ex/ABAgames/knightvspawns/verify/run_700.txt:2:expect score=145 items=abacus,balloon,banana_peel,brick,cat,chains,chequered_flag,cloud,coffee,coffin,coin,curling_stone,dizzy,eight_ball,glove,goal_net,guardian_angel,hole,iron_arm,locomotive,magnet,meat,muscle,opal,snow,steam,subwoofer,sword,tornado,turtle,wall,wave dur_ms=176405 hp=0 trunc=0 pre=glove,muscle,iron_arm,curling_stone,brick,dizzy,banana_peel,coffin,eight_ball,locomotive,subwoofer,goal_net,wave,chequered_flag,balloon,cat,tornado
/e/a327ex/ABAgames/knightvspawns/verify/run_701.txt:2:expect score=193 items=abacus,balloon,banana_peel,brick,cat,chequered_flag,coffin,curling_stone,dagger,dizzy,egg,eight_ball,glove,goal_net,iron_arm,link,locomotive,muscle,oni,pillar,seedling,shield,slot_machine,subwoofer,thunderbolt,tornado,turtle,wave dur_ms=196354 hp=0 trunc=0 pre=glove,muscle,iron_arm,curling_stone,brick,dizzy,banana_peel,coffin,eight_ball,locomotive,subwoofer,goal_net,wave,chequered_flag,balloon,cat,tornado
/e/a327ex/ABAgames/knightvspawns/verify/run_702.txt:2:expect score=130 items=balloon,banana_peel,boom,brick,broom,cat,chequered_flag,coffin,crown,curling_stone,dizzy,egg,eight_ball,glove,goal_net,guardian_angel,heart,helmet,iron_arm,link,locomotive,magnet,muscle,subwoofer,thunderbolt,tooth,tornado,wave dur_ms=161790 hp=0 trunc=0 pre=glove,muscle,iron_arm,curling_stone,brick,dizzy,banana_peel,coffin,eight_ball,locomotive,subwoofer,goal_net,wave,chequered_flag,balloon,cat,tornado
/e/a327ex/ABAgames/knightvspawns/verify/run_703.txt:2:expect score=273 items=balloon,banana_peel,brick,cat,chequered_flag,chick,cloud,coffee,coffin,comet,conductor,curling_stone,dizzy,egg,eight_ball,fire,glove,goal_net,hammer,heart,hole,hourglass,iron_arm,link,locomotive,magnet,muscle,snow,subwoofer,tornado,wall,wave,web dur_ms=238452 hp=1 trunc=1 pre=glove,muscle,iron_arm,curling_stone,brick,dizzy,banana_peel,coffin,eight_ball,locomotive,subwoofer,goal_net,wave,chequered_flag,balloon,cat,tornado
/e/a327ex/ABAgames/knightvspawns/verify/run_704.txt:2:expect score=132 items=balloon,banana_peel,banner,boom,brick,cat,chains,chequered_flag,coffin,curling_stone,dizzy,eight_ball,glove,goal_net,heart,horn,iron_arm,locomotive,magnet,muscle,snail,snow,steam,subwoofer,thread,tornado,wall,wave dur_ms=161808 hp=0 trunc=0 pre=glove,muscle,iron_arm,curling_stone,brick,dizzy,banana_peel,coffin,eight_ball,locomotive,subwoofer,goal_net,wave,chequered_flag,balloon,cat,tornado
/e/a327ex/ABAgames/knightvspawns/verify/run_705.txt:2:expect score=93 items=balloon,banana_peel,brick,cat,chains,chequered_flag,coffin,coin,curling_stone,dizzy,eight_ball,glove,goal_net,hammer,iron_arm,link,locomotive,magnet,muscle,snail,steam,subwoofer,thread,tornado,turtle,wave dur_ms=131741 hp=0 trunc=0 pre=glove,muscle,iron_arm,curling_stone,brick,dizzy,banana_peel,coffin,eight_ball,locomotive,subwoofer,goal_net,wave,chequered_flag,balloon,cat,tornado
/e/a327ex/ABAgames/knightvspawns/verify/run_750.txt:2:expect score=146 items=balloon,banana_peel,banner,brick,cat,chains,chequered_flag,clover,coffin,comet,curling_stone,dagger,dizzy,eight_ball,fire,glove,goal_net,iron_arm,link,locomotive,muscle,package,subwoofer,sword,tornado,turtle,wall,water_gun,wave dur_ms=165224 hp=0 trunc=0 pre=glove,muscle,iron_arm,curling_stone,brick,dizzy,banana_peel,coffin,eight_ball,locomotive,subwoofer,goal_net,wave,chequered_flag,balloon,cat,tornado
/e/a327ex/ABAgames/knightvspawns/verify/run_751.txt:2:expect score=48 items=balloon,banana_peel,brick,cat,chequered_flag,coffin,crown,curling_stone,dagger,dizzy,eight_ball,glove,goal_net,iron_arm,locomotive,meat,muscle,subwoofer,tooth,tornado,wave,web dur_ms=90828 hp=0 trunc=0 pre=glove,muscle,iron_arm,curling_stone,brick,dizzy,banana_peel,coffin,eight_ball,locomotive,subwoofer,goal_net,wave,chequered_flag,balloon,cat,tornado
/e/a327ex/ABAgames/knightvspawns/verify/run_752.txt:2:expect score=186 items=balloon,banana_peel,brick,broom,cat,chequered_flag,coffin,curling_stone,dizzy,egg,eight_ball,glove,goal_net,hammer,heart,helmet,iron_arm,lightning,link,locomotive,muscle,package,pillar,subwoofer,sword,tooth,tornado,turtle,wall,wave dur_ms=196597 hp=0 trunc=0 pre=glove,muscle,iron_arm,curling_stone,brick,dizzy,banana_peel,coffin,eight_ball,locomotive,subwoofer,goal_net,wave,chequered_flag,balloon,cat,tornado
/e/a327ex/ABAgames/knightvspawns/verify/run_753.txt:2:expect score=182 items=balloon,banana_peel,boom,brick,cat,chains,chequered_flag,cloud,coffee,coffin,coin,curling_stone,dagger,dizzy,egg,eight_ball,gi,glove,goal_net,heart,iron_arm,lightning,link,locomotive,magnet,muscle,package,shield,steam,subwoofer,sword,tornado,turtle,wave dur_ms=183211 hp=0 trunc=0 pre=glove,muscle,iron_arm,curling_stone,brick,dizzy,banana_peel,coffin,eight_ball,locomotive,subwoofer,goal_net,wave,chequered_flag,balloon,cat,tornado
/e/a327ex/ABAgames/knightvspawns/verify/run_771.txt:2:expect score=46 items=banner,chequered_flag,crown,locomotive,package dur_ms=99600 hp=0 trunc=0 pre=crown
/e/a327ex/ABAgames/knightvspawns/verify/run_791.txt:2:expect score=41 items=brick,broom,coffee,locomotive,snail dur_ms=91800 hp=0 trunc=0 pre=coffee
/e/a327ex/ABAgames/knightvspawns/verify/run_792.txt:2:expect score=275 items=brick,cat,cloud,coffee,crown,dagger,glove,golden_heart,heart,horn,hourglass,link,locomotive,muscle,opal,seedling,shield,snail,steam,subwoofer,thunderbolt,wave dur_ms=238067 hp=1 trunc=1 pre=coffee
/e/a327ex/ABAgames/knightvspawns/verify/run_796.txt:2:expect score=207 items=banner,brick,broom,chains,chequered_flag,cloud,coffee,comet,egg,eight_ball,fire,golden_heart,heart,lightning,locomotive,magnet,opal,seedling,snail,steam,trident,turtle,wall,wave dur_ms=204660 hp=0 trunc=0 pre=coffee,seedling
/e/a327ex/ABAgames/knightvspawns/verify/run_881.txt:2:expect score=164 items=cloud,coin,comet,dagger,dynamite,golden_heart,hourglass,ice_cube,locomotive,magnet,web dur_ms=173048 hp=0 trunc=0 pre=hourglass,coin
/e/a327ex/ABAgames/knightvspawns/verify/run_906.txt:2:expect score=211 items=broom,cat,conductor,dizzy,fire,gi,golden_heart,growing_heart,link,locomotive,meat,muscle,pillar,pony,steam,subwoofer,wall dur_ms=207260 hp=0 trunc=0 pre=pillar,steam,gi,growing_heart,pony
---
/e/a327ex/ABAgames/knightvspawns/audit/:

/e/a327ex/ABAgames/knightvspawns/verify/:
run_1030.txt
run_1031.txt
run_1040.txt
run_1041.txt
run_1050.txt
run_1051.txt
run_1060.txt
run_1061.txt
run_1070.txt
... [95 more lines]

I'm verifying the recursion mechanics by walking through a specific push scenario—a knight at (3,5) pushing a tank at (4,3) in the direction (+1,-1), with the blocker ending up at (5,2) in body mode. I need to check the board dimensions and trace how the tank's push distance compounds based on its stats and equipment like the glove and locomotor.

The tank moves one square to (5,2) but gets blocked by a pawn, triggering a recursive push_and_resolve call on that blocker. The blocker then slides to (6,1) if it's free, creating a chain of depth 2. To test deeper recursion, I'd add a third pawn at (6,1), forcing the middle pawn to transfer its push to the third one, creating a chain of 3. I'm confirming the recursion actually fires by checking that when the middle pawn gets blocked, it returns a stop condition that triggers another push_and_resolve call on the blocking pawn—yes, it does. So locomotive definitely works recursively.

Now I'm verifying the `arrive` timing in the else branch when stop equals 'pawn' and there's no path—it correctly sets arrive to show_delay, which then becomes the contact time for the push rejection VFX. This creates the right Newton's cradle effect where middle pawns don't move but outer ones do. I'm also checking edge cases like Curling Stone (which has infinite push distance) and the push_depth guard that prevents infinite chains, both of which look fine. There's a potential concern about the `_pushed` flag and recursion interaction that I'm starting to examine.…

54:BOARD_SIZE     = 8
1137:function pawn_at(gx, gy)
1148:function enemy_at(gx, gy)
1188:function doomed_at(gx, gy)
1444:function enemy_at_point(mx, my)

1137 function pawn_at(gx, gy)
1138      for _, p in ipairs(pawns) do
1139        if p.gx == gx and p.gy == gy then return p end
1140      end
1141    end
1142    
1143    -- Cell -> integer key (gx,gy in 0..7). Used by the `fires` tile map; decode with
1144    -- k // 100 (gx) and k % 100 (gy).
1145    function cell_key(gx, gy) return gx*100 + gy end
1146    
1147    -- A capturable ENEMY pawn at a cell (not a friendly ally, not an item drop).
1148    function enemy_at(gx, gy)
1149      for _, p in ipairs(pawns) do
1150        if p.gx == gx and p.gy == gy and not p.friendly and not p.item then return p end
1151      end
1152    end
1153    
1154    -- A Coin lying at a cell (its own list too, so effects can't sweep one up).
1155    function coin_at(gx, gy)
1156      for _, c in ipairs(coins) do
1157        if c.gx == gx and c.gy == gy then return c end
1158      end
1159    end
1160    
1161    -- A hunting Pony at a cell (Pony's knights live in their own list, not `pawns`).
1162    function pony_at(gx, gy)
1163      for _, py in ipairs(ponies) do
1164        if py.gx == gx and py.gy == gy then return py end
1165      end
1166    end
... [30 more lines]

I'm noticing that `push_step_blocked` correctly guards against transferring pushes into allies, drops, or corpses by checking that `enemy_at` returns a value. Now I need to write up the answer and design brief for the test lab change, which involves adding a third pawn to `mode = 'body'`, though that'll also affect Eight Ball's scenario.

Eight Ball only damages the immediate blocker, so an extra pawn would be extraneous there. Instead, I should introduce a new mode like `'chain'` or add a `chain = 3` flag specifically to the locomotive scene. Since this is a non-trivial change, I need to write a design brief first per the guidelines, even though it's small.

Looking at the geometry: the knight at (3,5) pushes the tank to (4,3) in direction (+1,-1), with blockers at (5,2) and (6,1), and the last free cell at (7,0) in the corner. When pawn C gets pushed from (6,1) to (7,0), it moves exactly 1 square and stops there since the loop completes without hitting a break condition, leaving `stop` as nil and ending the chain.

Visually this reads like Newton's cradle—three pawns lined up with the far one popping out—which is the classic legible setup. The geometry fits perfectly with the tank at (4,3) remaining blocked after the push, so Eight Ball's existing behavior stays unchanged. I'll add an optional `chain` parameter to the locomotive scene only. I'm interpreting "more than 2 pawns" as the tank plus at least 2 blockers (3 pawns total), so the transfer visibly chains through a middle link rather than stopping after one handoff. Using `chain_alt` to alternate between a simple 1-blocker transfer and a 3-blocker chain would match the existing lab style while demonstrating both the basic and recursive cases. I'm exploring whether a longer chain is possible by repositioning the knight lower on the board. If I place it at (1,7), the transfer direction becomes (+1,-1), which would create chain cells at (3,4), (4,3), (5,2), (6,1), and (7,0)—giving me 4 blockers with the final cell free. But I need to verify that (1,7) is a valid knight position given the board constraints.

Actually, I'm second-guessing whether I need to optimize further. The current setup with Tank and 2 blockers already demonstrates recursion with a depth-3 chain, which is sufficient to prove the concept. A longer chain would be a nicer demonstration of the Newton's cradle effect, but it requires repositioning. Let me check if moving the knight to (2,6) gives a cleaner result. Let me trace through the knight at (2,6) with the tank positioned at (3,4) — that's one step diagonally down-right. The blocker chain extends from (4,3) through (5,2) to (6,1), with the free corner at (7,0) where the final pawn moves. That gives me 4 pawns total at depth 4, but I need to verify whether the knight actually captures the tank or if the tank is just the strike target.

Actually, thinking about this more simply — the user just wants one test with more than 2 pawns. I could just add a chain count parameter to the locomotive and alternate between different chain lengths rather than overcomplicating the setup. Let me also confirm the blocker hp values don't matter here since no damage gets dealt to them without additional effects beyond the locomotive and glove.…

5080 -- The RIDERS: items that key on a pawn having been Pushed at all, whatever it
5081    -- ran into. Applied AFTER the stop payoff, and only to a survivor — a pawn
5082    -- already captured by Banana Peel or Coffin is not around to be bricked.
5083    -- ⚠ RULING 19 (new, mine — flag for the owner): these fire on any Push that
5084    -- RESOLVED, including one stopped dead with nowhere to go. "Pushed pawns take
5085    -- 1 damage" reads as the shove happening, not as distance covered; the
5086    -- alternative (movement required) would make Brick silently dead against the
5087    -- clotted late boards where a mass Push is most useful.
5088    -- `moved` is how many squares the shove actually COVERED (push_pawn's #path).
5089    -- It is nil for a caller that displaces without travelling — Tornado flings
5090    -- through the air and enters one square — and those correctly pay nothing on the
5091    -- distance rider. See the Tornado ruling in items_catalog.md.
5092    function push_riders(p, src, moved, arrive)
5093      if not p or p._gone or not items_enabled then return end
5094      -- 🧱 Brick: FLAT 1, never `your damage` (law 2 — and a retrofitted Wave with
5095      -- damage scaling would be a board-wide nuke). It scales with push COUNT,
5096      -- which is what a Force build actually stacks.
5097      if owned_set['brick'] then push_damage(p, 1, 'brick', arrive) end
5098      -- ⛔ ROCKET IS NOT HERE. Its damage is per SQUARE ENTERED and has to be able to
5099      -- kill the pawn part-way through its own slide, which a rider cannot do — the
5100      -- riders run after the shove has fully resolved, so a lump sum here killed the
5101      -- pawn at the far end of a slide it should never have finished. It is paid
5102      -- inside push_pawn instead, walking the path (rocket_toll).
5103      -- 😵 A SHOVE STUNS, whatever delivered it (owner, 2026-08-10). It used to be
5104      -- Dizzy's alone, which made the rule look general when it wasn't: a Glove push
5105      -- stunned only because a Glove push IS a strike, and strike_impact was doing
5106      -- it. Every push that was not a strike — a Subwoofer ring, a Wave, a Goal Net
5107      -- save — displaced pawns at no tempo cost at all, so the same keyword read two
5108      -- different ways depending on what caused it.
5109      -- 💫 Dizzy now BUYS THE LONGER HOLD rather than being the whole effect, which
... [25 more lines]

I'm verifying the chain geometry for the Locomotive interaction—confirming the blocker position based on the push direction from the Brick to the target, and I'm ready to provide a complete answer with the design brief for the lab change.

I'm considering two options: the simpler version with just one blocker (2 pawns total) that requires no knight repositioning, or a stronger demonstration with three blockers (4 pawns total) that shows deeper recursion by moving the knight once. Since the lab's purpose is to showcase what Locomotive does, I'm leaning toward the alternating version with the knight repositioned to create a 3-blocker chain—it better demonstrates the item's full potential while following the precedent of other alternating cycles in the lab.

I should also note an important detail about how this plays out: with `mode='body'`, the middle pawns in the chain won't actually move during evaluation—they'll be blocked and just experience reject-lunges while the tank pushes in and only the far pawn slides out. That's the Newton's cradle effect and reads correctly, but it's worth flagging so the owner knows what to expect visually.

Let me trace through the push order more carefully to make sure I have this right. Only B2 actually moves in this scenario—a perfect Newton's cradle effect. With the Curling Stone modifier at distance 8, B2 would slide further and hit the edge. The reject lunge is visible for middle pawns like B1 since the arrival delay is greater than zero, creating a readable impact into B2. The contact delays stack up through the chain at 0.13 seconds per link, so a four-pawn chain accumulates noticeable timing.

The push cycle completes well within the 2.4-second period. Now I need to verify whether old pawns persist across triggers or if they're cleared—looking at the trigger logic, it seems to create new pawns without calling fx_clear each cycle, so I should check if that's causing pawns to stack up.…

60   function fx_done_save()
61    local f = io.open(FX_DONE_PATH, 'w')
62    if not f then print('fx_lab: cannot write ' .. FX_DONE_PATH) return end
63    f:write('-- effect-work checklist, written by the F7 lab (C toggles)\n')
64    f:write('return {\n')
65    local ids = {}
66    for id in pairs(fx_done) do ids[#ids + 1] = id end
67    table.sort(ids)
68    for _, id in ipairs(ids) do f:write(("  ['%s'] = true,\n"):format(id)) end
69    f:write('}\n')
70    f:close()
71  end
72  
73  -- ── driver primitives ─────────────────────────────────────────────────────────
74  -- Direct board manipulation for staging. These SKIP the recorded-event paths on
75  -- purpose (no rec_event, no pawn_spawned emission unless asked) — the stage is
76  -- scenery; only the TRIGGER goes through the real paths.
77  
78  function fx_clear()
79    -- scenery only: item-owned entities (cloud, wall, ponies) belong to the
80    -- granted item and stay
81    pawns, skulls, coins = {}, {}, {}
82    fires, fire_vis = {}, {}
83    comet_mark = nil
84  end
85  
86  -- A pawn settled at an arbitrary cell. st: hp, frozen, stun, golden, slimy,
87  -- friendly. `emit` routes it through the real pawn_spawned event (spawn-mark
88  -- scenarios want the roll; everything else wants inert scenery).
89  function fx_pawn(gx, gy, st)
... [90 more lines]

The push trigger doesn't clear pawns, so they accumulate across cycles—the blocker persists and just gets pushed around. The tank at (4,3) gets struck (taking damage, hp drops to 3) but survives, and then the knight commits onto that same cell via a delayed function call, which is what actually captures it.…

1859-  end
1860-  FXLAB.code_open, FXLAB.code_sel_sec, FXLAB.last_perr = false, nil, nil
1861-  reset()                        -- clean sandbox: no archive, no dev items
1862-  ready_gate = false
1863-  spawns_on = false
1864-  grant_item(ITEM_DEFS[id])
1865:  FX_T[sc.t].setup(sc)
1866-  -- sections are built on ENTRY, not on E: the save-watcher hot-reloads this
1867-  -- item's spans from disk whether or not the panel is showing
1868-  fx_code_build()
1869-end
1870-
1871-function fx_back_to_grid()
1872-  FXLAB.mode, FXLAB.steps = 'grid', {}
1873-end
1874-
1875-function fx_trigger_now()
1876-  local sc = FX_SCENARIOS[FXLAB.item_id]
1877:  if sc then FX_T[sc.t].trigger(sc) end
1878-end
1879-
1880--- ── update ────────────────────────────────────────────────────────────────────
1881-function fxlab_frozen()   -- main.lua: the march/spawn clock halts under the grid
1882-  return FXLAB ~= nil and FXLAB.mode == 'grid'
1883-end
--
1918-    end
1919-    -- the auto loop
1920-    if FXLAB.auto and sc then
1921-      FXLAB.next_t = FXLAB.next_t - dt
... [9 more lines]

I'm realizing the key difference between the modes: in 'open' mode the tank gets pushed away from its spawn point, freeing up (4,3) for the next cycle, but in 'body' mode the tank stays blocked at (4,3), so a second tank spawns on top of it the following cycle. And pawns do accumulate across cycles in the push scenario since they're only blocked by the guard condition on the blocker, not the tank itself.…

182  -- resolve exactly as in play). Skipped while the knight is busy — the trigger
183 -- retries on the next cycle rather than corrupting a strike mid-flight.
184 function fx_commit(gx, gy)
185   if knight.strike or knight.chaining or angel_hold or game_state ~= 'playing' then return false end
186   commit_move(cell_key(gx, gy))
187   return true
188 end
189 
190 -- An empty in-bounds L-cell from the knight (upward-biased so the action stays
191 -- mid-board). `parity`: 'light'/'dark' filters by target-square color (Opal).
192 function fx_lcell(parity)
193   local best
194   for _, m in ipairs(VALID_MOVES) do
195     local tx, ty = knight.gx + m.x, knight.gy + m.y
196     if in_bounds(tx, ty) and not pawn_at(tx, ty) and not skull_at(tx, ty)
197        and not coin_at(tx, ty) and ty >= 1 and ty <= 6 then
198       local ok = true
199       if parity == 'light' then ok = square_is_light(tx, ty) end
200       if parity == 'dark' then ok = not square_is_light(tx, ty) end
201       if ok and (not best or ty < best.ty) then best = { tx = tx, ty = ty } end
202     end
203   end
204   if best then return best.tx, best.ty end
205 end
206 
207 -- pre-advance an every-Nth-capture counter / an every-N-beats counter
208 function fx_arm_count(id, n)
209   local it = owned_item(id)
210   if it then it.count = n - 1; item_count_show(it, it.count) end
211 end
... [40 more lines]

78:function fx_clear()
257:    fx_clear(); fx_knight(3, 5)
308:    fx_clear(); fx_knight(sc.mode == 'edge' and 6 or 3, 5)
360:    fx_clear(); fx_knight(3, 5)
408:    fx_clear(); fx_knight(1, 6)
443:  setup = function(sc) fx_clear(); fx_knight(3, 5) end,
500:  setup = function(sc) fx_clear(); fx_knight(0, 6) end,
515:      fx_clear()
548:    fx_clear(); fx_knight(3, 5)
574:  setup = function(sc) fx_clear(); fx_knight(3, 5) end,
600:  setup = function(sc) fx_clear(); fx_knight(3, 5) end,
602:    fx_clear(); fx_knight(3, 5)
616:  setup = function(sc) fx_clear(); fx_knight(2, 5) end,
629:    fx_clear(); fx_knight(0, 6)
649:  setup = function(sc) fx_clear(); fx_knight(3, 5) end,

So the tank isn't being cleared between cycles in the 'body' scenarios, which means pawns keep stacking at (4,3) across multiple iterations—that's a bug I need to address. Let me verify whether the tank actually persists when the knight moves onto that same position.

In 'open' mode, the tank moves away to (5,2) and stays there, so the next cycle spawns a fresh tank at (4,3) while the old one becomes the blocker at (5,2)—creating a different kind of mess where the blocking logic gets confused about which unit is where.

But wait, maybe the board self-cleans through the march mechanic: in scenario mode the march clock keeps running, so pawns walk down and escape off the bottom between cycles, which means the staged chain also marches down and gets cleared naturally. That would explain why the stacking doesn't break everything.

The blocker guard checks if a cell is empty before placing a pawn, and the tank gets created unconditionally — if a marching pawn happens to occupy that spot you get a stack, but it's rare and transient. For a 3-cell chain I should follow the same pattern: only place where empty, though if a random marcher lands on a chain cell it just becomes part of the chain anyway. The real subtlety is that pawns march downward while the push direction is up-right, so the staged chain pawns drift between cycles — but the `not pawn_at` guard re-places them each cycle, which handles it fine.

So the implementation is straightforward: in 'body' mode, place `sc.chain or 1` pawns along the direction starting from the tank position. Let me verify the knight cell (2,6) is valid — the knight teleports to (3,4), direction is (+1,-1), chain cells are (4,3), (5,2), (6,1), landing at (7,0), all in bounds. One remaining risk with the alternate knight position at ky=6 that I need to think through.

Actually, there's a simpler path: keep the knight at (3,5), tank at (4,3), and use chain = 2 for exactly 3 pawns with one middle link — no repositioning needed. But the alternating approach (1 or 3 blockers with the (2,6) knight) better captures Locomotive's cascade identity, so I'll recommend that version instead.

Wait, let me think through whether alternating actually adds value here. The precedent for alternating is showing different outcomes — but in this case, both the 1-blocker and 3-blocker versions show the same core mechanic: the stop transfers onward. The 1-blocker case is already visually contained within the 3-blocker case, so alternating doesn't really reveal anything new. Simpler to just stick with the long chain consistently and let the note speak for itself: "the stop transfers onward, link by link."

For the geometry, I can keep it minimal by setting `chain = 2` on the locomotive scene with the existing staging at (3,5) and (4,3), which gives blockers at (5,2) and (6,1) landing at (7,0). That's three pawns total with one middle link — exactly what demonstrates recursion — and requires zero new geometry. If we wanted to go to four pawns, the knight would need to start at (2,6), but I can mention that as an alternative rather than building it in.

Since the user asked for more than 2 pawns and the current locomotive has 2, setting `chain = 2` gives us 3 pawns which satisfies that requirement. I'll present this as the default with the 4-pawn variant as an optional upgrade, then lay out the full analysis with my recommendation before stopping.…

690    build's best real estate.)*
691 - 🎱 **Eight Ball** [Force, Damage] — "When a Push is stopped by a pawn, the
692   pawn in the way takes your damage." *(the collision payoff. The pushed
693   pawn is the cue ball — it takes nothing. "Stopped by a pawn" is precise:
694   a Push stopped by a skull is Coffin's business, and one stopped by a
695   drop, a coin, an ally or the knight is nobody's.)*
696 - 🚂 **Locomotive** [Force] — "When a Push is stopped by a pawn, that pawn
697   is Pushed onward in the same direction." *(the Newton's cradle. With
698   Eight Ball both fire on one stop — ruling 14; with Curling Stone every
699   transferred pawn slides too — ruling 15's cascade.)*
700 - ⚰️ **Coffin** [Force, Board] — "A pawn Pushed into a skull is captured,
701   and the skull is destroyed." *(the other half of the tank answer, and the
702   anti-mash hazard flipped into ammunition — skull placement becomes
703   opportunity. Routes through `mutual_destroy`, the standard practice;
704   without Coffin a Push into a skull square is simply stopped. Capture vs
705   destroy chosen per the vocabulary: the pawn pays score and tray, the
706   skull costs nothing.)*
707 - 🛑 **Stop Sign** [Force, Tank] — "The first time each pawn would escape, it
708   is Pushed back instead." *(the defensive bridge. Fires before the escape
709   resolves, so a saved pawn never rolls Hole. The save is spent even if the
710   Push is stopped — the pawn holds the beat and escapes normally on its
711   next; the keyword's stop clause is doing honest work, a clotted column
712   can't be saved into.)*
713 - 🥌 **Curling Stone** [Force] — "Pushed pawns slide until they are
714   stopped." *(capstone: the board becomes a shuffleboard. Slides end at
715   bodies — Eight Ball slams, Locomotive transfers — at skulls — Coffin
716   trades — at Flames, and at edges — Banana Peel. A crowded board is its
717   own brake; the open late-board lanes are where it sings.)*
718 
719 ### Cut

1075     Guard×Transformation crown jewel, or make forms also spend a move on
1076        Still beats?
1077    13. **Brick's cadence** (`[f]`): once per Push, however far it travels — or
1078        once per square entered? (Proposed: once per Push; per-square would make
1079        slide distance a damage stat and double-charge every long shove.)
1080    14. **Eight Ball + Locomotive** (`[f]`): both key on a stopped Push — do both
1081        fire on the same stop? (Proposed: yes — the slam lands, then the shove
1082        transfers; damage first, then the onward Push.)
1083    15. **Curling Stone + Locomotive** (`[f]`): with both owned every transferred
1084        Push slides too, so one strike can cascade a whole column off an edge.
1085        Bless it as the build's crown jewel, or bound it (a transferred Push does
1086        not slide)? (Proposed: bless — the setup is three specific items plus the
1087        ladder, and law 1 keeps the bottom edge out of it.)
1088    
1089    ## Sim law (unchanged, governs every card here)
1090    A trigger is only legal inside a recorded event: capture, beat, spawn, commit,
1091    strike ('a'), escape/leak, item-get. Continuous cursor position and animation
1092    timing are never triggers.

I'm ready to write the full answer now. I'll trace through the recursion with specific line references, confirm how the termination condition works, explain the Newton's cradle effect where middle elements stay stationary while the delay cascades outward, identify the guards that break the chain at boundaries, and then discuss the lab gap that led to the design decision to veto the change. The loop walks from the starting position along the push direction, placing a pawn at each step up to `chain` times, skipping cells that are out of bounds or already occupied. For the locomotive scene, `chain = 2` is the sweet spot—it leaves the final cell free so the cascade actually resolves and demonstrates the recursion mechanic, whereas three pawns would fill the lane completely and resolve as a no-op.…

324    trigger = function(sc)
325     FXLAB.cyc = FXLAB.cyc + 1
326     local kx, ky = (sc.mode == 'edge' and 6 or 3), 5
327     -- `edge_alt`: every other cycle, stage the same shove with the board RUNNING
328     -- OUT under it. The open placement always happens to have exactly enough
329     -- room — the tank lands on (4,3) and a three-square diagonal reaches (7,0)
330     -- dead on — so a long-Push item could never be seen being cut short, which
331     -- is most of what the extra range actually does in play. From (4,6) the tank
332     -- lands on (5,4) instead and the shove gets two of its three squares before
333     -- the side edge stops it. Same alternating trick as Banner and Helmet.
334     -- ⚠ (4,6), NOT (4,4). The push runs (+1,-1), so from (5,2) the pawn exits
335     -- through the CORNER — x and y run out on the same step — which resolves as
336     -- 'edge_top', a different stop kind, and reads ambiguously against a
337     -- diagonal. Two rows lower the x runs out first: a clean 'edge_side'.
338     if sc.edge_alt and FXLAB.cyc % 2 == 0 then kx, ky = 4, 6 end
339     fx_knight(kx, ky)
340     local tx, ty = kx + 1, ky - 2                 -- one L-move: dir is (+1,-1)
341     if not in_bounds(tx, ty) then return end
342     local dx, dy = push_dir_from(kx, ky, tx, ty)
343     if sc.mode == 'skull' then
344       local sx, sy = tx + dx, ty + dy
345       if in_bounds(sx, sy) and not skull_at(sx, sy) then fx_skull(sx, sy) end
346     elseif sc.mode == 'body' then
347       -- a second pawn directly in the shove's path, so the Push is STOPPED by a
348       -- pawn — the one stop kind Eight Ball and Locomotive key on
349       local bx, by = tx + dx, ty + dy
350       if in_bounds(bx, by) and not pawn_at(bx, by) then fx_pawn(bx, by, { hp = 2 }) end
351     end
352     local p = fx_pawn(tx, ty, { hp = 3 })         -- a tank: the hit must be a Strike
353     fx_after(0.45, function() fx_commit(p.gx, p.gy) end)
... [2 more lines]

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

audit_scores.py
package_win.py
sound_credits.py
sound_index.json
ui_layout_probe.lua
blender-4.5.12-windows-x64/
blender-4.5.12-windows-x64.zip
game-launch/

I need to figure out how to verify the KVP syntax without actually running the game. The anchor.exe tool supports a headless mode, and while `--render` would execute the game (which isn't allowed), a parse check is a mechanical verification that's explicitly expected. I'm looking for a syntax validation option that doesn't involve running the executable interactively.…

/e/a327ex/Anchor3/engine/anchor.exe*
/e/a327ex/Anchor3/engine/build/anchor-novideo.exe*
/e/a327ex/Anchor3/engine/build/anchor.exe*
1

43:require('verify')  -- headless replay-determinism harness (inert unless --verify)
47:require('annotate')-- headless per-mark event timeline (inert unless --annotate)
49:require('fxsmoke')  -- --fxsmoke: headless driver for the lab's scenarios (dev-only)
8526:  fxsmoke_update()   -- --fxsmoke: one headless pass over the lab's scenarios, then quit

1    --[[
2     tools/fxlab_smoke.lua — headless smoke test for the F7 lab's SCENARIOS.
3   
4     The lab is a windowed dev tool, so its scenario code (FX_SCENARIOS ->
5     FX_T[t].setup/trigger) is the one part of an item batch that no verify sweep
6     touches: a nil image, a renamed helper or a missing companion grant only
7     shows up when the owner opens the item and finds a dead loop. This drives
8     every scenario the way the lab does — open, setup, trigger repeatedly, with
9     real sim beats in between — and reports the ones that error or that produce
10    no visible effect at all.
11  
12    Boot with:  anchor.exe . --headless --fxsmoke
13                anchor.exe . --headless --fxsmoke=glove,brick,cat   (a subset)
14  
15    ⚠ Dev-only, like the lab itself. It never records, archives or submits.
16  ]]
17  
18  FXSMOKE = nil
19  
20  -- ⚠ BOOT ONLY RECORDS THE REQUEST; the pass itself runs on the first update
21  -- frame (fxsmoke_update). main.lua executes top-to-bottom and the boot hook
22  -- sits ~700 lines above functions the scenarios call — running synchronously
23  -- there made `combo_kick` (and anything else defined later) a nil global, which
24  -- looked exactly like a game bug. `verify` defers for the same reason.
25  function fxsmoke_boot()
26    local a = engine_args or {}
27    if not a.fxsmoke then return end
28    FXSMOKE = { want = true }
29    if a.fxsmoke ~= 'true' then
30      FXSMOKE.want = {}
... [87 more lines]

I'm running the mechanical harness in headless mode to verify the locomotive and eight_ball components along with their neighbors, checking that there…

Created layer: ui4_content_outline (rough)

Created layer: ui5_panel (rough)

Created layer: ui5_panel_outline (rough)

Created layer: ui5_content (rough)

Created layer: ui5_content_outline (rough)

Created layer: cursor (rough)

Created layer: cursor_outline (rough)

Created layer: emoji_shadow (rough)

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

Initialization complete. Press ESC to exit, F11 for fullscreen.

Headless loop starting...

fxsmoke: driving 12 scenarios

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s



fxsmoke: ======== REPORT ========

fxsmoke: no errors

fxsmoke: ========================

Shutting down...

The smoke test confirms pushes are being generated with no errors, but I need to verify the recursion actually went to depth 3 rather than just running successfully. Since fxsmoke doesn't print individual counts, I could either add a temporary debug statement or write a quick standalone check to compare push counts between `locomotive` and `eight_ball` alone.…

The file E:\a327ex\ABAgames\knightvspawns\fxsmoke.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fxsmoke.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: driving 4 scenarios
fxsmoke-depth: glove            pushes=4 maxdepth=1
fxsmoke-depth: eight_ball       pushes=6 maxdepth=1
fxsmoke-depth: locomotive       pushes=10 maxdepth=4
fxsmoke-depth: curling_stone    pushes=4 maxdepth=1
fxsmoke: ======== REPORT ========
fxsmoke: no errors
fxsmoke: ========================

The recursion is going deeper than expected—maxdepth of 4 instead of my predicted 3, because drifting pawns occasionally create that extra link in the chain. The push count is running at 10 over 4 cycles, which breaks down to the glove's 4 base pushes plus 6 transfers from other cycles, averaging about 1.5 transfers per cycle when cells get occupied by drifted marchers or lane shifts. This is a significant improvement over the previous version, which would've been around 8 pushes with a maxdepth of 2.…

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke-depth: locomotive       pushes=7 maxdepth=3

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fxsmoke.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fxsmoke.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: ======== REPORT ========
fxsmoke: no errors
fxsmoke: 16 scored nothing (check these by eye): heart, clover, chick, snow, cloud, guardian_angel, wall, growing_heart, hourglass, shield, web, helmet, turtle, golden_heart, old_clock, conductor
fxsmoke: ========================
Shutting down...

All test scenarios are passing cleanly—the sixteen cases that score nothing are the expected passive abilities like Turtle and Clover that legitimately don't contribute points. Locomotive and eight_ball aren't among those, so they're working as intended. Now I'm preparing the handover documentation with test instructions, starting with the file changes where I modified the FX_T.push trigger in fx_lab.lua to use a chain loop for the body branch and added locomotive to F…

 M fx_lab.lua

warning: in the working copy of 'fx_lab.lua', LF will be replaced by CRLF the next time Git touches it
diff --git a/fx_lab.lua b/fx_lab.lua
index d23031e..c7f6688 100644
--- a/fx_lab.lua
+++ b/fx_lab.lua
@@ -345,9 +345,25 @@ FX_T.push = {
       if in_bounds(sx, sy) and not skull_at(sx, sy) then fx_skull(sx, sy) end
     elseif sc.mode == 'body' then
       -- a second pawn directly in the shove's path, so the Push is STOPPED by a

-      -- pawn — the one stop kind Eight Ball and Locomotive key on
-      local bx, by = tx + dx, ty + dy
-      if in_bounds(bx, by) and not pawn_at(bx, by) then fx_pawn(bx, by, { hp = 2 }) end
+      -- pawn — the one stop kind Eight Ball and Locomotive key on.
+      -- `chain` (default 1) extends that into a LANE. One blocker only ever tests
+      -- the HANDOFF; Locomotive's transfer is a real recursion (push_resolve calls
+      -- push_and_resolve, which resolves again), and the link that could actually
+      -- be broken is a MIDDLE one — stopped by a pawn, and passing it on. Two
+      -- blockers is the shortest lane that has one.
+      -- ⚠ TWO, NOT THREE, from (4,3). The lane is (5,2), (6,1), (7,0) and it ends
+      -- at the corner: filling all three leaves the last transfer nowhere to go,
+      -- it resolves as 'edge_top', nothing moves at all and the scenario reads as
+      -- the item doing nothing. The free cell at the end IS the demo.
+      local bx, by = tx, ty
+      for _ = 1, sc.chain or 1 do
+        bx, by = bx + dx, by + dy
+        if not in_bounds(bx, by) then break end
+        -- the same `not pawn_at` guard as the single blocker had: the staged pawns
+        -- MARCH between cycles, so a drifted one already sitting in the lane is
+        -- used as a link rather than stacked on
+        if not pawn_at(bx, by) then fx_pawn(bx, by, { hp = 2 }) end
... [17 more lines]

So the Stop Sign item needs a predictive telegraph effect — when a pawn that will be stopped next beat enters the board this beat, the Stop Sign should visually appear as a blocking obstacle (similar to how the barricade works for Goal Net or Wall), then disappear after it pushes the pawn back, using the same visual effects on both sides of the interaction.…

I'm parsing the user's request about how Stop Sign should work visually. They want the stop sign to appear on the same beat as a pawn that will be affected by it next turn, similar to how the barricade behaves, and then block that pawn the way the barricade does.…

main.lua:784:-- Barricade: the bang as a pawn runs into it (soundeffect-lab, already ogg — copied
main.lua:2967:  if owned_set['barricade'] then spawn_wall() end
main.lua:3292:-- moves on the beat, like the barricade and every piece — not on a px/s drift.
main.lua:3333:-- Will this pawn still be here in `beats` beats? Uses the Barricade's own leak prediction,
main.lua:3334:-- plus the one case that prediction can't see: anything the Barricade is physically holding
main.lua:3630:-- only sends the barricade toward the stack sooner, so it errs the safe way.
main.lua:3662:    return 0, 0                                                        -- the barricade holds the leak
main.lua:3671:-- What column gx is worth to a barricade standing at column `from`. A pawn only counts
main.lua:3672:-- if the barricade can still GET THERE IN TIME: it covers one column per beat, so a pawn
main.lua:3688:-- The best column ANYWHERE on the board, not just the two neighbours — the barricade
main.lua:3719:-- a frozen beat: the barricade isn't held by ice or time.
main.lua:3720:-- Is an enemy pressed up against the barricade right now — bottom row, same column? Item
main.lua:3721:-- drops don't count: the barricade stops them too, but being pinned forever by an item the
main.lua:3734:  -- NEVER abandon a pawn it's already holding. That pawn escapes the instant the barricade
main.lua:5568:  -- and it clears the pawn before the barricade re-plans around it
main.lua:7360:-- Barricade stands in), not under the pawn's own square. The pawn was leaving
main.lua:7373:               -- span one at 30). A shade under the Barricade's 26, since the pit is a gap
main.lua:7455:  -- the pit opens OFF THE BOARD, in the Barricade's margin strip, under the
main.lua:10183:  for _, h in ipairs(holes) do h:draw() end   -- Hole's pits, in the margin strip with the Barricade
items.lua:128:-- barricade stays on the board, a Transform runs out its moves, a heal is kept.
items.lua:650:  item_def{ id = 'wall', name = 'Barricade', weight = 4, img = wall_img, tags = { 'tag_board' },
items.lua:651:            desc = 'Summon a barricade below the board. It moves one column per beat toward the most threatened column, and no pawn escapes past it.',
items_catalog.md:249:- 🚧 **Barricade** [Board] — "Summon a barricade below the board. It moves one column per beat toward the most threatened column, and no pawn escapes past it."
fx_lab.lua:512:-- the bottom edge: leaks blocked (Shield/Barricade), swallowed (Hole), or
fx_lab.lua:520:      -- ⚠ THE THREAT HAS TO BE REACHABLE OR THE BARRICADE CORRECTLY IGNORES IT.
fx_lab.lua:525:      -- so the barricade always arrives first, and the pawn reaches the bottom
fx_lab.lua:529:      -- (wall_holding), so last cycle's blocked pawn has to go or the barricade
fx_lab.lua:1541:  hole_swallow_vfx = 'The swallow: hole clip, the pit opens OFF-BOARD in the Barricade margin strip under the leaking column, the pawn falls from its square into it, 5 low black droplets, 0.25/0.12 shake. Deliberately no damage number - a Hole deals none.',

main.lua:669:stop_sign_img        = image_load('stop_sign',            'assets/stop_sign.png')            -- Stop Sign (first escape is Pushed back)
main.lua:5395:  emoji_puff(cx, cy, stop_sign_img, 6, 50, 120, 0.25, 0.45)
items.lua:1021:  item_def{ id = 'goal_net', name = 'Stop Sign', weight = 2, img = stop_sign_img,

5340   if not tornado then return end
5341      tornado.beats = tornado.beats - 1
5342      if tornado.beats <= 0 then
5343        emoji_puff(tornado.x, tornado.y, tornado_img, 8, 70, 160, 0.35, 0.6)
5344        tornado = nil
5345        return
5346      end
5347      local nx = math.clamp(tornado.gx + random_int(-1, 1, grng), 0, BOARD_SIZE - 1)
5348      local ny = math.clamp(tornado.gy + random_int(-1, 1, grng), 0, BOARD_SIZE - 1)
5349      tornado.gx, tornado.gy = nx, ny
5350      local cx, cy = cell_center(nx, ny)
5351      start_hop(tornado, cx, cy, 6, 0.12)
5352      local victim = enemy_at(nx, ny)
5353      if victim then tornado_fling(victim) end
5354    end
5355    
5356    -- The fling: a Push through the air to a random EMPTY square. It enters only
5357    -- its destination, so terrain on the way is irrelevant — but Brick and Dizzy
5358    -- still apply, because it is a Push.
5359    function tornado_fling(p)
5360      local free = {}
5361      for gy = 0, BOARD_SIZE - 1 do
5362        for gx = 0, BOARD_SIZE - 1 do
5363          if not push_step_blocked(gx, gy) then free[#free + 1] = { gx = gx, gy = gy } end
5364        end
5365      end
5366      if #free == 0 then return end
5367      local c = free[random_int(1, #free, grng)]
5368      p.gx, p.gy = c.gx, c.gy
5369      p._pushed = true
... [45 more lines]

1015   -- fatal edge leaks: one free save per pawn, spent whether or not it lands.
1016      -- Was "Goal Net" on 🥅, a solid square at HUD size. 🛑 is the sign that means
1017      -- exactly this rule. ⚠ Its silhouette is a filled octagon — nearly a circle at
1018      -- 18px, so this one leans on COLOR and cultural read rather than outline, the
1019      -- one place in the icon set where that is the deliberate trade.
1020      -- ⚠ ID STAYS `goal_net` (16 verify fixtures name it) — see the note on Angry.
1021      item_def{ id = 'goal_net', name = 'Stop Sign', weight = 2, img = stop_sign_img,
1022                tags = { 'tag_force', 'tag_tank' },
1023                desc = 'The first time each pawn would escape, it is Pushed back instead.' }
1024    
1025      -- The capstone: the board becomes a shuffleboard. Slides end at bodies
1026      -- (Eight Ball slams, Locomotive transfers), at skulls (Coffin trades), at
1027      -- Flames, and at edges (Banana Peel). A crowded board is its own brake.
1028      item_def{ id = 'curling_stone', name = 'Curling Stone', weight = 1, img = curling_stone_img,
1029                tags = { 'tag_force' },
1030                desc = 'Pushed pawns slide until they are stopped.' }
1031    
1032      -- ── the `[f]` RETROFITS: items whose effect always was a Push ──────────────
1033      item_def{ id = 'wave', name = 'Wave', weight = 2, img = wave_img, beat_max = 16,
1034                tags = { 'tag_board', 'tag_beat', 'tag_force' },

201:DEATH_REVEAL_DELAY  = 1.2    -- s after death before the GAME OVER UI + scoreboard reveal (lets the death VFX finish; unscaled wall-time)
635:wall_img             = image_load('construction',     'assets/construction.png')   -- Wall icon + the blocker under the board
786:sound_declare('wall_block',  'assets/sounds/wall_block.ogg')
854:volumes.wall_block    = 0.55
1008:wall              = nil   -- Wall's blocker: stands OFF-BOARD under one column, never dies
1063:ready_gate_t = 0          -- overlay pulse clock (raw wall dt; visual only)
1094:-- ⚠ Replay-exact: `combo_sim_ms` is an integer sim stamp, never wall time.
2826:  wall             = nil
2908:  -- — so on_acquire hooks that touch grng (spawn_pony/spawn_wall/Hourglass) all
2946:  cloud, wall = nil, nil
2967:  if owned_set['barricade'] then spawn_wall() end
3337:  if wall and wall.gx == p.gx and p.gy == BOARD_SIZE - 1 then return true end
3614:-- The wall does NOT stand on a tile: it sits in the gutter under the board, beneath
3623:function wall_pos(gx)
3661:  elseif ny >= BOARD_SIZE and not p.friendly and wall and wall.gx == p.gx then
3677:function wall_score(gx, from)
3691:function wall_target()
3692:  local best, best_v, best_d = wall.gx, wall_score(wall.gx, wall.gx), 0
3694:    local v, d = wall_score(gx, wall.gx), math.abs(gx - wall.gx)
3701:function spawn_wall()
3704:    local s = wall_score(gx, gx)   -- placed anywhere on arrival, so distance is free
3707:  wall = { gx = best, spring = spring_new(), timer = timer_new(), flashing = false,
3709:  wall.x, wall.y = wall_pos(best)
3710:  spring_pull(wall.spring, 'main', 0.6)
3711:  item_pulse_id('wall')
3712:  sfx(sounds.wall_place, volumes.wall_place)   -- (sfx is nil-safe until the clip lands)
3713:  emoji_puff(wall.x, wall.y, wall_img, 8, 45, 120, 0.35, 0.6)
3723:function wall_holding()
3725:    if p.gx == wall.gx and p.gy == BOARD_SIZE - 1 and not p.friendly and not p.item then
3732:function wall_march()
... [30 more lines]

3610   for _, s in ipairs(skulls) do draw_shadow(s, SKULL_PX*0.46, 3) end
3611    end
3612    
3613    -- ── Wall (the off-board blocker) ─────────────────────────────────────────────
3614    -- The wall does NOT stand on a tile: it sits in the gutter under the board, beneath
3615    -- one column, and stops enemies in that column from ever leaking. It shuffles one
3616    -- column per beat toward wherever the danger is, and it never dies. Because it isn't
3617    -- on the board it costs the player no landing square and needs no occupancy plumbing.
3618    WALL_PX       = 26
3619    WALL_HOP_H    = 3      -- a heavy shuffle sideways, not a leap
3620    WALL_HOP_DUR  = 0.16
3621    
3622    -- Screen position of the blocker under column gx: centered on the slab's front face.
3623    function wall_pos(gx)
3624      return BOARD_X + gx*SQUARE + SQUARE/2, BOARD_Y + BOARD_SIZE*SQUARE + SLAB/2 + 2
3625    end
3626    
3627    -- Beats until this pawn would step off the bottom, predicted: one row per beat, doubled
3628    -- while it's slimy (Snail crawls), plus any beats it's frozen for (Water Gun). A pawn
3629    -- stuck behind others will really take longer — the estimate is pessimistic there, which
3630    -- only sends the barricade toward the stack sooner, so it errs the safe way.
3631    -- Does this piece march every OTHER beat? Slimy pawns always do (Snail), and
3632    -- DROPS do while Turtle is owned. One predicate so the march walk, the leak
3633    -- prediction and anything else that reasons about cadence can never disagree.
3634    function piece_slow_cadence(p)
3635      if p.slimy then return true end
3636      return p.item ~= nil and items_enabled and owned_set['turtle'] ~= nil
3637    end
3638    
3639    -- Which way a piece is about to step THIS beat, as a grid direction, or 0,0 if

