Anchor Interview

1→# Anchor Implementation Plan
     2→
     3→C-first approach with YueScript as the scripting layer. Minimize plain Lua; write game-facing code in YueScript from the start.
     4→
     5→---
     6→
     7→## Build Strategy
     8→
     9→### YueScript Compilation
    10→
    11→**Decision: Build-time compilation**
    12→
    13→Compile `.yue` → `.lua` during build, not at runtime. This:
    14→- Eliminates runtime dependency on YueScript compiler
    15→- Produces debuggable `.lua` files for error inspection
    16→- Simplifies the C side (just loads standard Lua)
    17→- Can add runtime compilation later for hot reloading
    18→
    19→**Build flow:**
    20→```
    21→game.yue ──► yue -r ──► game.lua ──► embedded in executable / loaded at runtime
    22→                ↑
    23→                └── -r flag preserves line numbers for debugging
    24→```
    25→
    26→**Directory structure:**
    27→```
    28→anchor/
    29→├── src/                    # C source
    30→├── yue/                    # YueScript engine code (compiled to lua/)
... [476 more lines]

1→# Anchor Engine Specification
     2→
     3→*Anchor is a 2D game engine built around locality of behavior and minimal cognitive overhead. Code that belongs together stays together.*
     4→
     5→---
     6→
     7→## Table of Contents
     8→
     9→1. [Core Philosophy](#core-philosophy)
    10→2. [The Object Tree](#the-object-tree)
    11→3. [Lifecycle](#lifecycle)
    12→4. [Colliders, Springs, and Timers](#colliders-springs-and-timers)
    13→5. [Locality of Behavior](#locality-of-behavior)
    14→6. [Drawing](#drawing)
    15→7. [Lua Syntax Features](#lua-syntax-features)
    16→8. [YueScript Alternative](#yuescript-alternative)
    17→9. [YueScript Class System Integration](#yuescript-class-system-integration)
    18→10. [Technology Stack](#technology-stack)
    19→11. [Engine Services (C Side)](#engine-services-c-side)
    20→12. [Rendering Architecture](#rendering-architecture)
    21→13. [Software Renderer Implementation](#software-renderer-implementation)
    22→14. [Error Handling](#error-handling)
    23→15. [Resolution and Scaling](#resolution-and-scaling)
    24→16. [Build System](#build-system)
    25→17. [File Structure](#file-structure)
    26→18. [Performance Path](#performance-path)
    27→19. [Migration Path](#migration-path)
    28→20. [Deferred Features](#deferred-features)
    29→
    30→---
... [1626 more lines]

The user doesn't want to proceed with this tool use. The tool use was rejected (eg. if it was a file edit, the new_string was NOT written to the file). STOP what you are doing and wait for the user to tell you how to proceed.

User has answered your questions: "What are your motivations for considering the software renderer? Select all that apply."="Aesthetic, Simplicity, Web reliability", "For post-processing effects (outline, tint, brightness, blur, etc.), what's your actual usage pattern? (Single choice)"="Outline + tint only", "For physics in your ball combat games, what collision model do you need? (Single choice)"="True ball-to-ball", "Save/load and persistence aren't mentioned. How do you want to handle this? (Single choice)"="Not a priority". You can now continue with the user's answers in mind.

User has answered your questions: "The discrete rotation angles (32 precomputed rotations = 11.25° steps) create a specific chunky look. Is this a deliberate aesthetic choice you want, or just an acceptable tradeoff? With OpenGL you could do smooth rotations with nearest-neighbor filtering for the chunky pixel look without the angle stepping."="Acceptable tradeoff", "For true ball-to-ball physics, roughly how many simultaneous physics bodies do you expect in your most intensive scenarios?"="Varies wildly", "Sprite animation (frame-by-frame) isn't mentioned in the plan. How do you typically handle animated sprites?"="Minimal animation", "Additive blending (for glows, explosions, laser beams) is common in action games. Do you need it?"="Yes, essential". You can now continue with the user's answers in mind.

User has answered your questions: "Given that discrete rotations aren't desired and additive blending is essential, what's your actual concern with OpenGL? Is it shader programming specifically, GPU state management, driver compatibility, or something else?"="Shaders are complex, WebGL uncertainty", "Beyond Windows and Web, do you have any other platform targets? This affects technology choices significantly."="Mobile someday, Linux eventually, Consoles as well, eventually", "For the 'varies wildly' physics scenario - in your most chaotic game idea, what's happening? This helps scope performance requirements."="All of the above", "Camera effects (shake, zoom, lerp to target) - where should these live?"="Pure YueScript". You can now continue with the user's answers in mind.