3744 
3745    -- An enemy stopped from leaking by the wall: it stays on the bottom row, so its column
3746    -- backs up behind it. The wall thumps and sheds brick chips.
3747    function wall_block(p)
3748      -- A pinned pawn presses against it every beat, so only the FIRST impact for a given pawn
3749      -- gets the bang, the chips and the shake; after that it just keeps leaning on it. Without
3750      -- this the same slam would loop forever under a held pawn.
3751      local first = not p.wall_hit
3752      p.wall_hit  = true
3753      wall.flashing = true
3754      timer_after(wall.timer, 0.1, 'flash', function() wall.flashing = false end)
3755      spring_pull(wall.spring, 'main', first and 0.4 or 0.14)
3756      if not first then return end
3757      sfx(sounds.wall_block, volumes.wall_block)
3758      -- Chips thrown properly: bigger, faster, and pulled down hard enough that the
3759      -- throw reads as an ARC rather than a spray. The duration goes up with them —
3760      -- at the old 0.3s floor a fast chip dies at the top of its climb, which is the
3761      -- one part of the arc that doesn't sell weight.
3762      for k = 1, 5 do
3763        spawn_emoji_particle(wall.x, wall.y - 4, wall_img, {
3764          velocity = random_float(110, 230), direction = random_float(-math.pi, 0),
3765          duration = random_float(0.35, 0.6), scale = random_float(0.6, 1.0),
3766          gravity = 560, flash_on_spawn = 0.3,
3767        })
3768      end
3769      shake_trauma(main_camera.shake, 0.3, 0.15)
3770    end
3771    
3772    function draw_wall()
3773      if not wall then return end
... [12 more lines]

5690       -- Freeze and Lock still shadow it on purpose: those are hard holds and
5691          -- stacking them in series reads right. Banking is not a hold — the piece
5692          -- is taking its beat, it just doesn't advance on it.
5693          if p.stun and p.stun > 0 then p.stun = p.stun - 1 end
5694          slime_drag(p)
5695        else
5696          if piece_slow_cadence(p) then p.slow_ready = false end   -- moves this beat — re-arm for next cycle
5697          local dir = p.friendly and -1 or 1
5698          local ny  = p.gy + dir
5699          -- STUNNED (KVP4): struck by the horse and survived, so it loses this
5700          -- beat — which is what lets the horse pin a tank in place by hitting it
5701          -- repeatedly instead of racing it down the board. The CAUSE decides the
5702          -- visual: it holds SILENTLY only when the way was actually clear, and
5703          -- still shoves against whatever is in front of it otherwise, so a
5704          -- stunned tank and an ordinary pawn read identically when the horse is
5705          -- standing in their path.
5706          if p.stun and p.stun > 0 then
5707            p.stun = p.stun - 1
5708            if in_bounds(p.gx, ny) and occ[key(p.gx, ny)] then bump(p, 0, dir) end
5709          elseif ny >= BOARD_SIZE and not p.friendly and wall and wall.gx == p.gx then
5710            -- Wall stands in the gutter under this column: the enemy CAN'T leak. It holds
5711            -- the bottom row (cell kept), so the column dams up behind it.
5712            bump(p, 0, dir)
5713            wall_block(p)
5714          elseif ny < 0 or ny >= BOARD_SIZE then
5715            occ[key(p.gx, p.gy)] = nil            -- off the board (enemy leaks / friendly escapes)
5716            leaked[#leaked + 1] = p
5717          else
5718            local o = occ[key(p.gx, ny)]
5719            if o == 'coin' and not p.friendly and not p.item then
... [30 more lines]

151:-- tray sits out entirely — flat 1 gold per capture replaces it); a leaked drop
161:DROP_RETRY_BEATS = 8                        -- a leaked drop re-queues this many beats out
3949:  -- Session drops are a PROMISE: a leaked drop re-queues a few beats out and
5389:function goal_net_save(p)
5668:  local leaked, burned, traded, crashed = {}, {}, {}, {}
5716:        leaked[#leaked + 1] = p
5862:  for _, p in ipairs(leaked) do
5865:    if goal_net_save(p) then goto next_leak end

5845     if c then
5846          for i = #coins, 1, -1 do if coins[i] == c then table.remove(coins, i); break end end
5847          item_burst(c.x, c.y, coin_img, 8, 60, 140, 0.3, 0.5)
5848          spawn_dying_piece(c.x, c.y, coin_img, COIN_PX)
5849          sfx_any('coin_collect', 3)
5850        end
5851      end
5852    
5853      -- burned: pawn captured / item collected at the flame (items collected too).
5854      for _, p in ipairs(burned) do
5855        for i = #pawns, 1, -1 do if pawns[i] == p then table.remove(pawns, i); break end end
5856        p.cap_flavor = 'fire'
5857        resolve_hit(p, 0)
5858      end
5859      if #burned > 0 then item_pulse_id('fire') end   -- pop the Fire icon on a burn/collect
5860    
5861      -- off the board: an enemy costs a life, an item despawns, a friendly escapes free
5862      for _, p in ipairs(leaked) do
5863        -- 🥅 GOAL NET gets first refusal, BEFORE Hole rolls: the pawn never leaves
5864        -- the board, so it is not removed from `pawns` and nothing else resolves.
5865        if goal_net_save(p) then goto next_leak end
5866        for i = #pawns, 1, -1 do if pawns[i] == p then table.remove(pawns, i); break end end
5867        if p.friendly then ally_escape(p)
5868        elseif p.item then item_leak(p)
5869        elseif items_enabled and owned_set['hole'] and chance_1_in(4) then
5870          -- Hole: it falls in instead of getting past you. A REAL capture — it scores and
5871          -- credits the tray (a golden pawn still pays 5) — it just costs no life.
5872          p.cap_flavor = 'hole'
5873          resolve_capture(p, 0)
5874        else on_hp_loss(p) end
... [30 more lines]

3325   local cx, cy = cell_center(BOARD_SIZE//2, 0)
3326      cloud = { gx = BOARD_SIZE//2, gy = 0, x = cx, y = cy,   -- square + animated position
3327                target = nil, armed = nil, spring = spring_new(), timer = timer_new() }
3328      sfx(sounds.cloud_spawn, volumes.cloud_spawn)
3329      item_pulse_id('cloud')
3330      emoji_puff(cx, cy - CLOUD_Z, cloud_img, 8, 40, 110, 0.35, 0.6)
3331    end
3332    
3333    -- Will this pawn still be here in `beats` beats? Uses the Barricade's own leak prediction,
3334    -- plus the one case that prediction can't see: anything the Barricade is physically holding
3335    -- on the bottom row never leaves at all.
3336    function pawn_survives(p, beats)
3337      if wall and wall.gx == p.gx and p.gy == BOARD_SIZE - 1 then return true end
3338      return pawn_beats_to_leak(p) > beats
3339    end
3340    
3341    function cloud_target_valid()
3342      if not cloud.target then return false end
3343      for _, p in ipairs(pawns) do if p == cloud.target then return true end end
3344      return false   -- captured out from under it, or it left the board
3345    end
3346    
3347    -- FIRE INTO THE SQUARE it settled over — whoever is standing there takes the
3348    -- bolt, and an empty square takes nothing but the flash. That miss is not a
3349    -- failure case: the parked cloud telegraphs the cell a full beat ahead, so
3350    -- clearing the pawn out from under it is counterplay you were offered and took.
3351    function cloud_strike(gx, gy)
3352      cloud.target = nil
3353      local cx, cy = cell_center(gx, gy)
3354      local p = enemy_at(gx, gy)

3640 -- it is going to hold. Break effects lean their debris along it, so a piece that
3641    -- shatters on the move throws its pieces the way it was going and a blocked one
3642    -- just bursts in place.
3643    --
3644    -- ⚠ This MIRRORS the hold rules in march_pawns' walk chain and has to be kept
3645    -- with them. It exists because the freeze RELEASE runs at the top of the beat,
3646    -- before the occupancy map is built, so it cannot simply ask the walk what
3647    -- happened. The failure mode if the two drift apart is a few pixels of lean in
3648    -- the wrong direction, so keep it cheap rather than exhaustive.
3649    -- ⚠ p.frozen is deliberately NOT a hold here: the caller runs on the beat the
3650    -- freeze is released, with the flag still set and about to be cleared, so
3651    -- reading it would zero the lean on the one beat this is for.
3652    -- Walking OFF the board is movement, not a hold — a leaking pawn still leans.
3653    function piece_advance_dir(p)
3654      if (p.lock and p.lock > 0) or (p.stun and p.stun > 0) then return 0, 0 end
3655      if piece_slow_cadence(p) and not p.slow_ready then return 0, 0 end   -- banking this beat
3656      local dir = p.friendly and -1 or 1
3657      local ny  = p.gy + dir
3658      if ny >= 0 and ny < BOARD_SIZE then
3659        if pawn_at(p.gx, ny) or skull_at(p.gx, ny) or coin_at(p.gx, ny) or pony_at(p.gx, ny) then return 0, 0 end
3660        if knight.gx == p.gx and knight.gy == ny and not knight.airborne then return 0, 0 end
3661      elseif ny >= BOARD_SIZE and not p.friendly and wall and wall.gx == p.gx then
3662        return 0, 0                                                        -- the barricade holds the leak
3663      end
3664      return 0, dir
3665    end
3666    
3667    function pawn_beats_to_leak(p)
3668      return (BOARD_SIZE - p.gy)*(piece_slow_cadence(p) and 2 or 1) + (p.lock or 0)
3669    end
... [45 more lines]

I'm checking the sound declarations for the wall block effect, which is already in OGG format and has its volume set to 0.55.

For the stop-sign block, the user wants the same sound as the barricade. Since the sign appears and then blocks, I should map the appear moment to `wall_place` and the block moment to `wall_block`, mirroring how the barricade works with both a placement and impact sound.…

sound_moments.lua:35:    broom_hit = { 'capture_impact' },
fx_lab.lua:755:  goal_net       = { t = 'defense', kind = 'leak' },
fx_lab.lua:804:  { key = 'capture_impact1', label = 'chord: impact' },
fx_lab.lua:847:  wall           = { { key = 'wall_place', label = 'placement', pending = true },
fx_lab.lua:848:                     { key = 'wall_block', label = 'the block' } },
fx_lab.lua:857:                     { key = 'capture_impact1', label = 'chord: impact' } },
fx_lab.lua:864:                     { key = 'capture_impact1', label = 'strike chord' } },
fx_lab.lua:865:  web            = { { key = 'capture_impact1', label = 'strike chord' } },
fx_lab.lua:1461:  wall           = { 'fn:spawn_wall', 'fn:wall_march', 'fn:wall_block' },
fx_lab.lua:1542:  spawn_wall      = 'Placement: the best-scored column, wall_place clip (slot still empty - drop a file), 8-sign puff, 0.6 spring.',
fx_lab.lua:1544:  wall_block      = 'The stop: FIRST impact per pawn = wall_block clip + 5 chips flung up + 0.3/0.15 shake + 0.4 spring; after that it leans quietly (0.14).',
fx_lab.lua:1549:  strike_impact   = 'One strike hit: victim flash + 0.22 spring, Stun applied (STUN_BEATS + Web), the horse reacts AT CONTACT (0.5 spring + flash), capture_impact + the Gi accent, 0.3/0.14 shake.',
main.lua:577:  'subwoofer', 'goal_net',                             -- the other appliers
main.lua:706:sound_declare('capture_impact1',  'assets/sounds/capture_impact1.ogg')
main.lua:707:sound_declare('capture_impact2',  'assets/sounds/capture_impact2.ogg')
main.lua:708:sound_declare('capture_impact3',  'assets/sounds/capture_impact3.ogg')
main.lua:786:sound_declare('wall_block',  'assets/sounds/wall_block.ogg')
main.lua:801:volumes.capture_impact1 = 0.50
main.lua:802:volumes.capture_impact2 = 0.50
main.lua:803:volumes.capture_impact3 = 0.50
main.lua:854:volumes.wall_block    = 0.55
main.lua:3712:  sfx(sounds.wall_place, volumes.wall_place)   -- (sfx is nil-safe until the clip lands)
main.lua:3747:function wall_block(p)
main.lua:3757:  sfx(sounds.wall_block, volumes.wall_block)
main.lua:5248:  sfx_any('capture_impact', 2)
main.lua:5389:function goal_net_save(p)
main.lua:5390:  if not items_enabled or not owned_set['goal_net'] then return false end
main.lua:5393:  push_and_resolve(p, 0, -1, 'goal_net')
main.lua:5396:  sfx_any('capture_impact', 2)
main.lua:5480:  sfx_any('capture_impact', 3)

I'm noticing that `wall_place` is pending in the sound lab with no clip loaded yet, so `sounds.wall_place` is nil—which means mapping the sign's appear sound to it would be silent for now. That's acceptable since it's honest about the current state, though it effectively makes the sign sound the same as the barricade block. Now I'm checking the goal_net fx_lab scene to see what defense effects are defined there.…

496          local ax, ay = tx + o[1], ty + o[2]
497         if in_bounds(ax, ay) and not pawn_at(ax, ay) then fx_pawn(ax, ay) end
498       end
499       -- ⚠ Commit onto the drop's LIVE cell, not the one it was placed on: a
500       -- drop MARCHES, so if a beat falls inside this delay the knight was
501       -- landing on the square the drop had just left — and the pawn that
502       -- marched in behind it got captured instead, so Dynamite (an on-PICKUP
503       -- item) never fired. Same fix the `package` scenario already carries.
504       fx_after(0.5, function()
505         if pawn_at(d.gx, d.gy) == d then fx_commit(d.gx, d.gy) end
506       end)
507       fx_after(1.6, fx_ungrant_strays)
508     end
509   end,
510 }
511 
512 -- the bottom edge: leaks blocked (Shield/Barricade), swallowed (Hole), or
513 -- fatal (Guardian Angel)
514 FX_T.defense = {
515   period = 4.0,
516   setup = function(sc) fx_clear(); fx_knight(0, 6) end,
517   trigger = function(sc)
518     local col = sc.col or 5
519     if sc.kind == 'wall' then
520       -- ⚠ THE THREAT HAS TO BE REACHABLE OR THE BARRICADE CORRECTLY IGNORES IT.
521       -- wall_score only counts a pawn when the column distance is within its
522       -- beats-to-leak, so a pawn dropped at row 5 five columns away scores zero
523       -- and the wall never moves — which read as the item being broken.
524       -- Row 3, three columns off: five beats of life against a three-beat walk,
525       -- so the barricade always arrives first, and the pawn reaches the bottom
... [30 more lines]

755:  goal_net       = { t = 'defense', kind = 'leak' },

1440   clover         = {},
1441      boom           = { 'fn:boom_splash', 'fn:boom_vfx' },
1442      magnet         = { 'fn:magnet_pull', 'fn:capture_vfx' },
1443      water_gun      = { 'fn:water_gun_spray', 'fn:spawn_water_splash' },
1444      fire           = { 'fn:ignite_tile', 'fn:update_fires', 'fn:fire_scorch', 'const:FIRE_RISE' },
1445      dagger         = { 'fn:dagger_throw', 'const:DAGGER_SPEED' },
1446      dynamite       = { 'fn:boom_splash', 'fn:boom_vfx' },
1447      egg            = { 'fn:hatch_ally', 'fn:ally_clash' },
1448      chick          = { 'fn:defect_pawn' },
1449      pony           = { 'fn:spawn_pony', 'fn:pony_act' },
1450      crown          = { 'fn:transform' },
1451      castle         = { 'fn:transform' },
1452      seedling       = { 'fn:piece_tint' },
1453      snail          = { 'fn:piece_tint' },
1454      snow           = { 'fn:freeze_pawns', 'fn:spawn_ice_shatter', 'fn:freeze_drift' },
1455      comet          = { 'fn:comet_beat', 'fn:comet_resolve', 'const:COMET_FLIGHT' },
1456      cloud          = { 'fn:cloud_strike', 'fn:spawn_cloud', 'const:BOLT_FLIGHT' },
1457      coffee         = { 'fn:combo_kick', 'fn:update_combo' },
1458      coin           = { 'fn:spawn_coin', 'fn:collect_coin' },
1459      guardian_angel = { 'fn:angel_sequence', 'fn:angel_cleanse', 'fn:angel_burst' },
1460      hole           = { 'fn:hole_swallow_vfx' },
1461      wall           = { 'fn:spawn_wall', 'fn:wall_march', 'fn:wall_block' },
1462      growing_heart  = { 'fn:heal_vfx' },
1463      hourglass      = { 'fn:freeze_pawns', 'fn:draw_stone_shell', 'fn:spawn_stone_shatter' },
1464      shield         = { 'fn:shield_absorb', 'fn:shield_recharge' },
1465      meat           = { 'fn:heal_vfx' },
1466      sword          = STAT_SPANS,
1467      hammer         = STAT_SPANS,
1468      tooth          = STAT_SPANS,
1469      steam          = STAT_SPANS,
... [15 more lines]

I need to gather more details about the drawing system—checking how `emoji_puff`, `spawn_emoji_particle`, and `draw_shadow` work, understanding the `SLAB` and `BOARD_Y` constants, and tracing the draw order to see where `draw_wall` gets called and whether anything renders in the margin strip below the board. I also need to look at the pawn's `bump` function to understand how the barricade block collision works.

For the stop sign mechanic, I'm parsing the user's description carefully: "blocks the pawn like the barricade does (same effects on both ends)" seems to mean the visual and audio feedback—the bump animation, flash, spring effect, chip shedding, camera shake—should match the barricade's behavior on both the pawn and sign. The card says "Pushed back," and the current code pushes the pawn back one row, but I need to clarify whether the mechanic itself changes or if it's just the presentation that should match the barricade's polish.

The real question is the timing: the stop sign appears one beat early as a telegraph, warning the player that a pawn will be affected next beat.

To predict which pawns will be affected, I need to check at the end of a beat whether a pawn is unfriendly, unnetted, on the bottom row, and will actually advance next beat (accounting for locks, stuns, slow cadence, occupancy, and barricade blocks). The `piece_advance_dir` function already computes the direction a piece will step, so I need to figure out when to call it to get the right prediction. So signs spawn at the end of a beat for pawns predicted to leak next, then get used or cleaned up during the next beat's goal processing. A sign only lasts one beat, and since multiple pawns can't occupy the same column on the bottom row, I can key the sign set by column — one sign per column maximum. Now I need to figure…

10170      for _, s in ipairs(splashes) do s:draw_shadow() end   -- droplet shadows
10171     for _, e in ipairs(embers) do e:draw_shadow() end     -- fire-ember shadows
10172     for _, e in ipairs(rising_stars) do e:draw_shadow() end   -- Guardian Angel's rising sparks
10173     for _, e in ipairs(shards) do e:draw_shadow() end         -- ice chips + comet debris
10174     for _, a in ipairs(afterimages) do a:draw() end   -- horse chain trail, under the horse
10175     camera_detach(main_camera, deco_layer)
10176   
10177     camera_attach(main_camera, game_layer)
10178     draw_board_pieces()
10179     draw_skulls()                                                           -- KVP4 hazards: board pieces, so they draw WITH the pawns (under the horse)
10180     for _, p in ipairs(captured_pending) do draw_board_piece(p) end
10181     if game_state == 'playing' then draw_piece(knight, knight_sprite(), KNIGHT_PX) end
10182     for _, py in ipairs(ponies) do draw_piece(py, knight_img, KNIGHT_PX) end   -- white horse (friendly tint)
10183     for _, h in ipairs(holes) do h:draw() end   -- Hole's pits, in the margin strip with the Barricade
10184     draw_wall()                                                               -- the blocker, under the board
10185     draw_coins()                                                              -- coins lying on the board
10186     for _, p in ipairs(pawns)            do draw_stone_shell(p) end   -- 🪨 the petrified swallow the piece
10187     for _, p in ipairs(captured_pending) do draw_stone_shell(p) end   -- ...and keep it while the corpse shows
10188     for _, p in ipairs(pawns) do draw_status_badges(p) end   -- ❄️🪨💧🐌🌱 stacked above each pawn
10189     for _, p in ipairs(pawns) do draw_stun_stars(p) end      -- ⭐ orbiting a Stunned pawn's head
10190     draw_comet_indicator()                                   -- ☄️ over the marked square
10191     camera_detach(main_camera, game_layer)
10192   
10193     -- 🧊 the Frozen block: its own PLAIN layer above the pieces (see draw_frost_cube
10194     -- — a translucent draw on an outlined layer goes black-backed and murky).
10195     -- Corpses keep their cube for the beat they stay visible, or the ice would
10196     -- blink off a frozen pawn the instant it was captured.
10197     -- both of draw_frost_cube's targets need the camera: the visible block AND the
10198     -- outline_only source it derives its rim from. camera_attach is a queue-time
10199     -- push, so the bracket only has to be open while the draws are queued —

55:SQUARE         = 30
56:SLAB           = 16      -- board slab thickness (3D edge showing below the top)
57:BOARD_X        = (gw - BOARD_SIZE*SQUARE)/2                 -- 120
58:BOARD_Y        = (gh - (BOARD_SIZE*SQUARE + SLAB))/2        -- centered incl. slab

I'm working through the board dimensions and positioning calculations. With SQUARE=30 and BOARD_SIZE=8, I need to verify the canvas width and height—BOARD_X=120 suggests gw=480, and I'm deriving BOARD_Y from the canvas height. For the wall positioning, I'm calculating the x-coordinate as the board's left edge plus the grid position offset, and the y-coordinate places it below the board with some padding.…

38:gw, gh = width, height
497:main_camera = camera_new(gw, gh)   -- static view; trauma punches only
10050:  layer_rectangle(overlay_layer, 0, 0, gw, gh, black())
10067:  layer_rectangle(overlay_layer, 0, 0, gw, gh, black())
10116:  layer_rectangle(overlay_layer, 0, 0, gw, gh, black())
10131:  layer_rectangle_gradient_v(bg_layer, 0, 0, gw, gh, bg_grad_top(), bg_grad_bottom())

28   ]]
29  
30  require('anchor')({
31    width  = 480,
32    height = 270,
33    title  = 'KNIGHT VS. PAWNS',
34    scale  = 3,
35    filter = 'rough',
36  })
37  
38  gw, gh = width, height
39  
40  require('emoji')
41  require('items')   -- passive-item system (catalog + stats + event dispatcher)
42  require('glossary')-- keyword definitions + the hover stack (Slay the Spire shape)
43  require('verify')  -- headless replay-determinism harness (inert unless --verify)
44  require('render')  -- offline replay -> PNG capture for trailers (inert unless --render)
45  require('viewer')  -- in-engine moment viewer / cut picker (inert unless --viewer)
46  require('edit')    -- in-engine clip editor / timeline (inert unless --edit / F5)
47  require('annotate')-- headless per-mark event timeline (inert unless --annotate)
48  require('fx_lab')  -- F7 effect lab: per-item effect scenarios on loop (dev-only)
49  require('fxsmoke')  -- --fxsmoke: headless driver for the lab's scenarios (dev-only)
50  
51  -- -----------------------------------------------------------------------------
52  -- constants
53  -- -----------------------------------------------------------------------------
54  BOARD_SIZE     = 8
55  SQUARE         = 30
56  SLAB           = 16      -- board slab thickness (3D edge showing below the top)
57  BOARD_X        = (gw - BOARD_SIZE*SQUARE)/2                 -- 120
... [2 more lines]

I'm working through the vertical positioning of the game board and wall elements—calculating that the wall sits at y=257 and spans down to the screen bottom at y=270, with the board occupying the space above it.…

902:board_side  = color(150, 152, 158)  -- the slab thickness (a lighter band)
928:time_glow   = color(120, 120, 120)  -- flat neutral-gray wash on pawns stopped by Hourglass
993:bg_grad_top    = color(46, 52, 68)
994:bg_grad_bottom = color(28, 32, 44)
995:bg_deco_color  = color(58, 65, 86)   -- silhouette tint, just above the gradient
6707:angel_tint    = color(255, 248, 0)     -- recomputed per frame from angel_glow (gold -> white)
8894:function draw_slab()
8900:function draw_board_top()
9312:function draw_board_pieces()

890  function sfx_echo(sound, vol, taps, gap, decay)
891   sfx(sound, vol)
892   local v = vol
893   for i = 1, taps do
894     v = v*decay
895     local vi = v
896     timer_after(juice_unscaled_timer, gap*i, function() sfx(sound, vi) end)
897   end
898 end
899 
900 board_light = fg                    -- cream squares
901 board_dark  = gray                  -- neutral gray squares
902 board_side  = color(150, 152, 158)  -- the slab thickness (a lighter band)
903 -- ⭐ THE NEUTRALISER (owner, 2026-08-01, in two passes: "too black, the pawns
904 -- aren't 0,0,0", then "make it white like the ally pawns"). It is the FIRST
905 -- half of a two-stage wash that makes the horse-sprited Pony match the
906 -- pawn-sprited allies exactly. MEASURED, not eyeballed:
907 --   pawn body  (49,55,61)   — 91% of that sprite's opaque pixels
908 --   horse body (193,105,79) — 79% of its own
909 -- 255*target/src = (65,148,197)... = (65,124,197) maps one onto the other, so
910 -- the horse's body lands on the PAWN's tone (49,51,61). The blue cast is the
911 -- point: multiply can only darken, so neutralising a warm brown into a cool
912 -- near-grey pulls red hardest.
913 -- Then `ally_glow` is added on top exactly as it is for an ally pawn, and the
914 -- horse ends at (195,199,217) against the ally pawn's (195,203,217) — a 4/255
915 -- difference in one channel, i.e. the same white.
916 -- ⚠ Adding ally_glow to the RAW horse instead gives (255,253,235): a warm
917 -- cream that blows out to near-white and never matched the allies. That is the
918 -- bug this multiply exists to fix — the neutralise has to happen first.
919 -- ⚠ Recompute both numbers if either sprite is ever replaced.
... [15 more lines]

I'm thinking through the color palette for the sign post — it should be a named color that fits with the existing material vocabulary. Real galvanized steel posts are a mid-grey, and I could either reuse the existing `board_side` color or define a new `sign_post` with a slightly darker grey tone to distinguish it while keeping it in the same family.…

17:489:-- The OUTLINE-ONLY channel, pointed at the frost layer. `outline_only.frag`
20:495:emoji_set_icon_channels({ outline_only = frost_layer })
40:9065:-- The answer is `outline_only.frag`, which emits black ONLY where a pixel is
41:9067:--   1. the cube goes into `emoji_ring_layer` (the outline_only channel) at FULL
44:9123:                  -- having transparent pixels between them, so outline_only finds
45:9137:                    -- transparent pixels between them — so outline_only finds no
66:10198:  -- outline_only source it derives its rim from. camera_attach is a queue-time

(Bash completed with no output)

3278:  layer_push(game_layer, cx, cy - PAWN_PX - 9 + bob, 0, s, s)
3279:  layer_image(game_layer, comet_img, 0, 0)
3280:  layer_pop(game_layer)
3586:      layer_push(game_layer, c.x, c.y + 3 - c.z, 0, s, s)
3587:      layer_image(game_layer, coin_img, 0, 0)
3588:      layer_pop(game_layer)
3775:  layer_push(game_layer, wall.x + wall.bump_x, wall.y - wall.z, 0, s, s)
3776:  layer_image(game_layer, wall_img, 0, 0, nil, wall.flashing and white() or nil)
---
anchor/animation.lua:14:    layer_spritesheet(game_layer, self.anim.spritesheet, self.anim.frame, x, y)
anchor/camera.lua:11:    camera_attach(main_camera, game_layer)
anchor/camera.lua:12:    layer_circle(game_layer, 100, 100, 20, red())
anchor/camera.lua:13:    -- ... more draws to game_layer
anchor/camera.lua:14:    camera_detach(main_camera, game_layer)
anchor/color.lua:13:    layer_circle(game_layer, x, y, r, red())  -- __call returns packed rgba integer
anchor/font.lua:6:    layer_text(game_layer, "Hello", fonts.main, 100, 50, color)
anchor/image.lua:6:    layer_image(game_layer, images.player, 100, 100)
anchor/layer.lua:9:    game_layer = layer_new('game')
anchor/layer.lua:10:    layer_rectangle(game_layer, 100, 100, 50, 30, color)

488:ui_popup_panel_layer, ui_popup_content_layer = ui3_panel_layer, ui3_content_layer

455    -- silhouette with black (not just the rim — the interior too), and the content
456   -- layer normally hides that because its sprites are OPAQUE. A TRANSLUCENT draw
457   -- on an outlined layer therefore composites over a solid black copy of itself
458   -- and goes murky. The Frozen ice cube is the game's only translucent board
459   -- object, so it gets its own plain layer, above the pieces.
460   { 'frost' },                            -- 🧊 the Frozen block (translucent — see above)
461   { 'fire',    outline = true },          -- Fire's ember particles (outlined, IN FRONT of the pieces)
462   { 'effects', outline = true },
463   -- A SECOND effects layer, board-space, composited above the first. `effects`
464   -- draws its contents in one insertion-ordered queue, so anything that has to
465   -- sit over a specific thing already on it can only rely on having been created
466   -- later — fine by accident, fragile on purpose. This layer is the explicit
467   -- version of that: put a draw here and it is above everything on `effects`,
468   -- whatever order it was made in. Camera-attached alongside effects in draw().
469   { 'effects_2', outline = true },
470   { 'ui',      outline = true },          -- game HUD (tray, hearts, text)
471   { 'overlay' },                          -- dev-overlay backdrop (F3 tuner)
472 }
473 -- the UI toolkit tier stack — generated, never hand-declared (see THE TIER
474 -- LAW above the emoji_layers block)
475 for i = 1, UI_TIERS do
476   LAYERS[#LAYERS + 1] = { ('ui%d_panel'):format(i),   outline = true }
477   LAYERS[#LAYERS + 1] = { ('ui%d_content'):format(i), outline = true }
478 end
479 LAYERS[#LAYERS + 1] = { 'cursor', outline = true }
480 emoji_layers(LAYERS)
481 
482 -- Legacy tier layer names — aliases of the numbered stack (the SAME layer
483 -- objects, not copies), so every existing direct reference keeps working:
484 -- glossary/ready-gate/banners on ui_top_content_layer, badges on
... [15 more lines]

435  -- above its WHOLE panel layer — so within one tier, a frame's BODY can never
436 -- cover another frame's content, whatever the draw order. Symptom: a tooltip
437 -- with a button's label bleeding through it, a card that can't cover icons.
438 -- THE LAW: a UI frame drawn over another UI frame goes on a HIGHER TIER —
439 -- later draw order can never fix it. The stack is NUMBERED (ui1..uiN) so "one
440 -- tier above" ALWAYS exists; the legacy names are aliases (base=1, top=2,
441 -- popup=3) and everything higher is spare nesting room. ui_tooltip auto-rides
442 -- one tier above its widget, so tooltips can't get this wrong. Out of tiers?
443 -- Raise UI_TIERS below — that is the entire procedure. Resolution + the same
444 -- law live in emoji/ui/paint.lua (the chokepoint every widget draw routes
445 -- through); do NOT hand-declare ui_*_panel/content pairs again.
446 UI_TIERS = 5
447 
448 local LAYERS = {
449   { 'bg' },
450   { 'slab',    outline = true },
451   { 'board',   outline = true },
452   { 'deco' },
453   { 'game',    outline = true },
454   -- ⚠ NOT outlined, and that is the whole point: outline.frag fills the entire
455   -- silhouette with black (not just the rim — the interior too), and the content
456   -- layer normally hides that because its sprites are OPAQUE. A TRANSLUCENT draw

The game layer has an outline applied, so anything rendered there will have a black border that makes it stand out against both light and dark backgrounds. Now I'm ready to write up the design brief and work through the key decisions, starting with whether the Stop Sign mechanic should change from its current behavior of pushing the pawn back one row.

Reading the description more carefully — "blocks the pawn like the barricade does (same effects on both ends) then disappears" — the parenthetical about effects and the visual sequence described (appear, block, disappear) plus the sound follow-up suggest this is presentation-only. The push-back mechanic should stay, which keeps the Force interactions intact and doesn't break the existing test fixtures. I'll flag this as an assumption and note it prominently since it's a one-line change if I'm wrong, but it sits right on the boundary of what needs clarification per the design guidelines.

For the telegraph beat question: the sign appears one beat before it blocks, so I need to identify which pawns qualify — those at the bottom row after the current beat's movement that would actually advance next beat and aren't already netted, friendly, or held by a barricade.

The barricade check happens during the walk phase itself, so if a barricade blocks the column, the pawn never reaches the escape condition and the sign shouldn't appear there. `piece_advance_dir` already accounts for frozen and stunned pieces, plus slow cadence effects. But I need to be careful about the timing: when I call `piece_advance_dir` at the end of beat N, stun has already been decremented, so I'm checking whether the piece will actually move next beat with the current stun value.

The key insight is that the telegraph is cosmetic and self-correcting — if it mispredicts, the worst case is a sign that flashes for one beat and then disappears, which is harmless.

To handle the edge case where a save happens without a sign, I should spawn one on the spot as a fallback. The signs themselves live in a table keyed by column, tracking position, animation state, and a timer. When a pawn gets saved in that column, the sign gets removed with a block effect; otherwise it fades out quietly after one beat. This ensures we never have two signs in the same column.

Now for the lifecycle: stop_signs must be cleared during reset alongside the wall, and critically, they're pure visual — they can't touch simulation or replay determinism. Since they spawn from a prediction, I need to make sure that prediction doesn't read any RNG, and nothing in the sim should ever query the signs table for occupancy. It's purely decorative. For drawing, I'm creating a new function that renders the pole as a rectangle extending from below the head down past the goal height, with the sign image itself positioned at the top.

I need to be careful with coordinate systems — the sign image draws centered at its position while the pole rectangle uses top-left anchoring, so the pole's x needs to be offset by half its width and the y starts at the head's center. The pole extends downward, and when the spring thump animates, both the head and pole should scale together from the head's center point to make the whole sign wobble as one unit.

To prevent the pole from disappearing into the screen at peak scale, I'll make sure it's long enough that even at 0.8 scale it still reaches the bottom. For the sound effects, I'm replacing the block impact with a dedicated wall block sound and the appearance with a wall place sound.

Since multiple pawns can be blocked in the same beat, I need to gate both sounds with a per-beat flag to avoid stacking multiple plays. The wall place sound is currently an ending slot with no clip, so it's silent, but I'll include it anyway and flag it once per beat so multiple signs don't trigger it repeatedly.

For the F7 lab scenario, I should drop 2-3 pawns in different columns like `{2, 5, 7}` to demonstrate multiple signs appearing simultaneously without overlap. I also need to add `goal_net` to the sound-slot table with entries for both wall_place and wall_block sounds, and update the code-section map to reference the goal_net functions.

Let me verify the particle effect signatures — `emoji_puff` takes position, image, count, and velocity/distance ranges, while `spawn_emoji_particle` uses a simpler opts table, and camera shake uses `shake_trauma` with intensity and duration parameters.

Now I'm thinking through the draw order: signs and walls occupy the same margin strip, but they're mutually exclusive by design since a wall blocks a column and prevents pawns from spawning signs there. For the pawn interaction, the Stop Sign pushes upward while the barricade bumps downward, so I should give the pawn the same lunge animation in both cases.

Actually, wait — the sign end already gets the full barricade treatment with flash and spring effects, but the pawn end is being pushed back, which means it's already sliding upward. Adding a downward bump would conflict with that slide. So the pawn keeps its existing push presentation, and if the mechanic changes later, I'll add the bump then. The key is timing: the sign should flash and shake at contact, and the pawn's push-back should start from that same frame.

Now I need to declare the constants for the stop sign — head size, pole width, pole color, and head offset — following the naming conventions used elsewhere. For the functions, I'm debating whether to use `goal_net_*` (matching the item id) or `stop_sign_*` (matching the item…

The user confirmed to proceed with the default behavior, so I'll keep the push-back mechanic as is. Now I'm identifying the specific code sections I need to modify: the wall reset points, the march_pawns ending where I'll hook the scan and clear logic, the goal_net_save function, and the draw call.…

2818 -- -----------------------------------------------------------------------------
2819    -- seed: live play passes nil (a fresh seed is drawn and recorded); playback
2820    -- passes the recorded seed so grng reproduces every gameplay roll.
2821    -- `opts.no_dev_items` suppresses the DEBUG_START_ITEMS grant below — playback
2822    -- must start from an empty strip, whatever the dev list says.
2823    function reset(seed, opts)
2824      pawns            = {}
2825      ponies           = {}
2826      wall             = nil
2827      cloud            = nil
2828      cat              = nil    -- 🐈 Force summon
2829      tornado          = nil    -- 🌪️ Force summon (8 beats, then it blows out)
2830      push_depth       = 0
2831      comet_mark       = nil
2832      coins            = {}
2833      skulls           = {}
2834      strike_buffered  = false   -- (knight.strike/.airborne come free: the knight table is rebuilt below)
2835      spawns_on        = (spawns_on ~= false)   -- dev flood switch (N) survives a restart
2836      coin_beats       = 0
2837      coffee_last_ms   = -100000
2838      combo_count, combo_timer, combo_shake_t = 0, 0, 0
2839      combo_sim_n, combo_sim_ms = 0, -100000

2940   -- board; a Transform's remaining moves and every item counter are run state)
2941      pawns, ponies, skulls, coins = {}, {}, {}, {}
2942      captured_pending = {}
2943      skull_land_queue = {}          -- a landing in flight dies with the old board
2944      fires, fire_vis, fire_emit_t = {}, {}, 0
2945      comet_mark = nil
2946      cloud, wall = nil, nil
2947      cat, tornado = nil, nil        -- the tornado is temporary; the cat re-summons below
2948      push_depth = 0
2949      march_freeze, freeze_held, freeze_flavor = 0, false, 'ice'
2950      revived_this_beat, angel_hold = false, false
2951      strike_buffered = false
2952      combo_count, combo_timer, combo_shake_t = 0, 0, 0
2953      combo_sim_n, combo_sim_ms = 0, -100000
2954      coin_beats = 0
2955      -- the knight KEEPS HIS SQUARE between sessions (owner, 2026-08-01) — only

1000 -- -----------------------------------------------------------------------------
1001    -- run state
1002    -- -----------------------------------------------------------------------------
1003    game_timer = timer_new()
1004    
1005    knight            = nil
1006    pawns             = {}
1007    ponies            = {}    -- Pony's hunting friendly knights (a separate entity list)
1008    wall              = nil   -- Wall's blocker: stands OFF-BOARD under one column, never dies
1009    cloud             = nil   -- Cloud's storm: drifts over its mark and bolts it, never dies
1010    coins             = {}    -- Coin's pickups: lie where they land, block the march, never expire
1011    coin_beats        = 0     -- beats left of the triple-score buff
1012    -- Coffee. coffee_last_ms is the LOGIC (a canonical event stamp — see sim_now_ms);
1013    -- combo_count/combo_timer are DISPLAY ONLY and never feed back into the sim.
1014    COFFEE_WINDOW     = 2.5   -- seconds since the last capture before the streak lapses
1015    COFFEE_WINDOW_MS  = 2500
1016    coffee_last_ms    = -100000
1017    -- the SIM-side Combo (see resolve_capture): counts every capture whether or not

780  -- with a light debuff at the moment the board is cleansed.
781 sound_declare('revive',        'assets/sounds/revive_magic.ogg')
782 sound_declare('angel_buff',    'assets/sounds/angel_buff.ogg')
783 sound_declare('angel_debuff',  'assets/sounds/angel_debuff.ogg')
784 -- Barricade: the bang as a pawn runs into it (soundeffect-lab, already ogg — copied
785 -- rather than transcoded, so it keeps the original encode).
786 sound_declare('wall_block',  'assets/sounds/wall_block.ogg')
787 
788 volumes.dash    = 0.43
789 volumes.hop     = 0.50
790 volumes.landing = 0.40
791 volumes.footstep = 0.50
792 volumes.march   = 0.35
793 volumes.illegal = 0.50

I notice that `sounds.wall_place` isn't actually defined anywhere, so calling it would be a harmless no-op. Now I'm planning the edits to main.lua: I need to add a `stop_signs` table in the run state section, create a `sign_post` color definition, and then add the Stop Sign section right after the Wall drawing code.…

Exit code 2
grep: main.lua: No such file or directory

4890:    if n > 1 and not push_shake_done then
4891:      push_shake_done = true
5145:push_sfx_done   = false
5146:push_shake_done = false   -- ...and the camera, gated the same way (push_slide_vfx)
5148:  if push_sfx_done then return end
5149:  push_sfx_done = true
5560:  push_sfx_done, push_shake_done = false, false
5986:  push_sfx_done, push_shake_done = false, false       -- ...and this move's shove sound + camera are unspent

5548   -- the same sample over itself.
5549      if exit_any then sfx(sounds.hole, volumes.hole*0.5) end
5550    end
5551    
5552    function march_pawns()
5553      -- the chunk clock: beats drive the director, and both live play and playback
5554      -- run this from the same 'm' events, so chunk boundaries (and the grng draws
5555      -- of each chunk's plan build) land identically in both
5556      beat_count = beat_count + 1
5557      -- the beat is its own event: Goal Net's save and the beat-keyed pushers (Wave,
5558      -- Chequered Flag) shove here, and they get their own single play rather than
5559      -- inheriting whatever the last knight move spent
5560      push_sfx_done, push_shake_done = false, false
5561      chunk_tick()
5562      claims_clear()   -- wipe last beat's damage claims; the march_beat handlers at the
5563                       -- bottom of this function re-assert whatever is still pending
5564      -- session mode: scheduled drops land inside the recorded beat, exactly like
5565      -- the chunk plan's own payout (grng order stays stream-stable)
5566      if session_on() then session_drop_tick() end
5567      -- the comet lands FIRST, before anything moves — that's what makes its mark honest,
5568      -- and it clears the pawn before the barricade re-plans around it
5569      if items_enabled then comet_resolve() end
5570      revived_this_beat = false   -- fresh beat: the angel's blanket protection is per-beat
5571      if coin_beats > 0 then coin_beats = coin_beats - 1 end   -- the triple-score window burns down
5572      wall_march()   -- the blocker repositions FIRST, so it can catch this beat's leaks
5573                     -- (and it keeps shuffling even while the pawns are frozen)
5574      -- coins age by the beat (frozen beats included) and expire after
5575      -- COIN_LIFE_BEATS + 1: the last counted beat is the blink-out (draw-side).
5576      -- Deterministic — a pure beat counter, no roll. Silent despawn (small puff).
5577      for j = #coins, 1, -1 do

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

I'm realizing there's a positioning issue with how the post and head are being drawn relative to the layer transform. The post rectangle is offset at the local origin while the head image is centered at (0,0), so I need to figure out how their coordinate systems actually align when the layer scale is applied. I'm realizing the post width is defined in local image-pixel units, but I need it in screen pixels. Since the scale factor converts image pixels to screen pixels, a 3-unit post width becomes way too thin on screen. I need to recalculate the post width in screen-pixel units instead.

I'm restructuring the code to define both post dimensions in screen pixels and then divide by the scale factor to convert back to local units for the layer drawing. This keeps everything consistent and ensures the post renders at the right size while still moving with the spring animation. Ah, I see it now — by dividing both height and width by the spring scale, the post becomes completely rigid in screen space while only the head springs upward. The post's length and width stay constant regardless of the spring animation, which is exactly what I want: a planted post with a bouncy head on top. Let me update the code to reflect this and verify the head doesn't overlap the post's top edge.

Now checking the geometry: the head is centered at s.y and spans 10 pixels above and below, so it covers s.y-10 to s.y+10. The post starts at s.y and extends downward, meaning the top 10 pixels of the post sit behind the head. Looking at the actual screen coordinates, the post runs from y=251 to 282, with the screen bottom at 270, leaving about 9 pixels of visible post below the head. The slab bottom is at 263, so the post crosses both the board and background layers, while the octagon head mostly sits on the board squares' bottom edge.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

I'm realizing the sweep placement affects how long signs stay visible. If I sweep at the top of a beat, signs planted at the end of the previous beat survive through the current beat and get cleared at the next beat's start—that's two beats of visibility instead of one. I need to map out the exact timeline: a sign should appear on beat N when the telegraph triggers, the pawn collides with it on beat N+1, and it should vanish immediately after that collision.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

4665:function force_summons()
8755:    timer_update(wall.timer, sdt)
8756:    spring_update(wall.spring, sdt)
8757:    update_hop(wall, sdt)
8762:  for _, e in ipairs(force_summons()) do

8735                        knight.y - KNIGHT_PX*0.42 - knight.z + knight.bump_y, knight_img, s)
8736        end
8737      end
8738      for _, p in ipairs(pawns) do
8739        timer_update(p.timer, sdt)
8740        spring_update(p.spring, sdt)
8741        if p.stone_t and p.stone_t < ROCK_FALL_DUR then p.stone_t = p.stone_t + sdt end
8742        update_hop(p, sdt)
8743      end
8744      for _, py in ipairs(ponies) do   -- Pony hunters animate like the knight
8745        timer_update(py.timer, sdt)
8746        spring_update(py.spring, sdt)
8747        update_hop(py, sdt)
8748      end
8749      for _, s in ipairs(skulls) do    -- KVP4 hazards: hop down the board like pawns
8750        timer_update(s.timer, sdt)
8751        spring_update(s.spring, sdt)
8752        update_hop(s, sdt)
8753      end
8754      if wall then                     -- the off-board blocker shuffles + thumps
8755        timer_update(wall.timer, sdt)
8756        spring_update(wall.spring, sdt)
8757        update_hop(wall, sdt)
8758      end
8759      update_cloud(sdt)                -- the storm drifts toward its mark
8760      -- the Force summons hop like pieces. ⚠ NOT ipairs{cat, tornado}: either can
8761      -- be nil, and a nil hole ends the iteration silently.
8762      for _, e in ipairs(force_summons()) do
8763        timer_update(e.timer, sdt)
8764        spring_update(e.spring, sdt)
... [15 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

Looking at the F7 lab changes needed for the `goal_net` scenario—I need to add multi-column support, sound slots, a code-section map entry, and FX_NOTES. I'm examining the `defense` template's 'leak' branch to understand how to implement the multi-column structure, which currently handles shield recharging and applies visual effects before restoring health.

For the goal_net scenario, I'll modify the column logic to support multiple columns (like `{1, 4, 6}`) where pawns spawn and march down. The timing works out so a pawn placed at row 6 reaches row 7 at the end of a beat, triggering the telegraph plant, then leaks and gets saved on the next beat. Since the save sets `p.netted` to true, the `stop_sign_scan` check prevents a second sign from planting when the pawn marches down again. The health restoration happens after the leak, so pawns that escape the net and leak for real will have their HP restored by the `fx_after` callback.…

1534   combo_kick      = 'The meter tick: 0.2 spring + random tilt; jitter amp/dur grow with combo_count, capped 3.5/0.28.',
1535      update_combo    = 'The decay: combo_timer runs down, zero resets the count. The drawing is draw_combo_meter (tilted coffee + count at the horse\'s head).',
1536      spawn_coin      = 'The fling: coin_throw fires on the THROW (slot still empty - drop a file), coin arcs COIN_ARC over COIN_FLIGHT, spin 16; reveal on landing = coin_collect chime + 6-coin burst + 0.7 spring.',
1537      collect_coin    = 'The buff opening: coin_collect + coin_buff layered, 12-coin burst, the coin flung off as a dying piece, 0.4/0.2 shake.',
1538      angel_sequence  = 'The 4-phase cutscene (unscaled clock): 0s punch-zoom 1.5x + the death echo WITHOUT dying; 0.5s revive clip + rising stars ramping 4->29/s; 1.5s zoom-out + 30 screen angels; 2.5s angel_cleanse.',
1539      angel_cleanse   = 'The discharge: buff + debuff layered, 1.5/0.75 trauma (the game\'s biggest), 16 star/angel burst, every held enemy dissolves via angel_burst.',
1540      angel_burst     = 'One enemy dissolving: white hit-flash, 5 stars, a tinted corpse. No number and no score - a rescue, not a harvest.',
1541      hole_swallow_vfx = 'The swallow: hole clip, the pit opens OFF-BOARD in the Barricade margin strip under the leaking column, the pawn falls from its square into it, 5 low black droplets, 0.25/0.12 shake. Deliberately no damage number - a Hole deals none.',
1542      spawn_wall      = 'Placement: the best-scored column, wall_place clip (slot still empty - drop a file), 8-sign puff, 0.6 spring.',
1543      wall_march      = 'The shuffle: one column per beat toward wall_target on a heavy WALL_HOP_H/DUR hop; never abandons a pawn it is holding.',
1544      wall_block      = 'The stop: FIRST impact per pawn = wall_block clip + 5 chips flung up + 0.3/0.15 shake + 0.4 spring; after that it leans quietly (0.14).',
1545      shield_absorb   = 'The Block: the badge FALLS OFF its heart (spun + flung on the HUD layer), shield_block clip, sideways nope-jolt 7, hearts flash.',
1546      shield_recharge = 'Back up after 20 captures: shield_up clip, hearts pop 0.3, icon pulse.',
1547      spawn_hit_number = 'THE blue number: the swing\'s FULL damage over the victim\'s head. Every hit in the game funnels through here.',
1548      capture_accents = 'The conditional-damage accents, LAYERED on the chord: ice_shatter_kill on Frozen kills, hammer_tank on tank kills, gi_accent on Stunned kills, opal_light on light squares. Nil-safe until clips land.',
1549      strike_impact   = 'One strike hit: victim flash + 0.22 spring, Stun applied (STUN_BEATS + Web), the horse reacts AT CONTACT (0.5 spring + flash), capture_impact + the Gi accent, 0.3/0.14 shake.',
1550      draw_frost_cube = 'The Frozen block: the ice emoji drawn OVER the pawn at ICE_ALPHA with its own outline rim, ICE_STRETCH taller than wide, seated ICE_DY down.',
1551      broom_sweep     = 'The sweep, riding the landing delay: one broom per doomed skull swings over it, and the skulls burst as SKULLS at BROOM_OUT. Two audio beats - broom_sweep clip + icon pulse + 0.3/0.15 shake on the stroke, the broom_hit trigger on the impact (once per sweep, never per skull).',
1552      skull_destroy   = 'Any skull death: the corpse flings off + a WIDE 12-particle puff at 130-300 px/s. Deliberately star-less - a hazard is never a reward.',
1553      helmet_block    = 'The Block: helmet_block clip (falls back to shield_block), 10-helmet star-less puff, hearts flash + pop, horse flash + sideways jolt 7, 0.45/0.2 shake.',
1554    }
1555    
1556    local FX_SRC = 'main.lua'    -- every registered span lives here
1557    local fx_src_cache = nil
1558    
1559    local function fx_src_lines(force)
1560      if fx_src_cache and not force then return fx_src_cache end
1561      local lines = {}

840    coin           = { { key = 'coin_throw', label = 'the throw', pending = true },
841                      { key = 'coin_collect1', label = 'collect' },
842                      { key = 'coin_buff', label = 'the buff' } },
843   guardian_angel = { { key = 'revive', label = 'the charge' },
844                      { key = 'angel_buff', label = 'the cleanse' },
845                      { key = 'angel_debuff', label = 'cleanse (low)' } },
846   hole           = { { key = 'hole', label = 'the swallow' } },
847   wall           = { { key = 'wall_place', label = 'placement', pending = true },
848                      { key = 'wall_block', label = 'the block' } },
849   growing_heart  = { { key = 'heal1', label = 'the heal' } },
850   hourglass      = { { key = 'stone_form1', label = 'the petrify' },
851                      { key = 'stone_break1', label = 'the crumble' } },
852   shield         = { { key = 'shield_block1', label = 'the block' },
853                      { key = 'shield_up1', label = 'recharge' } },

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: driving 4 scenarios
fxsmoke: ======== REPORT ========
fxsmoke: no errors
fxsmoke: 2 scored nothing (check these by eye): wall, shield
fxsmoke: ========================

`goal_net` wasn't in the "scored nothing" list, so it's generating pushes as expected. I'm verifying that `wall` and `shield` were already in that list from the earlier run, which they were, so there's no regression from my changes.…

43:require('verify')  -- headless replay-determinism harness (inert unless --verify)
2707:-- fed straight to --verify=check --files=replays/<file>.
8659:verify_boot()   -- --verify=gen|check|both: takes over the run loop; no-op otherwise
-- -----------------------------------------------------------------------------
-- verify.lua — headless replay-determinism harness
--
-- The question this answers: does a recorded KVP3 log re-derive the SAME run on
-- playback, for every item in the catalog? Every gameplay roll happens on the
-- seeded `grng` inside a recorded handler, so it should — but the 2026-07-20/21
-- item batch added roll sites in the highest-traffic paths (pawn_spawned,
-- resolve_capture, the leaked loop, march_beat) and the grng SEQUENCE is what
-- actually has to match. This sweeps that empirically instead of by inspection.
--
-- Two phases:
--   gen   — a bot plays N runs (seeds seed0..seed0+N-1) and writes each sealed
--           KVP3 string + an expectation line to verify/run_<seed>.txt.
--   check — each file is replayed and the outcome compared against the
--           expectation. Any divergence in the grng sequence changes which
--           pawns get captured, so score/items/hp/duration is a near-total
--           oracle for "the run re-derived".
--
-- Usage (from the game dir):
--   anchor.exe . --headless --verify=sweep --seed0=100          -- 30 single-item runs + 4 full-catalog
--   anchor.exe . --headless --verify=both  --seeds=40 --seed0=1 -- drop-driven, realistic play
--   anchor.exe . --headless --verify=both  --seeds=30 --items=coin,comet,hole   -- targeted
--   anchor.exe . --headless --verify=check --files=replay_last.txt              -- a run YOU played
--   --allruns=N   how many full-catalog runs a sweep appends (default 4)
-- Drop --headless to watch the bot play in a window (slow — realtime).
--
-- A run ends either by DEATH (weak runs) or by TRUNCATION at VERIFY_PLAY_BUDGET.
... [13 more lines]

8:67:  local dir   = a.dir or VERIFY_DIR_DEFAULT
9:69:  if a.files then                          -- explicit files: check only, no generation
10:70:    for f in tostring(a.files):gmatch('[^,]+') do jobs[#jobs + 1] = { file = f } end

55   function verify_boot()
56    local a = engine_args or {}
57    local mode = a.verify
58    if not mode then return end
59    if mode == 'true' then mode = 'both' end
60    if mode ~= 'gen' and mode ~= 'check' and mode ~= 'both' and mode ~= 'sweep' then
61      print('verify: unknown mode "' .. tostring(mode) .. '" (want gen | check | both | sweep)')
62      return
63    end
64  
65    local n     = tonumber(a.seeds) or VERIFY_SEEDS_DEFAULT
66    local seed0 = tonumber(a.seed0) or 1
67    local dir   = a.dir or VERIFY_DIR_DEFAULT
68    local jobs  = {}
69    if a.files then                          -- explicit files: check only, no generation
70      for f in tostring(a.files):gmatch('[^,]+') do jobs[#jobs + 1] = { file = f } end
71      mode = 'check'
72    elseif mode == 'sweep' then
73      -- One run per item, each pre-granting exactly that item, so every item's roll
74      -- sites are exercised and a failure is ATTRIBUTABLE to it. Then a few runs
75      -- owning the whole catalog, which is where the interactions live. Drop-driven
76      -- coverage can't do this: owning N items costs N(N+3) captures (990 for all
77      -- 30) and 8 of them are weight-1 rares.
78      local all = {}
79      for _, id in ipairs(ITEM_ORDER) do all[#all + 1] = id end
80      for i, id in ipairs(ITEM_ORDER) do
81        jobs[#jobs + 1] = { seed = seed0 + i - 1, pre = { id } }
82      end
83      for i = 1, (tonumber(a.allruns) or 4) do
84        jobs[#jobs + 1] = { seed = seed0 + #ITEM_ORDER + i - 1, pre = all }
... [30 more lines]

I need to figure out which…

verify/run_1030.txt,verify/run_700.txt,verify/run_701.txt,verify/run_702.txt,verify/run_703.txt,verify/run_704.txt,verify/run_705.txt,verify/run_750.txt,verify/run_751.txt,verify/run_752.txt,verify/run_753.txt,verify/run_760.txt,verify/run_761.txt,verify/run_852.txt,verify/run_860.txt,verify/run_900.txt

replay check: score 157 vs recorded 182 — DESYNC
  -> FAIL  verify/run_753.txt  (score 157~=182, items [balloon,banana_peel,brick,cat,chequered_flag,chick,coffin,curling_stone,dizzy,eight_ball,gi,glove,goal_net,hammer,iron_arm,link,locomotive,magnet,muscle,shield,subwoofer,sword,tornado,turtle,wall,wave]~=[balloon,banana_peel,boom,brick,cat,chains,chequered_flag,cloud,coffee,coffin,coin,curling_stone,dagger,dizzy,egg,eight_ball,gi,glove,goal_net,heart,iron_arm,lightning,link,locomotive,magnet,muscle,package,shield,steam,subwoofer,sword,tornado,turtle,wave], dur 174819ms~=183211ms)
verify: [check 12/14] verify/run_760.txt
grace: rolled a pawn back to 2,1
grace: rolled a pawn back to 3,5
replay check: score 166 vs recorded 269 — DESYNC
  -> FAIL  verify/run_760.txt  (score 166~=269, items [boom,brick,cloud,comet,dagger,egg,eight_ball,fire,helmet,loaded_dice,magnet,old_clock,rocket,seedling,snow]~=[boom,castle,cloud,coffin,comet,dagger,dizzy,glove,goal_net,golden_heart,hammer,iron_arm,meat,oni,shield,slot_machine,snow,wall,web], hp 0~=2)
verify: [check 13/14] verify/run_761.txt
grace: rolled a pawn back to 5,0
replay check: score 69 vs recorded 184 — DESYNC
  -> FAIL  verify/run_761.txt  (score 69~=184, items [chains,cloud,coffee,coffin,coin,comet,dagger,fire,iron_arm,snow]~=[boom,broom,chains,cloud,coffee,comet,dagger,dynamite,fire,glove,goal_net,meat,muscle,snow,tooth,turtle,wall], dur 117616ms~=198635ms)
  -> FAIL  verify/  (missing file (run --verify=gen first))

verify: ============ REPORT ============
replays: 1/14 passed
  FAIL verify/run_1030.txt — DESYNC — events exhausted, run did not end
  FAIL verify/run_700.txt — score 135~=145, items [abacus,balloon,banana_peel,brick,cat,chequered_flag,cloud,coffee,coffin,coin,curling_stone,dizzy,eight_ball,glove,goal_net,guardian_angel,hammer,hole,ice_cube,iron_arm,locomotive,muscle,rocket,snow,steam,subwoofer,sword,tornado,turtle,wall,wave]~=[abacus,balloon,banana_peel,brick,cat,chains,chequered_flag,cloud,coffee,coffin,coin,curling_stone,dizzy,eight_ball,glove,goal_net,guardian_angel,hole,iron_arm,locomotive,magnet,meat,muscle,opal,snow,steam,subwoofer,sword,tornado,turtle,wall,wave], dur 165338ms~=176405ms
  FAIL verify/run_701.txt — score 175~=193, items [balloon,banana_peel,brick,cat,chequered_flag,coffin,curling_stone,dizzy,eight_ball,glove,goal_net,iron_arm,link,locomotive,muscle,old_clock,seedling,slot_machine,snow,subwoofer,thread,tornado,wave]~=[abacus,balloon,banana_peel,brick,cat,chequered_flag,coffin,curling_stone,dagger,dizzy,egg,eight_ball,glove,goal_net,iron_arm,link,locomotive,muscle,oni,pillar,seedling,shield,slot_machine,subwoofer,thunderbolt,tornado,turtle,wave], dur 188512ms~=196354ms
  FAIL verify/run_702.txt — DESYNC — events exhausted, run did not end
  FAIL verify/run_703.txt — score 271~=273, items [balloon,banana_peel,brick,cat,chequered_flag,cloud,coffee,coffin,curling_stone,dagger,dizzy,eight_ball,glove,goal_net,growing_heart,hole,iron_arm,link,loaded_dice,locomotive,muscle,snow,subwoofer,tornado,wave]~=[balloon,banana_peel,brick,cat,chequered_flag,chick,cloud,coffee,coffin,comet,conductor,curling_stone,dizzy,egg,eight_ball,fire,glove,goal_net,hammer,heart,hole,hourglass,iron_arm,link,locomotive,magnet,muscle,snow,subwoofer,tornado,wall,wave,web]
  FAIL verify/run_705.txt — DESYNC — events exhausted, run did not end
  FAIL verify/run_750.txt — DESYNC — events exhausted, run did not end
  FAIL verify/run_751.txt — DESYNC — events exhausted, run did not end
  FAIL verify/run_752.txt — score 88~=186, items [balloon,banana_peel,brick,cat,chequered_flag,coffin,comet,curling_stone,dizzy,eight_ball,gi,glove,goal_net,iron_arm,locomotive,muscle,seedling,subwoofer,tornado,wave]~=[balloon,banana_peel,brick,broom,cat,chequered_flag,coffin,curling_stone,dizzy,egg,eight_ball,glove,goal_net,hammer,heart,helmet,iron_arm,lightning,link,locomotive,muscle,package,pillar,subwoofer,sword,tooth,tornado,turtle,wall,wave], dur 130998ms~=196597ms
  FAIL verify/run_753.txt — score 157~=182, items [balloon,banana_peel,brick,cat,chequered_flag,chick,coffin,curling_stone,dizzy,eight_ball,gi,glove,goal_net,hammer,iron_arm,link,locomotive,magnet,muscle,shield,subwoofer,sword,tornado,turtle,wall,wave]~=[balloon,banana_peel,boom,brick,cat,chains,chequered_flag,cloud,coffee,coffin,coin,curling_stone,dagger,dizzy,egg,eight_ball,gi,glove,goal_net,heart,iron_arm,lightning,link,locomotive,magnet,muscle,package,shield,steam,subwoofer,sword,tornado,turtle,wave], dur 174819ms~=183211ms
  FAIL verify/run_760.txt — score 166~=269, items [boom,brick,cloud,comet,dagger,egg,eight_ball,fire,helmet,loaded_dice,magnet,old_clock,rocket,seedling,snow]~=[boom,castle,cloud,coffin,comet,dagger,dizzy,glove,goal_net,golden_heart,hammer,iron_arm,meat,oni,shield,slot_machine,snow,wall,web], hp 0~=2
  FAIL verify/run_761.txt — score 69~=184, items [chains,cloud,coffee,coffin,coin,comet,dagger,fire,iron_arm,snow]~=[boom,broom,chains,cloud,coffee,comet,dagger,dynamite,fire,glove,goal_net,meat,muscle,snow,tooth,turtle,wall], dur 117616ms~=198635ms
  FAIL verify/ — missing file (run --verify=gen first)
verify: FAILURES (13 failures)
verify: ================================

Most of the test fixtures are failing, which could mean my changes broke things or the fixtures were already outdated. I need to establish a baseline by stashing my modifications to main.lua and running the tests again to see if the failures existed before my changes. The safest approach is to use git stash to temporarily set aside my work, run the tests, then restore my changes afterward.…

 M fx_done.lua
 M fx_lab.lua
 M main.lua
BACKED UP

 M fx_done.lua
replays: 2/6 passed
  FAIL verify/run_700.txt — score 135~=145, items [abacus,balloon,banana_peel,brick,cat,chequered_flag,cloud,coffee,coffin,coin,curling_stone,dizzy,eight_ball,glove,goal_net,guardian_angel,hammer,hole,ice_cube,iron_arm,locomotive,muscle,rocket,snow,steam,subwoofer,sword,tornado,turtle,wall,wave]~=[abacus,balloon,banana_peel,brick,cat,chains,chequered_flag,cloud,coffee,coffin,coin,curling_stone,dizzy,eight_ball,glove,goal_net,guardian_angel,hole,iron_arm,locomotive,magnet,meat,muscle,opal,snow,steam,subwoofer,sword,tornado,turtle,wall,wave], dur 165338ms~=176405ms
  FAIL verify/run_701.txt — score 175~=193, items [balloon,banana_peel,brick,cat,chequered_flag,coffin,curling_stone,dizzy,eight_ball,glove,goal_net,iron_arm,link,locomotive,muscle,old_clock,seedling,slot_machine,snow,subwoofer,thread,tornado,wave]~=[abacus,balloon,banana_peel,brick,cat,chequered_flag,coffin,curling_stone,dagger,dizzy,egg,eight_ball,glove,goal_net,iron_arm,link,locomotive,muscle,oni,pillar,seedling,shield,slot_machine,subwoofer,thunderbolt,tornado,turtle,wave], dur 188512ms~=196354ms
  FAIL verify/run_703.txt — score 271~=273, items [balloon,banana_peel,brick,cat,chequered_flag,cloud,coffee,coffin,curling_stone,dagger,dizzy,eight_ball,glove,goal_net,growing_heart,hole,iron_arm,link,loaded_dice,locomotive,muscle,snow,subwoofer,tornado,wave]~=[balloon,banana_peel,brick,cat,chequered_flag,chick,cloud,coffee,coffin,comet,conductor,curling_stone,dizzy,egg,eight_ball,fire,glove,goal_net,hammer,heart,hole,hourglass,iron_arm,link,locomotive,magnet,muscle,snow,subwoofer,tornado,wall,wave,web]
  FAIL verify/run_860.txt — score 86~=275, items [balloon,heart,helmet,hourglass,ice_cube,loaded_dice,magnet,snow,sword,web]~=[brick,chequered_flag,cloud,goal_net,heart,helmet,hourglass,ice_cube,lightning,link,loaded_dice,magnet,meat,muscle,shield,snow,sword,web], hp 0~=3
verify: FAILURES (4 failures)

The baseline is also failing on those same four test runs with identical score differences, which…

 M fx_done.lua
 M fx_lab.lua
 M main.lua
replays: 2/6 passed
  FAIL verify/run_700.txt — score 135~=145, items [abacus,balloon,banana_peel,brick,cat,chequered_flag,cloud,coffee,coffin,coin,curling_stone,dizzy,eight_ball,glove,goal_net,guardian_angel,hammer,hole,ice_cube,iron_arm,locomotive,muscle,rocket,snow,steam,subwoofer,sword,tornado,turtle,wall,wave]~=[abacus,balloon,banana_peel,brick,cat,chains,chequered_flag,cloud,coffee,coffin,coin,curling_stone,dizzy,eight_ball,glove,goal_net,guardian_angel,hole,iron_arm,locomotive,magnet,meat,muscle,opal,snow,steam,subwoofer,sword,tornado,turtle,wall,wave], dur 165338ms~=176405ms
  FAIL verify/run_701.txt — score 175~=193, items [balloon,banana_peel,brick,cat,chequered_flag,coffin,curling_stone,dizzy,eight_ball,glove,goal_net,iron_arm,link,locomotive,muscle,old_clock,seedling,slot_machine,snow,subwoofer,thread,tornado,wave]~=[abacus,balloon,banana_peel,brick,cat,chequered_flag,coffin,curling_stone,dagger,dizzy,egg,eight_ball,glove,goal_net,iron_arm,link,locomotive,muscle,oni,pillar,seedling,shield,slot_machine,subwoofer,thunderbolt,tornado,turtle,wave], dur 188512ms~=196354ms
  FAIL verify/run_703.txt — score 271~=273, items [balloon,banana_peel,brick,cat,chequered_flag,cloud,coffee,coffin,curling_stone,dagger,dizzy,eight_ball,glove,goal_net,growing_heart,hole,iron_arm,link,loaded_dice,locomotive,muscle,snow,subwoofer,tornado,wave]~=[balloon,banana_peel,brick,cat,chequered_flag,chick,cloud,coffee,coffin,comet,conductor,curling_stone,dizzy,egg,eight_ball,fire,glove,goal_net,hammer,heart,hole,hourglass,iron_arm,link,locomotive,magnet,muscle,snow,subwoofer,tornado,wall,wave,web]
  FAIL verify/run_860.txt — score 86~=275, items [balloon,heart,helmet,hourglass,ice_cube,loaded_dice,magnet,snow,sword,web]~=[brick,chequered_flag,cloud,goal_net,heart,helmet,hourglass,ice_cube,lightning,link,loaded_dice,magnet,meat,muscle,shield,snow,sword,web], hp 0~=3
verify: FAILURES (4 failures)

The results are identical to before—same pass/fail pattern with byte-exact diffs—so my change doesn't affect determinism. The fixture staleness is a pre-existing issue I should mention to the user but not fix. Now I'm running a fresh verification with both generation and checking enabled on a few seeds to confirm my change maintains self-consistent behavior.…

verify: mode=both jobs=8 dir=C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/vfy
verify: [gen 1/8] seed=9100 cadence=fast pre=goal_net,glove,brick,locomotive
verify: [gen 2/8] seed=9101 cadence=slow pre=goal_net,glove,brick,locomotive
verify: [gen 3/8] seed=9102 cadence=fast pre=goal_net,glove,brick,locomotive
verify: [gen 4/8] seed=9103 cadence=slow pre=goal_net,glove,brick,locomotive
verify: [gen 5/8] seed=9104 cadence=fast pre=goal_net,glove,brick,locomotive
verify: [gen 6/8] seed=9105 cadence=slow pre=goal_net,glove,brick,locomotive
verify: [gen 7/8] seed=9106 cadence=fast pre=goal_net,glove,brick,locomotive
verify: [gen 8/8] seed=9107 cadence=slow pre=goal_net,glove,brick,locomotive
verify: --- generation done, replaying ---
verify: [check 1/8] C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/vfy/run_9100.txt
verify: [check 2/8] C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/vfy/run_9101.txt
verify: [check 3/8] C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/vfy/run_9102.txt
verify: [check 4/8] C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/vfy/run_9103.txt
verify: [check 5/8] C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/vfy/run_9104.txt
verify: [check 6/8] C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/vfy/run_9105.txt
verify: [check 7/8] C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/vfy/run_9106.txt
verify: [check 8/8] C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/vfy/run_9107.txt
verify: ============ REPORT ============
replays: 8/8 passed

All tests are passing consistently across different game scenarios, so the determinism checks out. Now I need to visually verify that the drawing is rendering correctly—specifically checking if the stop sign displays as expected. I remember there's a `--render` mode that captures the game state to PNG without running it interactively, which would let me see exactly what's being drawn.…

-- -----------------------------------------------------------------------------
-- render.lua — offline deterministic capture of a saved replay (trailer footage)
--
-- The engine's `--render` mode is already the whole harness: a deterministic loop
-- (2 physics steps per rendered frame = 120Hz sim / 60Hz output), vsync off, and a
-- capture pass that runs in C right after draw() — compositing every layer to an
-- FBO and writing frame_%06d.png. So nothing here saves frames; calling
-- engine_render_setup(dir) once is what arms that pass.
--
-- Offline, NOT a screen capture: frames are produced as fast as the CPU allows and
-- each one is exactly 1/60s of sim, so the output can't drop frames or drift no
-- matter how slow the machine is. And because playback is a seeded replay, the take
-- is reproducible — pick a good run once, re-render it as often as you like.
--
-- Usage (from the game dir):
--   anchor.exe . --render --replay=replays/2026-07-22_1432_s412.txt --out=renders/a
--   --from=N      start capturing N seconds in (the sim still runs from 0)
--   --seconds=N   capture N seconds from the in-point
--   --audio-render=<path.wav>   the real mix, offline (engine flag, see anchor.c)
-- A marked moment (marks=... in an archived run's meta line) cuts as
--   --from=<mark - 4> --seconds=10
-- Then:
--   ffmpeg -framerate 60 -i renders/take1/frame_%06d.png \
--          -vf "scale=1920:1080:flags=neighbor" -c:v libx264 -preset fast -crf 18 \
--          -pix_fmt yuv420p take1.mp4
-- `flags=neighbor` is nearest-neighbour — it is what keeps the pixel art crisp
-- coming up from 480x270.
--
-- The replay file may be a bare KVP3 string or a verify/ run file (whose first
-- line is the KVP3 string and whose second is the expectation) — only line 1 is read.
... [15 more lines]

I'm trying to figure out the most efficient way to capture a frame with a stop sign visible. Rendering an entire verify run generates thousands of PNGs, which is wasteful. I could either render a short window from a run where I know a save happened, or add a debug hook to force a save at a specific point—though the latter adds unnecessary complexity. The verify run itself might be the smarter approach here.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

STOPSIGN t=42.61 gx=7
STOPSIGN t=83.31 gx=7
STOPSIGN t=86.71 gx=1
STOPSIGN t=89.26 gx=1
STOPSIGN t=98.71 gx=6

The signs are appearing at those timestamps, with two of them clustered close together around…

Loaded sound: assets/sounds/zap1.ogg (85767 bytes)
Loaded sound: assets/sounds/zap2.ogg (78662 bytes)
grace: rolled a pawn back to 7,0
Render capture setup: 480x270 -> C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/shot
render: armed at 86.20s
replay check: score 36 vs recorded 137 — DESYNC
render: done — 89.7s of sim captured
Shutting down...
209

There's a desync being reported by the render harness where the score diverged significantly (36 vs 137), which is puzzling since the simulation is event-driven from recorded events. The render mode runs at different frame rates (120Hz sim / 60Hz output) which could introduce dt-dependent divergences, but that shouldn't matter if everything's driven by the same recorded events.…

frame_000000.png
frame_000001.png
frame_000002.png
frame_000207.png
frame_000208.png

[
  {
    "type": "image",
    "note": "[image stored privately: vault/media/horse-game-16/001.png]"
  }
]

The board appears to be rendered with a perspective tilt or rotation effect, creating a parallelogram shape rather than a standard axis-aligned square. I notice a pawn in the bottom left area and no stop sign visible at the bottom. This visual style complicates how I'm thinking about positioning logic, since the wall position calculations assume a straight board but the actual rendering has this camera or rotation effect applied.…

[
  {
    "type": "image",
    "note": "[image stored privately: vault/media/horse-game-16/002.png]"
  }
]

The board's axis-aligned in frame 0, so frame 40's rotation is just a transient camera shake effect from the hit, not a structural layout issue. The board spans roughly x 120–360 and y 7–247, with the slab extending down to y 263. At frame 0 (t=86.20) there's no sign of the plant yet—it appears around t=86.71—so I'm checking the frames around 35 to see what's happening in between.

Frame 40 is tricky because the board itself is rotated from shake trauma, which makes it hard to read the positions. The plant triggers at 86.71 and the block around 87.5, so at frame 40 (t=86.87) we're in that window. There's an explosion visible on the right side (item icons show a burst), which explains the camera rotation. Looking at the bottom edge of frame 40, I can spot a white blob around (430, 185) that's outside the board's right margin, and a white/red shape at (160, 140) which is the knight. I'm trying to zoom in on the bottom strip across a few frames to see the stop sign more clearly, but I don't have image tools available to crop or magnify.…

[
  {
    "type": "image",
    "note": "[image stored privately: vault/media/horse-game-16/003.png]"
  }
]

I'm checking the frame timing and position calculations for a stop sign that should appear at the bottom of the image. At frame 186, the sign was planted at column 1, which should place it around x=165, y≈251, but I'm not seeing it in the image at that location.

Let me work through the possible causes: the draw function might not be calling the stop sign rendering, or there could be an issue with layer ordering, color handling, or the spring animation. I'm also considering whether the scale calculation is correct — with a scale of about 0.039, the sign dimensions work out to roughly 3px × 31px on screen, which should be visible. The pawn must be on the bottom row since the scan planted a sign there, so that's not the issue.…

3784:function draw_wall()
3914:function draw_stop_signs()
10349:  draw_wall()                                                               -- the blocker, under the board
10350:  draw_stop_signs()                                                         -- 🛑 the one-beat blockers, same strip

The hook is definitely there, so either the table's empty when it tries to draw or the drawing itself isn't producing anything visible. I'm realizing the timing here: `stop_sign_sweep()` runs at the end of `march_pawns`, and right after that in the same function, `stop_sign_scan()` plants the sign. So the sign exists for exactly one full beat—from the end of beat N through the end of beat N+1, which gives it about 0.85 seconds or roughly 51 frames of screen time. Frame 186 is where things start to get interesting.

The print statement confirms `stop_sign_plant` was called and the table was set with `stop_signs[gx] = s`. Items are granted in render mode, so that's not the issue. I'm checking whether `draw()` at line 10349 is the only rendering path or if render mode uses something different—but it's the same draw function either way. The `layer_push` call matches the pattern used elsewhere like in `draw_wall`, and `stop_sign_img.width` wouldn't be valid if the image were nil, so that's not crashing. 

Wait, I just realized something—`stop_signs` is a global, and I'm iterating through it in the draw loop. But in `reset()` I'm setting `stop_signs`...

Actually, let me add some targeted diagnostics. I'll print the count of signs at draw time, rate-limited to fire only a few times, and also check inside `draw_stop_signs` with a frame counter to see if entries are actually visible there. The geometry calculation for `stop_sign_pos` gives me BOARD_Y = 7, which means the y-coordinate is 7 + 240...

wait, let me recalculate: 7 + 240 + 8 + 2 - 6 = 251. For gx=1, x is 120 + 30 + 15 = 165. So the stop sign head (20 pixels tall, centered at 165, 251) spans y 241–261 and x 155–175. That's right at the board's bottom edge, and I'm wondering if the sign might be getting drawn behind the slab instead of in front of it.…

12.2.0

size (480, 270)

236 [(231, 232, 233), (231, 232, 233), (231, 232, 233)]

238 [(231, 232, 233), (231, 232, 233), (231, 232, 233)]

240 [(231, 232, 233), (231, 232, 233), (231, 232, 233)]

242 [(231, 232, 233), (231, 232, 233), (231, 232, 233)]

244 [(231, 232, 233), (231, 232, 233), (231, 232, 233)]

246 [(231, 232, 233), (231, 232, 233), (231, 232, 233)]

248 [(0, 0, 0), (0, 0, 0), (0, 0, 0)]

250 [(150, 152, 158), (150, 152, 158), (150, 152, 158)]

252 [(150, 152, 158), (150, 152, 158), (150, 152, 158)]

254 [(150, 152, 158), (150, 152, 158), (150, 152, 158)]

256 [(150, 152, 158), (150, 152, 158), (150, 152, 158)]

258 [(150, 152, 158), (150, 152, 158), (150, 152, 158)]

260 [(150, 152, 158), (150, 152, 158), (150, 152, 158)]

262 [(150, 152, 158), (150, 152, 158), (150, 152, 158)]

264 [(0, 0, 0), (0, 0, 0), (0, 0, 0)]

266 [(28, 32, 44), (28, 32, 44), (28, 32, 44)]

268 [(28, 32, 44), (28, 32, 44), (28, 32, 44)]
Shell cwd was reset to E:\a327ex

Looking at the pixel values and visual elements on screen, it seems the stop signs table might be empty when `draw_stop_signs` is called, or the drawing function is silently failing. I'm trying to trace back whether `stop_sign_sweep()` runs at the right time in the execution flow.…

(Bash completed with no output)

exit=127
1

/usr/bin/bash: line 1: ./anchor.exe: No such file or directory

render: C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/vfy/run_9100.txt -> C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/shot2/frame_%06d.png (1162 events, from 86.2s, 4s long)
render: armed at 86.20s
render: done — 89.7s of sim captured

The STOPSIGN prints aren't appearing during the render run because `stop_sign_scan` depends on both items being enabled and the goal_net item being in the owned set, but the render only progressed to t=89.7s—likely before the goal_net item was actually picked up in the replay timeline.

The check run had plants at several timestamps (42.61, 83.31, 86.71, 89.26, 98.71), but the render shows none within its 89.7s window, suggesting the two runs are diverging—probably because `--render` uses a different timestep than the check run. The render mode is producing a different event count and final score than the check mode, which suggests the simulation itself is running differently between the two. I'm realizing the check mode might be using a budget truncation or bot that affects how the replay progresses, which could explain why plants at those timestamps never triggered in render mode even though the sim ran through to 89.7 seconds.

Actually, I think I've found it — the verify file stores the pre-granted items like `goal_net` and `glove` in the expectation line (line 2), but the render harness only reads the first line of the replay file, which is just the KVP3 string. So the render replay never gets those pre-granted items, meaning the run never owned Stop Sign in the first place, which is why there are no plants and the final score is so much lower.

To actually render a stop sign, I need either a replay where goal_net is acquired through normal gameplay, or I need to find another approach. The pragmatic solution is to check whether the render harness supports item pre-granting via a command-line flag, or whether the KVP3 string itself can encode item acquisitions — since normal runs record item pickups through events in the log, those should already be encoded in the replay data. I'm realizing the cleanest approach is to temporarily inject a sign at boot unconditionally, just like the depth probe instrumentation I used before — a quick throwaway hack to verify the draw logic in isolation from the game mechanics. I'll force a plant call and disable the sweep, then render a single frame to see if the sign renders correctly with proper positioning and color.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The user's render runs are opening visible windows when they need headless mode. I'm checking whether the `--render` flag supports `--headless` — the documentation mentions dropping `--headless` for the verify command to watch the bot play, but doesn't show `--headless` being used with render. I should test adding `--headless` to the render command to see if frame capture still works, though if headless mode disables the GL context, that could be a problem.

Before testing, I need to finish setting up the probe by planting the stop signs. I'm thinking about the simplest way to inject them — either at the end of `reset()` or by modifying `stop_sign_scan()` to plant them unconditionally when a `DRAWPROBE` flag is set, which would happen after the first beat since scan runs at the end of each beat. I'll set the `DRAWPROBE` flag from engine arguments in the same place.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

render: C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/vfy/run_9100.txt -> C:/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/probe/frame_%06d.png (1162 events, from 3s, 0.5s long)
STOPSIGN t=1.01 gx=1
STOPSIGN t=1.01 gx=3
STOPSIGN t=1.01 gx=6
0

Running headless with rendering produces no frames because there's no GL context available for the capture pass. So the engine constraint is clear: I can't rasterize frames without a window. Since the user explicitly asked me not to open one, I need to either find another way to verify the draw or ask them. I could check the draw math numerically without actually rendering it to see if the calculations are correct.

The layer commands are queued in C and not easily introspectable from Lua, so that's not an option. The honest approach is to verify the logic, determinism, and geometry arithmetic headlessly, then hand it over to the user to check visually in the F7 lab—that's their job anyway. I'll add a temporary print statement in the draw function to output the computed screen-space values like `sc`, `pw`, and `ph` when running headless, which will catch any units bugs without needing a window.

The question is whether draw() even runs in headless mode—the fxsmoke test ran headless and created layers, so it might skip or…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

(Bash completed with no output)

Since `draw()` doesn't execute in headless mode, I can't verify the computation there. Instead, I'll move the calculation into the probe branch of `stop_sign_plant` where…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

DRAWPROBE gx=1 spring=0.75 head y=243.5..258.5 x=157.5..172.5 | post w=3.00px x=163.5..166.5 y=251.0..282.0 | screen h=270
DRAWPROBE gx=1 spring=1.00 head y=241.0..261.0 x=155.0..175.0 | post w=3.00px x=163.5..166.5 y=251.0..282.0 | screen h=270
DRAWPROBE gx=1 spring=1.35 head y=237.5..264.5 x=151.5..178.5 | post w=3.00px x=163.5..166.5 y=251.0..282.0 | screen h=270

I'm verifying the geometry of the spring animation—the head's an octagon centered at (165, 251) that oscillates vertically between 237.5 and 264.5, while the post stays exactly 3 pixels wide and rigid throughout the spring motion, extending from y 251 down to 282, which pushes it slightly past the 270-pixel screen edge.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

-- clean if empty --

fxsmoke: ======== REPORT ========
fxsmoke: no errors
fxsmoke: 16 scored nothing (check these by eye): heart, clover, chick, snow, cloud, guardian_angel, wall, growing_heart, hourglass, shield, web, helmet, turtle, golden_heart, old_clock, conductor
fxsmoke: ========================
Shutting down...

replays: 2/6 passed
replays: 0/16 passed
verify: FAILURES (16 failures)

The test run with `wall` instead of `locomotive` failed completely—0/16 replays passed. I'm confused about the numbers since 8 seeds should give 8 jobs, but the report shows 16, which suggests both generation and checking phases. The `--dir` flag might not have existed, causing the generation to fail. Let me check the actual output to understand what went wrong.…

replays: 8/8 passed

warning: in the working copy of 'fx_lab.lua', LF will be replaced by CRLF the next time Git touches it
warning: in the working copy of 'main.lua', LF will be replaced by CRLF the next time Git touches it
 fx_lab.lua |  55 +++++++++++++++++---
 main.lua   | 171 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 217 insertions(+), 9 deletions(-)
=== main.lua ===
warning: in the working copy of 'main.lua', LF will be replaced by CRLF the next time Git touches it
+sign_post   = color(108, 112, 122)
+stop_signs        = {}

+  stop_signs       = {}     -- 🛑 scenery, and one beat old at most
+  stop_signs = {}                -- 🛑 scenery, and one beat old at most
+STOP_PX        = 20     -- the octagon (vs the Barricade's 26 — a sign, not a slab)
+STOP_HEAD_DY   = 6      -- head center above the gutter line, to make room for the post
+STOP_POST_W    = 3
+STOP_POST_TAIL = 12     -- how far past the bottom of the screen the post runs
+
+function stop_sign_pos(gx)
+  return BOARD_X + gx*SQUARE + SQUARE/2,
+         BOARD_Y + BOARD_SIZE*SQUARE + SLAB/2 + 2 - STOP_HEAD_DY
+end
+
+stop_sign_place_done = false
+stop_sign_block_done = false
+
+function stop_sign_plant(gx)
+  if stop_signs[gx] then return stop_signs[gx] end
+  local x, y = stop_sign_pos(gx)
+  local s = { gx = gx, x = x, y = y, spring = spring_new(), timer = timer_new(),
+              flashing = false, z = 0, bump_x = 0, bump_y = 0, hopping = false }
+  spring_pull(s.spring, 'main', 0.6)                  -- the Barricade's arrival pop
... [37 more lines]

The diff checks out. I'm verifying a couple of implementation details: the `_gone` pawn check in scan is redundant since those pawns are already removed, and pawns that get pushed back during save are marked as netted so they won't be replanted. I should note in the handover that I couldn't visually confirm the pixel rendering due to PNG capture limitations.…

I need to adjust the stop sign's vertical position by increasing the offset so it sits higher and more visible, and then tweak the timing so it disappears a beat later rather than immediately after the block effect plays.

The issue is that the sign gets removed in the same frame as the block VFX, so the visual feedback on the sign itself never shows. I should mark hit signs and schedule their removal on a timer instead, letting the sweep skip any signs that were just hit or are pending their delayed exit. This way the block effect fully plays out before the sign vanishes, and I need to make sure the sign slot clears before a new one could plant there.

The tricky part is choosing the right timer — `game_timer` works since it persists even after the sign is removed from the array, but I need to guard against the delayed exit overlapping with the next beat's scan by checking if the sign object is still the same one before removing it. Using `game_timer` also keeps things deterministic since the VFX removal is pure and doesn't affect game state.

For the duration, I'm thinking around 0.3 seconds — that's long enough to see the block flash and the spring's initial oscillation, but short enough that it clears well before the next beat arrives.

Now I'm realizing there's a timing interaction to consider: if a sign gets hit and then the next beat's sweep runs before the 0.3-second removal timer fires, the sweep would catch it first. Since the beat interval can shrink below 0.3 seconds as the score climbs, I need to make sure the sweep skips already-hit signs to avoid that collision.

The safest approach is to mark hit signs with an `exiting` flag so the sweep knows to skip them, and let the timer handle the actual removal with an identity check as a guard. If a beat somehow runs faster than the delay, the sign lingers slightly into the next beat, which is fine visually — it just blocks a new plant in that column, but the plant would return the existing sign anyway, so there's no real issue.

I'm setting up a constant for the exit delay and writing a function that marks a sign as exiting, schedules its removal after a delay (or immediately if delay is zero), and triggers a puff effect when it finally leaves the screen.

Now I'm thinking through the sweep logic — it iterates through all active signs each frame and triggers their exit with the appropriate delay based on whether they were hit. The timing works out because the sweep runs right after the main update loop, so a freshly hit sign gets the full delay before disappearing. I'm being careful about modifying the table during iteration, since removing entries while iterating with pairs is safe in Lua as long as I'm not adding new keys. Adding a safety check...

I'll keep the plant logic simple and just reuse whatever sign is already there. The timing windows are tight enough that a collision between an exiting sign and a new plant can't happen in practice — the exit happens 0.3s into a beat while plants only trigger at beat end, which is at least 0.85s away. I'll document this assumption.

Now I need to adjust the stop sign's vertical position.  Raising it from STOP_HEAD_DY = 6 to 14 would move the head center up to y=243, putting most of it directly on the board area rather than below it. That's probably too high and would cover the bottom row of squares. The goal is to show more of the post and position the sign so it reads as standing in front of the board's bottom edge — so I should aim for the head center around y=245 instead.

With STOP_HEAD_DY = 12, the head spans 235..255 and the post shows 37px with 12px offscreen. The head would overlap the bottom row by about 12px, which is problematic since the sign draws over the pawns and would occlude them. A more conservative approach — raising by just 6px — would position the head center at y=245 with the top edge right at the board's boundary.

Actually, let me recalculate: if I use STOP_HEAD_DY = 10, the head centers at 247 and spans 237..257, overlapping a bottom-row pawn by only about 6px. That's more reasonable. Since he asked to move it up without specifying an exact amount and this is just a single-line value change, I'll pick STOP_HEAD_DY = 10 as a sensible middle ground and let him adjust from there if needed. wants it to overlap the board's bottom edge so the stop sign appears to be blocking the pawn rather than hidden beneath it. That's the real intent behind raising it. I'll set STOP_HEAD_DY to 12 and document both the value and the occlusion tradeoff for him to adjust if needed.

Now I'm weighing whether these changes are trivial enough to skip a brief. The head position is just a single-line constant change, so that's clearly trivial. The delayed disappear is trickier — it involves a new lifecycle function and constant, which normally wouldn't be trivial, but the user explicitly specified the behavior in prose, so it reads more like a direct imperative than a design decision I'm making.

Since this is a small delta within the system we just built together with an agreed scope, I'll implement it without ceremony and just describe what changed. Let me start writing the code.

Writing the exit handler... The timing works out perfectly — when a sign gets hit during a beat's leak processing, the sweep happens in the same call, so the hold duration is measured from the block moment. Signs that are exiting still update their spring and timer animations since they remain in the table until the timer completes. I need to verify the draw step handles exiting signs correctly too.

One edge case to consider: if the game resets while there are pending timer callbacks for stop signs, those callbacks would fire later and check if…

1009:game_timer = timer_new()

The issue is that `game_timer` persists across resets, so pending callbacks survive restarts. The existing code already handles this pattern with guards like `if not p._gone`. My `go()` function checks `stop_signs[s.gx] == s` to verify the sign is still active, but after a reset this becomes false — so it skips the removal logic but still triggers the puff effect, creating a stray visual at the board edge. I need to guard the puff the same way, only showing it if the sign was actually removed or is still live.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: ======== REPORT ========
fxsmoke: no errors
fxsmoke: 2 scored nothing (check these by eye): wall, shield
fxsmoke: ========================
Shutting down...

replays: 8/8 passed
fxsmoke: no errors

I'm rethinking the exit animation for the signs — instead of a puff effect, they'll tilt slightly to one side and then sink downward off-screen like a puppet being pulled down by its stick. I'll add rotation and vertical offset fields to each sign, then update the drawing logic to animate the tilt and descent before removing the element.

For timing, the tilt happens quickly over about 0.12 seconds to around 7 degrees, followed by a 0.25-second drop that accelerates downward. To avoid randomness and keep the animation deterministic, I'll use column parity to alternate which direction each sign tilts — signs in even columns tilt one way, odd columns the other — so multiple signs exiting simultaneously don't all move identically. The tilt-then-drop sequence reads as the stick being yanked and tipped as it's pulled down.

For the drop distance, the sign needs to move about 45 pixels below the screen edge to fully clear. The tricky part is that the post length is currently computed from the animated y position, which means as the head descends the post shrinks but still reaches the bottom — that's actually correct for the puppet-show effect, but I need to guard against the post going negative. Better approach: compute the post length from the sign's resting y position instead of the animated position, so the whole assembly moves down as one unit without the post recalculating.

Now I'm thinking about the rotation mechanics — currently the sign rotates about its head center, which makes the post swing sideways at the bottom. But a real sign on a stick would pivot lower, maybe at the hand or somewhere below, which would swing the head instead.

For a subtle tilt though, rotating about the head center works fine and keeps things simple — the head tips slightly in place while the post shifts just a few pixels, which reads as the sign being removed like a puppet flat. I'll stick with that approach.

I'm setting up the animation sequence using a tweening system: first the sign tips at a small angle over a short duration, then once that completes, it falls downward. The timer keeps running as long as the sign exists in the active collection, and the final callback cleans it up. But I need to reconsider how the hold delay works — currently it's using a separate game timer callback, which might not sync properly with the new animation flow.

There's also a reset edge case to handle: if the game resets while a sign is mid-animation, the collection gets cleared and the sign's timer stops updating, so it just vanishes. That's acceptable behavior. Let me verify the timer_tween function signature to make sure I'm calling it correctly with the right parameters.

I need to check which easing functions are available in this codebase — I see quad_out and cubic_out used, and there's a comment mentioning cubic_in, so those should exist. I should also initialize `s.rot` and `s.drop` to 0 when planting the sign so timer_tween has numeric starting values to work with. And I need to remove the emoji_puff effect from the exit animation.

Now I'm working through the constants for the stop animation: the angle is about 0.14 radians (roughly 8 degrees), the tip stops after 0.10 seconds, and the fall takes 0.26 seconds covering 52 pixels of distance. That distance clears the head (which sits at 245 plus the drop reaches 297) and the post below it,…

23:    linear, sine_*, quad_*, cubic_*, quart_*, quint_*,
60:  Framerate-independent linear interpolation.
448:function math.linear(t) return t end
477:function math.quad_in(t) return t*t end
481:function math.quad_in_out(t)
501:function math.cubic_in(t) return t*t*t end
508:function math.cubic_in_out(t)
--- in use ---
math.cubic_in
math.cubic_in_out

3861 -- the next one: by then stun/lock are decremented and slow_ready is re-armed, so
3862    -- every flag is already in its next-beat state.
3863    function stop_sign_scan()
3864      if not items_enabled or not owned_set['goal_net'] then return end
3865      for _, p in ipairs(pawns) do
3866        if not p.friendly and not p.item and not p.netted and not p._gone
3867           and p.gy == BOARD_SIZE - 1 then
3868          local _, dy = piece_advance_dir(p)
3869          if dy == 1 then stop_sign_plant(p.gx) end
3870        end
3871      end
3872    end
3873    
3874    -- The hit, and the Barricade's own body: flash, spring, chips, shake, clip.
3875    -- No per-pawn `first` gate here — wall_block needs one because a pinned pawn
3876    -- leans on it every beat forever, while a sign is hit once and swept.
3877    function stop_sign_block(s)
3878      if not s then return end
3879      s.flashing = true
3880      timer_after(s.timer, 0.1, 'flash', function() s.flashing = false end)
3881      spring_pull(s.spring, 'main', 0.4)
3882      s.hit = true
3883      for k = 1, 5 do
3884        spawn_emoji_particle(s.x, s.y - 4, stop_sign_img, {
3885          velocity = random_float(110, 230), direction = random_float(-math.pi, 0),
3886          duration = random_float(0.35, 0.6), scale = random_float(0.6, 1.0),
3887          gravity = 560, flash_on_spawn = 0.3,
3888        })
3889      end
3890      shake_trauma(main_camera.shake, 0.3, 0.15)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

125:function timer_tween(t, duration, name_or_target, target_or_values, values_or_easing, easing_or_after, after_function)
function timer_tween(t, duration, name_or_target, target_or_values, values_or_easing, easing_or_after, after_function)
  local name, target, values, easing, after
  if type(name_or_target) == 'string' then
    name, target, values, easing, after = name_or_target, target_or_values, values_or_easing, easing_or_after, after_function
  else
    name, target, values, easing, after = uid(t), name_or_target, target_or_values, values_or_easing, easing_or_after
  end
  easing = easing or math.linear
  local initial_values = {}
  for key, _ in pairs(values) do
    initial_values[key] = target[key]
  end
  insert_entry(t, {name = name, mode = 'tween', time = 0, duration = duration, target = target, values = values, initial_values = initial_values, easing = easing, after = after})

I'm noticing a potential bug where I'm reusing the same tag `'exit'` for both the tip tween and the fall tween. Since `insert_entry` replaces entries with the same name, when the tip's `after` callback starts the fall tween with that same tag, the new tween might get immediately cleaned up by the completing entry's removal logic.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: ======== REPORT ========
fxsmoke: no errors
fxsmoke: 2 scored nothing (check these by eye): wall, shield
fxsmoke: ========================
Shutting down...

I need to verify that the exit animation completes properly and the sign gets cleaned up from `stop_signs`. The issue is that the fxsmoke test harness manually ticks timers for pawns and knights but doesn't do the same for stop signs, so the exit tween never progresses and the sign never gets removed — that's a limitation of the test setup rather than a bug in my code.

In the actual game, the real `update()` loop ticks the stop_signs timers, so I should verify the removal works by running a headless check that exercises the real update loop and probing the table size. I'll add a temporary print statement to track the count of stop_signs at each sweep — if the exit animation works correctly, the count should stay small rather than accumulating.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

(Bash completed with no output)

The SIGNPROBE output is empty across those runs, which means the stop sign sweep never encountered any planted signs—suggesting no signs were actually created during those test executions. But run_9300 and 9301 were set up with pre-granted items, and the check phase should be applying those pre-conditions from the config. Yet when I look back at run_9100 with a different pre-grant set, the check phase did successfully plant signs and logged STOPSIGN output at t=42, so something's…

      5 SIGNPROBE live=1 exiting=0

The data confirms that signs are being properly removed—they never accumulate beyond one at a time, and the `exiting=0` count on every sweep shows the exit animation completes and clears the sign within each beat. Now I'm integrating stop_signs ticking into the state machine.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fxsmoke.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: ======== REPORT ========
fxsmoke: no errors
fxsmoke: 16 scored nothing (check these by eye): heart, clover, chick, snow, cloud, guardian_angel, wall, growing_heart, hourglass, shield, web, helmet, turtle, golden_heart, old_clock, conductor
fxsmoke: ========================
Shutting down...

replays: 8/8 passed
-- probes clean if nothing above --

The exit needs to arc away on block impact—it should tip and move upward at the same time, then follow a parabolic path downward while also drifting sideways in the direction of the tip. The rotation starts fast during the upward phase but naturally decelerates as gravity takes over and the exit falls faster.

For the randomness, I need to use the engine's non-recorded RNG (bare `random_float` without passing `grng`) since this is purely visual and can't affect replay stability. I've already got precedent for this in the particle effects, so I'll use that same approach here.

Now for the motion: I'm splitting this into two phases — a quick pop upward with rotation ramping fast, then a fall where rotation continues decelerating naturally. The sideways drift stays linear throughout both phases, creating a projectile-like arc. gives most rotation up front, then a slower continuation as it falls. Now I'm setting the numeric parameters: the angle range from about 7° to 31° (or maybe up to 0.6 radians), the pop height at 9 pixels, pop duration at 0.12 seconds, horizontal drift between 4 and 12 pixels depending on direction, and the fall distance needs to account for the apex being 9 pixels up.

For the fall distance, I'm calculating that from the resting position it should drop 60 pixels, which means from the apex it travels 69 pixels down — that puts the head at 305 pixels, safely off-screen. The fall duration is 0.30 seconds.

For the drift implementation, I'm deciding whether to reuse the existing `bump_x` field that's already wired into the draw logic or add a dedicated field for clarity. I'm leaning toward reusing `bump_x` since it's already there and serves as a positional offset. -documenting. I'm updating the draw call to include the new `dx` offset alongside the existing `bump_x`, so the sign moves both horizontally and vertically during the arc. The post stays rigid and moves with the whole assembly, so its bottom shifts up by 9 pixels during the pop-up animation. I'm also considering whether unhit signs that exit with no delay should follow the same arc behavior.

The core question is whether an unhit sign should get the full pop-up and tip animation or just a simple downward pull like the original puppet removal. The pop-up strongly reads as being struck, so it'd feel odd on an unhit sign. I could parameterize the exit to give hit signs the full arc and unhit signs just the tip and fall, but that adds complexity the user didn't ask for. I'm leaning toward keeping it simple and consistent with the same exit for both.

Actually, the cleanest approach is to scale the pop height and drift based on whether it was hit — zero pop if unhit, smaller angle range too. One code path with a single conditional branch. Now I'm also reconsidering the hold duration, which is currently set to 0.3 seconds.

The hold was meant to delay the exit so the block's visual feedback could be seen, but the user wants the tip and pop to start the moment the block happens. That means removing the hold for hit signs entirely — the arc should begin immediately on block. The flash and spring effects still fire at the same instant and now play during the arc itself, which becomes the main visual juice.

I need to restructure the logic: when a sign gets hit, trigger the flash, spring, chips, and shake, then immediately start the exit arc. The sweep function only handles unhit signs that need to exit without the pop. This means I can delete the hold constant since it's no longer needed.

The timing works out because `stop_sign_block` is called before `stop_sign_sweep` in the march loop, so by the time sweep runs, the hit sign is already marked as exiting and gets skipped. The exit tweens run on the sign's timer while it's still in the active signs list.

Writing the constants... Writing animation tweens... Finishing the animation setup...

For an unhit sign, the pop value is zero, so the drop tweens to zero over 0.12 seconds with no actual movement, then falls — that's a brief pause before the pull-down, which works fine. I should simplify the side randomization using a cleaner boolean check, and I need to initialize the `dx` field to zero in the plant setup. The draw function needs to add the `dx` offset, and I should remove the `STOP_EXIT_HOLD` constant and update the sweep signature to drop the delay parameter. Let me verify that `timer_tween` can handle multiple tweens on the same target object with different property names.…

3893     stop_sign_block_done = true
3894        sfx(sounds.wall_block, volumes.wall_block)
3895      end
3896    end
3897    
3898    -- ⛔ A STRUCK SIGN IS HELD BEFORE IT LEAVES. stop_sign_block gives it a white
3899    -- flash, a 0.4 spring and five chips, and the sweep runs in the same march_pawns
3900    -- call the block does — so removing it there threw every one of those away in the
3901    -- frame it was created and the puff was the only thing that ever reached the
3902    -- screen. The hold is what the block juice is FOR.
3903    -- ⚠ Measured against the flash (0.1s) and the spring's first swing, not the
3904    -- chips: the chips are their own particles and outlive the sign either way.
3905    STOP_EXIT_HOLD = 0.3
3906    
3907    -- ── THE EXIT: a puppet-show flat pulled down on its stick ────────────────────
3908    -- ⛔ NOT A PUFF, and the difference is what the object IS. A burst says the sign
3909    -- was destroyed; this one was never destroyed, it was TAKEN AWAY — it is a
3910    -- painted board on a pole that somebody below the stage is holding. So it tips
3911    -- as the pole is tilted, and then it is drawn straight down out of frame.
3912    -- The two beats are deliberately different eases: the tip decelerates (a hand
3913    -- turning it), the fall accelerates (a hand yanking it). Reversed, it reads as
3914    -- floating down rather than being pulled.
3915    -- ⚠ WHICH WAY IT TIPS IS THE COLUMN'S PARITY, not a roll. Several signs exit on
3916    -- the same frame and all leaning the same way looks like one mechanism moving;
3917    -- alternating makes them read as separate objects on separate sticks. Parity
3918    -- rather than grng because nothing here may touch the recorded stream.
3919    STOP_TIP_ANG  = 0.16    -- rad (~9°) — a lean, not a topple
3920    STOP_TIP_DUR  = 0.10
3921    STOP_FALL_DUR = 0.26
3922    STOP_FALL_DY  = 54      -- clears the head AND its tilted corners past gh
... [28 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

Exit code 2
grep: main.lua: No such file or directory
--- fx_lab refs ---
grep: fx_lab.lua: No such file or directory

3900:  stop_sign_exit(s)
3952:function stop_sign_exit(s)
3982:    if not s.exiting then stop_sign_exit(s) end
--- fx_lab refs ---
1476:  goal_net       = { 'fn:goal_net_save', 'fn:stop_sign_scan', 'fn:stop_sign_plant',
1477:                     'fn:stop_sign_block', 'fn:stop_sign_sweep', 'fn:draw_stop_signs',
1563:  stop_sign_scan  = 'The telegraph: at the END of each beat, every unsaved enemy on the bottom row that piece_advance_dir says will step OFF next beat gets a sign planted under its column. A prediction, and cosmetic - a wrong guess is a sign nothing arrives at.',
1564:  stop_sign_plant = 'One sign appearing: 6-sign puff, 0.6 spring, wall_place clip (slot still empty - drop a file). Keyed by COLUMN, so a second plant in the same column is a no-op.',
1565:  stop_sign_block = 'The stop, the Barricade\'s body exactly: wall_block clip + 5 chips flung up + 0.3/0.15 shake + 0.4 spring + white flash. No per-pawn gate - a sign is hit once and swept.',
1566:  stop_sign_sweep = 'The beat boundary: every sign standing goes, hit or not, with a small puff. Runs AFTER the leak loop and BEFORE the scan - the order is what gives a sign exactly one beat of life.',
1567:  draw_stop_signs = 'The octagon on its post, STOP_PX with the post STOP_POST_W wide running STOP_POST_TAIL past the bottom of the screen. Post dimensions are divided back out by the scale, so it is rigid in screen px while the head springs.',

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (note: the file had been modified on disk since you last read it — the edit applied cleanly, but the file contains other changes not in your context. Read it before edits that depend on surrounding content.)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: ======== REPORT ========
fxsmoke: no errors
fxsmoke: 16 scored nothing (check these by eye): heart, clover, chick, snow, cloud, guardian_angel, wall, growing_heart, hourglass, shield, web, helmet, turtle, golden_heart, old_clock, conductor
fxsmoke: ========================
Shutting down...

I need to verify that the `random_float` calls I added in `stop_sign_exit` won't interfere with the recorded simulation stream. Since `random_float` uses the engine's global RNG rather than the `grng` stream, it should be isolated, but I need to confirm this doesn't cause any determinism issues.…

replays: 10/10 passed

replays: 1/3 passed
replays: 1/3 passed

I'm noticing something concerning — when I recheck the same files in isolation, I only get 1 out of 3 passing, but running generation and checking in the same process gives 10 out of 10. This could be a red flag, though it might be a pre-existing issue rather than something my change introduced. The `--verify=both` flag runs both operations in one process so state carries over, whereas a fresh process might behave differently due to things like entropy-seeded randomness varying between runs. What's interesting is that both standalone rechecks produced the same 1/3 result, suggesting this isn't random variation.…

 M fx_done.lua
replays: 10/10 passed

replays: 1/3 passed
  FAIL /c/Users/adn/AppData/Local/Temp/claude/E--a327ex/001401a9-94a8-4f9e-b94e-e9334af59fca/scratchpad/base/run_9501.txt — missing file (run --verify=gen first)
  FAIL /c/Users/adn/AppData/Loca — missing file (run --verify=gen first)

Ah, so the 1/3 failure rate isn't a desync issue at all—it's the argument parser truncating the file list when passing long absolute paths through the comma-separated `--files=` parameter. The baseline exhibits the exact same truncation pattern with missing files and a cut-off path, which means my earlier result wasn't a regression, just the same artifact showing up consistently.…

replays: 10/10 passed

 M fx_done.lua
 M fx_lab.lua
 M fxsmoke.lua
 M main.lua
replays: 10/10 passed

fxsmoke: no errors
 fx_lab.lua  |  63 +++++++++++++--
 fxsmoke.lua |   5 ++
 main.lua    | 262 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 321 insertions(+), 9 deletions(-)

Actually, the barricade does spawn particles when hit—I'm looking at the wall block code that plays a sound effect and then spawns emoji particles with specific physics properties like velocity, direction, and duration to create an arc effect rather than a spray pattern.

So the user's premise is incorrect, but their instruction to remove particles from the stop sign is clear. The real question is whether they still want that change if the barricade actually does spawn particles, since their request was framed as matching the barricade's behavior. The barricade actually does spawn particles on its first impact per pawn, then stops on repeat hits — so the premise isn't quite right. But the user's request still makes sense on its own terms: since the sign now flies away as a whole object rather than shattering, having chips spawn contradicts that visual language. I'll make the change and note the distinction, since the imperative is clear and easily reversible if needed.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (note: the file had been modified on disk since you last read it — the edit applied cleanly, but the file contains other changes not in your context. Read it before edits that depend on surrounding content.)

3848:  emoji_puff(x, y, stop_sign_img, 6, 45, 120, 0.3, 0.55)
--- no stop_sign particle calls above = clean ---
fxsmoke: no errors

There's still that appearance puff effect on the stop sign plant, and I'm wondering if it should stay or go. The user's instruction about not spawning particles was specifically about the hit reaction, but this puff mirrors how the barricade behaves when it first appears — so maybe it should remain.…

replays: 8/8 passed
replays: 8/8 passed

main.lua:4550:-- A sideways "nope" jolt: kick to one side and wobble back on an elastic ease, so it
main.lua:5052:-- arrives dead, a spring overshoots once and wobbles out.
main.lua:5079:-- wobble after it, which is what sells weight settling rather than a flick.
main.lua:6616:  -- compound, and a pawn that SURVIVED shouldn't out-wobble its own spawn pop
main.lua:8428:  -- `jitter` widens the angular wobble and `rad_min` deepens the radius
main.lua:8431:  -- values: mild wobble, no stretch.

I'm searching through the KVP directory and recent logs to find where "jelly" came from — it doesn't appear in the main project, so it might be from another template or session. Looking back at the recent conversation about Stop Sign's visuals, the mention of "wobbling jelly" in relation to Curling Stone is starting to make more sense in context.…

./emoji/sound_tuning.lua:55:  ['assets/sounds/fx_wobbling_jelly.ogg'] = { bits = 8, sr_div = 3 },
./emoji/volume_tuning.lua:50:  wobbling_jelly = 0.55,
./sound_moments.lua:22:    'wobbling_jelly',
./sound_moments.lua:34:    banana_push = { 'wobbling_jelly' },
./sound_moments.lua:38:    subwoofer_pulse = { 'subwoofer_pulse', 'wobbling_jelly' },
./sound_overrides.lua:17:  wobbling_jelly = { file = "assets/sounds/fx_wobbling_jelly.ogg", src = "E:\\sound packs\\sounddictionary\\anime\\wobbling-jelly-1__wobbling-jelly.ogg", at = "2026-08-11" },
=== logs ===
/e/a327ex/a327ex-site/logs/3d-exploration-robots.md
/e/a327ex/a327ex-site/logs/emoji-aimer-6.md
/e/a327ex/a327ex-site/logs/horse-game-15.md
/e/a327ex/a327ex-site/logs/sound-effect-lab-bulk-download.md
/e/a327ex/a327ex-site/logs/visual-experiments-5.md

I see that `wobbling_jelly` is actually a sound effect defined in the sound_moments file, appearing in a couple of different…

1    -- sound MOMENTS, authored in the F7 lab (see emoji/sounds.lua). An edited
2   -- moment's list REPLACES what its call site wired; entry == moment name
3   -- means "the wired sound". SHIPS with the game; safe to edit by hand.
4   return {
5     moments = {
6       capture_switch = { 'capture_switch' },
7       comet_impact = { 'comet_impact' },
8       helmet_block = { 'shield_block1', 'shield_block2' },
9       ice_break = { 'ice_break', 'ice_impact_break' },
10      push = { 'push', 'push_wind' },
11    },
12    names = {
13      'banana_fall',
14      'broom_sweep',
15      'chain',
16      'helmet_block',
17      'ice_impact_break',
18      'push',
19      'push_wind',
20      'rocket_blast',
21      'subwoofer_pulse',
22      'wobbling_jelly',
23    },
24    disabled = {
25    },
26    item_fx = {
27      broom = { 'broom_sweep' },
28      coffee = { { 'coin_collect', 0.75 } },
29      glove = { 'push' },
30      seedling = { 'coin_collect' },
... [11 more lines]

I'm looking at how the sound effects system is structured—items have associated sounds keyed by their ID, and trigger moments have their own sound mappings. The curling stone would need an entry in the item effects dictionary to play its wobbling sound, but I need to verify there's actually a call site that triggers it, since I only see the push funnel playing the glove sound so far.…

882:    if type(t.item_fx) == 'table' then SOUND_ITEM_FX = t.item_fx end
883:    if type(t.trigger_fx) == 'table' then SOUND_TRIGGER_FX = t.trigger_fx end
4273:        -- also what plays the item's wired sounds (sound_item_fx_play rides the
5372:-- It is authored as GLOVE's item_fx moment in the F7 lab (`glove = { 'push' }`),
5386:  sound_item_fx_play('glove')
5443:    -- design (the shove owns its audio, once per event), so an item_fx binding
7830:                    -- takes it. The item's own moment could not do this: item_fx
=== fx_lab slots ===
744:  curling_stone  = { t = 'push', mode = 'open', note = 'slides until something stops it' },

5432   -- playing early. Boom carries the identical split (boom_splash).
5433      for _, e in ipairs(ring) do
5434        push_and_resolve(e.p, e.dx, e.dy, 'subwoofer', KNIGHT_HOP_DUR)
5435      end
5436      local cx, cy = cell_center(gx, gy)
5437      on_hop_land(function()
5438        emoji_puff(cx, cy, speaker_img, 8, 90, 190, 0.3, 0.5)
5439        shake_trauma(main_camera.shake, 0.35, 0.16)
5440        -- 🔊 subwoofer_pulse — ONCE PER BLAST, here rather than per ring pawn.
5441        -- ⚠ It needs a trigger of its own: the only place this item reaches a pulse
5442        -- is item_pulse_id_quiet inside push_and_resolve, and that is quiet by
5443        -- design (the shove owns its audio, once per event), so an item_fx binding
5444        -- on `subwoofer` would never make a sound. On the landing, so it stacks with
5445        -- the capture chord and the shove rather than arriving a hop before them.
5446        sound_play_trigger('subwoofer_pulse')
5447      end)
5448    end
5449    
5450    -- 🌊 WAVE: every 16 beats the board sweeps back. Pushes run TOP-DOWN (lowest
5451    -- gy first) because everything moves up — the pawn in front must vacate before
5452    -- the one behind it tries, or a packed column would stop itself.
5453    function wave_sweep()
5454      local order = {}
5455      for _, p in ipairs(pawns) do
5456        if not p.friendly and not p.item then order[#order + 1] = p end
5457      end
5458      table.sort(order, function(a, b) return a.gy < b.gy end)
5459      for _, p in ipairs(order) do push_and_resolve(p, 0, -1, 'wave') end
5460      for gx = 0, BOARD_SIZE - 1 do
5461        local cx, cy = cell_center(gx, BOARD_SIZE - 1)

I see that `sound_play_trigger()` handles trigger effects while `sound_item_fx_play()` handles item effects. Curling Stone has the same issue as Subwoofer—it's a passive modifier on `push_distance()` that never gets its own pulse since `push_and_resolve` only calls `item_pulse_id_quiet()` for the source item, not for Curling Stone itself. This means an `item_fx`

binding on Curling Stone would never fire.

The natural trigger moment for Curling Stone's sound would be when a push actually slides more than one square—when the ladder gets overridden and the pawn travels further. I'd need to check where `push_slide_vfx()` happens and use that as the cue, gating it once-per-event like Subwoofer does to avoid multiple copies firing. But this is really a design decision about *when* the sound plays, which means I should ask first rather than propose it myself.

That said, his message was terse and declarative—he's been giving short directives all session expecting them applied. Let me look at the actual code structure around `push_slide_vfx` and the sound table to see if there's already a natural chokepoint, then decide whether to just implement it with sensible defaults or ask for clarification.

The gating question is the real open choice here. But looking at the existing pattern in this file—`push_sound_once` already gates the shove sound to once per event with a comment explaining the reasoning—that precedent settles it: once per event makes sense. So I'll add a `curling_slide` trigger that fires when Curling Stone is owned and a push actually slides something, bound to the wobbling_jelly sound in sound_moments.lua.…

5355   -- flight it had not finished.
5356      -- ⚠ Only hide them if it was NOT ALREADY STUNNED. A Glove push rides a strike,
5357      -- and strike_impact stunned it a moment ago — hiding those would blink stars
5358      -- that are already on screen back off for the length of the slide.
5359      if not p._gone then
5360        local dizzy = owned_set['dizzy']
5361        local had   = (p.stun or 0) > 0
5362        p.stun = math.max(p.stun or 0, dizzy and DIZZY_STUN or STUN_BEATS)
5363        if dizzy then item_pulse_id('dizzy') end
5364        if not had and arrive and arrive > 0 then
5365          p.stun_hidden = true
5366          timer_after(game_timer, arrive, function() p.stun_hidden = nil end)
5367        end
5368      end
5369    end
5370    
5371    -- 🔊 THE SHOVE'S SOUND — ONE PER EVENT, however many pawns moved.
5372    -- It is authored as GLOVE's item_fx moment in the F7 lab (`glove = { 'push' }`),
5373    -- because that is where the owner dropped it, but it belongs to the SHOVE rather
5374    -- than to Glove: Subwoofer, Wave and the Chequered Flag all push, and a
5375    -- Locomotive chain pushes several times inside a single one. Eight pawns
5376    -- displaced by one blast is one event to the ear.
5377    --
5378    -- ⚠ The gate is a flag cleared at each EVENT boundary — a knight commit and a
5379    -- march beat — rather than a timer, so it can never drift against the sim or
5380    -- behave differently on a replay. Nothing here is sim state; it only gates audio.
5381    push_sfx_done   = false
5382    push_shake_done = false   -- ...and the camera, gated the same way (push_slide_vfx)
5383    function push_sound_once()
5384      if push_sfx_done then return end
... [10 more lines]

I'm adding a curling-stone slide sound that triggers once per event, similar to the push sound. It should fire in `push_and_resolve` after `push_pawn` returns `moved`, but only if the Curling Stone is owned and the movement exceeds what the base ladder would normally allow. I need to figure out the right threshold since `push_distance()` returns a large value when Curling Stone is active, making it hard to distinguish a meaningful slide from a standard push.

The key insight is that with Curling Stone, the ladder is completely disabled, so any movement of 2+ squares represents the item's effect in action. I'll gate the sound on `owned_set['curling_stone'] and moved >= 2`, which ensures the slide sound only plays when the stone is actually doing its job. Now I'm implementing the Lua code to handle this, with its own sound gate separate from the push sound since a long slide should trigger both effects.

Writing slide sound logic... Adding sound configuration...…

738:  banana_peel    = { t = 'push', mode = 'edge',
751:  rocket         = { t = 'push', mode = 'open', edge_alt = true, with = { 'iron_arm' },
762:  subwoofer      = { t = 'nth_capture', n = 6, ring = true },
905:    items = { banana_peel = true },
910:    items = { banana_peel = true },
915:    items = { subwoofer = true },
920:    items = { rocket = true },
=== trigger moment registry ===
main.lua:5000:  -- 🔊 rocket_hit (the trigger) -> `rocket_blast` (the moment), an EMPTY named
main.lua:5005:  sound_play_trigger('rocket_hit')
main.lua:7888:  -- 🔊 banana_push — the SHOVE off the edge, distinct from banana_drop, which is
main.lua:7892:  sound_play_trigger('banana_push')
fx_lab.lua:902:  banana_push = {
fx_lab.lua:912:  subwoofer_pulse = {
fx_lab.lua:917:  rocket_hit = {

890    collection     = CHORD,
891   package        = CHORD,
892   opal           = { { key = 'opal_light', label = 'light-square layer', pending = true },
893                      { key = 'capture_switch', label = 'chord: switch' } },
894 }
895 
896 -- ── WIRED TRIGGERS — the picker's vocabulary ─────────────────────────────────
897 -- Each entry is a named point in game code (one sound_play_trigger() call at
898 -- the semantic spot, added when the owner asks for a condition the existing
899 -- vocabulary can't express). `items` = which items surface it in the panel
900 -- and the + moment picker. Grows on request; never speculatively.
901 FX_TRIGGERS = {
902   banana_push = {
903     label = 'the shove off the edge',
904     desc  = 'the moment it is launched past the board — the fall is banana_drop, a beat later',
905     items = { banana_peel = true },
906   },
907   banana_drop = {
908     label = 'the drop',
909     desc  = 'the instant gravity takes it, after the flight and the hang — not the hit',
910     items = { banana_peel = true },
911   },
912   subwoofer_pulse = {
913     label = 'the pulse',
914     desc  = 'the blast itself, once per ring, on the landing — not once per pawn shoved',
915     items = { subwoofer = true },
916   },
917   rocket_hit = {
918     label = 'the detonation',
919     desc  = "the blast at the end of a Rocket shove — fires whether the pawn died or survived",
... [10 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

5824:  push_sfx_done, push_shake_done = false, false
6260:  push_sfx_done, push_shake_done = false, false       -- ...and this move's shove sound + camera are unspent

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\sound_moments.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: no errors

I need to verify that the trigger is actually firing by instrumenting the code to count `curling_slide` plays. The quickest approach is to add…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

CURLPROBE moved=5
CURLPROBE moved=3
CURLPROBE moved=2
CURLPROBE moved=2
CURLPROBE moved=3
CURLPROBE moved=2
CURLPROBE moved=2
CURLPROBE moved=3
CURLPROBE moved=4
CURLPROBE moved=3
CURLPROBE moved=3
CURLPROBE moved=6
=== total fires ===
33

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

-- probes clean --
fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed

I need to revert the curling stone sound changes I just made, then tackle the Wave bug where pawns get stunned but don't slide back. Let me start by removing the sound function and its related code from the main files, then dig into why the Wave effect isn't moving pawns properly.

Looking at the wave_sweep function, it's pushing all enemy pawns upward one row and sorting them by their y-position so the topmost ones move first. The issue is that when push_pawn checks if a cell is blocked, it's finding other pawns in the way—since Wave pushes all pawns simultaneously, earlier pawns in the sorted order might be blocking later ones from moving. push_pawn to return 'blocked' — a knight in the same cell, an ally or coin occupying the target, fire, skull, or another pawn. The sort order is ascending by gy, so the topmost pawn moves first, which should let lower pawns push upward in sequence. But if every pawn is hitting a block immediately, maybe the issue is that doomed pawns are being counted as occupying their cell even though they're marked for capture.

Let me actually trace through the code path — I should check if `wave_sweep` is even being called, since Wave is a beat-counted item with `beat_max = 16`. There might be a different execution path I'm missing. And I should verify `push_distance()` — if `stats.push` is 0 and the curling stone isn't owned, the distance should be 1, which seems fine. The real question is whether the wave is being emitted when `occ` or something else is in a state that prevents the sweep from running.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

removed bytes: 193

-- main clean --

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\sound_moments.lua has been updated successfully. (file state is current in your context — no need to Read it back)

main.lua:578:  'wave', 'chequered_flag', 'balloon', 'cat', 'tornado',
main.lua:5453:function wave_sweep()
main.lua:5459:  for _, p in ipairs(order) do push_and_resolve(p, 0, -1, 'wave') end
items.lua:1033:  item_def{ id = 'wave', name = 'Wave', weight = 2, img = wave_img, beat_max = 16,
items.lua:1037:            on_fire = function(it) wave_sweep() end }

5446     sound_play_trigger('subwoofer_pulse')
5447      end)
5448    end
5449    
5450    -- 🌊 WAVE: every 16 beats the board sweeps back. Pushes run TOP-DOWN (lowest
5451    -- gy first) because everything moves up — the pawn in front must vacate before
5452    -- the one behind it tries, or a packed column would stop itself.
5453    function wave_sweep()
5454      local order = {}
5455      for _, p in ipairs(pawns) do
5456        if not p.friendly and not p.item then order[#order + 1] = p end
5457      end
5458      table.sort(order, function(a, b) return a.gy < b.gy end)
5459      for _, p in ipairs(order) do push_and_resolve(p, 0, -1, 'wave') end
5460      for gx = 0, BOARD_SIZE - 1 do
5461        local cx, cy = cell_center(gx, BOARD_SIZE - 1)
5462        spawn_emoji_particle(cx, cy, wave_img, {
5463          velocity = random_float(90, 140), direction = -math.pi/2,
5464          duration = 0.5, scale = random_float(0.8, 1.1), flash_on_spawn = 0.2,
5465        })
5466      end
5467      sfx_any('capture_switch', 2)
5468      shake_trauma(main_camera.shake, 0.4, 0.2)
5469    end
5470    
5471    -- 🏁 CHEQUERED FLAG: the Parity/Force bridge. Light squares take a flat 1,
5472    -- dark squares are Pushed back — the design law (LIGHT = violence, DARK =
5473    -- greed) bent into a single beat effect. Both halves snapshot first.
5474    function flag_wave()
5475      local light, dark = {}, {}
... [2 more lines]

I need to debug what's actually happening with the pawns — specifically what stop type each one gets and how far they move. Let me add some instrumentation to wave_sweep to see the per-pawn results. But first, I should think through the timing more carefully: `on_fire` calls `wave_sweep()` after `march_beat` fires at the end of march_pawns, so positions should be settled by then. Though I'm realizing I need to trace where the beat counter comes from and how it relates to the march sequence.

Actually, I think I found the issue. The wave sorts pawns by ascending gy so they move upward correctly, but `push_pawn` has a blocking check that looks at `doomed_at` — which includes pawns marked for death whose visual effects haven't fired yet. If those captured pawns still occupy cells at the moment the wave runs, they'd block movement even though they're visually disappearing. Adding debug output...…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

WAVEPROBE gx=1 gy=1 -> gy=0 stop=nil
WAVEPROBE gx=3 gy=1 -> gy=0 stop=nil
WAVEPROBE gx=6 gy=2 -> gy=1 stop=nil
WAVEPROBE gx=1 gy=2 -> gy=1 stop=nil
WAVEPROBE gx=4 gy=2 -> gy=1 stop=nil
WAVEPROBE gx=5 gy=3 -> gy=2 stop=nil
WAVEPROBE gx=1 gy=0 -> gy=0 stop=edge_top
WAVEPROBE gx=3 gy=0 -> gy=0 stop=edge_top
WAVEPROBE gx=6 gy=1 -> gy=0 stop=nil
WAVEPROBE gx=1 gy=1 -> gy=1 stop=pawn
WAVEPROBE gx=4 gy=1 -> gy=0 stop=nil
WAVEPROBE gx=5 gy=2 -> gy=1 stop=nil
WAVEPROBE gx=6 gy=0 -> gy=0 stop=edge_top
WAVEPROBE gx=1 gy=0 -> gy=0 stop=edge_top
WAVEPROBE gx=4 gy=0 -> gy=0 stop=edge_top
WAVEPROBE gx=3 gy=0 -> gy=0 stop=edge_top
WAVEPROBE gx=1 gy=1 -> gy=1 stop=pawn
WAVEPROBE gx=5 gy=1 -> gy=0 stop=nil
WAVEPROBE gx=6 gy=0 -> gy=0 stop=edge_top
WAVEPROBE gx=3 gy=0 -> gy=0 stop=edge_top
WAVEPROBE gx=1 gy=0 -> gy=0 stop=edge_top
WAVEPROBE gx=5 gy=0 -> gy=0 stop=edge_top
WAVEPROBE gx=4 gy=0 -> gy=0 stop=edge_top
WAVEPROBE gx=1 gy=1 -> gy=1 stop=pawn

The Wave mechanic itself is working—pawns do move up each cycle. But in the lab scenario, they stack at row 0 after the first sweep, and then subsequent waves just pin everything against the top edge since there's nowhere left to go. After a couple of cycles, the entire board gets jammed and nothing can move anymore.

In real play this wouldn't happen because pawns march down between waves (they're 16 beats apart), so they'd naturally spread out. But in the lab with `nth_beat, supply = 6`, the wave fires almost constantly—the counter gets pre-armed so it triggers nearly every cycle, and with only about a second of simulation running between cycles, there's barely time for one march beat. So pawns get shoved to row 0 by the wave, then immediately get shoved again before they can march back down, trapping them at the top.

Looking at the probe data though, the push mechanic itself works fine—I can see the gy values shifting correctly (1→0, 2→1, 3→2) when there's nothing blocking. The real issue is that the lab scenario has everything already jammed at row 0 from the constant wave pressure, which masks whether the actual effect is working. The user's complaint about pawns not moving back 1 is probably just the lab's staging artifact, not a genuine bug in the mechanic. needs to be fixed. The wave mechanic itself works fine when pawns have space to move, which they do in real play since they're spread across the board by the time it fires. The issue is purely in the lab scenario — it needs to stage pawns with room above them, just like the defense and push test scenarios do, rather than relying on random placement.

Let me verify this by running a real-play test with wave enabled and a probe to count how many wave pushes actually move versus get blocked, which will…

     50 stop=nil
     16 stop=edge_top

In real play, most wave pushes move freely while only a handful hit the top edge when pawns are already positioned there—the mechanic itself is working as intended. The actual problem is the F7 lab scenario, where the wave configuration spawns pawns directly into rows 0–3 using the supply function, leaving them already crushed against the top before they can move.

The fix is to give those lab scenarios proper staging by placing pawns in the lower half of the board so they have visible distance to travel upward. I notice the `chequered_flag` scenario has the same issue, so whatever solution I implement should handle both. Let me examine how the supply function works and see if I can add explicit row placement options.

Examining the supply function...…

440      end
441     if FXLAB.item_id == 'egg' then
442       -- once the ally hatches, give it something to trade with
443       fx_after(2.2, function()
444         for _, p in ipairs(pawns) do
445           if p.friendly then
446             if p.gy >= 2 and not pawn_at(p.gx, p.gy - 2) then fx_pawn(p.gx, p.gy - 2) end
447             return
448           end
449         end
450       end)
451     end
452   end,
453 }
454 
455 -- landings: skulls swept (Broom), a skull eaten (Helmet), a drop detonated
456 -- (Dynamite)
457 FX_T.on_land = {
458   period = 3.0,
459   setup = function(sc) fx_clear(); fx_knight(3, 5) end,
460   trigger = function(sc)
461     FXLAB.cyc = FXLAB.cyc + 1
462     local tx, ty = fx_lcell()
463     if not tx then fx_knight(3, 5); tx, ty = fx_lcell() end
464     if not tx then return end
465     if sc.skulls_ring then
466       local v = fx_pawn(tx, ty)
467       for _, d in ipairs({ {1,0}, {-1,0}, {0,-1}, {1,-1} }) do
468         local ax, ay = tx + d[1], ty + d[2]
469         if in_bounds(ax, ay) and not skull_at(ax, ay) and not pawn_at(ax, ay) then

416      end
417   end,
418 }
419 
420 -- every-N-beats procs: arm the beat counter, the next march fires it
421 FX_T.nth_beat = {
422   period = 3.0,
423   setup = function(sc)
424     fx_clear(); fx_knight(1, 6)
425     fx_companions(sc)
426     if sc.supply then fx_supply(sc.supply) end
427   end,
428   trigger = function(sc)
429     if sc.supply then fx_supply(sc.supply) end
430     -- `natural`: DON'T pre-advance the counter. Arming shows the proc on demand,
431     -- which is what the lab is for — but an item whose charge drives something
432     -- else (Cloud travels to its target over the charge, then arms, then fires)
433     -- is a different item when its counter keeps getting slammed to N-1 mid-run.
434     -- Those audition on their own cadence: the supply top-up is the whole driver
435     -- and the loop just keeps pawns on the board for it to hunt.
436     if not sc.natural then
437       local host = sc.arm or FXLAB.item_id
438       local def = ITEM_DEFS[host]
439       fx_arm_beats(host, (def and def.beat_max) or 12)
440     end
441     if FXLAB.item_id == 'egg' then

I need to add optional row bounds to the `fx_supply` function so wave and chequered_flag items can start lower and animate upward visibly. I'm modifying the function signature to accept `gy_min` and `gy_max` parameters, then setting those items to spawn in rows 3-6 instead of the default 0-3 range.

Writing Lua function... Simplifying the approach by using scalar fields `supply_lo` and `supply_hi` instead of a table, then updating the scenario definitions to pass these bounds directly to the fx_supply call.

Considering collision risks with the knight at (1,6) and pawn leakage off the bottom — the guard already prevents spawning on the knight, but I should use rows 3–5 instead of 3–6 to give pawns more time before they leak and cost health.

Actually, the wave pushes pawns upward each cycle, which prevents leaking entirely. So rows 4–6 work fine — pawns spawn in the lower-middle area, get pushed up by the wave, and climb toward the top. But here's the problem: fx_supply only adds pawns up to the limit, it doesn't remove them, so over many cycles everything accumulates at row 0 and the scenario never clears.

Wait, but in the real lab loop, pawns march downward each beat too. The wave fires every cycle (roughly 3 seconds = 3 beats), pushing back 1 row, while march moves them down 1 per beat — that's 3 down per cycle against 1 up from the wave. So they actually drift downward and leak off the bottom. Yet my fxsmoke probe showed them pinned at gy=0 across sweeps, which suggests the timing works out differently there — maybe the march interval and wave frequency balance out to near-zero net movement in that shorter test window.

The real issue is that the supply keeps spawning fresh pawns at rows 0-3, and those newly-spawned ones at the top show no stun effect while older ones lower down do move. That mixed signal makes it look like the effect isn't working if you're watching the top clump. The fix is to spawn the supply lower, at rows 3-6, so every pawn in view has room above it to actually demonstrate the effect. I'm adjusting the supply bounds now.…

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

     24 stop=nil

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

-- clean --
fxsmoke: ======== REPORT ========
fxsmoke: no errors
fxsmoke: 16 scored nothing (check these by eye): heart, clover, chick, snow, cloud, guardian_angel, wall, growing_heart, hourglass, shield, web, helmet, turtle, golden_heart, old_clock, conductor
fxsmoke: ========================
Shutting down...

replays: 8/8 passed
replays: 8/8 passed
 fx_lab.lua  |  89 ++++++++++++++++++---
 fxsmoke.lua |   5 ++
 main.lua    | 261 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 340 insertions(+), 15 deletions(-)

The user is only testing in the lab environment, so my fix didn't actually solve their problem. I'm realizing the difference now — my probe ran in fxsmoke which showed all stop values as nil after the fix, but fxsmoke isn't the same as the real F7 lab. The actual lab environment runs the full setup sequence and game loop with triggers every 3 seconds, which is a completely different execution path than what I tested.

I'm checking whether my fix even took effect in the real lab — the setup calls `fx_supply` with the scenario's supply values (3 to 6), which I did modify. The wave item definition should trigger `wave_sweep()` when fired, and my probe showed those calls happening. But if the sweep is running in fxsmoke and pawns are moving there, why would they stay in place in the real lab? The user said pawns get stunned but don't move back, so maybe I'm misunderstanding what the actual problem is.

Wait — could this be a rendering issue rather than a simulation one? The pawns' grid position might be updating correctly, but the sprite animation isn't playing. `push_slide_vfx` handles the hop animation, which works fine for Glove and other items. But if a pawn is already mid-hop from the march this beat and then the wave tries to start another hop, the second one would override the first — though that should still animate the pawn to the new cell. Let me reconsider whether `march_freeze` is active or if the lab is in some state where the march doesn't even run.

Actually, there's something critical here: `fxlab_frozen()` returns true when the lab is in grid mode, which halts the march and spawn clock. In scenario mode it runs normally. But there's another possibility — the user might be running an older version of the game. The lab has hot-reload for watched spans, but scenario tables are loaded at startup, so if they haven't restarted since my changes, they'd still see the old behavior.

Let me look at the actual probe output from before the fix — the pawns were moving in fxsmoke even then, so the simulation itself is working. Maybe the issue isn't the sim at all, but the visual representation.

That would match what the user is describing: stun stars appear but the pawns don't visually slide back. I need to check how `push_slide_vfx` works and whether it's properly retargeting a pawn that's already mid-hop from the march animation.

The key test is to verify whether the pawn's screen position actually converges to the new cell center after the sweep, or if it's getting stuck somewhere else.

Wait — I think I see the real issue now. If the march and wave both happen on the same beat, the pawn could be marching down one cell while simultaneously getting pushed back up by the wave, resulting in no net movement visually. The animation plays out but the pawn ends up where it started.

That would explain why it looks like nothing's happening. The card's intended effect is to push back one row every 16 beats, but in the lab where the wave fires every cycle, it's canceling out the march that just occurred in that same frame.

Let me actually run the lab headlessly to get real data instead of theorizing about this. The lab uses `fxlab_update` which requires FXLAB mode, and while `fxsmoke` gets close by calling the setup functions and driving its own loop, it's not quite identical to the actual lab environment.

The key difference I'm seeing: `fxsmoke` runs 60 steps per cycle (1 second), but the real lab uses a 3-second period. That means `fxsmoke` triggers the wave 3 times more frequently relative to the marches than the actual lab does. In the real lab with its 3-second cycle and ~0.85-1.0s beat timing, I'd expect about 3 marches per wave, with pawns drifting down 3 and up 1 per cycle—pushing them toward the bottom and causing leakage. With the new `supply_lo=3..6` spawning pawns lower, they'd drift even further down and leak off the bottom.

My fix should help, but the user says it's still not working. I'm wondering if they haven't actually restarted the game, or if the lab's `setup` only runs on entry—meaning my scenario-table changes wouldn't take effect until they re-enter the Wave scenario. Rather than keep guessing, I should reproduce the real lab's timing headlessly and measure what's actually happening. I'll write a probe that uses the lab's actual 3-second period instead of `fxsmoke`'s 1-second cycle and log the results.

Actually, I should check whether `wave` even reaches `on_fire` by looking at how `fx_arm_beats` works—it sets the beats counter, and then on the next march beat the item's handler should increment and fire. Let me trace through the beat logic in items.lua to see if something's resetting the beats counter before it can fire.…

5106:function push_slide_vfx(p, path, dx, dy, delay)
function push_slide_vfx(p, path, dx, dy, delay)
  local n   = #path
  local f   = push_juice_scale(n)
  local cx, cy = cell_center(path[n].gx, path[n].gy)
  local dur = PUSH_HOP_DUR*(1 + (n - 1)*PUSH_HOP_EXTRA)
  local px, py = cell_center(path[1].gx, path[1].gy)
  local function show()
    start_hop(p, cx, cy, PUSH_HOP_H*f, dur,
              function() push_lean(p, dx, dy, f) end, math.cubic_out)
    spring_pull(p.spring, 'main', 0.3*f)
    spawn_hit_effect(px, py, { s = 0.5*f })
    -- ⛔ A ONE-SQUARE SHOVE DOES NOT SHAKE. With Glove alone every strike pushes,
    -- so a shake here would mean the screen never sits still for the whole run.
    -- The camera is what the Force LADDER buys — it starts at two squares.
    -- ⚠ ONCE PER EVENT, like the sound. shake_trauma APPENDS an instance and the
    -- camera sums them, and the mass pushers shove a pawn at a time: 🌊 Wave
    -- moves every pawn on the board and 🔊 Subwoofer a ring of eight. At +2 Push
    -- that is twenty stacked 0.36 traumas from one beat, which is not a rumble,
    -- it is the screen coming apart. One shove's worth of camera per event is
    -- the honest amount — the event is what the player perceives, not each pawn.
    if n > 1 and not push_shake_done then
      push_shake_done = true
      shake_trauma(main_camera.shake, 0.12*(math.min(n, PUSH_JUICE_CAP) - 1), 0.12)
    end
  end
  if delay and delay > 0 then timer_after(game_timer, delay, show) else show() end
  return (delay or 0) + dur
end

... [17 more lines]

I'm checking whether `start_hop` has a guard that prevents it from being called multiple times on the same pawn—because if a pawn is already mid-hop from the march, calling `start_hop` again to retarget it to the pushed cell could cause issues or unexpected behavior.…

function start_hop(e, tx, ty, height, dur, on_land, ease)
  e.from_x, e.from_y = e.x, e.y
  e.to_x,   e.to_y   = tx, ty
  e.hop_h, e.hop_dur, e.hop_t = height, dur, 0
  e.hopping = true
  e.on_land = on_land                        -- fired when the arc completes
  e.hop_ease = ease                          -- nil = linear
end

function knight_land()
  sfx(sounds.landing, volumes.landing)
  sfx(sounds.footstep, volumes.footstep)   -- horse footstep on landing
end

function update_hop(e, sdt)
  if not e.hopping then return end
  e.hop_t = e.hop_t + sdt
  local u = e.hop_t/e.hop_dur
  if u >= 1 then
    e.hopping, e.z = false, 0
    e.x, e.y = e.to_x, e.to_y
    spring_pull(e.spring, 'main', 0.12)      -- landing squash
    if e.on_land then e.on_land() end
    -- drain a queued chain hop (the knight's follow-up captures); when the
    -- queue empties the chain is over and control unlocks
    if e.hop_queue and #e.hop_queue > 0 then
      local h = table.remove(e.hop_queue, 1)
      start_hop(e, h.tx, h.ty, CHAIN_HOP_H, CHAIN_HOP_DUR, e.on_land)
    elseif e.chaining then
      e.chaining = false
... [1 more lines]

The issue is that `start_hop` has no guard preventing it from being overridden, so when the wave fires, it cleanly retargets the animation from the pawn's current position to the pushed cell. But there's a timing problem: the march hop starts on the same frame as the wave, so `e.x, e.y` still holds the pawn's original cell center before the hop animation has progressed, which gets captured as the wave's starting point.

This creates a sequence where the march moves the pawn down one cell and the wave immediately pushes it back up to where it started — both animations happen in the same beat, and since the march animation hasn't visually advanced yet, the two movements cancel out completely. The pawn ends up exactly where it began, which matches what the user is seeing: pawns getting stunned without any visible backward movement.

The real question is whether this is intentional design or a bug. The Wave card is supposed to push the board back one row every 16 beats, which is a real mechanical effect — the board doesn't advance that turn. But visually it looks like nothing happened, which feels wrong. I need to decide if the fix should be to make the wave push further, fire at a different time, or show both movements sequentially so the player actually sees the march and then the shove. This is a design decision that needs input before I can proceed.

Let me set up some instrumentation to verify what's actually happening — I'll track each pawn's position at the start of the march, then check again after the wave fires to see if they're truly canceling out or if something else is going on.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

WAVEPROBE gy 4->3 | pos(165,112) hopping=true | hop 165,112 -> 165,112 | dist=0.0
WAVEPROBE gy 4->3 | pos(195,112) hopping=true | hop 195,112 -> 195,112 | dist=0.0
WAVEPROBE gy 5->4 | pos(165,142) hopping=true | hop 165,142 -> 165,142 | dist=0.0
WAVEPROBE gy 5->4 | pos(225,142) hopping=true | hop 225,142 -> 225,142 | dist=0.0
WAVEPROBE gy 6->5 | pos(315,172) hopping=true | hop 315,172 -> 315,172 | dist=0.0
WAVEPROBE gy 7->6 | pos(255,202) hopping=true | hop 255,202 -> 255,202 | dist=0.0
WAVEPROBE gy 3->2 | pos(165,112) hopping=false | hop 165,112 -> 165,82 | dist=30.0
WAVEPROBE gy 3->2 | pos(195,112) hopping=false | hop 195,112 -> 195,82 | dist=30.0
WAVEPROBE gy 4->3 | pos(165,142) hopping=false | hop 165,142 -> 165,112 | dist=30.0
WAVEPROBE gy 4->3 | pos(225,142) hopping=false | hop 225,142 -> 225,112 | dist=30.0
WAVEPROBE gy 5->4 | pos(315,172) hopping=false | hop 315,172 -> 315,142 | dist=30.0
WAVEPROBE gy 6->5 | pos(255,202) hopping=false | hop 255,202 -> 255,172 | dist=30.0
WAVEPROBE gy 2->1 | pos(165,82) hopping=false | hop 165,82 -> 165,52 | dist=30.0
WAVEPROBE gy 2->1 | pos(195,82) hopping=false | hop 195,82 -> 195,52 | dist=30.0

I've found the root cause — when the wave triggers on a march beat, it's catching pawns mid-hop before their positions have actually updated on screen. The pawn's internal grid position changes but `p.x` and `p.y` remain at the old coordinates, so the hop distance calculates to zero and nothing animates.

The twist is that the wave stuns every pawn it hits, which means those stunned pawns skip their next march cycle. So on the following beat, when they're no longer hopping, the wave can push them normally with visible displacement — that's why the later lines show `hopping=false` and proper distances.

The core problem is that when a pawn marches and gets hit by the wave on the same beat, the two movements perfectly cancel out, leaving the pawn where it started with no visible animation. Mechanically it works (the wave bought exactly one beat of tempo as intended), but visually it looks broken.

The fix could be purely visual: let the march animation play through to completion, then queue the wave's push animation to happen afterwards, so the player sees the pawn step down and then get shoved back. So the fix is to delay the wave's `show()` call until after the march hop completes — by then `p.x,p.y` will be the marched cell, making the wave's origin different from its target and creating visible movement. I need to find the march hop duration and pass it as the `show_delay` parameter, which is exactly how Subwoofer already handles this. Option (a) is the right approach: it's purely presentational, uses existing mechanisms, and doesn't require mechanical changes to the card.…

4072:  start_hop(py, nx, ny, KNIGHT_HOP_H, KNIGHT_HOP_DUR)   -- no landing sfx (would spam per beat)
5113:    start_hop(p, cx, cy, PUSH_HOP_H*f, dur,
5614:  start_hop(p, cx, cy, 26, 0.22)
6062:          start_hop(p, cx, cy, HOP_H, HOP_DUR) -- arc toward the new cell
6493:      start_hop(p, cx, cy, HOP_H, HOP_DUR)   -- flies back: reads as the strike knocking it
6510:      start_hop(p, cx, cy, HOP_H, HOP_DUR)
=== hop consts ===
206:HOP_DUR        = 0.18     -- pawn hop duration
208:KNIGHT_HOP_DUR = 0.13     -- ...over its move (snappy, not floaty)
210:CHAIN_HOP_DUR  = 0.09     -- ...and snap faster than the committed move
238:STRIKE_HOP_DUR = 0.13     -- out, and back again
3632:WALL_HOP_DUR  = 0.16
5043:PUSH_HOP_DUR = 0.13

I need to pass `HOP_DUR` as the `show_delay` parameter to `wave_sweep` so the shove animation waits for the march hop to complete, matching how Subwoofer handles its knight hop timing. Now I'm implementing the loop that pushes and resolves each piece in the order.…

function flag_wave()
  local light, dark = {}, {}
  for _, p in ipairs(pawns) do
    if not p.friendly and not p.item then
      if square_is_light(p.gx, p.gy) then light[#light + 1] = p else dark[#dark + 1] = p end
    end
  end
  for _, p in ipairs(light) do push_damage(p, 1, 'chequered_flag') end
  table.sort(dark, function(a, b) return a.gy < b.gy end)
  for _, p in ipairs(dark) do push_and_resolve(p, 0, -1, 'chequered_flag') end
  sfx_any('capture_impact', 2)
end

-- 🎈 BALLOON: a lift is a Push UP, held for BALLOON_BEATS beats. The state
-- rides the pawn, so Brick chips it on every row it rises past — a synergy
-- nobody designed, found by the keyword doing its job.
BALLOON_BEATS = 2
function balloon_lift(p)
  if not p then return end
  p.balloon = BALLOON_BEATS
  local cx, cy = cell_center(p.gx, p.gy)
  emoji_puff(cx, cy - 10, balloon_img, 5, 30, 70, 0.3, 0.5)
end

-- Ticked on the beat (inside march_pawns' item emit, so it is recorded).
function balloons_tick()
  local lifted = {}
  for _, p in ipairs(pawns) do
    if (p.balloon or 0) > 0 and not p._gone then lifted[#lifted + 1] = p end

I'm noticing `flag_wave` has the same issue — it's calling `push_and_resolve` without a show_delay from within a march_beat handler. I should fix both of these, and while I'm at it, check if `balloons_tick` has the same problem since it also pushes elements up from a march_beat context. Let me search for all `push_and_resolve` calls happening inside march_beat handlers that are missing delay parameters.…

function balloons_tick()
  local lifted = {}
  for _, p in ipairs(pawns) do
    if (p.balloon or 0) > 0 and not p._gone then lifted[#lifted + 1] = p end
  end
  table.sort(lifted, function(a, b) return a.gy < b.gy end)
  for _, p in ipairs(lifted) do
    p.balloon = p.balloon - 1
    push_and_resolve(p, 0, -1, 'balloon')
  end
end

-- 🐈 CAT: a summon that pounces the pawn nearest a SIDE edge and bats it off,
-- capturing it. The owner's founding observation for the whole archetype — the
-- bat is Banana Peel's rule performed unconditionally, so it captures whatever
-- the pawn's health and whether or not Banana Peel is owned (law 2).
CAT_PX = 22
function spawn_cat()
  cat = { x = BOARD_X - 18, y = BOARD_Y + BOARD_SIZE*SQUARE - 14,
          home_x = BOARD_X - 18, home_y = BOARD_Y + BOARD_SIZE*SQUARE - 14,
          spring = spring_new(), timer = timer_new(), z = 0, hopping = false,
          bump_x = 0, bump_y = 0 }
  item_pulse_id('cat')

I'm seeing the same issue across three animation handlers — `wave_sweep`, `flag_wave`, and `balloons_tick` — where pawns get pushed back on a march beat without accounting for the march animation delay. The fix is consistent: pass `HOP_DUR` as the `show_delay` parameter so the shove animation starts after the march hop completes, rather than canceling it out. Now I'm implementing this across all three sites.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

      6 travel=27.8
     12 travel=30.0
=== balloon ===
      1 travel=27.8
      2 travel=30.0
=== flag ===
      4 travel=27.8

Every slide is now moving the expected distance—either a full 30 pixels or around 27.8 pixels when a piece is still mid-animation. The fix eliminated all instances of zero travel, bringing it from 6 out of 18 slides down to zero. Let me clean up the test code and do a final check.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fx_lab.lua:1700:-- ⛔⛔ THE LIVENESS PROBE MUST COME FIRST, AND IT MUST BE THE os.execute ONE.
-- clean --
fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed

The user wants to remove the delay and make the push affect 2 squares instead of 1. I need to figure out whether this applies just to Wave or to all three animations I modified earlier—the instruction says "Now for Wave" but I applied the delay fix to all three, so I should probably clarify the scope before making changes. The fix works because 2 squares breaks the cancellation that makes them invisible—the pawn moves down 1 and gets pushed up 2, creating net upward motion. But changing Balloon to 2 squares alters its card's power (a lift becomes stronger), and same for Chequered Flag (dark squares get pushed further), so these are design decisions that need asking about rather than deciding silently. I'll apply the no-delay, 2-square fix to Wave as he said, then ask whether flag and balloon should also go to 2, or if he'd rather keep the delay on them to preserve their original mechanics.

Actually, reverting the delay on those two and leaving them at 1 just restores the pre-existing shipped behavior—that's not a regression, just flagging the invisibility issue for his decision. Now I need to figure out how to implement the 2-square distance: I could add an optional distance parameter that threads through the push functions, or call the push logic twice.

The second approach won't work because the direction has to be a unit vector—passing a dy of -2 would skip cells, violating the rule that entering a square means entering it. So I need to add a distance override parameter to both `push_pawn` and `push_and_resolve`, defaulting to whatever `push_distance()` returns, but allowing Wave to specify 2 instead. The tricky part is making sure this override takes precedence over Curling Stone's global distance setting.

Actually, I should reconsider: Curling Stone should still apply its effect even when Wave is pushing. So instead of a hard override, I need Wave to set a base distance of 2, and then let the normal modifiers like Curling Stone stack on top. I'm refactoring `push_distance` to accept an optional base parameter that defaults to 1, so Wave can pass 2 and still get the Curling Stone multiplier applied.

Writing the refactored function... Setting `WAVE_PUSH = 2` for the wave's push distance, so when a wave triggers `push_and_resolve`, it passes that base value down. The Locomotive recursion still defaults to base 1 when called without an explicit base, which is correct since a wave-transferred locomotive push should use the standard strength. Partial moves are already handled by the path accumulation, so even if a pawn can't move the full 2 squares, it'll stop at the edge.

Visually, a pawn at row 4 gets pushed up 2 squares by the wave, traveling from the center of row 4 to row 3 — a 30-pixel movement that's clearly visible. The net effect per beat is the pawn moving 1 row up, creating a real sweep across the board. I should also check the wave's description text in the items file to see if it mentions pushing back 1 square, and update that if needed. Then I'll consider whether to apply the 2-square push to other items like the chequered flag and balloon.…

1032   -- ── the `[f]` RETROFITS: items whose effect always was a Push ──────────────
1033      item_def{ id = 'wave', name = 'Wave', weight = 2, img = wave_img, beat_max = 16,
1034                tags = { 'tag_board', 'tag_beat', 'tag_force' },
1035                desc = 'Every 16 beats, a wave sweeps the board, Pushing every pawn back.',
1036                on = { march_beat = counter_tick },
1037                on_fire = function(it) wave_sweep() end }
1038    
1039      -- The Parity/Force bridge: LIGHT = violence, DARK = greed bent into one beat.
1040      item_def{ id = 'chequered_flag', name = 'Chequered Flag', weight = 2, img = flag_img,
1041                beat_max = 8, tags = { 'tag_parity', 'tag_beat', 'tag_force' },

4823:function push_distance()
4857:-- Move `p` up to push_distance() squares along (dx, dy). `src` names the item
4864:  local dist = push_distance()
5057:-- 💪 THE SHOVE SCALES WITH ITS DISTANCE. push_distance() is 1 + stats.push, so
5063:-- Scaled by squares actually TRAVELLED, not by push_distance(): a four-square
7782:-- ⛔ NOT scaled by push_distance(). The shove's length is already spent by the

I'm checking whether `push_distance()` is safe to modify since it's only called from `push_pawn`. The card description says "Pushing every pawn back…

147:-- PUSH — the Force archetype's verb AND its stat (Chain's precedent, so
148:-- "+1 Push" needs no extra rules text). "Enters each square like a pawn
149--- marching there" is the load-bearing clause: it is what makes every
150--- entry-triggered terrain aimable, so a Flame + Glove is a combo with no item
151:-- between them. ⚠ A Push that cannot continue "is stopped", NEVER "blocked" —
152--- Block is the life-loss keyword and the two must not share a word.
153:gloss{ id = 'push', title = 'Push', cs = true, mech = true,
154:       forms = { 'Push', 'Pushes', 'Pushed', 'Pushing' },
155:       desc = "Move a pawn one square in a stated direction, and one more per point of Push, without it marching. It moves square by square and stops at an occupied square or the board's edge. A Pushed pawn enters each square like a pawn marching there; Frozen and Stunned pawns can be Pushed." }
156-
157--- ── archetype tags (item cards only) ────────────────────────────────────────
158--- The draft's color wheel, from endgame_design.md §Archetypes, as hoverable
159--- entries. Ids are `tag_` prefixed and carry NO `forms`: they never match body
160--- text, they are only reachable from an item card's tag row.
161---

The glossary defines Push as moving a pawn one square plus one additional square per point of Push, so if a card creates a 2-square push effect, it needs to explicitly state that in the card text rather than relying on the keyword alone. The wave card currently just says "Pushing every pawn back" without specifying the distance, which creates a contradiction—it should clarify "Pushing every pawn back two squares" to align with how the keyword actually works.

I need to update the wave implementation to thread through the 2-square distance, revise the card description to state this explicitly, update the items catalog entry to match, and revert the delay changes on wave, chequered flag, and balloon. There's also a question about the flag and balloon mechanics I should flag for review. For the wording, I'll keep it minimal and conservative since card text is game content with its own conventions, and let the user review it rather than overthinking the prose.

Now I'm working through the implementation details — threading a base parameter through push_distance and push_pawn is the right approach rather than calling push twice (which would trigger stun and rider effects twice) or using a global variable (which would be unsafe with recursion). I need to update the function signatures to pass the base distance through the call chain.…

4818 end
4819    
4820    -- Distance in squares: 1, plus the Push stat ladder (Muscle +1 / Iron Arm +2).
4821    -- 🥌 CURLING STONE turns the ladder off entirely — a Pushed pawn slides until
4822    -- something stops it, so the board's own geometry becomes the whole item.
4823    function push_distance()
4824      if items_enabled and owned_set['curling_stone'] then return BOARD_SIZE end
4825      return 1 + (stats.push or 0)
4826    end
4827    
4828    -- Cascade guard: Locomotive transfers a Push to whatever stopped it, and with
4829    -- Curling Stone every transfer slides too (ruling 15 — blessed, it is three

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\items.lua has been updated successfully. (file state is current in your context — no need to Read it back)

354:- 🌊 **Wave** [Board, Beat, Force] — "Every 16 beats, a wave sweeps the board, Pushing every pawn back." *(`[f]` retrofit: lowercase pushing → the keyword, "one row" dropped — distance is the keyword's, so Muscle and Iron Arm scale the sweep.)*

The file E:\a327ex\ABAgames\knightvspawns\items_catalog.md has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

      9 SLIDEPROBE n=2 travel=60.0
      6 SLIDEPROBE n=2 travel=30.0
      2 SLIDEPROBE n=1 travel=30.0

I'm tracking the animation behavior across different slide scenarios: most slides show the full 2-square displacement at 60px, but there's a subset where pawns moved partway and got pushed back, creating a net 1-square movement visible at 30px, plus a couple cases where pieces got blocked after just 1 square.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

3754:  start_hop(wall, nx, ny, WALL_HOP_H, WALL_HOP_DUR)
4072:  start_hop(py, nx, ny, KNIGHT_HOP_H, KNIGHT_HOP_DUR)   -- no landing sfx (would spam per beat)
4075:  resolve_capture(cap_enemy, KNIGHT_HOP_DUR)   -- scores; bursts when the pony lands
4424:  resolve_hit(best, KNIGHT_HOP_DUR)
4721:  start_hop(a, cx, cy, HOP_H, HOP_DUR)
4722:  start_hop(b, cx, cy, HOP_H, HOP_DUR)
5440:    push_and_resolve(e.p, e.dx, e.dy, 'subwoofer', KNIGHT_HOP_DUR)
5799:        start_hop(s, cx, cy, HOP_H, HOP_DUR)    -- same arc as a marching pawn
6036:              start_hop(ally, cx, cy, HOP_H, HOP_DUR)
6087:          start_hop(p, cx, cy, HOP_H, HOP_DUR) -- arc toward the new cell
-- clean --
fxsmoke: no errors
replays: 10/10 passed
replays: 10/10 passed

The user is asking for a design approach rather than code, so I should walk through the strategy first. I need to understand how the fire system works in the codebase since they're using it as a reference for how the wave should behave.…

382:FIRE_BEATS     = 2        -- beats the knight's landing square stays on fire (Fire item)
461:  { 'fire',    outline = true },          -- Fire's ember particles (outlined, IN FRONT of the pieces)
1640:-- moved emits nothing, it just remembers the tick as a HOLD. When motion
2862:  embers = embers or {}
2863:  for i = #embers, 1, -1 do embers[i] = nil end
2874:  fire_vis = {}
2955:  fires, fire_vis, fire_emit_t = {}, {}, 0
3250:    spawn_ember_burst(cx, cy, 10)
4563:function decay_fires()
4988:--   A small ember puff, and trauma an order under Boom's 1.35 (which is the
4996:-- the embers are the thing that took it apart.
5001:  spawn_ember_burst(x, y, ROCKET_BLAST_EMBERS)
5761:  spawn_ember_burst(cx, cy, 6)
5878:    freeze_held = freeze_flavor                        -- remember WHICH freeze, for the release
6826:    spawn_ember_burst(p.x, p.y, 14)   -- the pawn erupts in a burst of rising embers
7761:--   2. BANANA_HANG later gravity remembers it exists, and it drops out of frame
8207:-- ember — a fire particle in the FAKE-Z system (Super Emoji Invaders' fire_particle,
8210:-- yellow -> red, with a small ground shadow that shrinks as it climbs. Own `embers`
8217:FIRE_RISE = 130          -- rising-ember upward acceleration (px/s^2)
8218:embers = {}
8219:ember = class()
8221:function spawn_ember(x, y, o)
8222:  local e = ember(x, y, o or {})
8223:  embers[#embers + 1] = e
8227:function spawn_ember_burst(x, y, n)   -- a puff of rising embers (ignition / a pawn burning)
8228:  for k = 1, n do spawn_ember(x + random_float(-4, 4), y + random_float(-3, 3)) end
8231:-- The base core: low, barely-climbing embers; smaller as `inten` drops so the
8233:function spawn_base_ember(x, y, inten)
8234:  spawn_ember(x, y, {
8242:function ember:new(x, y, o)
... [10 more lines]

8205 end
8206    
8207    -- ember — a fire particle in the FAKE-Z system (Super Emoji Invaders' fire_particle,
8208    -- ported): a small circle launched UP that accelerates skyward (fire rises — it's
8209    -- the water splash_drop with gravity reversed), holds then shrinks out, tweening
8210    -- yellow -> red, with a small ground shadow that shrinks as it climbs. Own `embers`
8211    -- list — shadow on deco, circle on the (non-outlined) fire layer. VFX only. No emoji.
8212    -- Two flavors, same class: RISING tongues (default — launch fast, accelerate
8213    -- skyward) and a low glowing BASE core (`o.vz_*`/`o.rise` small — barely climbs).
8214    -- Rising ones are only fed while the tile actually burns, so when it runs out they
8215    -- thin from the top first; the base keeps emitting (dimmer + fewer) through the
8216    -- fade, so the core dims out after — otherwise the fire cuts off oddly.
8217    FIRE_RISE = 130          -- rising-ember upward acceleration (px/s^2)
8218    embers = {}
8219    ember = class()
8220    
8221    function spawn_ember(x, y, o)
8222      local e = ember(x, y, o or {})
8223      embers[#embers + 1] = e
8224      return e
8225    end
8226    
8227    function spawn_ember_burst(x, y, n)   -- a puff of rising embers (ignition / a pawn burning)
8228      for k = 1, n do spawn_ember(x + random_float(-4, 4), y + random_float(-3, 3)) end
8229    end
8230    
8231    -- The base core: low, barely-climbing embers; smaller as `inten` drops so the
8232    -- core visibly dims out while the tile fades.
8233    function spawn_base_ember(x, y, inten)
8234      spawn_ember(x, y, {
... [55 more lines]

8680   layer_circle(fire_layer, self.x, self.y, 2.8, white())        -- white-hot core
8681    end
8682    
8683    function comet_ball:destroy() end
8684    
8685    -- Stream embers up from every burning tile (VFX; reads the deterministic `fires`
8686    -- map but never grng). `fire_vis` mirrors `fires` but OUTLIVES it by FIRE_FADE, so
8687    -- a tile that stops burning keeps shedding a dimming base core after its rising
8688    -- tongues (fed only while burning) have run out.
8689    FIRE_FADE   = 0.5        -- seconds a spent tile's base core keeps dimming out
8690    fire_vis    = {}         -- cell_key -> { fade }
8691    fire_emit_t = 0
8692    function update_fires(sdt)
8693      for k in pairs(fires) do                     -- live tiles: keep a visual, fade held at 0
8694        fire_vis[k] = fire_vis[k] or { fade = 0 }
8695        fire_vis[k].fade = 0
8696      end
8697      fire_emit_t = fire_emit_t + sdt
8698      local emit = fire_emit_t >= 0.035
8699      if emit then fire_emit_t = 0 end
8700      for k, v in pairs(fire_vis) do
8701        local burning = fires[k] ~= nil
8702        local cx, cy  = cell_center(k // 100, k % 100)
8703        if not burning then                        -- fuel gone: dim the base core out
8704          v.fade = v.fade + sdt
8705          if v.fade >= FIRE_FADE then fire_vis[k] = nil end
8706        end
8707        if emit then
8708          local inten = burning and 1 or math.max(0, 1 - v.fade/FIRE_FADE)
8709          if burning then                          -- rising tongues — only while it actually burns
... [15 more lines]

614:droplet_img          = image_load('droplet',          'assets/droplet.png')   -- its lobbed projectile + splash
2860:  splashes = splashes or {}
2861:  for i = #splashes, 1, -1 do splashes[i] = nil end
4195:-- fires. Every capture path routes here (direct + chain now; splash later).
4442:function boom_splash(gx, gy, icon)
4449:          -- src is the TRIGGERING item (Dynamite shares this splash with Boom),
5110:-- same problem and solves it the same way (on_hop_land in boom_splash).
5438:  -- playing early. Boom carries the identical split (boom_splash).
6301:  -- whose boom_splash removes up to 8 more pieces — and doing that inside a
8080:-- A water splash = droplet EMOJI PARTICLES flung up-and-out and pulled down by
8083:-- splash_drop — a water droplet in the FAKE-Z system (its own class, not an
8087:-- (z <= 0). Own `splashes` list — shadow on deco, sprite on effects. VFX only.
8088:splashes = {}
8089:splash_drop = class()
8091:function spawn_splash_drop(x, y, vx, vy, vz, gravity, px, r)
8092:  local e = splash_drop(x, y, vx, vy, vz, gravity, px, r)
8093:  splashes[#splashes + 1] = e
8097:function splash_drop:new(x, y, vx, vy, vz, gravity, px, r)
8108:function splash_drop:update(dt)
8119:function splash_drop:draw_shadow()
===
splash_drop = class()

function spawn_splash_drop(x, y, vx, vy, vz, gravity, px, r)
  local e = splash_drop(x, y, vx, vy, vz, gravity, px, r)
  splashes[#splashes + 1] = e
  return e
end

function splash_drop:new(x, y, vx, vy, vz, gravity, px, r)
... [42 more lines]

I'm zeroing in on the core design pattern here—the fire effect works by composing simple circular shapes rather than relying on sprite graphics, which is the key insight to generalize. Each particle has depth coordinates that affect its vertical position on screen, creating a layered depth illusion without true 3D rendering.

The system uses two distinct particle populations with different behaviors—fast-rising tongues and a slow-climbing core—layered together to read as fire rather than scattered confetti. The visual representation stays synchronized with the game state through a continuous emitter that runs on a fixed cadence, but the particles themselves fade out gradually after the state ends, giving the effect a natural tail. The particles shift color from yellow to red over their lifetime and follow a size curve that holds then shrinks, all rendered as primitives on their own layer in front of the board pieces.

Now I'm thinking through what makes a wave effect work with the same underlying principles.

A wave is fundamentally different from fire—it's not a persistent state tied to a location but rather a single transient sweep that travels up the board in under a second. Instead of a state map that triggers emitters at fixed positions, I need a travelling front with a y position that advances upward, and everything else derives from that moving line. The key visual trick is the crest—a horizontal band at the wave's leading edge that undulates rather than staying straight, which is what makes it read as water instead of a simple wipe. I'm thinking of using summed sine waves at different frequencies sampled across the x-axis to create that natural wobble. Then there's foam scattered at the crest itself, densest right at the front and thinning out behind it. A pure particle approach won't capture the wave's coherent crest line, so I need a hybrid: a drawn crest band (calculated per column from a height function) layered with particles for foam and spray. This is genuinely different from fire's all-particle architecture, and I should acknowledge that rather than forcing one system to do both jobs. I'm thinking through sampling the crest at sub-cell resolution to get smooth detail.

Building the column-bar rendering...

The wave's motion needs to feel natural — accelerating at first then slowing as it loses energy — and crucially, it should sync with the pawn animations so the wave reaches each row right when that pawn starts sliding. With the push happening instantly on the beat and slides taking around 0.13-0.2 seconds, the wave probably needs to traverse all 8 rows in about 0.35-0.5 seconds total. There's a tension here between the instant push mechanic and the wave's travel time that I need to think through.

For the visual palette, I'm using the named colors already in the codebase — fire will tween from yellow to red, and water should use the existing blue tones like `comet_blue` and `frost_glow` to keep the aesthetic consistent.

The interesting part is that this wave pattern could generalize beyond just water — if he wants to add a tornado later, the underlying structure would be the same: a traveling elemental made from stacked primitives with fake-Z depth, a parameterized shape function, particle emission, and cheap rendering. The tornado would just use rotating ellipses instead of a wave crest, but the skeleton stays identical.

That said, I shouldn't abstract anything yet. Two instances isn't enough to establish a real pattern; I'll build the wave bespoke first, then extract what actually repeats when the tornado gets implemented. Fire didn't get abstracted and that was the right call.

For the rendering layer, the wave needs to sit in front of the pieces like fire does, but it has to be translucent. The catch is that translucent effects need a non-outlined layer — the outline shader fills the whole silhouette black, which breaks transparency. Fire uses `fire_layer` which is non-outlined, and `frost_layer` is the designated translucent one, so the wave body should use that.

Wait, let me double-check the layer setup. Fire is marked as outlined, which works because the embers are opaque circles. A translucent wave can't go on an outlined layer, so it either needs `frost_layer` or a new non-outlined layer — that's a real constraint I need to keep in mind. Now the question is whether the wave should even be translucent, or if a solid pixel-art approach would work better.

Actually, dithering might be the way to go here — using a checkerboard pattern instead of alpha transparency. That's more authentic to pixel art, avoids the layer problem entirely since dithering is just opaque pixels, and fits the practical approach. The codebase already uses pattern-based dithering, so it's a natural fit. Though per-pixel dithering would be expensive, I could instead use three solid tones for the wave body, mid-band, and crest without any transparency at all. That's readable, very pixel-art, and much simpler to implement.

For the wave's interaction with the pawns, I'm thinking it should draw in front so the water visually passes over them — the crest would occlude just the pawn's feet as it moves, which sells the submersion effect without completely hiding the pieces.

On structure: the wave should be a full-width front with per-column height offsets to create that coherent crest motion. I need to remove the eight wave-emoji particles currently in `wave_sweep` and replace them with a proper `wave_fx` object that updates each frame like the fire system does — it spawns from the sweep, self-destructs when it leaves the top, and stays purely visual with no simulation reads.

The answer should cover what fire structurally is as a recipe, why the wave can't follow that same pattern since its crest is coherent and moves as a unit, then the practical approach to implement it. I'm confirming the layer stack and some key measurements: frost sits between the game pieces and fire effects, so a wave drawn on the frost layer will appear over the board but beneath the outline effects. The wave band should be around 8-12 pixels tall given the board dimensions, and it sweeps the entire height of the board—starting below and exiting above—covering roughly 240 pixels of travel. At 0.4 seconds that's quite fast, around 600 pixels per second, which works well since the pawns get pushed instantly on the beat, so the wave itself should move quickly to match that snappy timing.

For the actual timing sync, I'm weighing a few options: the wave could cross in about 0.25 seconds as a quick flash while the push slides happen immediately, or I could stretch it slightly to 0.3 seconds so the wave's crest reaches the middle of the board right as the pawns finish their movement slides—that gives a subtle visual lead that feels natural without being jarring.…

He's narrowing the scope to just the travelling crest with the two-sine height function and three flat tones—no foam or spray yet. He didn't explicitly address my questions about timing, occlusion, and dithering, so I should draft a design brief for the crest that covers those details. I'll name it `wave_fx` to avoid collision with the wave item, and it'll track elapsed time, duration, phase, and the computed front position. The lifecycle is straightforward: `wave_fx_start()` fires from `wave_sweep()` to replace the emoji particles, `wave_fx_update()` runs in the frame loop, and `draw_wave_fx()` renders it on the fire layer before clearing itself when done. For movement, the wave travels from below the board to above it using a quadratic easing curve that surges then decelerates.

Now I'm defining the wave surface itself by sampling columns across the board width and layering two sine waves with different frequencies and amplitudes, then shifting the phase over time so the ripples appear to move as the wave travels upward. The visual will use three color bands—a pale cyan crest at the top, a mid-tone section below it,  and a deeper color for the rest—with the band heights scaling down as the wave rises and dissipates. I'm considering whether to let the wave simply exit past the top of the board and get clipped by the viewport, rather than fading it out with transparency.

For the clipping, I'll constrain each bar's drawn segment to stay within the board's vertical bounds, which is straightforward arithmetic. On the interface side, I'm removing the emoji particle spawns from the wave sweep function while keeping the sound effects and screen shake intact.

Now I'm thinking through the layer ordering and styling — the fire layer sits in front of the game pieces, which is correct. Since everything on the board uses outlines for consistency, the wave band should too. The outline will trace the band's silhouette including its bottom and side edges, which actually helps define the wave's trailing edge and reads well with the game's visual style.

The staircase effect along the top edge from varying crest heights across columns is fine — the outline will trace that naturally and it's desirable. Now moving on to the functions... I could optimize by drawing each column as three stacked rectangles — 120 columns × 3 = 360 rects per frame, which is trivial at 60fps over 17 frames. I'll use WAVE_STEP = 2 for smoothness since the performance cost is negligible. Now I need to write up the brief as a conceptual map, keeping it predictable and clear without pseudocode, and make…

8692:function update_fires(sdt)
8923:  update_fires(sdt)                            -- stream embers up from burning tiles
10457:  for _, e in ipairs(embers) do e:draw_shadow() end     -- fire-ember shadows
10496:  for _, e in ipairs(embers) do e:draw() end        -- Fire's embers, IN FRONT of the pieces

10486      -- push, so the bracket only has to be open while the draws are queued —
10487     -- emoji_ring_layer's own layer_render happens later, inside emoji_render.
10488     camera_attach(main_camera, frost_layer)
10489     camera_attach(main_camera, emoji_ring_layer)
10490     for _, p in ipairs(pawns)            do draw_frost_cube(p) end
10491     for _, p in ipairs(captured_pending) do draw_frost_cube(p) end
10492     camera_detach(main_camera, emoji_ring_layer)
10493     camera_detach(main_camera, frost_layer)
10494   
10495     camera_attach(main_camera, fire_layer)
10496     for _, e in ipairs(embers) do e:draw() end        -- Fire's embers, IN FRONT of the pieces
10497     for _, e in ipairs(comet_balls) do e:draw() end   -- the falling comet + its tail
10498     camera_detach(main_camera, fire_layer)
10499   
10500     camera_attach(main_camera, effects_layer)
10501     -- effects_2 rides the same bracket: entities in `fxs` are free to draw into
10502     -- either, and a queue-time push needs its camera already attached. Detached
10503     -- together below, in reverse.
10504     camera_attach(main_camera, effects_2_layer)
10505     for _, p in ipairs(pawns) do                       -- above the pieces, under the FX

8918   collection_update(holes, sdt)
8919      collection_update(rising_stars, sdt)
8920      collection_update(shards, sdt)
8921      collection_update(comet_balls, sdt)
8922      update_angel_stars(dt)                       -- UNSCALED: the revive's build isn't slowed
8923      update_fires(sdt)                            -- stream embers up from burning tiles
8924      process_destroy_queue()   -- finalize killed fx (sets _dead so they get pruned)
8925    
8926      -- on-screen buttons: fire the one under the cursor on click (restart, new
8927      -- run, watch, back, save). Registered by the LAST draw; consuming the click
8928      -- suppresses move-commit this frame.
8929      local click_consumed = buttons_dispatch()

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

5488     if not p.friendly and not p.item then order[#order + 1] = p end
5489      end
5490      table.sort(order, function(a, b) return a.gy < b.gy end)
5491      for _, p in ipairs(order) do push_and_resolve(p, 0, -1, 'wave', nil, WAVE_PUSH) end
5492      for gx = 0, BOARD_SIZE - 1 do
5493        local cx, cy = cell_center(gx, BOARD_SIZE - 1)
5494        spawn_emoji_particle(cx, cy, wave_img, {
5495          velocity = random_float(90, 140), direction = -math.pi/2,
5496          duration = 0.5, scale = random_float(0.8, 1.1), flash_on_spawn = 0.2,
5497        })
5498      end
5499      sfx_any('capture_switch', 2)
5500      shake_trauma(main_camera.shake, 0.4, 0.2)
5501    end
5502    
5503    -- 🏁 CHEQUERED FLAG: the Parity/Force bridge. Light squares take a flat 1,

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

479:function math.quad_out(t) return -t*(t - 2) end
222:function math.clamp(value, min, max)
fxsmoke: no errors

The issue is that `fxsmoke` never calls `draw()`, so the wave drawing code never actually runs. I need to verify the geometry by computing what the draw function would produce at different `t` values and printing those from `wave_fx_update`, which does execute in headless mode. I'm checking that the `front` geometry spans correctly across the board boundaries.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

(Bash completed with no output)

The issue is that `wave_fx_update` isn't being triggered in fxsmoke because it runs its own loop without calling the standard `update()` method. I need to use `--verify=check` to run the…

(Bash completed with no output)

The wave_sweep function is definitely running during verification based on the debug output I saw earlier, so the issue must be that wave_fx_start isn't being called or wave_fx_update isn't executing in that path.…

37:-- the end of update() gated on VERIFY being non-nil.
213:-- Called at the END of update() so the bot commits after the frame's march /
216:function verify_update(dt)
219:  V.t = V.t + dt
240:    V.commit_t = V.commit_t - dt
252:    V.dead_t = (V.dead_t or 0) + dt

`verify_update()` runs at the end of `update()`, so my wave effects should be executing. The issue is likely that either `wave_fx_start()` never gets called in this replay, or my probe's gate condition isn't correctly checking for the `--waveprobe` flag in the parsed engine arguments.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

--- fxsmoke ---
4
--- verify ---
WAVEFX start

Looking at the debug output, `wave_fx_start` is being called but `wave_fx_update` never runs — the probe that should fire inside update() never prints. This suggests either the update function isn't being called at all, or `wave_fx` is nil when update tries to access it, which would cause a silent failure.

The verify harness might be replaying events in a way that skips the normal update loop — possibly calling march_pawns directly or fast-forwarding without running full frame updates. The fact that "WAVEFX start" printed only once across 3 replays is suspicious; in a normal run with wave granted, it should fire multiple times. Let me check how verify_update actually advances the replay to understand the execution path.

Actually, I'm overthinking this. The real verification I need is the draw arithmetic itself — the front interpolation, sine undulation, and clipping are pure math I can replicate in Python without…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

WAVEFX u=0.00 front= 259.0 crest=[ 253.9, 264.5] undulation=10.6 cols_visible=  0 px=0
WAVEFX u=0.06 front= 228.5 crest=[ 223.5, 233.9] undulation=10.5 cols_visible=120 px=2880
WAVEFX u=0.12 front= 199.9 crest=[ 194.9, 205.3] undulation=10.3 cols_visible=120 px=2880
WAVEFX u=0.18 front= 173.1 crest=[ 168.3, 178.5] undulation=10.2 cols_visible=120 px=2880
WAVEFX u=0.24 front= 148.3 crest=[ 143.5, 153.5] undulation=10.0 cols_visible=120 px=2880
WAVEFX u=0.30 front= 125.2 crest=[ 120.6, 130.4] undulation=9.8 cols_visible=120 px=2880
WAVEFX u=0.36 front= 104.1 crest=[  99.6, 109.2] undulation=9.6 cols_visible=120 px=2880
WAVEFX u=0.42 front=  84.8 crest=[  80.5,  89.8] undulation=9.3 cols_visible=120 px=2880
WAVEFX u=0.48 front=  67.4 crest=[  63.3,  72.3] undulation=9.1 cols_visible=120 px=2880
WAVEFX u=0.54 front=  51.9 crest=[  47.7,  56.9] undulation=9.2 cols_visible=120 px=2880
WAVEFX u=0.60 front=  38.3 crest=[  33.9,  43.3] undulation=9.4 cols_visible=120 px=2880
WAVEFX u=0.65 front=  26.5 crest=[  21.9,  31.5] undulation=9.6 cols_visible=120 px=2880
WAVEFX u=0.71 front=  16.6 crest=[  11.9,  21.5] undulation=9.6 cols_visible=120 px=2880

I'm verifying the geometry calculations for the water band animation—checking that the column visibility and positioning are correct across different parameter values, from the initial off-board state through the full animation sequence.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

removed bytes: 1041

-- clean --

function wave_fx_update(sdt)
  if not wave_fx then return end
  wave_fx.t = wave_fx.t + sdt
  if wave_fx.t >= WAVE_DUR then wave_fx = nil end
end

-- Height of the surface at screen-x `x`. Pure, so the draw and anything added
-- later (foam wants to be born ON this line) can never disagree about where the
-- water is.
=== sweeps ===
fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed

I need to adjust the wave duration since it's crossing the board way too fast at 0.28 seconds. The timing needs to fit within the beat interval of roughly 0.85-1.0 seconds, and the wave should finish before the next beat lands, otherwise it'll overlap with the next push. Let me figure out what duration actually works given these constraints.

The upper bound is around 0.8 seconds, but I should leave some margin, so something in the 0.55-0.7 second range makes sense. Going from 0.28 to 0.6 is more than doubling it, which feels like the right magnitude for "way too fast" rather than a small tweak. At 0.6 seconds, the wave still reads as a quick sweep across the board, not a slow crawl. The quad_out easing front-loads the motion, so the entry is the fastest part—doubling the duration would halve that initial speed from 30px per frame to around 15px, which is still snappy but more readable. I should go with 0.6 and mention the easing curve as a related dial if he wants even finer control over how the wave feels.…

function current_march_interval()
  local c = current_chunk()
  -- session cleanup beats (past the last chunk, board still clearing) hold the
  -- final chunk's pace — the next chunk's beat belongs to the next session
  if session_on() and c > session_run.last_chunk then c = session_run.last_chunk end
  return math.max(MARCH_MIN, chunk_table_at(CHUNK_BEAT_DUR, c + 1))
end

-- == the chunk director ======================================================

-- ── chunk geometry (owner restructure 2026-07-27) ────────────────────────────
-- Chunks are no longer uniform. The 1-2-SPIKE rhythm stays, but each chunk's
-- LENGTH is authored in CHUNK_LEN — spikes run 24, the middle chunk of each
-- triplet runs 16-18, the post-spike opener runs 12 — so a budget can be made
-- to land as a siege or a flood independently of how big it is. The chunk after
-- a spike additionally opens with SPAWN_LEAD_BEATS of authored silence, so the
-- player clears the spike's leftovers before the next wave starts.
SPAWN_LEAD_BEATS = 4    -- empty opening beats of a post-spike chunk

141:MARCH_MIN        = 0.4     -- the owner-set beat floor: the game never asks for sub-0.4s reads

So the wave needs to move much slower and actually recede back down like a real wave washing up a beach and retreating. The pawns should get pushed in sequence as the wave crest passes through each row, rather than all at once—he's looking for a stagger that's tied to the wave's visual movement, not a uniform delay that felt off-beat.

Now I'm thinking through the mechanics: the wave runs up to a peak near the top (not flying off-screen), then slowly recedes back down. The pushing happens during the upward phase as the crest passes each pawn's row, and on the way back down it doesn't push them again—that would undo the effect.

The key question is whether the wave needs to reach every row to push every pawn, or if it can peak partway and still affect all pawns. The safer interpretation is that it visually peaks near the top but still covers all eight rows mechanically, so every pawn gets pushed as intended.

For timing, since pushes are staggered by row and the simulation resolves all pushes immediately (only the visual animation is delayed), the last push must complete within the beat before other effects trigger. The stagger has to fit within the beat interval, and at the minimum march speed of 0.4s, a slow wave with sequential pushes would still be animating when the next beat hits — the pawn's slide would get interrupted by the next march, which is visually jarring. Since waves fire every 16 beats, this overlap could happen late game. I could scale the wave duration to the current beat interval, capping it at 70% of the march speed so the animation always completes before the next beat lands, which would also make the wave feel faster as the game accelerates.

The recede is purely visual and can safely extend past the beat since nothing depends on it — it's just a drawn band of water. The total wave lifecycle is the rise time plus optional hold plus the recede, where the recede can be slow and exceed the beat without issues. During the recede, the wave should thin out as it pulls back.

The crest still occludes pawns during the recede as it washes over them. I'm thinking a brief hold at the peak (around 0.05-0.1 seconds) would sell the effect of a real wave stalling at its furthest reach. For easing, the run-up should use quad_out to decelerate into the stall, while the recede needs something that captures how water actually drains — accelerating then slowing — so I'm leaning toward quad_in for the initial pull-back.

For the push stagger, I need to map each pawn's show_delay to the moment when the wave crest reaches that pawn's row. Since the crest position is a known function of time, I can invert it: for a pawn at a given row, I find the time when the wave front reaches that y-coordinate, then use that as the delay.

The math works out cleanly with the quad_out easing: I solve for the parameter u in the easing function such that the front position equals the target row, giving me a closed-form solution `u = 1 - sqrt(1 - k)`, then multiply by the rise duration to get the actual delay. This ensures each pawn starts moving precisely when the crest reaches its original row before being pushed upward.

The stagger tied to the wave's movement is a deliberate design choice that differs from a blanket delay, and I should flag whether the shake and sound should stay at the wave's breaking point or shift to the peak. Since this is a substantial change, I'll write up a design brief with the open questions and wait for feedback rather than committing to one direction.

I'm identifying the key decisions to surface: whether the wave pushes every pawn or only those it reaches, how to scale the timing against the beat floor, and whether the push happens only on the wave's run-up with the recede being purely visual. I'm also working out concrete timing numbers to propose—the wave up, hold, and down phases—with the peak positioned at the top row so the crest covers the full board.

The total animation runs about 1.4 seconds on screen, which means the recede overlaps into the next beat at 0.85 seconds. That's fine since it's just a visual band with no mechanical impact, though I should thin the band during recede to around 40% of its height so it looks like it's draining rather than sliding off intact. I need to write up the brief and clarify that all push resolution still happens on the beat inside wave_sweep—only the show_delay varies per pawn, keeping the simulation deterministic. The push function already has show_delay threaded through, so that's in place.…

I'm setting up the wave effect system with constants for duration, step size, and various wave parameters, then defining the core functions to initialize, update, and render the wave animation along with a helper to calculate the crest height at any position.

Now I'm refining the geometry—the wave starts below the board and peaks at the top row, but I need to adjust where the crest reaches so it actually intersects with the pawn centers rather than passing underneath them.

I'm calculating the arrival times for different rows using the wave's upward motion curve. Row 0 gets hit around 75% through the rise phase, while the bottom row experiences the effect much earlier at only about 5.5% of the rise time, which gives me the staggered timing I need.

The overall sequence spans roughly 0.02 to 0.34 seconds with the current timing parameters, creating a nice cascading effect. Now I'm setting up the wave front function to handle the three phases: the upward motion where the wave rises to its peak, a stall period where it holds, and then the receding phase where it drains back down while the band scale interpolates from full to the drain value.

Writing the wave front function... Finishing the wave arrival delay calculation with a square root easing function. Then I'm setting up the wave effect initialization, computing the upward duration from the current march interval and beat fraction, and starting to define the wave state object with timing and position parameters.

I need to verify that `current_march_interval()` is safe to call from `wave_sweep` — it reads chunk state deterministically without randomness, so it's fine even though `march_pawns` already uses it. The key issue is ordering: `wave_fx_start` needs to run before the pawn delays are computed, so I'm restructuring `wave_sweep` to call it first, then sort and process the pawns.

Restructuring wave_sweep... I need to make sure the delay is computed before the pawn's position changes, so I'll extract `wave_arrival_delay(p.gy)` into a local variable for clarity. But there's a timing question: the pawns are pushed top-down so they clear correctly, but the visual delays are bottom-first, meaning lower pawns animate before upper ones even though the simulation resolved them in the opposite order—I need to think through whether that creates a visual inconsistency. aves row 3 before A arrives. Let me work through the timing more precisely. I need to calculate when the wave crest reaches each row and when each pawn starts sliding. For row 5, the crest arrives around t=0.086s, and for row 3 I'm computing the exact arrival time using the same wave equation.

Once I have those times, I can figure out how long A's 2-square push takes—it depends on the push hop duration and extra delay per square. If A takes about 0.195s to slide and arrives at row 3 around t=0.281s, while B leaves at t=0.159s, then B clears the space well before A gets there. The real issue is that the wave crest travels much faster than the sliding animation, creating a significant gap between when the wave passes and when the pawn actually moves. At the top rows where the crest slows significantly, I'm checking the timing between adjacent rows. Row 1 to row 0 takes about 0.08 seconds for the crest to traverse, while a pawn's full 2-square slide takes 0.195 seconds — so a pawn starting at row 2 won't catch the crest before reaching row 0. I'm verifying the timing with the wave beat fraction calculation—at beat 0.85 the wave height caps at 0.45, and the last pawn's slide window extends from 0.34 to 0.535, which overshoots the available time.…

8710 WAVE_DUR    = 0.28    -- seconds to cross the whole board
8711    WAVE_STEP   = 2       -- px between column samples (~120 columns over 240px)
8712    WAVE_CREST  = 2       -- band thicknesses, top to bottom...
8713    WAVE_MID    = 4
8714    WAVE_DEEP   = 6       -- ...12px total, about a third of a square
8715    -- The surface: a long swell with a short chop summed on top. ⚠ TWO SINES, NOT
8716    -- ONE. A single sine is visibly periodic and reads as a decorative ribbon sliding
8717    -- up the board; summing a second at a different frequency and amplitude breaks
8718    -- the repeat and the eye accepts it as a surface.
8719    WAVE_SWELL_N, WAVE_SWELL_A = 1.5, 4.0    -- wavelengths across the board, px
8720    WAVE_CHOP_N,  WAVE_CHOP_A  = 5.0, 1.5
8721    WAVE_PHASE   = 7.0    -- rad/s the surface travels ACROSS the front as it climbs
8722    wave_fx = nil
8723    
8724    function wave_fx_start()
8725      wave_fx = { t = 0 }
8726    end
8727    
8728    function wave_fx_update(sdt)
8729      if not wave_fx then return end
8730      wave_fx.t = wave_fx.t + sdt
8731      if wave_fx.t >= WAVE_DUR then wave_fx = nil end
8732    end
8733    
8734    -- Height of the surface at screen-x `x`. Pure, so the draw and anything added
8735    -- later (foam wants to be born ON this line) can never disagree about where the
8736    -- water is.
8737    function wave_crest_y(x, front, phase)
8738      local w  = BOARD_SIZE*SQUARE
8739      local u  = (x - BOARD_X)/w
... [20 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

8798   return front
8799           + WAVE_SWELL_A*math.sin(u*WAVE_SWELL_N*2*math.pi + phase)
8800           + WAVE_CHOP_A *math.sin(u*WAVE_CHOP_N *2*math.pi + phase*1.7)
8801    end
8802    
8803    -- ⚠ CLIPPED TO THE BOARD'S ROWS, which is also how it disappears. The front runs
8804    -- from a band below the bottom edge to a band past the top, and each column is
8805    -- clamped to the playfield — so it enters and leaves the board rather than fading
8806    -- out, and no part of the first pass needs alpha.
8807    -- ⚠ quad_out on the travel: a wave surges in and spends itself climbing. Linear
8808    -- reads as a wipe.
8809    -- ⚠ Drawn per COLUMN, three stacked rectangles, top-down. layer_rectangle is
8810    -- TOP-LEFT (layer_image is centred), so each band's y IS its top edge.
8811    function draw_wave_fx()
8812      if not wave_fx then return end
8813      local top, bot = BOARD_Y, BOARD_Y + BOARD_SIZE*SQUARE
8814      local band     = WAVE_CREST + WAVE_MID + WAVE_DEEP
8815      local u        = math.clamp(wave_fx.t/WAVE_DUR, 0, 1)
8816      local front    = (bot + band) + ((top - band) - (bot + band))*math.quad_out(u)
8817      local phase    = wave_fx.t*WAVE_PHASE
8818      -- one band per column, each clamped into the playfield; a column whose whole
8819      -- band has left the board contributes nothing
8820      for x = BOARD_X, BOARD_X + BOARD_SIZE*SQUARE - WAVE_STEP, WAVE_STEP do
8821        local cy = wave_crest_y(x, front, phase)
8822        local y  = cy
8823        for _, seg in ipairs({ { WAVE_CREST, wave_crest }, { WAVE_MID, wave_mid }, { WAVE_DEEP, wave_deep } }) do
8824          local y0 = math.max(y, top)
8825          local y1 = math.min(y + seg[1], bot)
8826          if y1 > y0 then
8827            layer_rectangle(fire_layer, x, y0, WAVE_STEP, y1 - y0, seg[2]())
... [2 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

grep: main.lua: No such file or directory
-- no stale WAVE_DUR above --

-- clean if empty --
fxsmoke: no errors

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

5064:PUSH_HOP_EXTRA = 0.5
WAVEFX beat=1.00 up=0.450 total=1.41
  t=0.00 front= 259.0 band=1.00
  t=0.10 front= 159.4 band=1.00
  t=0.20 front=  84.8 band=1.00
  t=0.30 front=  35.0 band=1.00
  t=0.40 front=  10.1 band=1.00
  t=0.50 front=   7.0 band=1.00
  t=0.60 front=   9.5 band=0.94
  t=0.70 front=  18.2 band=0.87
  t=0.80 front=  33.2 band=0.81
  t=0.90 front=  54.3 band=0.74
  t=1.00 front=  81.7 band=0.67
  t=1.10 front= 115.3 band=0.61
  t=1.20 front= 155.1 band=0.54
  t=1.30 front= 201.2 band=0.47
  t=1.40 front= 253.4 band=0.41
  row 7 cy=232 starts=0.025 ends=0.220
  row 6 cy=202 starts=0.054 ends=0.249
  row 5 cy=172 starts=0.086 ends=0.281
  row 4 cy=142 starts=0.121 ends=0.316
  row 3 cy=112 starts=0.160 ends=0.355
  row 2 cy= 82 starts=0.205 ends=0.400
  row 1 cy= 52 starts=0.260 ends=0.455
  row 0 cy= 22 starts=0.340 ends=0.535

The animation curve shows a clear three-phase pattern: a rapid deceleration from 259 down to 7 over 0.45 seconds using quad_out easing, followed by a visible stall where the value hovers between 7 and 9.5 for about 0.2 seconds, then an accelerating drain back up to 253 over 0.9 seconds with quad_in easing that starts slow and picks up speed.

The stagger timing is precisely orchestrated — the bottom row starts at 0.025s while the top row begins at 0.340s, with the spacing between rows widening progressively (0.029 through 0.080 seconds) because the wave crest itself decelerates, naturally pushing each pawn into the sequence at the right moment.

The timing fits cleanly within the beat structure and the overlap check confirms no collisions — each pawn clears its destination before the next one arrives.…

removed bytes: 686

-- probes clean --
function wave_fx_start()
  local band = WAVE_CREST + WAVE_MID + WAVE_DEEP
  wave_fx = {
    t     = 0,
    up    = math.min(WAVE_UP, current_march_interval()*WAVE_BEAT_FRAC),
    -- from a band below the bottom edge, up to the crest sitting on the top row
    start_y = BOARD_Y + BOARD_SIZE*SQUARE + band,
    peak_y  = BOARD_Y,
  }
end

function wave_fx_update(sdt)
  if not wave_fx then return end
  wave_fx.t = wave_fx.t + sdt

fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed

The peak position needs to be adjusted downward so it doesn't reach quite so high—maybe around 15 pixels lower by setting it to something like `BOARD_Y + SQUARE*0.5`. But I need to check whether lowering the peak still allows the wave crest to properly reach row 0's center point.

If I set `peak_y = 19` (which is `BOARD_Y + 12`), the crest sits 12 pixels below the board's top edge, making the top row roughly half-submerged. This gives row 0 a delay factor of about 0.888 times the upward duration, which feels right—the wave reaches the top row but doesn't fully engulf it, creating that sense of the wave not quite reaching the far end.

The real issue is that the wave currently looks like a thin ribbon sliding upward because there's nothing drawn behind the crest. Once the band passes, the board is instantly empty again. I need to fill the region from the crest down to the bottom of the board with water that has actual wave-like visuals instead of just being transparent.

The challenge is making it look like water without completely obscuring the board and pawns underneath. I'm thinking horizontal ripple lines—thin lighter-blue streaks at different heights, each drifting with its own sine offset—layered over a mostly-empty interior. That would give it water surface texture while keeping the board visible beneath.

But he did say "instead of being transparent," which suggests he wants something filled in. A dithered checkerboard pattern in the wave color mixed with ripple lines might be the sweet spot—it reads as water, keeps the board partially visible through the dither pattern, and feels appropriately pixelated. The alternative would be drawing the pawns on top of a solid water fill, but that gets complicated with layering. I'm working through the performance trade-offs: a full dither pattern would create thousands of rectangles, which is risky at 60fps. Instead, I could use horizontal bands across the board width—just a few ripple-like stripes—which would be much cheaper to render while still conveying the water effect.

The best approach is to draw the inner region as a series of trailing ripple lines, each offset behind the main crest with its own phase and amplitude, progressively deeper in tone and fainter as they recede. This creates that sense of successive wave fronts moving through the water, keeps the board readable, and stays performant. The spacing between these ripples should increase with depth to enhance the perspective effect.

I can make this efficient by drawing both the crest band and the ripple segments in a single per-column loop, so I'll set up around 6 ripple lines with calculated depths below the crest.

Each ripple line gets its own phase offset to desync them, decreasing amplitude as they go deeper, and I'll alternate or fade the color from mid-tone to deeper tones. The ripples should stay clipped to the board boundaries and persist during the drain phase as the water recedes.

I need to define ripples as absolute offsets below the crest, so as the crest rises during run-up, more ripples become visible, and near the bottom they get clipped out. I'll also add a `WAVE_PEAK_INSET` parameter to position the peak a bit lower, then write a helper function to calculate the ripple surface height with its own amplitude and phase parameters.

Writing ripple helper function... Writing ripple rendering... The ripples would reach down to around y=109 at their deepest, but the board extends to 247, leaving a big empty gap at the bottom. For a wave running up a beach, the water should really fill all the way back, so I should extend the ripples further down to cover the full height.

I can increase the ripple count and adjust the spacing formula to make the last ripple reach the bottom edge. With 13 ripples using a gap of 7 and an exponent of 1.35, the math works out to reach around 240px at peak. That's about 1560 rectangles for the ripples plus 360 for the band — roughly 1900 per frame, which is manageable.

The wider spacing at the bottom actually works well visually — it suggests deeper, calmer water. I'll dial it back slightly to 12 ripples with a gap of 6 and the same exponent to keep things balanced.

Actually, let me try a simpler linear-ish progression instead. I can use a formula where the gap grows with each ripple index, something like depth_i = band + gap × i × (1 + i×0.09). Testing this with gap=7 shows that 15 ripples would reach about 249px, which hits the bottom nicely. That's 1800 rectangles total — still well within budget. I'll go with 14 ripples to be safe.

Wait, I'm overcomplicating this. Instead of calculating by index, I can just iterate the depth directly, starting with an initial step size and growing it exponentially as I go...

Calculating cumulative depths...

The spacing works out nic…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (note: the file had been modified on disk since you last read it — the edit applied cleanly, but the file contains other changes not in your context. Read it before edits that depend on surrounding content.)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

8808 end
8809    
8810    -- When does the crest reach row `gy`? The run-up is quad_out, so this inverts it
8811    -- in closed form rather than stepping or approximating:
8812    --   front = start + (peak - start)*(2u - u²)   =>   u = 1 - sqrt(1 - k)
8813    -- Both the drawn front and this delay come out of the same easing, which is what
8814    -- makes a pawn move exactly as the water arrives instead of near it.
8815    function wave_arrival_delay(gy)
8816      if not wave_fx then return 0 end
8817      local _, cy = cell_center(0, gy)
8818      local k = math.clamp((cy - wave_fx.start_y)/(wave_fx.peak_y - wave_fx.start_y), 0, 1)
8819      return wave_fx.up*(1 - math.sqrt(1 - k))
8820    end
8821    
8822    -- Height of the surface at screen-x `x`. Pure, so the draw and anything added
8823    -- later (foam wants to be born ON this line) can never disagree about where the
8824    -- water is.
8825    function wave_crest_y(x, front, phase)
8826      local w  = BOARD_SIZE*SQUARE
8827      local u  = (x - BOARD_X)/w
8828      return front
8829           + WAVE_SWELL_A*math.sin(u*WAVE_SWELL_N*2*math.pi + phase)
8830           + WAVE_CHOP_A *math.sin(u*WAVE_CHOP_N *2*math.pi + phase*1.7)
8831    end
8832    
8833    -- ⚠ CLIPPED TO THE BOARD'S ROWS, which is also how it enters and leaves: the run
8834    -- starts a band below the bottom edge and the drain returns there, so the water
8835    -- washes on and off the playfield without a fade, and no part of this needs alpha.
8836    -- ⚠ Drawn per COLUMN, three stacked rectangles, top-down. layer_rectangle is
8837    -- TOP-LEFT (layer_image is centred), so each band's y IS its top edge.
... [18 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

8848 -- that lost only its deep band would drain into a hard bright line.
8849    function draw_wave_fx()
8850      if not wave_fx then return end
8851      local top, bot   = BOARD_Y, BOARD_Y + BOARD_SIZE*SQUARE
8852      local front, bs  = wave_front_at(wave_fx.t)
8853      local phase      = wave_fx.t*WAVE_PHASE
8854      local segs = { { WAVE_CREST*bs, wave_crest }, { WAVE_MID*bs, wave_mid }, { WAVE_DEEP*bs, wave_deep } }
8855      -- one band per column, each clamped into the playfield; a column whose whole
8856      -- band has left the board contributes nothing
8857      for x = BOARD_X, BOARD_X + BOARD_SIZE*SQUARE - WAVE_STEP, WAVE_STEP do
8858        local cy = wave_crest_y(x, front, phase)
8859        local y  = cy
8860        for _, seg in ipairs(segs) do
8861          local y0 = math.max(y, top)
8862          local y1 = math.min(y + seg[1], bot)
8863          if y1 > y0 then
8864            layer_rectangle(fire_layer, x, y0, WAVE_STEP, y1 - y0, seg[2]())
8865          end
8866          y = y + seg[1]
8867        end
8868      end
8869    end
8870    
8871    -- Stream embers up from every burning tile (VFX; reads the deterministic `fires`
8872    -- map but never grng). `fire_vis` mirrors `fires` but OUTLIVES it by FIRE_FADE, so
8873    -- a tile that stops burning keeps shedding a dimming base core after its rising
8874    -- tongues (fed only while burning) have run out.
8875    FIRE_FADE   = 0.5        -- seconds a spent tile's base core keeps dimming out
8876    fire_vis    = {}         -- cell_key -> { fade }
8877    fire_emit_t = 0

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: no errors

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

WAVEFX peak=19 (board top=7) row0_cy=22 up=0.450
  t=0.10 front= 164.2 band=1.00 ripples= 7 deepest= 80.5 below crest | rects/frame=1200
  t=0.30 front=  45.7 band=1.00 ripples=12 deepest=197.1 below crest | rects/frame=1800
  t=0.45 front=  19.0 band=1.00 ripples=12 deepest=197.1 below crest | rects/frame=1800
  t=0.96 front=  79.0 band=0.70 ripples=11 deepest=162.8 below crest | rects/frame=1680
  t=1.36 front= 233.1 band=0.43 ripples= 1 deepest= 11.2 below crest | rects/frame=480

The peak at 19 sits just above the top row's center, leaving it about half submerged as intended. I'm checking the wave arrival delay for row 0—the calculation shows k = 0.9875, which means row 0 pawns still fire even though they're near the peak. The ripples scale proportionally with the run distance.…

removed bytes: 950

-- probes clean --

fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed

Looking at the screenshot, the wave crest renders nicely with its blue band and white top edge, but the ripple lines below are problematic — the black outline shader is making each 1px line appear much thicker with black rims above and below, creating a tangled wire effect instead of looking like water.

The solution is to fill the entire water area from the crest down with solid blue, then add white streaks inside to suggest moving water and foam. Since the outline shader only affects silhouette boundaries (not interior details within a contiguous shape), filling the region will actually eliminate the tangled-wire problem — the interior streaks won't get outlined because they won't have transparent neighbors anymore.

The fill structure layers from top to bottom: white crest, lighter blue mid-section, then darker blue filling the rest of the reach. The ripple lines become light-colored highlights painted on top of the deep blue to read as surface movement. As the water drains and the reach shrinks, the fill recedes back toward the crest, revealing the board again. The tricky part is handling the trailing edge during the drain so it doesn't look like a hard horizontal line cutting across the board.

I'm making the bottom edge of the water wavy too, using the wave surface calculation at a different phase so the receding water has that natural wash-back appearance. During the run-up phase when the water is at full height, it extends all the way to the board bottom. As it drains and reach shrinks, that wavy trailing edge rises, creating the visual effect of water pulling back with a rippled surface.

Now I'm thinking about white streaks and foam — they should appear brightest just under the crest where the break happens, then thin out along the ripple lines. The key is making them broken and discontinuous rather than full-width lines so they read as actual foam instead of just contour marks.

I can use a deterministic noise function based on position and phase to decide where streaks appear, creating patches that shift as the wave animates. Something like checking if a sine function combining the wave frequency, phase, and row index exceeds a threshold — that way the streaks emerge and fade smoothly across the water surface.

For coloring, I'll have the streaks transition from white near the crest down to the mid-tone blue in the deeper areas, either by lerping between the two or simply switching from crest-white for the top few rows to mid-blue below.

On thickness, I'm keeping streaks at 1 pixel, maybe bumping the nearest ones to 2 pixels for emphasis. I'm also reconsidering the ripple growth factor—with a solid filled body, the streaks can be more densely packed and uniform, so I'll reduce the growth rate to 1.10 to let them extend further down the wave rather than spreading outward as much.

Writing the new draw structure... Writing the wave rendering... Finishing the wave rendering logic...

I'm reconsidering the constant naming here—WAVE_DEEP was meant to represent band thickness, but now it's really just an offset for where the ripple streaks begin below the mid band. It makes more sense to define WAVE_HEAD as the combined height of the crest and mid sections, then use WAVE_DEEP to indicate how far down from there the streaks should start.

For the streak function itself, I'm using a sine wave based on the x position and phase to determine which pixels get the ripple effect. The current parameters give about 45% coverage, but I'm thinking 0.3 might work better for a denser streak pattern.

I'm considering adding a second sine component with a different frequency to create more irregular, natural-looking streaks rather than perfectly uniform bands. The performance should be fine — even with the expanded ripple system reaching the full board, I'm still looking at around 1800 rectangles total across all columns, which is manageable.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

8872:  local segs = { { WAVE_CREST*bs, wave_crest }, { WAVE_MID*bs, wave_mid }, { WAVE_DEEP*bs, wave_deep } }
fxsmoke: no errors

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

(Bash completed with no output)

I'm checking why the waveprobe gate isn't triggering when I passed `--waveprobe=1` — it worked before, so…

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s

Initialization complete. Press ESC to exit, F11 for fullscreen.

Headless loop starting...

fxsmoke: driving 1 scenarios

chunk 0: D1, 3 orders, payout every 4.00s, beat 1.00s



fxsmoke: ======== REPORT ========

fxsmoke: 1 ERRORED

  !! wave: main.lua:8822: bad argument #4 to 'format' (number has no integer representation)

fxsmoke: ========================

Shutting down...

I'm catching…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

WAVEFX t=0.15 front= 125.7 cols=120 fillpx= 29012 rects= 850 streak1=37% streak4=42%
WAVEFX t=0.45 front=  19.0 cols=120 fillpx= 54924 rects=1044 streak1=45% streak4=38%
WAVEFX t=0.96 front=  79.0 cols=120 fillpx= 39950 rects= 956 streak1=45% streak4=40%
WAVEFX t=1.31 front= 208.6 cols=120 fillpx=  9404 rects= 557 streak1=36% streak4=44%

The water fills most of the board at its peak—95% coverage—then drains significantly, confirming the animation works as intended. The streaks themselves are fragmented across columns rather than forming continuous lines, which creates that patchy visual effect.…

removed bytes: 1461

-- probes clean --

fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed

I need to tackle two things: first, extend the wave animation to cover the full screen including the UI elements, not just the game board. Second, I should research how pixel art games typically render top-down water in 2D to make the effect more authentic. I'll need to use the web search tools to find some visual references and techniques for this.

For the full-screen wave, I need to adjust the drawing bounds—instead of clipping to the board area, it should span the entire viewport width and height. The tricky part is layering: the wave needs to render above the UI elements but I need to figure out the right layer in the stack to achieve that effect without obscuring the cursor.

On camera attachment: a screen-space effect like this shouldn't be camera-attached, otherwise camera shake could expose the edges. Better to draw it beyond the screen bounds with a margin so it stays seamless regardless of camera movement. For the geometry, the wave should start below the screen and peak somewhere near the top, with the push arrival timing calculated from there.

Now I'm realizing the peak position affects how the stagger plays out across the board rows. If the peak is too high on the screen, all the board rows get passed early in the wave's approach, compressing the stagger effect. I need to recalculate where the peak should actually sit relative to the board's vertical span to maintain good timing across all rows.

Let me verify this works by checking the arrival times for the top and bottom rows — they should still have a reasonable spread. Then I want to research how pixel art games actually handle top-down water effects to make sure I'm on the right visual track.…

[
  {
    "type": "tool_reference",
    "tool_name": "WebSearch"
  },
  {
    "type": "tool_reference",
    "tool_name": "WebFetch"
  }
]

Web search results for query: "pixel art top-down water tutorial technique animate tiles"

Links: [{"title":"Pixel Art Water Tutorials","url":"https://lospec.com/pixel-art-tutorials/tags/water"},{"title":"Pixelblog - 43 - Top Down Tiles Part 2 — SLYNYRD","url":"https://www.slynyrd.com/blog/2023/3/26/pixelblog-43-top-down-tiles-part-2"},{"title":"Use these tricks to make perfect Pixel Art water | Aseprite Tutorial - YouTube","url":"https://www.youtube.com/watch?v=uGCam14StNc"},{"title":"Pixel Art Tutorial - How to Animate Water - YouTube","url":"https://www.youtube.com/watch?v=TEHwG6uttuo"},{"title":"Top-down Water Tiles | OpenGameArt.org","url":"https://opengameart.org/content/top-down-water-tiles"},{"title":"Make Better Pixel Art WATER Doing Just This | Aseprite - YouTube","url":"https://www.youtube.com/watch?v=9zsKAnXHPYI"},{"title":"Pixelblog - 10 - Water in Motion — SLYNYRD","url":"https://www.slynyrd.com/blog/2018/10/12/pixelblog-10-water-in-motion"},{"title":"Animating Water Tiles part 1: Edges – Wolthera.info","url":"https://wolthera.info/2019/06/animating-water-tiles-part-1-edges/"},{"title":"My apologies, they are 16x16 :)","url":"https://itch.io/profile/penusbmic"},{"title":"pixel art tutorial the ultimate character design workflow","url":"https://itch.io/games-like/3809809/pixel-art-tutorial-the-ultimate-character-design-workflow"}]

I found several helpful resources about pixel art water animation techniques for top-down tiles. Here's what the search results show:

## Key Techniques for Animating Top-Down Water Tiles

**Basic Animation Approach:**
You can transition between two frames to create water animation, using either a hard cut back and forth from water A to water B, or adding a frame where the tile layers blend together by reducing opacity of the top water layer to 50%.

**Creating the Water Texture:**
Water is made with wavy interconnected blob shapes formed by single pixel wide lines—start by making one blob then draw branching lines from it that eventually connect and form a network of blobs, breaking up the lines in places to keep a flowing motion through the pattern.

**Frame Timing:**
Frame timing strongly influences the expression—too fast it feels like noise, too slow it becomes choppy, but with just the right speed, only 2 frames can be convincing.

**Undulation Technique:**
One approach involves making water pixels undulate (moving 1 pixel up, left, down, and right in sequence), or contracting and expanding 1/4th of the tile and moving those areas 1/4th over a frame, leading to 4 frames of animation.

**Detail Work:**
Add highlights for sparkle and shadows for depth, making crude drop shadows a couple pixels down from bright lines.

Several video tutorials are also available on YouTube and through platforms like Lospec and itch.io if you'd like visual demonstrations of these techniques.


REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks.

# Pixel Art Water Animation: Technical Rules from SLYNYRD

Based on the article, here are the concrete technical guidelines:

## Wave Motion Fundamentals
The foundation uses "a chain of ovals" to create symmetrical, tileable wave shapes. Circle ovals produce "short deep waves," while "wide ovals for shallow wide waves" work better for broader movements. The author notes that "the shape of your oval chain will change the curvature of the wave."

## Color & Tone Strategy
The waterfall section demonstrates using **3 tonal shifts**: the mouth area is "brighter with lots of reflections," the flow section "bands...darken as they move downward," and the splash completes the sequence. This suggests a minimum of 3 distinct values (highlight, mid, shadow).

## Depth Indicators
For reflective surfaces, depth comes from "slightly shortened" reflections and "highlights in the clouds" that relate to water surface positioning. The sparkly animation uses "simple linear movements" across a 6-frame loop.

## Motion Techniques

- **River flow**: "Simple pulsing lines" indicate directional movement
- **Waterfalls**: Animated "bands" that sag and break apart vertically
- **Reflections**: Wave distortion effects with adjustable width, height, and speed

The author emphasizes iteration: "Make sure you are satisfied with the shape of your wave before animating movement."

# Top-Down Water Tile Rules for Pixel Art

Based on Raymond Schlitter's tutorial, here are the concrete design principles:

**Shape Language:**
The article describes water as "wavy interconnected blob shapes that are formed by single pixel wide lines." The technique involves starting with one blob, then drawing branching lines that eventually connect to form a network of interconnected shapes.

**Tonal Values:**
The guidance recommends using highlights for sparkle effects and shadows for depth, suggesting a minimum of 3 tones (base color, highlights, shadows).

**Highlights & Sparkles:**
"add a few highlights for some sparkle, and shadows for depth." Shadows are positioned a couple pixels below bright lines to create dimensional quality.

**Surface Texture:**
The water pattern relies on breaking up interconnected lines strategically: "break up the lines in places to keep a flowing motion through the pattern."

**Shorelines/Foam:**
The tutorial doesn't explicitly detail shoreline treatment beyond showing layered connections in example scenes.

**Animation Method:**
Create two distinct water texture tiles using the same methodology but different patterns. Transition between frames using either hard cuts or a blended middle frame at 50% opacity. Frame timing is critical—too fast creates visual noise, while too slow appears choppy.

I've been picturing this wrong—top-down pixel water isn't made of parallel horizontal streaks at all. It's actually a network of wavy, interconnected blob shapes formed by single-pixel-wide lines that loop and branch, sometimes breaking apart. The shading is the critical part: you need at least three tones working together, with shadows positioned a couple pixels directly below the bright lines to create that dimensional effect.

The key fix for my procedural approach is adding shadow lines beneath each highlight—that's what transforms a painted stripe into a raised ripple. I also need to break up the streaks into shorter, blob-like segments rather than long arcs, which means increasing the frequency of cuts. This requires expanding my color palette to four tones: a dark shadow layer, the base wave color, a mid-tone highlight, and the bright crest, with each bright line paired with its shadow companion underneath.

For the practical implementation, I'm adding the shadow color, drawing each streak as a highlight with a shadow 1-2 pixels below it, shortening the segments by increasing the patch count, and varying the thickness slightly. Now I need to figure out the layer positioning to ensure this sits above the UI.

I'm inserting a new 'wave' layer into the LAYERS table right before the cursor layer, keeping it outlined so it has a defined edge over the UI elements.

For the geometry, I need to decide whether to attach the wave to the camera. If it's not camera-attached, it stays screen-space while everything else shakes, which could look odd. Attaching it to the camera makes more sense so the water shakes along with the board.

With camera attachment, I'll add a 24px margin on all sides and set the vertical bounds so the wave starts below the screen, peaks near the top (around 12px inset), and drains back down, covering the full screen including the UI.

Now I'm checking the arrival delays with these new dimensions — the wave travels 294 pixels instead of 252, so it'll move faster over the same duration, but the user mentioned the speed feels right at this point.

The bigger shift is that the wave now covers the entire screen including the UI margins (score, hearts, item strip) rather than just the board area, which changes the visual impact significantly. I need to adjust the coordinate calculations — instead of normalizing positions relative to the board's left edge, I should normalize them relative to the screen's left edge at 0.

I'm setting up the implementation with a few new constants for the wave margin and shadow styling, then updating the layer order to place the wave before the cursor, adjusting the surface and streak functions to use screen-relative coordinates, and rewriting the wave drawing function to span the full screen width.…

# Pixel Art Water Tutorials

## Available Tutorials

Lospec lists 12 water-related tutorials:

1. **Water Tutorial Part 1** - Artem Brullov (2018) - "Tips on drawing water"
2. **Fluids / Slime** - Pedro Medeiros (2017) - "Tips on creating liquid animations"
3. **Water Tutorial Part 2** - Artem Brullov (2018) - "Tips on creating an animated waterfall"
4. **Animating Water** - Pedro Medeiros (2016) - "Tips for creating water animations"
5. **Lakes Tutorial** - Luke Sadface (2018) - Walkthrough of creating a lake background
6. **Glasses Tutorial** - Luke Sadface (2017) - Walkthrough of creating a glass of water
7. **How To Pixel Art Tutorials [18] - Water (Simple)** - Dual Core Studio (2017) - "How to create a top-down water tile"
8. **Pixelling Water** - RHL Pixels (2015) - Walkthrough covering water creation
9. **Pixel Art Tutorial - Textures** - Steven Böger (2011) - Texture techniques including water
10. **[Let's Pixel] Water Tiles and Pyxel Edit** - Benjamin Anderson (2015) - Water tileset walkthrough

## Concrete Rules

The page provides **no specific technical rules** about color counts, highlight shapes, dithering usage, or texture methods. Tutorial descriptions are generic; detailed guidance would require accessing individual tutorials.

I've…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (note: the file had been modified on disk since you last read it — the edit applied cleanly, but the file contains other changes not in your context. Read it before edits that depend on surrounding content.)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

8735 --           where it breaks, slowest where it stops, which is the real thing.
8736    --   stall — a beat of hang at the top. Small, but without it the reversal reads
8737    --           as a bounce instead of a turn.
8738    --   down  — drains back, quad_in: the water hangs, then pulls away. Deliberately
8739    --           the longest phase — "slowly comes back down" is the whole request.
8740    -- The band also THINS as it drains (to WAVE_DRAIN). Sliding back at full
8741    -- thickness reads as the same object reversing; thinning reads as water leaving.
8742    -- ⚠ ONLY THE RUN-UP PUSHES. The wash-back is pure decoration — the card is one
8743    -- shove of two squares and it happens as the water comes in.
8744    WAVE_UP     = 0.45
8745    WAVE_STALL  = 0.06
8746    WAVE_DOWN   = 0.90
8747    WAVE_DRAIN  = 0.40    -- band height at the end of the drain, as a fraction
8748    -- ⚠ THE RUN-UP IS CAPPED BY THE BEAT. MARCH_MIN is 0.4s, so late-game beats get
8749    -- short — and the LAST pawn's slide does not start until the crest reaches its
8750    -- row. Uncapped, a top-row pawn would still be sliding when the next march
8751    -- yanked it into a fresh hop. 0.55 leaves room for that slide inside the beat.
8752    -- The drain is not capped: nothing waits on it, so it may wash across the next
8753    -- beat quite happily.
8754    WAVE_BEAT_FRAC = 0.55
8755    -- How far short of the board's top edge the crest tops out. A wave that reaches
8756    -- the far wall exactly has no furthest reach — stopping short is what says it
8757    -- ran out of push. The top row ends up about half submerged rather than covered.
8758    WAVE_PEAK_INSET = 12
8759    WAVE_STEP   = 2       -- px between column samples (~120 columns over 240px)
8760    -- ── THE INNER WATER ─────────────────────────────────────────────────────────
8761    -- ⛔ IT IS A SOLID BODY, not lines over bare board. Two lessons, both learned the
8762    -- hard way on screen:
8763    --   1. Unfilled, the interior read as an EMPTY ribbon sliding up the board. Water
8764    --      that has broken past a point does not vanish, it lies there.
... [10 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

8762 WAVE_STEP   = 2       -- px between column samples (~270 columns across the screen)
8763    -- ── THE INNER WATER ─────────────────────────────────────────────────────────
8764    -- ⛔ IT IS A SOLID BODY, not lines over bare board. Two lessons, both learned the
8765    -- hard way on screen:
8766    --   1. Unfilled, the interior read as an EMPTY ribbon sliding up the board. Water
8767    --      that has broken past a point does not vanish, it lies there.
8768    --   2. Worse, 1px lines on an OUTLINED layer are surrounded by their own black
8769    --      rim — top and bottom — so a 1px blue line arrives as a 3px mostly-black
8770    --      one and the interior read as tangled wire. Filling fixes that for free:
8771    --      inside one contiguous silhouette there are no transparent neighbours, so
8772    --      the streaks get no rim and only the water's outer edge keeps its outline,
8773    --      which is the one place the game's style actually wants it.
8774    -- Legibility of the board underneath is deliberately given up — the whole event
8775    -- is under a second and a half, and you do not read squares through surf.
8776    -- The streaks are BROKEN, not full-width: a continuous line at every depth is a
8777    -- contour map, and it was the second half of why this looked like wire. Each one
8778    -- is gated per column by its own drifting sine, so it appears in patches that
8779    -- slide along the surface, which is what makes the fill look like it is MOVING.
8780    WAVE_RIPPLE_GAP  = 6      -- px from the bright head down to the first streak
8781    WAVE_RIPPLE_GROW = 1.12   -- each gap is this much wider than the last
8782    WAVE_RIPPLE_H    = 1
8783    WAVE_RIPPLE_MAX  = 24     -- iteration backstop; the body's depth ends it first
8784    WAVE_STREAK_N    = 3.5    -- patches across the board width
8785    WAVE_STREAK_CUT  = 0.25   -- higher = shorter, sparser streaks
8786    WAVE_TAIL_I      = 5      -- which detuned curve shapes the water's trailing edge
8787    WAVE_CREST  = 2       -- band thicknesses, top to bottom...
8788    WAVE_MID    = 4
8789    WAVE_DEEP   = 6       -- ...12px total, about a third of a square
8790    -- The surface: a long swell with a short chop summed on top. ⚠ TWO SINES, NOT
8791    -- ONE. A single sine is visibly periodic and reads as a decorative ribbon sliding

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

8862 -- The same curve, detuned for the trailing ripples. `i` is how many rows back it
8863    -- sits: it flattens the amplitude (deep water is calmer than a breaking front)
8864    -- and skews both the phase RATE and its offset, so the lines drift apart instead
8865    -- of travelling as one rigid stack of parallel copies — which is the difference
8866    -- between water and a set of contour lines.
8867    -- Is streak `i` present at this column? Two summed sines again, drifting with the
8868    -- surface — so each streak is a handful of patches that slide along the water
8869    -- rather than a line spanning the whole board. A continuous line at every depth
8870    -- is a contour map, which is exactly what this looked like before.
8871    function wave_streak_on(x, phase, i)
8872      local u = x/gw
8873      return math.sin(u*WAVE_STREAK_N*2*math.pi + phase*1.3 + i*3.1)
8874           + 0.6*math.sin(u*WAVE_STREAK_N*2.7*math.pi + phase*0.8 + i*1.7) > WAVE_STREAK_CUT
8875    end
8876    
8877    function wave_surface_y(x, front, phase, i)
8878      local u = x/gw
8879      local a = 1/(1 + i*0.22)
8880      return front
8881           + WAVE_SWELL_A*a*math.sin(u*WAVE_SWELL_N*2*math.pi + phase*(1 + i*0.11) + i*2.1)
8882           + WAVE_CHOP_A *a*math.sin(u*WAVE_CHOP_N *2*math.pi + phase*1.7 + i*1.3)
8883    end
8884    
8885    -- ⚠ CLIPPED TO THE BOARD'S ROWS, which is also how it enters and leaves: the run
8886    -- starts a band below the bottom edge and the drain returns there, so the water
8887    -- washes on and off the playfield without a fade, and no part of this needs alpha.
8888    -- ⚠ Drawn per COLUMN, three stacked rectangles, top-down. layer_rectangle is
8889    -- TOP-LEFT (layer_image is centred), so each band's y IS its top edge.
8890    -- ⚠ The band SCALES with the drain, and the crest keeps its share of it — a wave
8891    -- that lost only its deep band would drain into a hard bright line.
... [20 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

8903     local cy = wave_crest_y(x, front, phase)
8904        -- ⚠ THE TRAILING EDGE IS A CURVE TOO, not a straight cut. While the wave
8905        -- drains this edge is on screen and a ruler-straight bottom would give the
8906        -- whole illusion away — it gets its own flatter, slower-drifting surface.
8907        local ty = wave_surface_y(x, front + reach, phase, WAVE_TAIL_I)
8908        local y0, y1 = math.max(cy, top), math.min(ty, bot)
8909        if y1 > y0 then
8910          -- the body, one solid column, then the bright head painted back over it
8911          layer_rectangle(fire_layer, x, y0, WAVE_STEP, y1 - y0, wave_deep())
8912          local m0, m1 = math.max(cy + crest_h, top), math.min(cy + crest_h + mid_h, y1)
8913          if m1 > m0 then layer_rectangle(fire_layer, x, m0, WAVE_STEP, m1 - m0, wave_mid()) end
8914          local c1 = math.min(cy + crest_h, y1)
8915          if c1 > y0 then layer_rectangle(fire_layer, x, y0, WAVE_STEP, c1 - y0, wave_crest()) end
8916          -- the streaks: each gap wider than the last, so the surface is busy just
8917          -- under the crest and opens out into calm water behind it. White while
8918          -- they are still foam off the break, dropping to blue once they are just
8919          -- surface texture.
8920          local d, gap = head, WAVE_RIPPLE_GAP
8921          for i = 1, WAVE_RIPPLE_MAX do
8922            d, gap = d + gap, gap*WAVE_RIPPLE_GROW
8923            if cy + d > y1 then break end
8924            if wave_streak_on(x, phase, i) then
8925              local ry = wave_surface_y(x, front, phase, i) + d
8926              local s0, s1 = math.max(ry, top), math.min(ry + WAVE_RIPPLE_H, y1)
8927              if s1 > s0 then
8928                layer_rectangle(fire_layer, x, s0, WAVE_STEP, s1 - s0,
8929                                (i <= 2) and wave_crest() or wave_mid())
8930              end
8931            end
8932          end
... [10 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

1833:  layer_push(cursor_layer, x + 7, y + 9, the_cursor.image_rotation_offset, s, s)
1834:  layer_image(cursor_layer, the_cursor.image, 0, 0)
1835:  layer_pop(cursor_layer)
10800:    layer_circle(cursor_layer, mx, my, 2.5, white())
10802:    layer_circle(cursor_layer, mx, my, 1, black())
=== end of draw ===
10695:function draw()

10778      -- overlay_layer — which the UI toolkit tiers (ui_panel/ui_content/ui_top_*)
10779     -- composite ABOVE. So the game's HUD would both paint over the tool and,
10780     -- worse, keep registering ui_buttons under it (clickable through the panel).
10781     -- Suppressing draw_hud fixes the leak AND the click-through in one move; the
10782     -- ui_buttons reset it normally performs has to happen here instead, and the
10783     -- lab's chooser still draws (fxlab_draw returns everything else itself).
10784     if sound_tuner_active then
10785       ui_buttons = {}
10786       if FXLAB then fxlab_draw() end
10787     elseif not HUD_HIDDEN then
10788       draw_hud()                            -- editor / a hide-UI clip suppresses the whole HUD
10789     end
10790     if ready_gate then draw_ready_gate() end
10791     draw_replay_ghost()
10792     if not replay_mode then
10793       the_cursor:draw()
10794     elseif not RENDER then
10795       -- the replay drives the (full-color) ghost cursor; show the VIEWER's real
10796       -- mouse as a small dot so they can see where they actually are. Suppressed
10797       -- while rendering — there is no viewer, and a stray dot parked wherever the
10798       -- mouse happened to sit would sit in the middle of the trailer.
10799       local mx, my = mouse_position()
10800       layer_circle(cursor_layer, mx, my, 2.5, white())
10801       black.a = 150
10802       layer_circle(cursor_layer, mx, my, 1, black())
10803       black.a = 255
10804     end
10805   
10806     if VIEWER then viewer_draw() end   -- transport + timeline, over the replay
10807     if EDIT and not RENDER then edit_draw() end   -- editor chrome; never captured in export
... [2 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

Created layer: wave (rough)
Created layer: wave_outline (rough)
fxsmoke: no errors

Now I'm verifying the layer's geometry numerically—checking that the columns span the full screen width with proper margins, calculating the peak coverage area, and measuring the streak coverage percentage with the current cut and sample parameters.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

WAVEFX t=0.15 front= 144.4 cols=268 screenfill= 46% rects= 2448 streak1 patches= 7 avglen=22.0px
WAVEFX t=0.45 front=  12.0 cols=268 screenfill= 96% rects= 3140 streak1 patches= 7 avglen=21.7px
WAVEFX t=1.11 front= 144.4 cols=268 screenfill= 46% rects= 2540 streak1 patches= 7 avglen=20.9px

The water animation is filling most of the screen at its peak, reaching about 96% coverage with the crest stopping just short of the top edge. The streak patches are coming out short and scattered—about 7 per line averaging 22 pixels each, which translates to roughly 4.5% of the screen width per patch rather than full-width lines.…

removed bytes: 1726

-- clean --

fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed

Looking at the waterfall animation breakdown, I can see what he's after: continuous wave lines like the original ripple effect, but with each successive line shifting toward white at the top, creating that layered color gradient effect similar to the water bands in the image. So the structure is a gradient fill that transitions from light near the crest to deeper blue below, with continuous ripple lines layered on top that are lighter than their surrounding background, also ramping in color intensity as they descend. The reference image shows this banding effect most clearly at the waterfall's mouth where it's brightest, which maps to our wave's crest at the top of the water body. I'll drop the explicit shadow lines and let the color ramps handle the visual depth instead. The body gradient will run from a lighter tone near the crest down to the deepest shade at the trailing edge, while the continuous lines themselves ramp from near-white at the top through mid-tones to deeper colors, always staying lighter than the surrounding water body.

For implementation, I need a color interpolation helper since the codebase uses manual channel lerping like in the ember code. I'll create a utility that can blend between colors by their RGB channels and produce packed color values.

The key insight is that colors are callable objects that pack their values at draw time, so I can use a module-level scratch color, mutate its fields between calls, and pack it fresh each time a rectangle is drawn. This means I can write a helper function that lerps between two colors by their channels and returns the packed result.

Writing the lerp helper... Writing the ripple loop... Adjusting the color lerps so lines go from wave_crest to wave_deep while the body fills from wave_deep to wave_shade, which keeps good contrast at the bottom while allowing near-white bands at the top as intended. I'll add an easing exponent to concentrate the whitening effect near the crest rather than spreading it evenly across the gradient.

Setting up the constants... Writing the wave drawing function... Writing wave ripple animation... I need to make sure `wave_tone` returns a packed color correctly when called inline, and I should declare `wave_band` as a global function for consistency with the rest of the codebase. I also need to add the `wave_tmp` scratch color near the other color declarations around line 900 rather than leaving it scattered in the code.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

8894 -- centred), so each band's y IS its top edge.
8895    -- ⚠ The bright head SCALES with the drain, and the crest keeps its share — a wave
8896    -- that lost only its deep band would drain into a hard bright line.
8897    function draw_wave_fx()
8898      if not wave_fx then return end
8899      local top, bot   = -WAVE_MARGIN, gh + WAVE_MARGIN
8900      local front, bs  = wave_front_at(wave_fx.t)
8901      local phase      = wave_fx.t*WAVE_PHASE
8902      local crest_h, mid_h = WAVE_CREST*bs, WAVE_MID*bs
8903      local head  = crest_h + mid_h + WAVE_DEEP*bs   -- bright head + the gap before the first streak
8904      -- how far back the water still lies. Scaled by the drain, so the body SHRINKS
8905      -- toward the crest as it empties rather than fading in place.
8906      local reach = (gh + WAVE_MARGIN*2)*bs
8907      for x = -WAVE_MARGIN, gw + WAVE_MARGIN - WAVE_STEP, WAVE_STEP do
8908        local cy = wave_crest_y(x, front, phase)
8909        -- ⚠ THE TRAILING EDGE IS A CURVE TOO, not a straight cut. While the wave
8910        -- drains this edge is on screen and a ruler-straight bottom would give the
8911        -- whole illusion away — it gets its own flatter, slower-drifting surface.
8912        local ty = wave_surface_y(x, front + reach, phase, WAVE_TAIL_I)
8913        local y0, y1 = math.max(cy, top), math.min(ty, bot)
8914        if y1 > y0 then
8915          -- the body, one solid column, then the bright head painted back over it
8916          layer_rectangle(wave_layer, x, y0, WAVE_STEP, y1 - y0, wave_deep())
8917          local m0, m1 = math.max(cy + crest_h, top), math.min(cy + crest_h + mid_h, y1)
8918          if m1 > m0 then layer_rectangle(wave_layer, x, m0, WAVE_STEP, m1 - m0, wave_mid()) end
8919          local c1 = math.min(cy + crest_h, y1)
8920          if c1 > y0 then layer_rectangle(wave_layer, x, y0, WAVE_STEP, c1 - y0, wave_crest()) end
8921          -- ⭐ EACH STREAK IS A PAIR: the trough goes down FIRST and the highlight is
8922          -- painted over its top edge, so the bright line always has its own shadow
8923          -- sitting under it. Drawn the other way round the shadow would cover the
... [20 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

-- clean --
fxsmoke: no errors

I'm verifying the color ramp numerically by checking the tone values at different depths—the lines should transition from white to blue while the fill bands stay darker than their corresponding lines at each level.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

WAVEFX  i  depth    u   line RGB          water RGB
WAVEFX  1   18.0 0.11  (187,224,245)  vs ( 36, 92,162)  line lighter=true
WAVEFX  2   24.7 0.14  (182,219,242)  vs ( 36, 91,160)  line lighter=true
WAVEFX  3   32.2 0.18  (176,215,240)  vs ( 35, 90,159)  line lighter=true
WAVEFX  4   40.7 0.21  (171,210,237)  vs ( 35, 88,157)  line lighter=true
WAVEFX  5   50.1 0.25  (165,205,234)  vs ( 34, 87,155)  line lighter=true
WAVEFX  6   60.7 0.28  (158,199,230)  vs ( 33, 86,153)  line lighter=true
WAVEFX  7   72.5 0.32  (152,193,227)  vs ( 33, 84,151)  line lighter=true
WAVEFX  8   85.8 0.37  (144,187,223)  vs ( 32, 83,149)  line lighter=true
WAVEFX  9  100.7 0.41  (136,180,219)  vs ( 31, 81,146)  line lighter=true
WAVEFX 10  117.3 0.46  (128,173,215)  vs ( 31, 79,144)  line lighter=true
WAVEFX 11  135.9 0.52  (119,165,210)  vs ( 30, 77,141)  line lighter=true
WAVEFX 12  156.8 0.58  (109,157,205)  vs ( 29, 75,138)  line lighter=true
WAVEFX 13  180.2 0.64  ( 98,148,199)  vs ( 28, 73,135)  line lighter=true
WAVEFX 14  206.4 0.71  ( 87,138,193)  vs ( 27, 70,131)  line lighter=true
WAVEFX 15  235.7 0.78  ( 74,127,187)  vs ( 25, 68,127)  line lighter=true
WAVEFX 16  268.5 0.86  ( 61,115,180)  vs ( 24, 65,123)  line lighter=true
WAVEFX 17  305.3 0.95  ( 46,103,172)  vs ( 23, 62,118)  line lighter=true
WAVEFX bands=17  rects/frame=9916 (268 cols)

The color ramps are working as intended—lines transition smoothly from near-white down to mid-blue while water bands shift subtly between darker blues, with every line staying lighter than its surrounding water. The setup uses 17 bands total, but I'm noticing the rect count has jumped significantly to 9916 per frame because the lines are now continuous across every column instead of being sparse.

At 480×270 resolution, that's a lot of draw calls even with batching—268 columns times 37 rects per column adds up quickly over 1.4 seconds. I could reduce the wave step from 2 to 3 or 4 to cut the rect count down to 6600 or 5000, but that trades smoothness for performance; at 4px steps the undulating curve would start looking blocky and the crest would show visible stairstepping. Another angle is merging the deepest water bands since they're nearly identical in color anyway, though that loses some of the gradient detail he wanted.

The simplest fix is capping the ripple lines to around 12 and filling the rest with a single solid band—that brings it down to 7236 rects, still high but more manageable. The real question is whether 10k quads per frame is actually a bottleneck; the GPU can handle 40k vertices trivially, but the Lua-side loop cost of 600k function calls per second might cause a hitch. I should measure the actual frame time rather than guess, though headless profiling is tricky without being able to run the game directly.

Taking the pragmatic approach: I'll increase WAVE_STEP from 2 to 3 pixels, which keeps the curve smooth enough given the amplitude and wavelengths involved, bringing the column count down to 179 and total rects to 6623. The deeper bands do contribute visually despite similar tones, so I need to be careful not to lose too much depth. I'll go with WAVE_STEP = 3 for around 6600 rects and report both the count and the tuning dial to him—if performance stutters, I can dial it up to 4 or 6 to reduce the load. At 3px steps rendered at 3x scale, the wave crest will show 9-pixel-wide staircase steps, which is a reasonable visual tradeoff.

Actually, wait—rather than degrade the visual quality of the crest by increasing the step size, I could instead cap the band ramp in the deep water where it's less noticeable. Once the normalized depth crosses 0.7, I'll stop adding individual bands and fill the rest with a single rect, preserving the detail where it matters most while cutting unnecessary geometry.

Looking at the numbers, that saves only about 20%, and the real bottleneck is the column count driven by the full-screen width and margins. So I'm going to stick with WAVE_STEP = 2 to keep the quality high, accept the ~10k rects, and flag it clearly—if it stutters he'll let me know and I can bump the step then.

The right call here is to keep the approved look intact, report the rect count honestly as a potential risk, and give him the exact dial to adjust if needed. That way I'm not silently degrading something he signed off on, and he has the information to make the call himself.…

removed bytes: 1162

-- clean --

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (note: the file had been modified on disk since you last read it — the edit applied cleanly, but the file contains other changes not in your context. Read it before edits that depend on surrounding content.)

fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed

I need to adjust the wave animation in two ways: increase the spacing between ripple lines by tweaking the gap and growth parameters, and make the wobbling motion more synchronized so the lines follow a predictable offset pattern rather than moving randomly. Looking at the wave surface calculation function, I can see it's using amplitude dampening based on the line index, so I'll need to modify how the phase shifts across different lines to create that coordinated wave effect. Writing the wave function...

The key issue is that multiplying the lag by 1.7 for the chop component would throw them out of sync again, so I need to keep both sine components using the same phase offset to maintain the wave train effect. Writing wave lag code... With a lag of 0.12 rad, each line shifts about 6 pixels, creating a subtle diagonal progression across 17 lines that keeps them visually connected without looking like a smear. I'll expose this as a tunable constant.

For the spacing, I'm increasing the gap between ripple bands from 6 to 9 pixels and keeping the growth factor at 1.12, which gives me depths of 9, 19, 30, and so on — letting me fit more distinct bands within the visible area.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: no errors

I'm checking whether the lines are moving in formation by verifying the spacing between them stays consistent, measuring how much the pattern shifts horizontally from one line to the next, and confirming they don't intersect. The key indicator of synchronized movement is whether the vertical distance between adjacent lines remains stable over time rather than fluctuating erratically.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

WAVEFX bands=15  first gaps: 9.0 10.0 11.2 12.6  rects/frame=8844
WAVEFX t=0.10  worst gap spread=  1.8px  crossings=0
WAVEFX t=0.30  worst gap spread=  1.9px  crossings=0
WAVEFX t=0.60  worst gap spread=  1.8px  crossings=0

The band spacing is much more consistent now — with 15 bands, the initial gaps are wider and more evenly distributed than before. The key improvement is that the worst gap variation across the entire screen and over time is only 1.8-1.9 pixels, meaning adjacent lines maintain a stable separation and move together as a cohesive group rather than drifting independently. There are no overlaps between neighboring lines, which confirms the solution is working properly.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

WAVEFX bands=15  first gaps: 9.0 10.0 11.2 12.6  rects/frame=8844
WAVEFX t=0.10  gap spread now= 1.8px (was 13.4px)  crossings now=0 (was 0)
WAVEFX t=0.30  gap spread now= 1.9px (was 12.3px)  crossings now=0 (was 0)
WAVEFX t=0.60  gap spread now= 1.8px (was 14.2px)  crossings now=0 (was 0)

removed bytes: 2047

-- clean --

fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed

Looking at the screenshot, I can see the wave crest at the top is rendered well with good definition, but the massive blue section below it is the real issue — those horizontal lines are too uniform and evenly spaced, making it look like graph paper or a sonar readout rather than actual water. The wave undulation is flattening out too dramatically as it gets deeper, which breaks the realism.

There's also a genuine rendering bug causing black speckles scattered throughout — these appear where the outline shader is filling in transparent gaps between adjacent column rectangles due to fractional positioning. The gradient that should give the water depth is barely visible, the lines extend uniformly all the way down instead of concentrating detail near the crest, and there are simply too many lines creating a striped effect rather than natural water texture.

The core issues boil down to: the black speckling is a technical bug that needs fixing by either snapping coordinates to integers or moving the wave to a non-outlined layer; the lines need much larger amplitude and shorter wavelengths so they actually undulate visibly; the composition needs to concentrate variation near the surface while keeping the deeper water plain; and the body needs stronger tonal contrast instead of being one flat blue. Looking at how real water actually behaves in top-down views, the surface texture should be concentrated and varied rather than this uniform grid pattern.

For the speckling specifically, I think integer snapping is the right call—it's the correct approach for pixel art anyway and will eliminate the hairline gaps between columns that create the black artifacts. The wave doesn't really need an outline now that it fills the screen, though losing the crest rim is a trade-off. As for making the lines undulate, the current amplitude is way too subtle—only 2 pixels of deviation across 320 pixels is essentially invisible. The deep lines shouldn't flatten out as much as they currently do.

The real issue is that full-width parallel lines read as ruled paper, which contradicts what he's asking for. Instead of choosing between dashes and continuous lines, the solution is to vary the line lengths so they terminate naturally and don't all exist at the same depths—that breaks the ruled-paper monotony while keeping them continuous. The lines need way more amplitude and tighter wavelengths to feel genuinely wavy rather than like straight rulers at this scale. I should also concentrate visual detail by making deeper water plainer and sparser, with lower contrast toward the bottom to reduce the number of elements. Adding vertical variation beyond just horizontal curves would make the water feel more natural and three-dimensional.

Since he's asking for improvement suggestions, I should diagnose the issues and propose solutions rather than jump straight into code. The black speckles are a rendering bug from fractional coordinates that needs fixing regardless, and the amplitude-to-width ratio is the core problem driving everything else.

The uniformity across the whole screen creates a ruled-paper effect when what's needed is detail concentrated near the peaks that fades into plain deep water. The tonal gradient from lighter to darker blue is so subtle it's nearly invisible—either it needs to be much more dramatic or the body should have larger flat areas of distinct color instead of a smooth ramp. There's also a bigger question worth raising: whether top-down water at this scale should even use horizontal lines as the primary visual, since the current approach fills the entire screen and obscures the game for about 1.4 seconds.

Looking at the reference waterfall, the bands are perpendicular to the flow direction, which checks out for our vertical wave motion. But at 480x270 covering the whole screen, we're looking at a massive water expanse—and real games handling that scale use tiled repeating patterns with blob shapes rather than long lines. The strongest fix might be shifting from line-based interior texture to something blob-shaped and wavy instead, though that's different from the dashes he rejected.

The key insight: keep the continuous lines but make them sinuous with high amplitude and multiple frequency components so they weave together. When lines weave strongly and sit close together, they naturally create interconnected lens-shaped areas that read as a blob network—satisfying both his "continuous lines" requirement and the reference's visual style. I need to crank up the amplitude to match the line spacing (around 6-10px) and add a higher-frequency wiggle component so the lines actually weave rather than staying flat and parallel.

For the implementation, I'm thinking of increasing the wave frequency parameter from 5 to around 8-10 to get wavelengths in the 48-60px range, raising the amplitude from 1.5 to 4-5, and reducing the flattening effect. I should also propose fading out the lines with depth so the bottom becomes plain, and I want to clearly flag the speckle bug since that's an objective issue to address.

The black speckles are almost certainly caused by sub-pixel gaps between adjacent column rectangles when their heights are computed from floating-point sine values — the renderer leaves transparent hairline gaps that the outline shader then fills in black. Integer snapping would fix this cleanly.

I'll frame this as a diagnosis with ranked options and a recommendation, asking which direction he prefers before diving into code. The bands are constructed to be vertically contiguous within each column, so gaps aren't coming from there. But if a band's height drops below one pixel due to rounding during rasterization, it could disappear entirely, creating a hole in the water mass — that might be where the black marks are appearing. Maybe the black marks are actually where adjacent columns have slightly different band heights that round to different pixel values, creating a 1px notch at the boundary. Or perhaps the outline shader is picking up the light lines themselves where they sit inside what should be an opaque water mass — which would only happen if there are actually gaps in the band rendering that I'm not accounting for.

Looking at the wave_band logic more carefully: if the height calculation results in something tiny like 0.2px, it might rasterize to zero pixels in some columns due to how the rasterizer handles fractional coordinates, leaving genuine holes. The light lines themselves are 1px tall and should render fine, but the water bands between them are 8px with 9px line spacing — that should work. The real issue might be that the line band itself, being exactly 1px, could round to 0 pixels in certain columns depending on the rasterizer's behavior with fractional coordinates.

The most likely culprit for those black dashes is sub-pixel rounding causing zero-height or misaligned rectangles at fractional offsets, which outline.frag then paints black. The fix is straightforward: snap all y-coordinates to integers so every band lands on exact pixel boundaries. This is standard practice for pixel art with outlined layers and should eliminate the speckling regardless of the exact rasterization mechanism.…

The user is approving the approach and clarifying that the color bands need to shift toward white to match the top edge's color. The line ramp should extend further into the white range, so bands closer to the crest approach that same pale white tone (206,240,255). Looking at the current interpolation from wave crest to wave deep, the first line at u=0.11 is already quite close to white at (187,224,245), but the overall ramp needs to be even whiter to fully match the crest's color. I'm settling on the approach: make the bright end of the line ramp exactly match the crest color, so the topmost band is pure crest white, and the ramp stays lighter overall. I'll combine this with the other planned tweaks—integer snapping, adjusted wavelengths and amplitude, fading lines with depth, and widening the body gradient—so the lines feel more integrated with the wave's structure. Looking at the color values at different depths, the first band is nearly indistinguishable from the crest color, but by the eighth band it's noticeably darker. To keep the bands whiter throughout, I should increase the WAVE_RAMP exponent above 1 so the color transition stays gradual longer, or shift the darker endpoint toward a lighter color like wave_mid instead of wave_deep.

If I use wave_mid as the endpoint with WAVE_RAMP = 1.3, the eighth band becomes much whiter while the deepest lines still read as lighter than the body. But that creates high contrast between the white lines and the darker wave_shade background. Rather than fighting the whiteness by reducing contrast, I'll handle the visual fade through spacing instead—making the gaps between lines wider at depth to naturally reduce their visual prominence.

So the plan is to increase RIPPLE_GROW to space out the deep lines, then let the color ramp do the work. For integer snapping, I need to floor the band boundaries to avoid subpixel rendering, but I have to be careful that adjacent bands still tile seamlessly. Since each band's next boundary becomes the previous band's endpoint, flooring the same value consistently means no gaps appear even if a band collapses to zero height.

For the amplitude and frequency tweaks, I'm bumping up WAVE_CHOP_N and WAVE_CHOP_A to make the waves choppier, while reducing WAVE_FLATTEN to keep the peaks sharper.

But there's a tension: the crest uses the same chop function, so cranking up the amplitude to 4.5 and frequency to 9 will make the crest itself choppier too—and he said the crest shape already looks right. I could parameterize the chop amplitude to scale differently depending on which interior line we're drawing, letting the crest stay gentle while the inner bands get more texture. Adding detail layer... Calculating the rectangle count with 12 bands gives me 7236 total, which is manageable. Now I'm adjusting the body gradient to span from wave_deep to a darker shade, making the color transition more pronounced from the crest down to the depths. I'll darken wave_shade to create a stronger visual separation between the illuminated head and the shadowed body.

For the whiter bands, I'm setting up a line ramp from wave_crest to wave_mid with a WAVE_RAMP exponent of 1.3, which keeps the lighter areas concentrated near the crest. I need to update the comment to reflect that the exponent now works in the opposite direction—higher values push the whitening toward the crest rather than away from it. Let me start writing these changes.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (note: the file had been modified on disk since you last read it — the edit applied cleanly, but the file contains other changes not in your context. Read it before edits that depend on surrounding content.)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

8798 WAVE_RIPPLE_GROW = 1.20
8799    WAVE_RIPPLE_H    = 1
8800    WAVE_RIPPLE_MAX  = 40     -- iteration backstop; the body's depth ends it first
8801    -- ⚠ ABOVE 1, so the bands hold their white LONGER before turning blue — the top
8802    -- of the ramp has to arrive at the same near-white as the crest itself or the
8803    -- lines read as a separate, bluer material laid over the water. Below 1 does the
8804    -- opposite and was why the first line already looked a shade off the break.
8805    WAVE_RAMP        = 1.30
8806    WAVE_TAIL_I      = 5      -- which lagged curve shapes the water's trailing edge
8807    -- ⭐ THE FORMATION. `LAG` is the phase each line trails the one above it by, so it
8808    -- is also how far the pattern slides sideways between them — bigger leans the
8809    -- whole train into a diagonal, smaller stacks them nearly on top of each other.
8810    -- `FLATTEN` is the ONLY per-line detune left: how fast the swell calms with depth.
8811    WAVE_LAG     = 0.15
8812    WAVE_FLATTEN = 0.12
8813    WAVE_CREST  = 2       -- band thicknesses, top to bottom...
8814    WAVE_MID    = 4
8815    WAVE_DEEP   = 6       -- ...12px total, about a third of a square

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: no errors

I'm running through a verification checklist for the wave visualization: checking that the interior line waviness has increased significantly from around 2 pixels to 10+ pixels, confirming the first crest remains unchanged since it has no detail term, verifying the tone bands appear whiter, counting the total bands and their rendering cost, ensuring all coordinates snap to integers, and making sure the larger amplitude doesn't cause any line crossings.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

WAVEFX bands=11 rects=6700 | waviness crest=10.0px line3=17.4px line8=16.2px | min gap=6.1px tight=0
WAVEFX  line  1  u=0.03  line(203,238,254)  water( 37, 95,166)
WAVEFX  line  4  u=0.10  line(193,232,252)  water( 36, 91,160)
WAVEFX  line  8  u=0.35  line(161,210,244)  water( 30, 78,140)
WAVEFX  line 11  u=0.78  line(105,173,231)  water( 21, 55,106)

The waviness improvements are significant—the crest stays clean at 10px while interior lines jumped to 17.4px and 16.2px, fixing that ruler-straight problem. The no-crossings constraint is holding up well too, with a minimum gap of 6.1px and no pairs within 1px, so even with the 5px detail amplitude on larger gaps, the lag keeps everything properly spaced.…

removed bytes: 1694

-- clean --

fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed

The user is saying the wave amplitude got too pronounced with the recent changes—he preferred how it looked before when the lines were nearly straight. I initially thought the straightness was the problem and suggested adding more detail, which he approved, but now with the increased amplitude it's gone too far. I need to dial back the wave detail parameter significantly, probably reverting it to zero or a much smaller value.

Looking at what changed: I increased the flatten parameter from 0.12 to 0.05 to add more amplitude, and added a detail weave term. Since he's saying the amplitude before was fine, I should revert both of those—put flatten back to 0.12 and remove the detail weave entirely. I'll keep the other improvements like the integer snapping fix, the whiter gradient attempt, the band spacing (which he hasn't complained about), and the darker wave shading.

The gradient to white still isn't showing up properly, which is the other issue I need to tackle.

The problem is that most of the visible lines cluster near white—lines 1 through 4 are all essentially the same pale tone (around 203-193 in value), so they're indistinguishable. The darkening only becomes noticeable in the last few lines. The ramp curve is heavily weighted toward the back end, so I'm not getting enough tonal separation across the visible range.

The fix is to use linear interpolation across the line index instead of the depth-based power curve. If I compute the total line count once per frame (since the depth sequence doesn't depend on x-position), I can set each line's intensity as `u = (i-1)/(n-1)`, which guarantees an even step from white to blue across all visible lines. This is cleaner, faster, and actually produces a visible gradient. The issue might be that 1px lines are too thin to show color variation clearly. I could make the line thickness vary too — thicker near the top (2px) and thinner deeper (1px) — which would make the gradient much more visible. So I'll adjust the approach: revert the amplitude back to normal, keep the gradient evenly distributed across line indices, and add thickness ramping to make the whiteness pop near the crest. Let me start by removing the detail parameters and rebuilding from there. For the ramp exponent, I'll set it to 1.0 for pure linear scaling so the gradient stays visible. Line thickness should taper from 2px at the top to 1px deeper down, and I'll apply the same index-based calculation to the body color ramp for consistency.

Now I'm restructuring the wave effect drawing function to build the depth ladder once per frame rather than recalculating it for each column, using the crest height, mid-height, and deep offset to establish the reach, then iterating through ripple gaps to populate the depth array. Finishing the wave rendering loop...…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (note: the file had been modified on disk since you last read it — the edit applied cleanly, but the file contains other changes not in your context. Read it before edits that depend on surrounding content.)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

8905 -- scratch colour across every band of every column is safe — nothing holds a
8906    -- reference to it past the layer_rectangle it was handed to.
8907    function wave_tone(a, b, u)
8908      wave_tmp.r = a.r + (b.r - a.r)*u
8909      wave_tmp.g = a.g + (b.g - a.g)*u
8910      wave_tmp.b = a.b + (b.b - a.b)*u
8911      return wave_tmp()
8912    end
8913    
8914    -- One band of one column, clipped to the water's own top and bottom.
8915    -- ⛔ SNAPPED TO WHOLE PIXELS, and this is a BUG FIX, not tidiness. Every y here
8916    -- comes out of a sine, so bands landed on fractional boundaries; a band that
8917    -- rasterised to nothing — or missed its neighbour by a hair — left a TRANSPARENT
8918    -- pixel inside the water, and on an outlined layer outline.frag paints exactly
8919    -- those black. That was the scatter of little black dashes across the surface.
8920    -- ⚠ Flooring both ends keeps the stack watertight: consecutive bands are handed
8921    -- the same float for one's bottom and the next one's top, so they floor to the
8922    -- same integer and tile exactly. A band too thin to survive the floor collapses
8923    -- to nothing and the next one starts where it would have — no gap either way.
8924    function wave_band(x, a, b, lo, hi, col)
8925      local p0 = math.floor(math.max(a, lo))
8926      local p1 = math.floor(math.min(b, hi))
8927      if p1 > p0 then layer_rectangle(wave_layer, x, p0, WAVE_STEP, p1 - p0, col) end
8928    end
8929    
8930    function wave_surface_y(x, front, phase, i)
8931      local u = x/gw
8932      local a = 1/(1 + i*WAVE_FLATTEN)
8933      local p = phase - i*WAVE_LAG            -- the same water, `i` lags ago
8934      return front
... [16 more lines]

8950   local phase      = wave_fx.t*WAVE_PHASE
8951      local crest_h, mid_h = WAVE_CREST*bs, WAVE_MID*bs
8952      local head  = crest_h + mid_h + WAVE_DEEP*bs   -- bright head + the gap before the first streak
8953      -- how far back the water still lies. Scaled by the drain, so the body SHRINKS
8954      -- toward the crest as it empties rather than fading in place.
8955      local reach = (gh + WAVE_MARGIN*2)*bs
8956      for x = -WAVE_MARGIN, gw + WAVE_MARGIN - WAVE_STEP, WAVE_STEP do
8957        local cy = wave_crest_y(x, front, phase)
8958        -- ⚠ THE TRAILING EDGE IS A CURVE TOO, not a straight cut. While the wave
8959        -- drains this edge is on screen and a ruler-straight bottom would give the
8960        -- whole illusion away — it gets its own flatter, slower-drifting surface.
8961        local ty = wave_surface_y(x, front + reach, phase, WAVE_TAIL_I)
8962        local y0, y1 = math.max(cy, top), math.min(ty, bot)
8963        if y1 > y0 then
8964          -- the bright head: the break itself, then its first shelf
8965          wave_band(x, cy, cy + crest_h, y0, y1, wave_crest())
8966          wave_band(x, cy + crest_h, cy + crest_h + mid_h, y0, y1, wave_mid())
8967          -- ⭐ THE RAMP. Walking down the body, each step lays the WATER between the
8968          -- last line and this one, then the LINE itself over its top edge. Both
8969          -- tones come off `u` — how far back this band sits — so the whole stack
8970          -- steps away from white together and the water between two lines is always
8971          -- darker than the line above it. Continuous, never dashed: the eye needs
8972          -- length to follow the undulation, and that undulation is the movement.
8973          local prev   = cy + crest_h + mid_h
8974          local d, gap = head, WAVE_RIPPLE_GAP
8975          for i = 1, WAVE_RIPPLE_MAX do
8976            d, gap = d + gap, gap*WAVE_RIPPLE_GROW
8977            local ry = wave_surface_y(x, front, phase, i) + d
8978            if ry >= y1 then break end
8979            local u = math.min(1, d/reach)^WAVE_RAMP
... [10 more lines]

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

-- clean --
fxsmoke: no errors

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

WAVEFX bands=11 waviness crest=10.0 line4=6.5 line11=4.3
WAVEFX line  1 u=0.00 h=2.0 line(206,240,255) water( 38, 96,168)
WAVEFX line  2 u=0.10 h=1.9 line(193,231,252) water( 36, 91,160)
WAVEFX line  3 u=0.20 h=1.8 line(180,223,249) water( 34, 86,152)
WAVEFX line  4 u=0.30 h=1.7 line(167,214,246) water( 31, 80,144)
WAVEFX line  5 u=0.40 h=1.6 line(154,206,243) water( 29, 75,136)
WAVEFX line  6 u=0.50 h=1.5 line(141,197,240) water( 27, 70,128)
WAVEFX line  7 u=0.60 h=1.4 line(128,188,236) water( 25, 65,120)
WAVEFX line  8 u=0.70 h=1.3 line(115,180,233) water( 23, 60,112)
WAVEFX line  9 u=0.80 h=1.2 line(102,171,230) water( 20, 54,104)
WAVEFX line 10 u=0.90 h=1.1 line( 89,163,227) water( 18, 49, 96)
WAVEFX line 11 u=1.00 h=1.0 line( 76,154,224) water( 16, 44, 88)

The gradient is now evenly distributed across the crest, stepping consistently from the white peak down through progressively darker blues, with the water layer below also ramping smoothly and the line thickness tapering from thick to thin.…

removed bytes: 1272

-- clean --

fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed

Looking at the reference images the user provided, I can see they're showing top-down views of water with distinct visual patterns. The first image is a large, detailed ocean scene featuring soft, irregular patches of light and dark blue that form organic lens and diamond shapes, connected by thin white lines that trace the ripple crests like a network of curves. These white lines mark the boundaries between wave facets, and there are small white sparkles scattered throughout, creating that characteristic glinting effect you see on water surfaces.

The remaining images show different interpretations of the same concept: one has clear noise-driven contour bands with multiple tones of blue and teal forming irregular blobs, another is more Stardew-like with sparse lighter dashes and foam at the shore, one is a more illustrative ocean with white foam curves, and the last is a pond with caustic-like white flecks and a depth gradient. The key insight the user is highlighting is that the water isn't just horizontal stripes — it's a 2D noise field creating irregular organic blobs and networks that vary across both axes. My current approach only varies the pattern vertically per column, which is why it reads as stripes rather than having that rich 2D structure these references show.

The user is asking if I can generate 2D noise patterns like this, and they're suggesting a shader approach. A fragment shader is actually the ideal solution here — I can write a shader that generates value noise and contours it per pixel, which is exactly what these water patterns are doing. The engine already supports shaders with a working pipeline, so creating a water.frag file to handle this is entirely feasible. I could also try CPU-side approaches like drawing small rectangles sampling a 2D noise function, but that would be computationally expensive at the resolution we're working with. A pre-baked noise texture is another option worth considering.

For the shader itself, I'd generate value noise at multiple octaves, animate it by scrolling the noise domain over time with different speeds per octave, then quantize the result into discrete color bands to get that pixel-art look matching the reference image. The bands would map to the wave palette from white crests down through the darker tones.

To detect edges where the quantized bands change, I'd draw white lines along those boundaries—that creates the sinuous network pattern. The shader would also mask the effect to only render where water actually exists (between the crest and tail), and brighten the area near the break to preserve that ramp-to-white effect.

For the masking itself, I could draw the water mass as a solid color into the wave layer using the current approach (one rectangle per column), then have the shader test the alpha channel to know where it's inside the water.

But a cleaner approach: instead of relying on the drawn color as a mask, I'll pass the wave's parameters directly to the shader as uniforms—the front position, phase, band scale, and amplitudes. Then the shader can compute the crest and tail curves itself for each x position, eliminating the need for a CPU-side mask entirely.

This simplifies the draw call dramatically: instead of rendering 6700 individual rectangles, I just draw one fullscreen quad into the wave layer and let the shader handle all the computation—crest position, depth calculation, noise, banding, and edge effects. The `draw_wave_fx` function becomes a single fullscreen rectangle followed by applying the water shader with the necessary uniforms.

I need to check how `layer_apply_shader` actually works in this engine though—whether shader operations run immediately or only during the layer's render pass.

But stepping…

assets/draw_shader.frag
assets/grayscale.frag
assets/outline.frag
assets/outline_only.frag
assets/recolor.frag
assets/shadow.frag
./assets/draw_shader.frag
./assets/grayscale.frag
./assets/outline.frag
./assets/outline_only.frag
./assets/recolor.frag
./assets/shadow.frag
=== shader api in game ===
emoji/effect.lua:389:    shader_set_vec4_immediate(effect_draw_shader, 'u_palette[' .. (i - 1) .. ']',
emoji/effect.lua:413:  layer_shader_set_int(layer, effect_draw_shader, uni .. 'kind', kind)
emoji/effect.lua:416:  layer_shader_set_float(layer, effect_draw_shader, uni .. 'size',         v('size') or 10)
emoji/effect.lua:417:  layer_shader_set_float(layer, effect_draw_shader, uni .. 'size_var',     v('size_var') or 0)
emoji/effect.lua:418:  layer_shader_set_float(layer, effect_draw_shader, uni .. 'pitch',        v('pitch') or 22)
emoji/effect.lua:419:  layer_shader_set_float(layer, effect_draw_shader, uni .. 'rotation',     v('rotation') or 0)
emoji/effect.lua:420:  layer_shader_set_float(layer, effect_draw_shader, uni .. 'rotation_var', v('rotation_var') or 0)
emoji/effect.lua:421:  layer_shader_set_float(layer, effect_draw_shader, uni .. 'jitter',       v('jitter') or 0)
emoji/effect.lua:422:  layer_shader_set_float(layer, effect_draw_shader, uni .. 'outline',      v('outline') or 0)
emoji/effect.lua:423:  layer_shader_set_float(layer, effect_draw_shader, uni .. 'shade',        v('shade') or -0.12)
emoji/effect.lua:424:  layer_shader_set_int  (layer, effect_draw_shader, uni .. 'color_mode',
emoji/effect.lua:426:  layer_shader_set_int  (layer, effect_draw_shader, uni .. 'color',   resolve_color(v('color') or 'white'))
emoji/effect.lua:427:  layer_shader_set_int  (layer, effect_draw_shader, uni .. 'color_b', resolve_color(v('color_b') or 'fg'))
emoji/effect.lua:430:  layer_shader_set_int  (layer, effect_draw_shader, uni .. 'driver',
emoji/effect.lua:432:  layer_shader_set_float(layer, effect_draw_shader, uni .. 'driver_scale', v('driver_scale') or 0.3)
emoji/effect.lua:433:  layer_shader_set_float(layer, effect_draw_shader, uni .. 'driver_speed', v('driver_speed') or 1)
emoji/effect.lua:438:    layer_shader_set_texture(layer, effect_draw_shader, uni .. 'tex', icon.handle, unit)
... [3 more lines]

I'm examining the shader system in `emoji/effect.lua` and the fragment shader it uses, which already has a procedural pattern generation setup with parameters for pattern type and dithering. This looks like I could extend the existing pattern system rather than building from scratch.…

// =============================================================================
// ricochet-template — unified draw shader (single fragment shader for the
// whole project, installed via set_draw_shader as the engine's default).
//
// THREE-AXIS MODEL
//   Every fragment is processed as:
//
//       f   = pattern(world_pos, time, scale, param)   // [0, 1]
//       f   = dither(f, pixel_pos)                     // {0, 1/n, …, 1}
//       rgb = color(base_rgb, f, palette[color_a], palette[color_b])
//
//   Pattern owns spatial structure AND animation. Color is a pure recipe
//   that picks/mixes palette tokens by f. Dither inserts the pixel-art
//   stipple between them. The three are independent — any combination is
//   valid. See effect.lua for the registered names per axis.
//
// VARYING INPUTS (from engine vertex shader; do not rename)
//   vPos       World-space fragment position. For camera-attached layers
//              this is camera-transformed world space.
//   vUV        0..1 UV inside the draw's quad (or sprite UV for sprites).
//   vColor     Per-vertex RGBA color (the `color` arg passed to layer_*).
//   vType      Shape dispatch: 0=rect, 1=circle, 2=sprite, 3=line/capsule,
//              4=triangle, 5=polygon, 6=rounded rect.
//   vShape0..4 Per-shape parameter bundle.
//   vAddColor  Per-vertex additive RGB offset (engine 'flash' channel).
//
// UNIFORMS YOU SET FROM LUA (via effect.lua's effect_set)
//   u_pattern_kind   int   1=organic 2=solid 3=plasma 4=waves 5=marble
//                          6=sine_grid 7=wood 8=truchet 9=contours
//                          10=linear_gradient 11=radial_gradient (LOCAL)
... [40 more lines]

The project already has a unified draw shader with a three-axis model combining patterns, dithering, and color—including organic, plasma, marble, and contour patterns that match the references. There's a critical memory note warning that branch-only shader uniforms can be stripped or silently fail to render, suggesting the need to bake data into atlases or per-vertex data instead.…

// PATTERNS — produce a scalar field f ∈ [0, 1] at the fragment's world_pos.
// New patterns: add a function here, add a branch in pattern_field().
// =============================================================================

// Balatro's 3-point smooth pseudo-noise. Three sample points drift over time
// via independent sin/cos sources; their lengths/components are summed and
// normalized to roughly [0, 1]. Anchored to world coordinates, so on
// camera-attached layers the pattern stays stable as the camera moves.
float pattern_organic(vec2 world_pos, float scale, float t) {
    vec2 uv = world_pos * scale;
    vec2 p1 = uv + 50.0 * vec2(sin(-t / 143.634), cos(-t / 99.4324));
    vec2 p2 = uv + 50.0 * vec2(cos(t / 53.1532),  cos(t / 61.4532));
    vec2 p3 = uv + 50.0 * vec2(sin(-t / 87.53218), sin(-t / 49.0));
    return (1.0 + (
        cos(length(p1) / 19.483) +
        sin(length(p2) / 33.155) * cos(p2.y / 15.73) +
        cos(length(p3) / 27.193) * sin(p3.x / 21.92)
    )) / 2.0;
}

// ---- smooth single-octave value noise (shared by several patterns) ----
float value_hash(vec2 p) {
    return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453);
}
float value_noise(vec2 p) {
    vec2 i = floor(p);
    vec2 f = fract(p);
    float a = value_hash(i);
    float b = value_hash(i + vec2(1.0, 0.0));
    float c = value_hash(i + vec2(0.0, 1.0));
... [66 more lines]

float pattern_contours(vec2 wp, float scale, float t, float param) {
    vec2 p = wp * scale * 0.02 + vec2(t * 0.02, 0.0);
    float n = value_noise(p);
    float k = 3.0 + param * 9.0;
    return abs(2.0 * fract(n * k) - 1.0);
}

// ---- LOCAL patterns (rect-relative, NOT world-anchored) ----
// Every pattern above samples world_pos, so it's global: anchored to world
// coordinates, camera-stable, and independent of which rect is drawn over it.
// These two instead sample the draw's own 0..1 UV, so the field is locked to
// the rectangle's box — it moves and scales WITH the rect. `quad_px` is the
// quad's pixel size, used to aspect-correct (UV is normalized per-axis and so
// otherwise loses the rect's true proportions). Neither animates; the "how
// fast the gradient goes" / steepness knob is the universal CONTRAST modifier
// (applied for free in effect_field) — contrast 1 = gentle even ramp,
// contrast > 1 = a sharp narrow transition with flat A/B plateaus.

// linear_gradient — A→B ramp across the rect. param = ANGLE (0..1 → 0..2π),
=== effect_set / scoping API ===
end

--[[
  effect_set(layer, spec)
  Write the effect uniforms for `layer`'s subsequent draws. spec is a sparse
  table — any omitted field uses the documented default (see top of file).

  Always writes u_time so animated patterns advance frame-to-frame.

  Performance: enqueues ~14 uniform writes per call (plus the ramp token list
... [51 more lines]

So the `effect_set` function is scoped per-layer and per-draw-order, meaning I can set uniforms for the wave layer without affecting other layers. Since the wave has its own dedicated layer, I can apply the pattern directly there with no risk of interference. This is a clean architectural fit.

Now I'm checking whether the ubershader…

main.lua:155:-- Dev-only for now: GAME_HOSTED/VERIFY/harnesses stay endless, every hook
main.lua:507:if not GAME_HOSTED then                  -- the tuner cluster is dev-only: a visitor
main.lua:525:if not GAME_HOSTED then bind('mark', 'mouse:2') end
main.lua:527:if not GAME_HOSTED then
main.lua:549:if not GAME_HOSTED then bind('debug_grant', 'key:g') end   -- dev: grant next item (item-feel testing)
main.lua:550:if not GAME_HOSTED then bind('toggle_session', 'key:f8') end   -- dev: session-run shell <-> endless
main.lua:551:if not GAME_HOSTED then                                    -- dev: F7 effect lab (fx_lab.lua)
main.lua:566:if not GAME_HOSTED then bind('debug_heal',  'key:j') end   -- dev: fire Meat's heal effect on demand
main.lua:567:if not GAME_HOSTED then bind('cycle_lang',  'key:l') end   -- dev: cycle card language (en/pt/ja/ru)
main.lua:1151:-- GAME_HOSTED = running embedded in the site (game_host.lua injects it):
main.lua:1153:if not GAME_HOSTED then
main.lua:1378:    if chunk_plan and #chunk_plan > 0 and not GAME_HOSTED and not replay_mode then
=== palette tokens ===
53:-- palette_token_names ORDER == the shader's u_palette[] index order. The
59:palette_token_names = {
85:for i, n in ipairs(palette_token_names) do

emoji/effect.lua:26:    effect_setup(opts)                       install draw shader, cache its
emoji/effect.lua:39:                                             and effect_setup)
emoji/effect.lua:353:  effect_setup(opts)
emoji/effect.lua:365:function effect_setup(opts)
emoji/effect.lua:377:  Called automatically by effect_setup() AND by palette_init() — but the
emoji/effect.lua:381:  No-op if effect_setup hasn't run yet (shader not loaded) or palette_init
emoji/effect.lua:453:  -- No-op when the ubershader isn't installed (GAME_HOSTED gates effect_setup;
emoji/init.lua:108:-- HOSTED: effect_setup swaps the ENGINE-GLOBAL draw shader; embedded in the
emoji/init.lua:112:-- game may call effect_setup (the Anchor3 engine compiles it async on web
emoji/init.lua:116:-- HEADLESS: same skip, different reason. effect_setup -> effect_write_palette ->
=== is it called anywhere in KVP? ===

font_register('big',  'assets/FatPixelFont.ttf', 8)   -- chunky display headers
font_register('mid',  'assets/Awesome 9.ttf',   16)   -- mid-size headers / score

-- ── effect system boot ────────────────────────────────────────────────────
-- Installs the four-axis draw shader (replaces the engine default) and
-- pushes the 22-token palette to u_palette[]. Shader default state is
-- passthrough, so everything renders identically until a spec is set.
--
-- HOSTED: effect_setup swaps the ENGINE-GLOBAL draw shader; embedded in the
-- site that slot belongs to the site (which runs the engine default shader
-- since the 2026-07-18 boot-freeze fix), and this game drives zero effect
-- axes — so skip the ubershader compile entirely. An effect-USING hosted
-- game may call effect_setup (the Anchor3 engine compiles it async on web
-- now), but must first port the lazy get_draw_shader resolve from the
-- site's ricochet/effect.lua — this emoji copy still snapshots it
-- synchronously right after set_draw_shader.
-- HEADLESS: same skip, different reason. effect_setup -> effect_write_palette ->
-- shader_set_vec4_immediate, and the three *_immediate bindings are the only
-- shader bindings in the engine WITHOUT a headless guard (anchor.c ~7530-7570) —
-- they call glUseProgram with no GL context, which segfaults on boot. effect_set /
-- effect_clear both nil-guard on effect_draw_shader, so skipping setup leaves the
-- effect layer inert exactly as the hosted path does.
palette_init()
if not GAME_HOSTED and not engine_get_headless() then
  effect_setup()
end

I'm realizing that `effect_setup()` only executes in non-hosted, non-headless environments, but KVP is deployed as a hosted game on a site, so it skips the ubershader compilation entirely. The note clarifies that while effect-using hosted games can call `effect_setup()` with async compilation, they'd need to port the lazy shader resolution from the site's existing effect system first, which this implementation currently handles synchronously right after setting the draw shader.

Since KVP is live on a327ex.com and headless mode also skips `effect_setup()`, making the wave depend on the ubershader would break it on the live site (rendering as flat color) unless I port that lazy resolution, and I can't verify the shader headlessly anyway since draw doesn't run in that mode. So the constraint is real and needs to go in the brief.

Option 2 — a dedicated `water.frag` applied via `layer_apply_shader` — sidesteps all of this: it's a self-contained post-process like outline.frag, no engine-global swap, no palette restriction, and the same shader loading path that already works hosted, though I'd need to write the noise and contour code myself.

The tricky part is that the post-process shader needs the water mask on the layer, then replaces the interior with the pattern — I can encode depth information in the base color or derive it from screen-space noise plus the alpha mask, and the shader reads that to compute the banded color output.

Option 3 would be pre-generating a tiling noise texture as an asset and sampling it, but that adds complexity without clear benefits over option 2. Given everything, the dedicated water.frag post-process on the wave layer seems like the cleanest approach — it's self-contained, doesn't risk the live site, and has no palette restrictions. Now I need to verify the apply_shader pipeline actually works and can coexist with the existing outline effect.…

  eng.set_blend_mode(lyr_handle(lyr), mode)
end

--- Queue this layer for compositing to the screen (after layer_render).
function layer_draw(lyr, x, y)
  eng.draw(lyr_handle(lyr), x or 0, y or 0)
end

function layer_apply_shader(lyr, shader)
  eng.apply_shader(lyr_handle(lyr), shader)
end

function layer_shader_set_float(lyr, shader, name, value)
  eng.shader_set_float(lyr_handle(lyr), shader, name, value)
end

function layer_shader_set_vec2(lyr, shader, name, x, y)
  eng.shader_set_vec2(lyr_handle(lyr), shader, name, x, y)
end

function layer_shader_set_vec4(lyr, shader, name, x, y, z, w)
  eng.shader_set_vec4(lyr_handle(lyr), shader, name, x, y, z, w)
end

function layer_shader_set_int(lyr, shader, name, value)
  eng.shader_set_int(lyr_handle(lyr), shader, name, value)
=== how outline is applied per layer ===
31:    1. layer_render every content layer (flush queued commands to FBOs)
52:outline_shader      = shader_load_file('assets/outline.frag')
56:shader_set_vec2_immediate(outline_shader,      'u_pixel_size', 1/width, 1/height)
... [5 more lines]

I'm seeing how the outline mechanism works as a separate rendering pass—the content layer gets drawn and rendered with any shaders applied, then the outline layer draws from the content through the outline shader. This means I can freely apply shaders like the water effect directly to the content layer without interfering with the outline process.

Now I'm ready to write up a design brief that covers the core issue: why the current 1D approach can't be fixed through tuning alone, what the engine already provides, and my recommendation for a dedicated water shader as a layer post-process. I'll lay out the concrete shader design—how it reads the depth ramp from the CPU draw, applies 2D noise and edge detection to create the water effect, and why this approach works within the live-site constraints. The middle ground is to have the CPU draw each column as a vertical gradient that encodes depth via luminance, then the shader reads that depth value and uses it alongside 2D noise to quantize the water into bands, picking colors from a palette and brightening the edges where bands meet to create the crest lines — this avoids duplicating the curve math. An even simpler approach might be to encode depth in the alpha channel instead. Shader computes depth from the y-position relative to the water front, applies Perlin noise for banding, and colors each pixel based on depth and noise band with edge detection to brighten band boundaries. I can verify the shader compiles and the noise math works offline by implementing it in Python, but the visual result is ultimately his to judge since I can't see the rendered output.

Actually, prototyping the pattern in Python and generating a PNG would let both of us see and iterate on the math before porting it to GLSL — that's a much stronger workflow than blind-tuning in the game. I should propose that approach and ask before implementing.…

I'll prototype this offline in Python by implementing a value noise function that matches the GLSL version exactly, then layer it with FBM across a few octaves, quantize the result into discrete bands, and map those bands to the four wave tones based on depth. I'll also add edge detection to find where the quantized values change between neighboring pixels, then render it all out to a 480x270 PNG to see how it looks.

Writing the noise and FBM implementation... Building the color palette and blending logic...…

File created successfully at: C:\Users\adn\AppData\Local\Temp\claude\E--a327ex\001401a9-94a8-4f9e-b94e-e9334af59fca\scratchpad\water.py (file state is current in your context — no need to Read it back)

wrote sheet1.png
Shell cwd was reset to E:\a327ex

[
  {
    "type": "image",
    "note": "[image stored privately: vault/media/horse-game-16/004.png]"
  }
]

The 2D organic blobs are taking shape and matching the references much better now, with proper quantized flat bands and a darkening depth ramp. The core issue is that the edge definition isn't reading clearly — the references have a distinct thin white outline tracing the blob boundaries, but mine just blends into the next tone without enough contrast. I need to make that edge line much more pronounced.

Beyond the edges, the overall tonal range feels too chunky and contrasty compared to the references, which use subtler intermediate tones with the white lines doing the heavy lifting for structure. The blob shapes themselves are also off — they should be more elongated and directional like ocean swell viewed from above, but my aspect ratio is inverted. To get wide, flat horizontal blobs, I need the noise to vary slowly across the x-axis and quickly across the y-axis, which means adjusting how the scale and aspect parameters control the frequency in each direction.

The depth weighting is also too aggressive at the default, crushing the bottom into near-uniform darkness, whereas the references maintain visible structure throughout. I'm going to try a second pass with wider blobs (aspect 2.5–3), thinner bright edge lines in near-white, lower depth weighting, more subtle tonal bands that sit closer in value, and a lighter overall palette. I'll also separate the edge as its own bright color rather than just stepping up one tone.

Looking at the references more carefully, those white lines appear mostly at the crests—the peaks of the ripples—rather than outlining every blob. So I should add an edge threshold parameter that only draws the outline where the value exceeds a certain level, creating that sparse branching network effect instead of a dense outline.

Modifying the script now with aspect semantics fixed, edge color set to near-white at 1px, an edge threshold parameter, and a lighter palette weighted toward mid-blue. I'll also render at the reference resolution.

Since the game displays at 3x scale, features that look modest here will appear chunky on screen. The reference images suggest roughly 8-10 blobs across at 1024px, so around 100px each. At 480px width that scales to about 48px per blob, meaning I want features in the 40-60px range. With value noise at scale 0.030, each noise cell is roughly…

The file C:\Users\adn\AppData\Local\Temp\claude\E--a327ex\001401a9-94a8-4f9e-b94e-e9334af59fca\scratchpad\water.py has been updated successfully. (file state is current in your context — no need to Read it back)

The file C:\Users\adn\AppData\Local\Temp\claude\E--a327ex\001401a9-94a8-4f9e-b94e-e9334af59fca\scratchpad\water.py has been updated successfully. (file state is current in your context — no need to Read it back)

The file C:\Users\adn\AppData\Local\Temp\claude\E--a327ex\001401a9-94a8-4f9e-b94e-e9334af59fca\scratchpad\water.py has been updated successfully. (file state is current in your context — no need to Read it back)

wrote sheet2.png
Shell cwd was reset to E:\a327ex

[
  {
    "type": "image",
    "note": "[image stored privately: vault/media/horse-game-16/005.png]"
  }
]

The white network is becoming more visible now, and the blobs have that elongated, wave-like quality I'm going for. Comparing against the top-down ocean reference, I'm getting closer—the white lines are there and the blob shapes are working, though I need them to be more sinuous and continuous like the reference's soft, flowing crests. The scale at .015 looks promising as a starting point.

Looking at the remaining gaps: the white lines need to be crisper and slightly more prominent, the depth gradient toward white at the top needs to be much more visible (currently it's too subtle), and the overall value range is too narrow—everything's sitting in mid-blue when the reference has more contrast between darker and lighter areas.

For the next iteration, I'm focusing on scale 0.015–0.020, bands 4–6, and most importantly bringing back a strong depth ramp that whitens toward the crest. The owner specifically asked for that gradient to white at the top, so I need to make depth drive the palette toward the brightest tones near the surface. Instead of just modulating the level value, I'll shift the color lookup table itself based on depth—near the crest use brighter stops, deeper down use darker ones. The simplest approach is to compute the base color from the band structure, then blend it toward white using a depth-weighted factor, something like `(1 - depth)^2 * strength`, so the top of the water gets that bright, crisp appearance he's looking for.

I should also test a couple of scale variations and add a subtle sparkle layer, then put together a third comparison sheet. One thing to keep in mind when showing him the results: these are rendered at 480×270 but the game displays them at 3× scale, so the features will look three times chunkier in actual gameplay than they do in the contact sheet.…

The file C:\Users\adn\AppData\Local\Temp\claude\E--a327ex\001401a9-94a8-4f9e-b94e-e9334af59fca\scratchpad\water.py has been updated successfully. (file state is current in your context — no need to Read it back)

The file C:\Users\adn\AppData\Local\Temp\claude\E--a327ex\001401a9-94a8-4f9e-b94e-e9334af59fca\scratchpad\water.py has been updated successfully. (file state is current in your context — no need to Read it back)

The file C:\Users\adn\AppData\Local\Temp\claude\E--a327ex\001401a9-94a8-4f9e-b94e-e9334af59fca\scratchpad\water.py has been updated successfully. (file state is current in your context — no need to Read it back)

The file C:\Users\adn\AppData\Local\Temp\claude\E--a327ex\001401a9-94a8-4f9e-b94e-e9334af59fca\scratchpad\water.py has been updated successfully. (file state is current in your context — no need to Read it back)

wrote sheet3.png
Shell cwd was reset to E:\a327ex

[
  {
    "type": "image",
    "note": "[image stored privately: vault/media/horse-game-16/006.png]"
  }
]

The "bright .45 dark .35" settings are working best—they create that clear white network with wide swell blobs that brighten toward the crest and darken at the back, matching the reference well. The higher brightness and darkness values wash things out too much, and the sparkle effect is way too intense, looking more like static than anything useful.

I'm going with `scale 0.016, aspect 2.5, bands 5, edge_min 0.45, bright 0.45, dark 0.35` without sparkle. Now I'll render this at 3x scale (1440x810) to match how it'll actually appear in the game, and generate a few animation frames to verify the water drift reads correctly—checking t=0, 0.15, and 0.3 to see the motion direction and speed. Once I confirm the preview looks right, I'll port this to GLSL.…

ok
Shell cwd was reset to E:\a327ex

[
  {
    "type": "image",
    "note": "[image stored privately: vault/media/horse-game-16/007.png]"
  }
]

The water effect looks right compared to the reference, so I should show the user both images and clarify what I'd lock in before moving to GLSL, since that's a substantial port and the whole point was to iterate with them.…

2 files delivered to user.

He's asking to test the middle and bottom tiles from the contact sheet in motion—specifically the ones without the white dividing lines. I'm mentally mapping out which variations he means from the grid of options.

Looking at the tiles, I think he wants the white edge lines confined to just the crest area where the water breaks, not running through the entire body of the water. That aligns with the earlier direction about concentrating structure near the top. So I'd need to gate the edge line rendering by depth—only draw them in the shallow regions near the surface.

He's asking to test this in the actual game, so my next steps are to do a quick render to verify the depth-gated edge effect looks right, then port the shader to GLSL and integrate it into the water system.…

ok
Shell cwd was reset to E:\a327ex

[
  {
    "type": "image",
    "note": "[image stored privately: vault/media/horse-game-16/008.png]"
  }
]

/e/a327ex/Anchor3/docs/ENGINE_API_QUICK.md:158:layer_apply_shader(layer, shader)
/e/a327ex/Anchor3/docs/ENGINE_API.md:1245:layer_apply_shader(game, shaders.composite)
/e/a327ex/Anchor3/docs/ENGINE_API.md:1248:### layer_apply_shader
/e/a327ex/Anchor3/docs/ENGINE_API.md:1250:`layer_apply_shader(layer, shader)`
/e/a327ex/Anchor3/docs/ENGINE_API.md:1256:layer_apply_shader(layer, blur_shader)
/e/a327ex/Anchor3/docs/ENGINE_API.md:3094:Returns the backing 2D Layer — usable with ALL `layer_*` functions (composite via `layer_draw`, post-process via `layer_apply_shader`, etc.).
=== example usage anywhere ===
/e/a327ex/BYTEPATH++/main.lua:240:        layer_apply_shader(game_layer, shaders.displacement)
/e/a327ex/BYTEPATH++/main.lua:252:        layer_apply_shader(bloom_layer, shaders.bright_pass)
/e/a327ex/BYTEPATH++/main.lua:256:            layer_apply_shader(bloom_layer, shaders.blur)
/e/a327ex/BYTEPATH++/main.lua:258:            layer_apply_shader(bloom_layer, shaders.blur)
/e/a327ex/BYTEPATH++/main.lua:275:            layer_apply_shader(final_layer, shaders.bloom_combine)
/e/a327ex/BYTEPATH++/main.lua:284:            layer_apply_shader(final_layer, shaders.crt)
=== head of an existing frag ===
// Grayscale shader — luminance-based desaturation of the input texture.
// Preserves alpha. Used for the unaffordable shop-tile emoji so it reads
// as "off-limits" with no color, regardless of the source emoji's palette.
in vec2 TexCoord;
out vec4 FragColor;
uniform sampler2D u_texture;

void main() {
    vec4 tex = texture(u_texture, TexCoord);
    float lum = 0.299*tex.r + 0.587*tex.g + 0.114*tex.b;
    FragColor = vec4(lum, lum, lum, tex.a);
}

Binds a texture to a sampler uniform. The 4th argument accepts either a Texture handle (from `texture_load`) or a raw GL texture id integer (e.g. from `layer_get_texture`) — the integer form lets one layer's texture feed another layer's post-process pass (displacement maps etc.). `unit` defaults to 1; unit 0 is reserved for the layer's own texture. Units >= 2 also work from the draw shader (set via `get_draw_shader`), not just post-process shaders.

```lua
local wall_tex = layer_get_texture(wall_layer)
layer_shader_set_texture(game, shaders.composite, 'u_wall_texture', wall_tex, 1)
layer_apply_shader(game, shaders.composite)
```

### layer_apply_shader

`layer_apply_shader(layer, shader)`

Applies a shader to the layer's current contents (ping-pong rendering). Queued: it only runs inside that layer's `layer_render`.

```lua
layer_shader_set_float(layer, blur_shader, "u_radius", 4.0)
layer_apply_shader(layer, blur_shader)
```

---

## Custom Draw Shader

The engine's default draw shader handles SDF rendering of all shapes (rectangles, circles, lines, triangles, polygons). You can replace the fragment shader with a custom one that adds game-specific logic while keeping the same vertex shader and SDF pipeline.

### set_draw_shader

`set_draw_shader(path)`

Loads a custom fragment shader from file and replaces the engine's default draw shader. The shader is compiled with the engine's vertex shader (which provides vPos, vUV, vColor, vType, vShape0-4, vAddColor). On web, when `KHR_parallel_shader_compile` is available, the compile runs asynchronously in the background — the engine keeps rendering with the current program until the new one links, and `get_draw_shader` returns nil in the interim.
... [28 more lines]

I see the shader setup needs to happen during the draw phase, before the emoji pipeline renders the layers. I'll call the shader configuration functions in `draw_wave_fx` right after drawing the mask, then apply the shader to the wave layer.

For loading, `shader_load_file` is headless-safe since the emoji pipeline uses it unconditionally at module scope. I'll avoid the `*_immediate` bindings that can segfault headless and stick with the guarded `layer_shader_set_*` functions instead.

Writing the fragment shader... Writing shader code... Writing the color ramp function... The shader's bright term at depth 0 gives near-crest color but not pure white, so I'm considering whether to keep a crisp 2px crest break line drawn on the CPU side in wave_crest while the rest goes to wave_deep — though the shader will overwrite it since it replaces color entirely for opaque pixels. I could instead let the shader handle the break line itself since it has depth information available. the CPU drawing per-pixel ramps would require too many rectangles. Instead, I'll have the shader compute the crest curve itself using the same sine wave constants that Lua passes as uniforms — this keeps the math in one place and avoids drift between CPU and GPU calculations.

The safest approach is to let the CPU draw the white break band and dark body, then have the shader check the brightness of that mask: if the pixel is bright (the crest band), pass it through unchanged; if it's dark (the body), apply the depth shading. A simple brightness threshold handles this with a one-line guard, avoiding any curve duplication or pixel-level disagreements.

For the depth calculation, I'll use the flat front position (which varies by at most a few pixels and doesn't matter for the color ramp) divided by the reach to get a normalized depth value.

Writing the CPU draw function... Setting up shader uniforms... I need to work out the drift parameters more carefully. The prototype uses t in noise space, and I'm scaling that down by 0.016, so a drift of 3.0 in noise space translates to about 187 pixels. Over the animation's time range that gives me roughly 67 pixels of drift, which feels reasonable for the water effect.…

File created successfully at: E:\a327ex\ABAgames\knightvspawns\assets\water.frag (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (note: the file had been modified on disk since you last read it — the edit applied cleanly, but the file contains other changes not in your context. Read it before edits that depend on surrounding content.)

8955 -- ⚠ CLIPPED TO THE SCREEN (plus WAVE_MARGIN), which is also how it enters and
8956    -- leaves: the run starts below the bottom and the drain returns there, so the
8957    -- water washes on and off without a fade and nothing here needs alpha.
8958    -- ⚠ Drawn per COLUMN, top-down. layer_rectangle is TOP-LEFT (layer_image is
8959    -- centred), so each band's y IS its top edge.
8960    -- ⚠ The bright head SCALES with the drain, and the crest keeps its share — a wave
8961    -- that lost only its deep band would drain into a hard bright line.
8962    function draw_wave_fx()
8963      if not wave_fx then return end
8964      local top, bot   = -WAVE_MARGIN, gh + WAVE_MARGIN
8965      local front, bs  = wave_front_at(wave_fx.t)
8966      local phase      = wave_fx.t*WAVE_PHASE
8967      local crest_h, mid_h = WAVE_CREST*bs, WAVE_MID*bs
8968      local head  = crest_h + mid_h + WAVE_DEEP*bs   -- bright head + the gap before the first streak
8969      -- how far back the water still lies. Scaled by the drain, so the body SHRINKS
8970      -- toward the crest as it empties rather than fading in place.
8971      local reach = (gh + WAVE_MARGIN*2)*bs
8972      -- ⚠ THE DEPTH LADDER IS THE SAME FOR EVERY COLUMN — the gaps do not depend on
8973      -- x — so it is built ONCE. That is not just cheaper: knowing `n` up front is
8974      -- what lets the tone ramp be spent per LINE instead of per pixel of depth.
8975      local dep, n, d, gap = {}, 0, head, WAVE_RIPPLE_GAP
8976      for i = 1, WAVE_RIPPLE_MAX do
8977        d, gap = d + gap, gap*WAVE_RIPPLE_GROW
8978        if d >= reach then break end
8979        n = n + 1; dep[n] = d
8980      end
8981      for x = -WAVE_MARGIN, gw + WAVE_MARGIN - WAVE_STEP, WAVE_STEP do
8982        local cy = wave_crest_y(x, front, phase)
8983        -- ⚠ THE TRAILING EDGE IS A CURVE TOO, not a straight cut. While the wave
8984        -- drains this edge is on screen and a ruler-straight bottom would give the
... [25 more lines]

rewrote draw_wave_fx

8810:WAVE_RIPPLE_GAP  = 8      -- px from the bright head down to the first line
8814:WAVE_RIPPLE_GROW = 1.20
8818:WAVE_LINE_TOP    = 2
8820:WAVE_RIPPLE_MAX  = 40     -- iteration backstop; the body's depth ends it first
8828:WAVE_RAMP        = 1.0
8923:function wave_tone(a, b, u)

pruned

952:wave_tmp    = color(0, 0, 0)        -- scratch for the depth ramp; mutated and packed per draw
-- clean if empty --
fxsmoke: no errors

-- clean --
WAVE_TAIL_I      = 5      -- which lagged curve shapes the water's trailing edge
-- ⭐ THE FORMATION. `LAG` is the phase each line trails the one above it by, so it
-- is also how far the pattern slides sideways between them — bigger leans the
-- whole train into a diagonal, smaller stacks them nearly on top of each other.
fxsmoke: no errors

I'm realizing I can't verify GLSL compilation in headless mode since it skips GL entirely—a shader syntax error in water.frag would only surface at runtime when a window is actually created. I'm considering whether a GLSL validator like `glslangValidator` might be available, or if I need to rely on careful code review instead.…

Traceback (most recent call last):

--- version directive convention ---
// Outline shader - samples neighbors to detect alpha edges

// Outputs black where any neighbor has alpha, creating silhouette outline

in vec2 TexCoord;

out vec4 FragColor;

...
assets/draw_shader.frag:0
assets/grayscale.frag:0
assets/outline.frag:0
assets/outline_only.frag:0
assets/recolor.frag:0
assets/shadow.frag:0
assets/water.frag:0

No validator is available, so I'm confirming the shader convention manually—no `#version` directive since the engine prepends it, and my declarations for `in vec2 TexCoord`, `out vec4 FragColor`, and `uniform sampler2D u_texture` all match the expected pattern. Now I'm doing a careful review of the water.frag file to check for GLSL correctness, starting with verifying the input/output variables and uniform declarations.

All the standard GLSL functions like `fract`, `sin`, `dot`, `floor`, `mix`, `clamp`, `pow`, `abs`, `max`, and `texture` are available, and my function declaration order is correct—each function only calls previously-declared ones. The control flow looks solid too: `ramp4` returns in all code paths, and `main` uses early returns which are fine in GLSL. Vector operations like `vec2 * float` and the arithmetic with `u_drift * u_time` are all valid.

There's one key detail to verify: the CPU draws the crest band as wave_crest (206,240,255) with r = 0.807, which exceeds my 0.6 threshold, while the body is wave_deep (38,96,168) with r = 0.149, which is below it—so the color separation works. But the wave layer is outlined, meaning the outline pass runs after the wave layer renders, so my shader executes first and then the outline is applied on top, which is fine. The outline reads the layer's texture after my shader has already modified it, so there's no conflict there.

I'm also checking that the uniform setup matches BYTEPATH++'s pattern: set uniforms, then call apply_shader. The `layer_shader_set_vec4` signature takes the layer, shader, name, and four float components, which matches what I'm doing. All my uniforms are actually used in the shader—`u_edge_min`, `u_edge_depth`, and `u_resolution` are all referenced unconditionally, so there's no risk of the compiler optimizing them out and causing errors when I try to set them.

I can't actually compile and test this myself, but if the shader fails to compile, the wave will gracefully fall back to rendering as a flat blue silhouette with a white crest line, which is obvious enough to catch. I should verify the final setup and check that `shader_load_file` is safe to call at module scope in main.lua—pipeline.lua does the same thing with five shaders and it works fine in headless mode, plus it didn't error during fxsmoke testing.…

fxsmoke: no errors
replays: 8/8 passed
replays: 8/8 passed
warning: in the working copy of 'main.lua', LF will be replaced by CRLF the next time Git touches it
 main.lua | 628 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 612 insertions(+), 16 deletions(-)
 M emoji/volume_tuning.lua
 M fx_done.lua
 M fx_lab.lua
 M fxsmoke.lua
 M items.lua
 M items_catalog.md
 M main.lua
 M sound_moments.lua
?? assets/water.frag

I'm shifting to a simpler approach: keep the water's silhouette as-is, but fill it with a gradient that follows the crest curve downward rather than a flat screen axis, using dithering patterns from the SNKRX template to transition from deep blue at the bottom to white at the crest.

I want to add a few dither options that can be swapped live with keyboard controls. Rather than doing this CPU-side with per-pixel rectangles, I'll stick with the shader that's already wired up and replace its logic to calculate depth from the crest curve, apply a dither threshold, and output a two-tone or multi-tone color based on that depth — much simpler than the noise approach and reuses all the existing plumbing.

The key challenge is getting the per-column crest y-value into the shader. I could duplicate the curve formula in GLSL by passing the amplitude and phase parameters as uniforms, or I could encode the depth in the CPU-drawn color. Since the CPU already knows the exact crest y for each column, passing the curve parameters (front, swell amplitude, swell frequency, chop amplitude, chop frequency, phase) as six floats lets the shader recompute the crest shape exactly — no duplication, and it's cheap. Actually, I'm realizing I could skip the shader entirely and do the dithering on the CPU side with a clever approach using the Bayer matrix pattern.

Wait, no — CPU dithering would need per-pixel rectangles, which defeats the purpose. The shader approach is cleaner. So I'll keep the fragment shader and rewrite it to compute the crest y from the uniforms, then calculate depth as the distance from that crest, normalize it to a gradient value, and apply a Bayer dither threshold to decide between white at the crest and blue at the bottom.

I should support multiple dither modes — Bayer 2x2, 4x4, 8x8, and noise — selectable via a uniform, with keybindings to swap between them. Let me check the existing dither implementations in the local draw_shader.frag and the SNKRX template to see how they handle the different matrices and noise approaches.…

// DITHER — quantize the continuous field f to N discrete levels using a
// per-pixel threshold function. apply_dither returns a value in
// {0, 1/(N-1), 2/(N-1), …, 1}. Downstream color='mix' lerps mix(A, B, f)
// by that value:
//   N=2  → hard A or B regions, no intermediate. Strict palette snap.
//   N=4  → A, 1/3-mix, 2/3-mix, B. Soft transitions in 4 bands.
//   N=16 → effectively smooth gradient. Use for soft fades.
//
// Thirty-four modes total. 2-level group (modes 1..3) sits at the top of
// the cycle for the strict-palette default; multi-level groups follow in
// family order (bayer, white noise, cluster dots, line_diag, line_diag_flip,
// scanlines, triangle, hearts). Threshold functions ported verbatim from
// snkrx-template (which inherited them from Surma's ditherpunk catalog +
// Invoker's orb dither). Procedural patterns (line/cluster/triangle/hearts)
// derive their threshold from gl_FragCoord — no const matrices, trivial to
// reparameterize.
// =============================================================================

const float BAYER2[4] = float[4](
    0.0, 2.0,
    3.0, 1.0
);
const float BAYER4[16] = float[16](
     0.0,  8.0,  2.0, 10.0,
    12.0,  4.0, 14.0,  6.0,
     3.0, 11.0,  1.0,  9.0,
    15.0,  7.0, 13.0,  5.0
);
const float BAYER8[64] = float[64](
     0.0, 32.0,  8.0, 40.0,  2.0, 34.0, 10.0, 42.0,
... [16 more lines]

/e/a327ex/snkrx-template/.claude/CLAUDE.md
/e/a327ex/snkrx-template/anchor.exe
/e/a327ex/snkrx-template/assets/draw_shader.frag
/e/a327ex/snkrx-template/main.lua
/e/a327ex/snkrx-template/main_old.lua
/e/a327ex/snkrx-template/main_scaffold.lua
/e/a327ex/snkrx-template/README.md
/e/a327ex/snkrx-template/reference/template_merge_analysis.md
/e/a327ex/snkrx-template/snkrx/effect.lua
/e/a327ex/snkrx-template/snkrx/effect_lab.lua

float apply_dither(float field, int mode, vec2 pix) {
    // 2-level group (strict palette snap; pairs naturally with color='mix').
    if (mode == 1)  return dither_quantize(field,  2.0, bayer4(pix));
    if (mode == 2)  return dither_quantize(field,  2.0, bayer8(pix));
    if (mode == 3)  return dither_quantize(field,  2.0, dither_noise(pix));

    // Bayer ordered-dither, multi-level.
    if (mode == 4)  return dither_quantize(field,  4.0, bayer2(pix));
    if (mode == 5)  return dither_quantize(field,  4.0, bayer4(pix));
    if (mode == 6)  return dither_quantize(field,  8.0, bayer4(pix));
    if (mode == 7)  return dither_quantize(field,  7.0, bayer8(pix));
    if (mode == 8)  return dither_quantize(field,  9.0, bayer8(pix));
    if (mode == 9)  return dither_quantize(field, 16.0, bayer8(pix));

    // White-noise stipple, multi-level.
    if (mode == 10) return dither_quantize(field,  4.0, dither_noise(pix));
    if (mode == 11) return dither_quantize(field,  8.0, dither_noise(pix));

    // Cluster dot / halftone.
    if (mode == 12) return dither_quantize(field,  8.0, dither_cluster_dot(pix, 4.0));
    if (mode == 13) return dither_quantize(field, 12.0, dither_cluster_dot(pix, 6.0));
    if (mode == 14) return dither_quantize(field, 16.0, dither_cluster_dot(pix, 8.0));

    // Diagonal stripes, periods 2..8.
    if (mode == 15) return dither_quantize(field,  2.0, dither_line_diag(pix, 2.0));
    if (mode == 16) return dither_quantize(field,  3.0, dither_line_diag(pix, 3.0));
    if (mode == 17) return dither_quantize(field,  4.0, dither_line_diag(pix, 4.0));
    if (mode == 18) return dither_quantize(field,  5.0, dither_line_diag(pix, 5.0));
    if (mode == 19) return dither_quantize(field,  6.0, dither_line_diag(pix, 6.0));
    if (mode == 20) return dither_quantize(field,  7.0, dither_line_diag(pix, 7.0));
... [73 more lines]

I'm rewriting the water fragment shader to use a simple dithered gradient that follows the wave crest curve, transitioning from white at the crest to blue at the bottom, with the crest parameters computed directly in the shader using the wave surface formula. I'm debating whether to use individual number keys for each dither mode or a single cycle key instead. The user asked for "a few options on a few keys," but I'm concerned about conflicts with existing bindings. Let me check what's already mapped and go with a safer approach—probably a dedicated key that cycles through the modes with the current name displayed on the HUD.…

'click',   'mouse:1')         -- cursor + move commit read 'click'
'toggle_sound_tuner', 'key:f3')   -- pressing H on the SITE got the A/B hit
'ui_gallery_prev',    'key:[')    -- preview (player-reported 2026-07-24)
'ui_gallery_next',    'key:]')
'toggle_hit_sound',   'key:h')
'toggle_skull_panel', 'key:f6')   -- KVP4 rig: director / skull-density panel
'spawn_skull',        'key:k')    -- KVP4 rig: drop a skull on demand
'spawn_tank',         'key:t')    -- KVP4 rig: bounce-test pair (both tanky)
'spawn_tank_soft',    'key:y')    -- KVP4 rig: same pair, 1-HP blocked pawn
'toggle_spawns',      'key:n')    -- KVP4 rig: stop the flood while testing
'v_next', 'key:period')
'v_shift', 'key:lshift')
'v_run', 'key:tab')
'v_speed2', 'key:2')
'v_speed4', 'key:4')
'v_addmark', 'key:m')
'v_out', 'key:o')
'v_save', 'key:s')
'toggle_viewer', 'key:f4')   -- open/close the viewer, beside F3's sound tuner
'toggle_edit',   'key:f5')   -- open/close the clip editor / timeline
'e_shift','key:lshift')
'e_right','key:right')
'e_fnext','key:.')
'e_play','key:space')
'e_playall','key:p')
'e_zoomreset','key:0')
'e_pand','key:s')
'e_del','key:x')
'e_beatsync','key:b')
'toggle_fxlab', 'key:f7')
... [9 more lines]

Looking at which keys are available for binding in the F7 lab context—number keys 1 through 9 are mostly unbound since the viewer speed and editor zoom controls only activate in their respective modes, and the lab itself uses space, s, c, e, q, enter, and backspace for its functions. So the number keys should be free to use for testing.

The viewer binds on keys 2 and 4 would technically double-fire if both systems read them, but since the viewer won't be open during lab testing, that overlap is acceptable. I'll bind keys 1 through 8 directly to the dither modes for straightforward switching, then move on to writing the shader code.…

float bayer4(vec2 pix) {
    int x = int(mod(pix.x, 4.0));
    int y = int(mod(pix.y, 4.0));
    return BAYER4[y * 4 + x] / 16.0;
}

float bayer8(vec2 pix) {
    int x = int(mod(pix.x, 8.0));
    int y = int(mod(pix.y, 8.0));
    return BAYER8[y * 8 + x] / 64.0;
}

// Pseudo-random hash from pixel coords. Classic GLSL sin-fract trick;
// sufficient for stochastic dither stipple.
float dither_noise(vec2 pix) {
    return fract(sin(dot(pix, vec2(12.9898, 78.233))) * 43758.5453);
}

// Diagonal stripes: threshold ramps along x + y modulo n. Period n.
float dither_line_diag(vec2 pix, float n) {
    return mod(floor(pix.x) + floor(pix.y), n) / n;
}

// Anti-diagonal stripes: threshold ramps along x - y modulo n. GLSL's mod
// handles negative inputs correctly so no offset trick needed.
float dither_line_diag_flip(vec2 pix, float n) {
    return mod(floor(pix.x) - floor(pix.y), n) / n;
}

// Horizontal scanlines, period 2.
... [29 more lines]

float dither_quantize(float field, float levels, float threshold) {
    return clamp(floor(field * levels + threshold), 0.0, levels - 1.0) / (levels - 1.0);
}

float apply_dither(float field, int mode, vec2 pix) {
    // 2-level group (strict palette snap; pairs naturally with color='mix').
    if (mode == 1)  return dither_quantize(field,  2.0, bayer4(pix));
    if (mode == 2)  return dither_quantize(field,  2.0, bayer8(pix));
    if (mode == 3)  return dither_quantize(field,  2.0, dither_noise(pix));

    // Bayer ordered-dither, multi-level.
    if (mode == 4)  return dither_quantize(field,  4.0, bayer2(pix));
    if (mode == 5)  return dither_quantize(field,  4.0, bayer4(pix));

The file E:\a327ex\ABAgames\knightvspawns\assets\water.frag has been updated successfully. (file state is current in your context — no need to Read it back)

constants swapped

8971:  ss(wave_layer, water_shader, 'u_scale',      WATER_SCALE)
8972:  ss(wave_layer, water_shader, 'u_aspect',     WATER_ASPECT)
8973:  ss(wave_layer, water_shader, 'u_bands',      WATER_BANDS)
8974:  ss(wave_layer, water_shader, 'u_edge_min',   WATER_EDGE_MIN)
8975:  ss(wave_layer, water_shader, 'u_edge_depth', WATER_EDGE_DEPTH)
8976:  ss(wave_layer, water_shader, 'u_bright',     WATER_BRIGHT)
8977:  ss(wave_layer, water_shader, 'u_dark',       WATER_DARK)
8979:  layer_shader_set_vec2(wave_layer, water_shader, 'u_drift', WATER_DRIFT_X, WATER_DRIFT_Y)

uniforms rewritten

function draw_wave_fx()
  if not wave_fx then return end
  local top, bot  = -WAVE_MARGIN, gh + WAVE_MARGIN
  local front, bs = wave_front_at(wave_fx.t)
  local phase     = wave_fx.t*WAVE_PHASE
  local crest_h   = WAVE_CREST*bs
  -- how far back the water still lies. Scaled by the drain, so the body SHRINKS
  -- toward the crest as it empties rather than fading in place.
  local reach = (gh + WAVE_MARGIN*2)*bs
  -- ⭐ THE CPU ONLY DRAWS THE SILHOUETTE NOW. Two rects per column: the body in
  -- flat deep blue for water.frag to fill in, and the break in near-white, which
  -- the shader hands back untouched (see its `src.r > 0.6` test). All the band
  -- and line machinery this used to carry is gone — the surface is per-PIXEL and
  -- 2D now, which is the one thing a per-column draw could never be.
  for x = -WAVE_MARGIN, gw + WAVE_MARGIN - WAVE_STEP, WAVE_STEP do
    local cy = wave_crest_y(x, front, phase)
    -- ⚠ THE TRAILING EDGE IS A CURVE TOO, not a straight cut. While the wave
    -- drains this edge is on screen and a ruler-straight bottom would give the
    -- whole illusion away — it gets its own flatter, slower-drifting surface.
    local ty = wave_surface_y(x, front + reach, phase, WAVE_TAIL_I)
    local y0, y1 = math.max(cy, top), math.min(ty, bot)
    if y1 > y0 then
      wave_band(x, cy, y1, y0, y1, wave_deep())
      wave_band(x, cy, cy + crest_h, y0, y1, wave_crest())
    end
  end
  -- ⚠ QUEUED: layer_apply_shader only runs inside this layer's layer_render, so
  -- it is asked for AFTER the draws it processes and still lands in order.
  if not water_shader then return end
... [17 more lines]

The shader's gradient already produces white at the crest, so the CPU's crest band is redundant and I should remove it. I'll also update the comment…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (note: the file had been modified on disk since you last read it — the edit applied cleanly, but the file contains other changes not in your context. Read it before edits that depend on surrounding content.)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

9420:  if not GAME_HOSTED and input_pressed('debug_grant') and game_state == 'playing'
9443:  if not GAME_HOSTED and input_pressed('debug_heal') and game_state == 'playing'

9443   if not GAME_HOSTED and input_pressed('debug_heal') and game_state == 'playing'
9444         and not replay_mode and not sound_tuner_active and not sb_text_focused()
9445         and not FXLAB then
9446        if hp < hp_max then hp = hp + 1 end
9447        heal_vfx()
9448      end
9449    
9450      -- L cycles the glossary language. Pure UI: no sim state, no grng, nothing
9451      -- recorded — a run where L was pressed still replays. lang_set drops every
9452      -- cached measurement, since all the strings just changed underneath them.

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

1307:  if not FXLAB.choosing and not FXLAB.naming then return end
1325:               action = function() FXLAB.choosing, FXLAB.naming = nil, nil end })
1354:  if FXLAB.naming then

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

-- clean if empty --
fxsmoke: no errors

replays: 8/8 passed
replays: 8/8 passed

The gradient direction is inverted—white needs to be at the top near the crest while blue sits at the bottom, but my current shader formula is producing the opposite. I'm checking the math: at the crest position, the value should give white, not blue.…

// Shadow shader - creates a dark, semi-transparent silhouette

// Draw this layer at an offset to create drop shadow effect



in vec2 TexCoord;

out vec4 FragColor;

uniform sampler2D u_texture;



void main() {

    float a = texture(u_texture, TexCoord).a;

    FragColor = vec4(0.5, 0.5, 0.5, a * 0.5);

}

=== how shadow offset is set ===
51:shadow_shader       = shader_load_file('assets/shadow.frag')
170:      layer_draw_from(emoji_shadow_layer, _G[def[1] .. '_layer'], shadow_shader)

The symptom is clear: I'm rendering white at the bottom when it should appear at the crest, which means …

The file E:\a327ex\ABAgames\knightvspawns\assets\water.frag has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: no errors
22:in vec2 TexCoord;
110:    vec4 src = texture(u_texture, TexCoord);
113:    // ⛔ Y IS FLIPPED COMING OUT OF THE LAYER. The FBO's TexCoord.y runs
119:    vec2 px = vec2(TexCoord.x, 1.0 - TexCoord.y) * u_resolution;

I need to make two adjustments: set the dither mode to 6 for cluster halftone dots as the default, and add slight transparency to the water. The tricky part is that the wave layer is outlined, which causes transparency issues—the outline shader fills the silhouette black including the interior, so applying alpha to an outlined layer makes it look murky. I need to fix the layer itself rather than just adjusting the alpha value.…

// Outline shader - samples neighbors to detect alpha edges

// Outputs black where any neighbor has alpha, creating silhouette outline

in vec2 TexCoord;

out vec4 FragColor;

uniform sampler2D u_texture;

uniform vec2 u_pixel_size;



void main() {

    // Sample center pixel

    vec4 center = texture(u_texture, TexCoord);



    // Sample 24 neighbors in 5x5 grid (excluding center)

    float x = u_pixel_size.x;

    float y = u_pixel_size.y;



    float a = 0.0;

    // Row -2

    a += texture(u_texture, TexCoord + vec2(-2.0*x, -2.0*y)).a;

    a += texture(u_texture, TexCoord + vec2(-1.0*x, -2.0*y)).a;

    a += texture(u_texture, TexCoord + vec2( 0.0,   -2.0*y)).a;

    a += texture(u_texture, TexCoord + vec2( 1.0*x, -2.0*y)).a;

    a += texture(u_texture, TexCoord + vec2( 2.0*x, -2.0*y)).a;

    // Row -1

    a += texture(u_texture, TexCoord + vec2(-2.0*x, -1.0*y)).a;

    a += texture(u_texture, TexCoord + vec2(-1.0*x, -1.0*y)).a;

    a += texture(u_texture, TexCoord + vec2( 0.0,   -1.0*y)).a;

    a += texture(u_texture, TexCoord + vec2( 1.0*x, -1.0*y)).a;

    a += texture(u_texture, TexCoord + vec2( 2.0*x, -1.0*y)).a;

    // Row 0 (skip center)

    a += texture(u_texture, TexCoord + vec2(-2.0*x,  0.0)).a;

... [24 more lines]

The outline shader is creating a black silhouette wherever any neighboring pixel has alpha, which means it's drawing a solid black copy of the entire water shape behind the translucent layer—defeating the transparency effect. To fix this, I need to remove the outline from the wave layer entirely, accepting that the water will lose its black rim at the crest as a tradeoff for proper translucency.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\assets\water.frag has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\assets\water.frag has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

Created layer: wave (rough)
fxsmoke: no errors
replays: 6/6 passed

So the approach is to use a dither pattern that discards pixels rather than blending them—some pixels stay fully opaque water while others become fully transparent to reveal what's behind. This gives the appearance of transparency through stippling, which is the authentic pixel-art technique and keeps each pixel either fully opaque or fully transparent instead of using alpha blending.

But here's the problem: if I punch holes in the content layer with the dither pattern, the outline shader will see those holes as transparent neighbors and draw black outlines around every single hole, not just the outer edge of the water mass. The outline layer sits underneath the content layer, so the black silhouette shows through wherever the dither pattern discards pixels, creating unwanted internal outlines instead of just the clean border around the whole shape.

I could try drawing the crest outline manually in the shader instead of relying on the outline pass — since the shader already knows the curve, I could emit a black line just above it to get that rim effect without triggering the outline shader on the internal holes.

The approach would be to have the CPU draw a black band above the crest curve, then the water body below it, and have the shader recognize that black band and pass it through untouched while applying the dither-as-transparency effect to the water pixels themselves.

For the transparency stipple, I'd use the cluster-dot dither pattern where the threshold grows with the water depth — fully opaque near the crest and increasingly sparse toward the back, creating a gradient where the water fades out naturally rather than having a hard edge.

Actually, rereading the request, I think he wants a uniform transparency across the whole water surface, not depth-dependent. So I need two separate dither applications: one for the blue-to-white gradient coloring, and another fixed-density stipple that punches holes uniformly to create the see-through effect. I can implement this by discarding pixels based on the cluster-dot pattern against a fixed alpha threshold. The outline compositing is creating a problem — if I punch holes in the layer, the outline shader will just show black underneath where those holes are. I need to figure out whether the outline layer sits above or below the content, and how the layer ordering actually works in the pipeline. Let me trace through how the outline layers get created and composed together. Option A is the way forward: skip the outline layer entirely and draw the crest outline directly on the CPU side as a black band above the water body. This gives me exactly what he wants—the outline specifically at the top edge—while keeping stipple transparency working correctly. I'll draw black pixels from the crest top down by the outline height, then render the water body below.

For the shader, I need to detect that black band and pass it through opaque without any stipple or gradient effects. Since I'm drawing pure black (0,0,0) and the water is wave_deep (38,96,168), I can test if the color sum is below a threshold to identify the outline. For actual water pixels, I'll apply the gradient and dither as usual, then use the cluster pattern to stipple-discard. When discard happens in the ping-pong post-process, it leaves the output texture transparent at that pixel.

Actually, setting alpha to 0 is safer than using discard — no branching, same transparency effect. I'll use `FragColor = vec4(rgb, 0.0)` for the stippled pixels. The black outline band sits above the crest, so I need to extend the drawn region upward by the outline height to ensure it renders correctly.

Defining shader constants... I'm noticing that `black` gets its alpha mutated in different places, which could cause issues. I'll define a dedicated `wave_rim` color instead to keep the rim rendering consistent. Now I'm writing the shader logic to handle the rim detection and apply dithering for the water transparency effect.

The key insight is that the stipple pattern should match whatever dither mode is selected, so switching modes affects both the quantization and the stipple threshold. I need to create a helper function that returns the threshold for any given mode, then use that same function for both effects.

Writing shader function... So the threshold approach keeps pixels where the threshold value is below the alpha cutoff—1.0 means fully opaque, 0.88 removes about 12% of pixels in a stipple pattern. The rim gets excluded from stippling by the early return, which is good. Let me code this up and make sure the semantics are consistent across both dithering and stippling modes…

The file E:\a327ex\ABAgames\knightvspawns\assets\water.frag has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\assets\water.frag has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\assets\water.frag has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\assets\water.frag has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

    local ty = wave_surface_y(x, front + reach, phase, WAVE_TAIL_I)
    local y0, y1 = math.max(cy, top), math.min(ty, bot)
    -- the rim sits ABOVE the crest, so the drawn span starts there
    local y0, y1 = math.max(cy - WATER_OUTLINE, top), math.min(ty, bot)
    if y1 > y0 then
      wave_band(x, cy - WATER_OUTLINE, cy, y0, y1, wave_rim())
      wave_band(x, cy, y1, y0, y1, wave_deep())
    end
  end
  -- ⚠ QUEUED: layer_apply_shader only runs inside this layer's layer_render, so
  -- it is asked for AFTER the draws it processes and still lands in order.

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

-- clean if empty --
fxsmoke: no errors

replays: 6/6 passed
replays: 6/6 passed

The user wants to revert to a dithered gradient with full fill coverage—no transparency stippling or holes—and restore the outline at the top that appeared before. So I need to set the water to full opacity and bring back the solid appearance with the dithering effect.

With a completely opaque fill, the engine's outline pass will work properly again, giving a rim around the entire water silhouette. The simplest approach is to restore the outlined layer and remove the hand-drawn rim I added as a workaround, along with stripping out the stipple transparency logic from the shader. This gets us back to the "perfect" state from two turns ago: dithered, solid, and outlined.

Reverting the changes...…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\assets\water.frag has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\assets\water.frag has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\assets\water.frag has been updated successfully. (file state is current in your context — no need to Read it back)

-- clean if empty --
Created layer: wave (rough)
Created layer: wave_outline (rough)
fxsmoke: no errors

replays: 6/6 passed
replays: 6/6 passed
void main() {
    vec4 src = texture(u_texture, TexCoord);
    if (src.a < 0.01) { FragColor = src; return; }

    // ⛔ Y IS FLIPPED COMING OUT OF THE LAYER. The FBO's TexCoord.y runs
    // BOTTOM-UP, while u_front and the crest curve arrive from Lua in top-down
    // screen coordinates — so comparing them raw puts the white at the bottom of
    // the water instead of at the break. Nothing else in this project's shaders
    // reads an absolute y (outline/shadow/grayscale are all offset-symmetric or
    // per-texel), so there was no local precedent to inherit: hence the note.
    vec2 px = vec2(TexCoord.x, 1.0 - TexCoord.y) * u_resolution;
    // 1 at the break, 0 at the back of the water — the whole body ramps
    float f = 1.0 - clamp((px.y - crest_at(px.x)) / max(u_reach, 1.0), 0.0, 1.0);

    float lv = water_levels(u_dither);
    float d  = (lv < 2.0) ? f : dither_quantize(f, lv, water_threshold(u_dither, px));
    FragColor = vec4(mix(u_blue.rgb, u_white.rgb, d), src.a);
}

He's specified the sound effects for the wave: one for when the enemy gets pushed and a couple of options for the actual wave impact itself. I'll convert whichever ones he picks using ffmpeg at quality 10, keeping the full length and all channels without any trimming.

Now I'm interpreting his selections — the "or" notation suggests he wants multiple variants that…

/e/sound packs/Gamemaster Audio - Pro Sound Collection/Magic_Spells/water_spell_tidal_wave_drown_01.wav
/e/sound packs/Gamemaster Audio - Pro Sound Collection/Magic_Spells/water_spell_tidal_wave_drown_02.wav
/e/sound packs/Gamemaster Audio - Pro Sound Collection/Magic_Spells/water_spell_tidal_wave_drown_03.wav
/e/sound packs/Gamemaster Audio - Pro Sound Collection/Magic_Spells/water_spell_tidal_wave_drown_04.wav
/e/sound packs/Gamemaster Audio - Pro Sound Collection/Magic_Spells/water_spell_wave_crash_01.wav
/e/sound packs/Gamemaster Audio - Pro Sound Collection/Magic_Spells/water_spell_wave_crash_02.wav

$RECYCLE.BIN/
DumpStack.log.tmp
References.library/
SteamLibrary/
System Volume Information/
a327ex/
downloads/
kimi-tests/
media/
mira-threnn/
private/
sound packs/
tmp/
torrents/
=== searching ===
/e/sound packs/RPG Magic Sound Effects Pack 3 [ELEMENTAL]/Water Magic/RPG3_WaterMagicEpic_WaveImpact01.wav
/e/sound packs/RPG Magic Sound Effects Pack 3 [ELEMENTAL]/Water Magic/RPG3_WaterMagicEpic_WaveImpact02.wav
/e/sound packs/RPG Magic Sound Effects Pack 3 [ELEMENTAL]/Water Magic/RPG3_WaterMagicEpic_WaveImpact03.wav

I found the RPG3 path with the bracket notation, so I'll copy those files to a temporary directory first. Then I'm converting them with ffmpeg using quality setting 10, keeping the full length and all channels without any trimming. Looking at the existing naming pattern in the assets/sounds directory—files like `wall_block.ogg`, `fx_wobbling_jelly.ogg`, and `capture_impact1.ogg`—I'm naming the new sound files to match that convention, starting with `wave_impact1.ogg`.

For the variants, I'm following the game's existing pattern where sounds like `capture_impact` have numbered variants (1, 2, 3) that work with `sfx_any()`. So I'm mapping the two wave impact files as variants 1 and 2, the wave crash files as variants 1 and 2, and the tidal wave drown files as variants 1 through 4. Once converted, I'll declare each sound, set their volumes, then wire them up—one crash variant and one drown variant play when the wave hits, and an impact variant plays for each pawn pushed. Since the wave staggers the pushes over about 0.34 seconds, each pawn's impact fires at its own time rather than stacking all at once. Scheduling impact sounds per pawn...

I need to check the `sfx_any` function signature and see if these wave sounds are registered in the sound lab so…

crash1.wav
crash2.wav
drown1.wav
drown2.wav
drown3.wav
drown4.wav
imp1.wav
imp2.wav

341440 assets/sounds/wave_crash1.ogg
397924 assets/sounds/wave_crash2.ogg
289453 assets/sounds/wave_drown1.ogg
325896 assets/sounds/wave_drown2.ogg
288608 assets/sounds/wave_drown3.ogg
333424 assets/sounds/wave_drown4.ogg
117995 assets/sounds/wave_impact1.ogg
111106 assets/sounds/wave_impact2.ogg

Exit code 1
sed: -e expression #1, char 1: unknown command: `,'

emoji/sounds.lua:304:function sfx_any(prefix, n, volume, pitch)
304:function sfx_any(prefix, n, volume, pitch)
305-  local name = prefix .. random_int(1, n)
306-  sfx(sounds[name], volumes[name] or volume, pitch)
307-end
308-
309--- Layered pair: two samples stacked at different volumes (the family's
310--- hover/click/crit chords — e.g. dagger_crit1 @0.5 + dagger_crit2 @0.15).
311-function sfx_pair(a, vol_a, b, vol_b, pitch)
312-  sfx(a, vol_a, pitch)
313-  sfx(b, vol_b, pitch)
314-end

The `sfx_any` function selects a sound by concatenating a prefix with a random number between 1 and n, then looks up the volume from a volumes table. I'm verifying that the bare `random_int` call uses the global RNG rather than the grng, which keeps it safe for VFX contexts—this matches how it's already being used in wave_sweep and other recorded events. Now I'm ready to declare the sounds and connect them together around line 786.

I'm adding sound declarations for the wave impacts and setting conservative default volumes: impact sounds at 0.35 since many fire at once, crash sounds at 0.55, and drown sounds at 0.45. These will be tunable through the F7 sound slots so the volumes can be adjusted later. I need to make sure the volumes table has entries for each sound so that `sfx_any` doesn't pass nil to the sfx function.

Wiring the sounds into wave_sweep... I like the per-row gating idea — pawns in the same row share the same arrival delay anyway, so they'd all trigger simultaneously and create that machine-gun stacking. I'll track which rows have already fired their impact sound and only play it once per row, which is a clean refinement that prevents the density issue while keeping the cascading effect intact.…

806:sound_declare('wall_block',  'assets/sounds/wall_block.ogg')
874:volumes.wall_block    = 0.55
3808:  sfx(sounds.wall_block, volumes.wall_block)
3932:    sfx(sounds.wall_block, volumes.wall_block)

916:    timer_after(juice_unscaled_timer, gap*i, function() sfx(sound, vi) end)
1969:  timer_after(juice_unscaled_timer, 1.2, function()
7067:  timer_tween(juice_unscaled_timer, 0.05, 'punch_zoom', main_camera,

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\fx_lab.lua has been updated successfully. (file state is current in your context — no need to Read it back)

fxsmoke: no errors

(Bash completed with no output)

wave_impact1  src[2
 2.012771
 ] ogg[2
 2.012771
 ]
wave_impact2  src[2
 1.994667
 ] ogg[2
 1.994667
 ]
wave_crash1  src[2
 5.200000
 ] ogg[2
 5.200000
 ]
wave_crash2  src[2
 6.279708
 ] ogg[2
 6.279708
 ]
wave_drown1  src[2
 5.269917
 ] ogg[2
 5.269917
 ]
wave_drown4  src[2
 5.917313
 ] ogg[2
 5.917313
 ]

replays: 6/6 passed
replays: 6/6 passed

I need to adjust Chequered Flag's dark-square push to match Wave's behavior—making it push 2 squares instead of 1. There's a note in the Wave code about how a single-square push can get caught in the march-beat cancellation, so I'm aligning the mechanics between the two pieces.…

  item_def{ id = 'chequered_flag', name = 'Chequered Flag', weight = 2, img = flag_img,
            beat_max = 8, tags = { 'tag_parity', 'tag_beat', 'tag_force' },
            desc = 'Every 8 beats the flag waves: pawns on light squares take 1 damage and pawns on dark squares are Pushed back.',
            on = { march_beat = counter_tick },
            on_fire = function(it) flag_wave() end }

  -- A lift is a Push UP, held across beats — and Brick then chips the lifted
  -- pawn on every row it rises, a synergy the keyword found by itself.
  item_def{ id = 'balloon', name = 'Balloon', weight = 2, img = balloon_img,
=== catalog ===
309:- 🏁 **Chequered Flag** [Parity, Beat, Force] — "Every 8 beats the flag waves: pawns on light squares take 1 damage and pawns on dark squares are Pushed back." *(`[f]` retrofit, same collapse as Wave.)*

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\items.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\items_catalog.md has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

      3 SLIDEPROBE n=2 travel=30.0
      2 SLIDEPROBE n=2 travel=60.0
      1 SLIDEPROBE n=1 travel=30.0

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

-- clean --
fxsmoke: no errors
replays: 6/6 passed
replays: 6/6 passed

I found a bug in the flag_wave function where the damage logic is backwards—light squares should take damage but dark squares are getting pushed instead. Looking at the code, it's separating enemy pawns into light and dark square groups, then applying push_damage to the light ones while sorting the dark ones, which is the opposite of what should happen.…

function square_is_light(gx, gy) return (gx + gy)%2 == 0 end

-- Is an item drop sitting on the board right now? (Package.) A SCAN, not a
-- cached count: `damage_vs` must stay pure, a counter that drifts is a desync
-- waiting to happen, and `pawns` is never more than a board's worth.
function drop_on_board()
  for _, p in ipairs(pawns) do if p.item then return true end end
  return false
end

PILLAR_LIFE_PER = 2   -- Pillar: maximum life bought per +1 damage
=== how the board is drawn ===
function draw_board_top()
  for gx = 0, BOARD_SIZE - 1 do
    for gy = 0, BOARD_SIZE - 1 do
      local sx, sy = BOARD_X + gx*SQUARE, BOARD_Y + gy*SQUARE
      local light  = square_is_light(gx, gy)
      layer_rectangle(board_layer, sx, sy, SQUARE, SQUARE,
                      light and board_light() or board_dark())
    end
  end
end

-- Reachable-cell markers (deco layer) — the form's move range as dots. Empty cells
-- are subtle monochrome dots; a cell holding a pawn is green (capture), an item blue.
-- Queen/Rook rays lay a line of dots to the first pawn (green) and no further. The
-- aimed cell reads larger/brighter.
function draw_markers()
  if game_state ~= 'playing' then return end
  -- A held click ("you can't reach that from here") flashes every legal cell for
... [1 more lines]

The `square_is_light` function correctly identifies light squares where the sum of coordinates is even, and `draw_board_top` uses this same logic to render them in cream color while dark squares get gray. So the logic and rendering should match up, yet the user is seeing the opposite colors. I need to check what the actual color values are for `fg` and `gray` to see if there's a mismatch there.

Looking at the palette from the Twemoji/SNKRX theme, `fg` is the foreground color (cream, around RGB 231,232,233) and `gray` is mid-gray, so light squares should indeed appear light. The predicate and drawing both seem correct, so the issue must be elsewhere in the flag wave logic.

Let me trace through the flag_wave function more carefully — it separates pawns into light and dark lists, then applies damage to light squares and push to dark squares. But the user is reporting the opposite behavior, which means either I'm misreading the code or there's something inverted in how the lists are being processed.

I measured a specific board cell earlier and confirmed that square_is_light returns true for what visually appears as a light square, so the function itself seems correct. That means the inversion must be coming from somewhere else in the logic.

Let me think about this differently — when he sees pawns being pushed on white squares, maybe they're actually starting on dark squares, getting pushed an even number of squares vertically, which keeps them on the same color parity. So a pawn pushed from a dark square stays on dark, which wouldn't explain the white square observation.

Actually, I should verify the actual palette values instead of relying on my earlier assumptions about which color is which. Let me recalculate the grid position more carefully from the pixel coordinates.

So fg is confirmed as the light color at (231,232,233). The predicate seems correct then. But there's still this…

function flag_wave()
  local light, dark = {}, {}
  for _, p in ipairs(pawns) do
    if not p.friendly and not p.item then
      if square_is_light(p.gx, p.gy) then light[#light + 1] = p else dark[#dark + 1] = p end
    end
  end
  for _, p in ipairs(light) do push_damage(p, 1, 'chequered_flag') end
  table.sort(dark, function(a, b) return a.gy < b.gy end)
  -- ⛔ TWO SQUARES, for exactly Wave's reason (see wave_sweep). This fires from
  -- the march beat, so at one square the shove put each pawn back on the square
  -- it was already mid-hop toward: the beat netted zero, the slide travelled
  -- zero pixels, and the dark half of this card was invisible. Two nets a full
  -- square of retreat and the pawn is seen making it.
  -- ⚠ NO stagger here, unlike Wave: there is no crest crossing the board to
  -- sequence against, so the flag's half fires as one instant like the damage
  -- half it is paired with.
  for _, p in ipairs(dark) do push_and_resolve(p, 0, -1, 'chequered_flag', nil, FLAG_PUSH) end
  sfx_any('capture_impact', 2)
end

-- 🎈 BALLOON: a lift is a Push UP, held for BALLOON_BEATS beats. The state
-- rides the pawn, so Brick chips it on every row it rises past — a synergy
-- nobody designed, found by the keyword doing its job.
BALLOON_BEATS = 2

The code checks out—light squares trigger damage and dark squares trigger push—and the square color logic matches what's drawn. But there's still a contradiction between what the code should produce and what I'm observing, so my earlier pixel measurements might be off. Rather than re-reading the same code, I should verify against the actual rendered board by checking the PNG screenshot I captured earlier.…

gx gy  parity(gx+gy)%2==0 -> square_is_light   rendered RGB      bright?

0  0   is_light=True             (231, 232, 233)   LIGHT

1  0   is_light=False            (128, 128, 128)   dark

2  0   is_light=True             (231, 232, 233)   LIGHT

3  0   is_light=False            (128, 128, 128)   dark

0  1   is_light=False            (128, 128, 128)   dark

1  1   is_light=True             (231, 232, 233)   LIGHT

2  1   is_light=False            (128, 128, 128)   dark

3  1   is_light=True             (231, 232, 233)   LIGHT

0  2   is_light=True             (231, 232, 233)   LIGHT

1  2   is_light=False            (128, 128, 128)   dark

2  2   is_light=True             (0, 0, 0)   dark

3  2   is_light=False            (128, 128, 128)   dark

0  3   is_light=False            (128, 128, 128)   dark

1  3   is_light=True             (0, 0, 0)   dark

2  3   is_light=False            (128, 128, 128)   dark

3  3   is_light=True             (231, 232, 233)   LIGHT
Shell cwd was reset to E:\a327ex

The user's hypothesis points to the same bug pattern I identified with the march-beat cancellation — `flag_wave` triggers after pawns have already moved to their new logical positions, but the hop animation hasn't caught up yet, so there's a mismatch between where the pawn is drawn and what `square_is_light()` reads based on the updated coordinates.

Now I'm weighing two possible fixes: either delay the flag's appearance to sync with the visual animation landing, or evaluate the parity based on the pawn's pre-march square so the card reads what the player actually sees. The question is which approach aligns with how the card should mechanically behave. So the pawn's logical position is already updated to the new cell when the flag fires, but visually it's still animating back from the old cell — that's the 0.18-second hop. The damage number appears over what looks like a dark square to the player, even though the pawn is logically on a light square taking damage. This mismatch is what creates the backwards feeling, and the fix would be to delay the flag evaluation until after the hop animation completes so the visual and logical states align. The owner's complaint is that the current behavior is backwards — he wants pawns visually on white squares to take damage and those on dark squares to get pushed, but it's doing the opposite. The real question is whether to evaluate the parity based on where the pawn visually sits when the flag fires (its old square) or where it lands after the hop (its new square), since the player probably judges the effect by the settled state they see after the animation completes. The damaged pawn appears over a dark square (its old position) when the damage number spawns, making it look like black squares are taking damage, while pushed pawns visually slide away from light squares, creating the opposite impression. The real issue is that the effect triggers during the visual transition rather than after the pawn settles. Since Wave already rejected delays to keep the timing tight, I should evaluate the flag based on the pawn's starting position instead of where it lands. If I evaluate on the pre-march square, pawns on dark squares get pushed to squares of the same parity (light), which is a bit odd visually but the push effect itself is what matters. Since he's already rejected delayed evaluation and wants the observed behavior to match the code, I should go ahead and implement the pre-march evaluation approach.

The key is figuring out how to access the square color before the march happened — either through stored prev_gx/prev_gy values, or by deriving it from the current position if the pawn moved this turn. Let me check what data's available at march time and find the cleanest way to snapshot the square color before the walk happens.…

4976:    p._pushed = true            -- ⚠ deliberately NOT p.prev_gx/moved_ms (ruling 18):
6169:          p.prev_gx, p.prev_gy, p.moved_ms = p.gx, p.gy, sim_now_ms()
6596:      recent = p.moved_ms and p.moved_ms >= since_ms
6597:               and (p.moved_ms - since_ms) <= STRIKE_GRACE_EARLY*1000
6599:      recent = p.moved_ms and (now - p.moved_ms) <= STRIKE_GRACE_LATE*1000
6601:    if not p.friendly and recent and p.prev_gx == gx and p.prev_gy == gy then
6603:      p.moved_ms = nil

6164           end
6165            else
6166              occ[key(p.gx, p.gy)] = nil
6167              -- rollback-grace stamp, on the SIM ms clock (replay-stable; run_time
6168              -- comparisons can land on different frames live vs playback)
6169              p.prev_gx, p.prev_gy, p.moved_ms = p.gx, p.gy, sim_now_ms()
6170              p.gy = ny
6171              p._moved = true                        -- advanced this beat (marks converge trades)
6172              occ[key(p.gx, ny)] = p
6173              local cx, cy = cell_center(p.gx, p.gy)
6174              start_hop(p, cx, cy, HOP_H, HOP_DUR) -- arc toward the new cell
6175            end
6176          end
6177        end

The march records the pawn's previous position and sets a flag when it moves, so I can use that to determine which square to evaluate for parity in `flag_wave` — the previous coordinates if the pawn advanced this beat, otherwise its current cell. I need to verify whether `_moved` gets reset each beat to know if the pawn actually moved on the current frame.…

4369:  p.picked, p.ally, p._gone, p._moved, p._trade_hop = nil, nil, nil, nil, nil
4769:-- to forget. `b` needs a `_moved` flag set when it advances this beat.
4771:-- ⚠ `always` FORCES the converge, for a caller where `_moved` is not the right
4774:-- not — Coffin rams a pawn into a skull between beats, and `_moved` there
4781:  if not always and not b._moved then return 0 end   -- head-on: they die where they stand
5861:  for _, s in ipairs(skulls) do s._moved = nil; order[#order + 1] = s end
5884:        s._moved = true                         -- mutual_destroy reads this for the converge case
6004:  for _, p in ipairs(pawns) do p._moved = nil; occ[key(p.gx, p.gy)] = p end   -- _moved: advanced THIS beat
6121:            if ally == p and o._moved then           -- converge: the ally still charges in...
6125:            elseif ally == o and o._moved then
6171:          p._moved = true                        -- advanced this beat (marks converge trades)

The `_moved` flag tracks whether a pawn advanced during the current beat, getting reset at the start of each walk and set when the pawn moves. I can use this to create a helper function that returns the previous square if the pawn just moved, otherwise the current square—this gives me the square the pawn is visually standing on from the player's perspective, which I can then use for the classification logic.

But now I'm second-guessing whether this is the right approach. Classifying by the previous square makes the instant the flag fires feel coherent to the player—the pawn is drawn there, the damage appears there. The downside is that 0.18 seconds later the pawn lands on the opposite color, so the effect gets attributed to the wrong square visually. For pushed pawns it's worse: they'd be classified as standing on a dark square but then pushed from their current logical position, landing on light instead.

The alternative would be to delay the entire flag effect by the hop duration so everything settles first—then the pawns are visually on their new squares when the damage and push happen, making it all coherent. But that has its own complications with the push cancellation logic.

He's already expressed a preference against delays and wants things to happen on beat, so I'm leaning toward the prev-square classification despite the residual. Let me think through whether that residual is actually as bad as it seems.

If I classify by the previous square, both the damage and push events read correctly at the moment they happen — the player sees the pawn take damage while on the light square, then sees it slide away from the dark square. The fact that it ends on the opposite color only matters if someone's tracking parity afterward, which they aren't really doing mid-effect. So this approach gives the right read when it counts.

Now I'm wondering if Opal has the same issue, since it's also a light-square effect but triggered on a knight commit rather than a march beat, so the timing is different. Let me check whether Opal's damage calculation goes…

main.lua:260:function square_is_light(gx, gy) return (gx + gy)%2 == 0 end
main.lua:333:  if (stats.damage_light or 0) > 0 and p and p.gx and square_is_light(p.gx, p.gy) then
main.lua:5585:      if square_is_light(p.gx, p.gy) then light[#light + 1] = p else dark[#dark + 1] = p end
main.lua:6802:  if not (p and p.gx and square_is_light(p.gx, p.gy)) then return end
main.lua:6811:  if owned_set['opal'] and p.gx and square_is_light(p.gx, p.gy) then sfx(sounds.opal_light, volumes.opal_light) end
main.lua:9561:      local light  = square_is_light(gx, gy)
items.lua:55:  --   first Parity item; `square_is_light` in main.lua is the shared test.
items.lua:911:  -- the first build and `square_is_light` is the test draw_board already ran.
fx_lab.lua:199:      if parity == 'light' then ok = square_is_light(tx, ty) end
fx_lab.lua:200:      if parity == 'dark' then ok = not square_is_light(tx, ty) end

I'm tracking down where flag_wave gets called — it's the only one running inside a march_beat handler, which is where the bug lives. The other call sites like damage_vs, the VFX/sound effects, and draw_board_top all execute at safe times outside that handler.…

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

FLAGPROBE damage: seen(4,6)=true logical(4,7)=false
FLAGPROBE damage: seen(7,5)=true logical(7,6)=false
FLAGPROBE damage: seen(4,4)=true logical(4,5)=false
FLAGPROBE damage: seen(5,3)=true logical(5,4)=false
FLAGPROBE damage: seen(0,4)=true logical(0,4)=true
FLAGPROBE damage: seen(5,5)=true logical(5,5)=true
FLAGPROBE damage: seen(6,6)=true logical(6,7)=false
FLAGPROBE damage: seen(4,2)=true logical(4,2)=true
FLAGPROBE damage: seen(1,3)=true logical(1,4)=false
FLAGPROBE damage: seen(6,6)=true logical(6,7)=false

The file E:\a327ex\ABAgames\knightvspawns\main.lua has been updated successfully. (file state is current in your context — no need to Read it back)

-- clean --
fxsmoke: no errors
replays: 6/6 passed
replays: 6/6 passed

I'm reviewing how balloons currently work—they're a temporary lift mechanic that pushes a pawn up for a set duration—and now I'm thinking through a new design where balloons spawn every Nth capture and lift a pawn higher.

The balloon would visually attach to the pawn with a physically simulated cord, carrying it upward to row 1 before popping and placing it there. I need to edit the balloon emoji to remove its existing cord and draw my own rope simulation instead. The core tension is deciding whether the pawn moves continuously off-grid during the lift or stays grid-locked, and how to handle the pawn being mid-flight when a march beat occurs—it shouldn't march while airborne.

The cleanest approach matches the codebase's pattern: resolve the pawn's position to row 1 instantly in the simulation, then lock it from marching during the multi-second flight animation so the visual catch-up doesn't desync with the game state.

Now I'm thinking through the cord physics for the balloon itself — modeling it as a verlet chain anchored at the balloon's position.

For the asset, I should create a separate `balloon_body.png` without the cord for the in-world visual, while keeping the original full emoji for the item card icon.

Now I'm thinking through the interaction changes: replacing `BALLOON_BEATS`, `balloon_lift`, `balloons_tick`, and `p.balloon`. The bigger issue is that the new carry mechanic removes the Push keyword entirely, which breaks the existing Force synergies with Brick, Dizzy, Locomotive, and Curling Stone — that's a significant design consequence I need to flag, since the `tag_force` tag would no longer apply.

I'm wondering if the lift could still count as a Push per row travelled to preserve those synergies, though a smooth carry doesn't have discrete "rows entered" the same way. This is a design decision that needs input first.

I'm also checking the current balloon config — it's set to trigger every 3rd capture with a spread of 4 — and I need to clarify which pawn gets lifted. Given the scope here, I should write up a design brief and wait before proceeding, since this involves a new entity, rope simulation, asset edits, and sim-state changes.

Let me first examine the balloon item definition, where it's being called, how other summons like the cat and tornado are structured, and the balloon asset itself. Then I'll write the brief with the key open questions: whether the lift is a Push or carry, whether placement happens instantly at row 1 with a lock or steps with the beat, how long the flight lasts, what happens if row 1 is occupied, and what happens if the pawn dies mid-flight.

  item_def{ id = 'balloon', name = 'Balloon', weight = 2, img = balloon_img,
            count_max = 3, tags = { 'tag_ranged', 'tag_tempo', 'tag_force' },
            desc = 'Every 3rd capture, a balloon lifts the lowest pawn, Pushing it up on each beat for 2 beats.',
            on = { capture = counter_tick },
            on_fire = function(it) balloon_lift(lowest_pawn()) end }

  -- The owner's founding observation for the whole archetype: the bat is
  -- Banana Peel's rule performed unconditionally by a cat.
  item_def{ id = 'cat', name = 'Cat', weight = 2, img = cat_img, beat_max = 12,
            tags = { 'tag_summon', 'tag_force' },
            desc = 'Summon a cat. Every 12 beats it pounces the pawn nearest a side edge and Pushes it off the board, capturing it.',
=== call site ===
5622:-- 🎈 BALLOON: a lift is a Push UP, held for BALLOON_BEATS beats. The state
5625:BALLOON_BEATS = 2
5626:function balloon_lift(p)
5628:  p.balloon = BALLOON_BEATS
5634:function balloons_tick()
5637:    if (p.balloon or 0) > 0 and not p._gone then lifted[#lifted + 1] = p end
5641:    p.balloon = p.balloon - 1
6274:    balloons_tick()                                    -- 🎈 the lift, one row per beat
=== catalog ===
356:- 🎈 **Balloon** [Ranged, Tempo, Force] — "Every 3rd capture, a balloon lifts the lowest pawn, Pushing it up on each beat for 2 beats." *(`[f]` retrofit — a lift is a Push up, and Brick now chips the lifted pawn on every row, a found synergy.)*

size (512, 512)

y=   0  x  256.. 284  width   29

y=  16  x  205.. 334  width  130

y=  32  x  183.. 357  width  175

y=  48  x  168.. 372  width  205

y=  64  x  157.. 382  width  226

y=  80  x  150.. 389  width  240

y=  96  x  145.. 394  width  250

y= 112  x  143.. 397  width  255

y= 128  x  142.. 398  width  257

y= 144  x  143.. 396  width  254

y= 160  x  146.. 393  width  248

y= 176  x  152.. 388  width  237

y= 192  x  159.. 381  width  223

y= 208  x  168.. 372  width  205

y= 224  x  178.. 361  width  184

y= 240  x  191.. 348  width  158

y= 256  x  206.. 334  width  129

y= 272  x  223.. 317  width   95

y= 288  x  245.. 295  width   51

y= 304  x  243.. 297  width   55

y= 320  x  245.. 295  width   51

y= 336  x  238.. 302  width   65

y= 352  x  244.. 296  width   53

y= 368  x  261.. 291  width   31

y= 384  x  266.. 297  width   32

y= 400  x  274.. 309  width   36

y= 416  x  285.. 342  width   58

y= 432  x  304.. 370  width   67

y= 448  x  343.. 387  width   45

... [3 more lines]

I'm pinpointing where the balloon body ends and the cord begins by examining the width and position data across different y-coordinates—the knot narrows significantly around y=352-368, and then the cord continues as a thin curved line extending downward to the right.

y= 340  x  237.. 302  w  66  centre  269.5

y= 344  x  238.. 302  w  65  centre  270.0

y= 348  x  240.. 300  w  61  centre  270.0

y= 352  x  244.. 296  w  53  centre  270.0

y= 356  x  259.. 287  w  29  centre  273.0

y= 360  x  259.. 288  w  30  centre  273.5

y= 364  x  260.. 289  w  30  centre  274.5

y= 368  x  261.. 291  w  31  centre  276.0

y= 372  x  262.. 292  w  31  centre  277.0

y= 376  x  264.. 293  w  30  centre  278.5

y= 380  x  265.. 295  w  31  centre  280.0

y= 384  x  266.. 297  w  32  centre  281.5

y= 388  x  268.. 299  w  32  centre  283.5

y= 392  x  270.. 302  w  33  centre  286.0

y= 396  x  272.. 305  w  34  centre  288.5

y= 400  x  274.. 309  w  36  centre  291.5

y= 404  x  276.. 313  w  38  centre  294.5

y= 408  x  279.. 319  w  41  centre  299.0

y= 412  x  281.. 329  w  49  centre  305.0

y= 416  x  285.. 342  w  58  centre  313.5

y= 420  x  288.. 351  w  64  centre  319.5

y= 424  x  293.. 359  w  67  centre  326.0

y= 428  x  298.. 365  w  68  centre  331.5

There's a sharp transition around y=354 where the balloon body ends and the cord begins—the width drops significantly and the center starts shifting rightward. I'll crop the image at that boundary, removing everything from y=354 onward to isolate just the balloon body and knot.

The knot sits at approximately y=353 with its center at x=270, so the cord should attach at normalized coordinates (0.527, 0.690) in the 512px asset. Now I'm laying out the full brief with the architectural approach, the sim/show split, the verlet rope system, and the asset specifications.

There are a few key decisions to nail down: whether the lift remains tagged as a Force (which lets Brick and Dizzy interact with it as they currently do) or becomes a pure carry mechanic; what happens if the destination row is occupied; and whether the carried pawn stays locked in place during flight or continues marching.

For the remaining open questions — the balloon pops if the pawn dies mid-flight, it doesn't block anything or get hit itself, and the counter fires every 3rd capture with stacking support. The tricky part is the sim/show split: the pawn moves to row 1 immediately in the simulation and claims that occupancy, but visually it stays at the old cell for several seconds while other pawns march around it.

The real issue is that a knight could target row 1 where the pawn isn't visually present yet, violating the claim rule. So instead of leaving the pawn's old cell empty, I should mark it as airborne or carried — keep it in the pawn list but flag it so it can't be aimed at and doesn't block movement.

Better yet: tie the flight to the beat system. The pawn stays at its origin cell in the simulation during the flight (matching what's visually happening), and once the flight completes after K beats, it gets placed at row 1. This keeps everything deterministic and synced between the visual animation and the game state. The pawn needs to be genuinely off the board while airborne—excluded from occupancy checks, targeting, and the march logic—so nothing can interact with it until it lands. This means touching several systems: the occupancy predicates, collision detection, the march's occupancy table, and targeting rules. It's a fairly invasive change across the codebase.

Rather than build this out speculatively, I should write up a brief laying out the core architecture question: how "real" should the pawn be while in flight? There are three main approaches—instant simulation with delayed visuals, keeping the pawn at its origin until the final beat, or something in between—each with different tradeoffs around whether the knight can target a pawn that looks like it's somewhere else.

Actually, I notice the knight already has an `airborne` flag that excludes it from occupancy checks, so the codebase already treats airborne-means-not-there as a pattern. That's a strong signal for the third option and gives me precedent to cite. Let me draft the brief now, keeping it focused enough to end with clear questions.