User has answered your questions: "Console targets change everything. Were you aware that software rendering is essentially incompatible with console development? Consoles require GPU APIs (DirectX on Xbox, GNM on PlayStation, NVN/Vulkan on Switch)."="This is new information that changes my thinking, but also consoles are only a goal if a game is very successful. In that case, taking the time to also use GPU APIs would be worth it and it wouldn't bother me. In that case, I'd have both software renderer and GPU going on. But then whatever we make use of in the software renderer that can't be easily translated to the traditional GPU APIs (which is one of the reasons why we'd be using such a renderer in the first place) would be hard to do... So I don't know yet.", "For shader complexity concerns: LÖVE (which you used before) hides shaders behind a simple API but uses OpenGL underneath. Would a similar thin abstraction satisfy you? You'd write `layer:circle()` not `glDrawArrays`."="Yes, such abstraction works, but the underlying code still needs to be written by me (or you). Even then, controlling pixels individually with the software renderer is much more freeing than being bound by shaders, which make such control a lot harder. The ability to do effects while having complete control over individual pixels feels much more intuitive to me than writing effects using shaders.", "For WebGL uncertainty: modern WebGL 1.0 is very stable across browsers (Chrome, Firefox, Safari, Edge). WebGL 2.0 has some Safari quirks but WebGL 1.0 is solid. Does knowing this change your concern level?"="I understand that I can have my code working across pretty much most browsers depending on how I choose to do it, so it wasn't a big concern.", "Local multiplayer (same screen, multiple controllers) - is this ever a goal?"="Online only". You can now continue with the user's answers in mind.

User has answered your questions: "Can you describe 1-2 specific visual effects where pixel-level control feels essential? I want to understand concrete examples, not abstract preferences. What effect would be hard to achieve with shaders?"="A simple example is pixel sorting. But there are also... perhaps creative concerns. Imagine a game like Noita, where each pixel is simulated, I feel like that would be easier to render if each pixel is also controllable visually, no? I feel like the space of ideas for what I can do visually is higher than if I'm constrained by shaders. But I must admit that I don't have a great number of concrete examples of how that would come about.", "Have you tested software rendering performance at your target scale? 480×270 with 200+ sprites, each with alpha blending, at 60fps?"="No, assuming", "A hybrid approach: GPU renders sprites/shapes to a texture, then you read it back and manipulate pixels in software for effects, then upload. This gives pixel control for effects while GPU does heavy lifting. Interest level?"="Need details", "Online multiplayer was mentioned. Is this something the engine should support, or would you use a separate networking library/service?"="Too early". You can now continue with the user's answers in mind.

User has answered your questions: "Is your next game idea more like SNKRX/BYTEPATH (circles, physics, shapes) or more like Noita (per-pixel simulation, falling sand)? This fundamentally affects renderer requirements."="Ball combat style", "Would you be willing to build a small performance test before committing to software rendering? Render 300 alpha-blended sprites at 480×270, measure fps on a weak laptop. This would validate the assumption."="Have backup plan", "Text effects (wavy text, per-character color, bounce-in letters) - these are mentioned in ANCHOR.md as YueScript-side. How complex do your text effects typically get?"="I have already built a complex text effect system in LOVE where actions can be applied to each character arbitrarily and you can do any text effect like that. So I'd build something similar, but improve it, the API for the old one was a bit too complicated and didn't cover a few important cases.", "The plan says 'emojis are drawn as images, not text.' Does this mean you use emoji sprites heavily as game graphics?"="Yes, I literally take PNGs from Emojipedia or whatever and use the literal emojis in the final game.". You can now continue with the user's answers in mind.

User has answered your questions: "The plan uses SDL_mixer for audio. SDL_mixer is simple but limited (no pitch shifting, no real-time effects). Is this sufficient, or do you need more advanced audio?"="I need pitch shift immediately, and eventually more advanced effects, I'm also learning how to produce music this year and I'll probably play around with those in my games at some point.", "Debug workflow: when something breaks, how do you typically debug? The plan has 'error screen with stacktrace' but no console, inspector, or hot reload."="Error screen enough, Print debugging", "Resolution: 480×270 vs 640×360 - what determines this choice? Is it per-game or engine-wide?"="Per-game choice", "Window management: fullscreen toggle, resolution changes, borderless window. How important are these?"="Essential". You can now continue with the user's answers in mind.

User has answered your questions: "For audio with pitch shifting, which approach appeals to you?"="Research more", "Box2D version: the plan specifies 3.1. Box2D 3.x is a major rewrite from 2.x with a different API. Have you used Box2D 3.x specifically, or is this based on research?"="Used 3.x", "Physics timestep: fixed timestep (deterministic, good for replays) vs variable timestep (simpler). The plan mentions fixed timestep at 60fps. Is determinism/replay important to you?"="Fixed, determinism matters", "Build system: 'no CMake, simple build scripts' is stated. For web builds (Emscripten), have you done this before? Emscripten has quirks."="Research-based". You can now continue with the user's answers in mind.

User has answered your questions: "Particle systems: the object tree can handle particles (each particle is an object), but this might be slow for thousands of particles. Do you need high particle counts, or are particles sparse?"="Depends on game", "UI/menus: how do you typically build game UI? The plan doesn't mention UI systems."="I have a layout system already coded, it's fairly simple, but it works. Other than that I just generally code things manually. Eventually I might want to create a proper UI system, but it's one of the hardest problems to get right and I don't want to mess up. Especially because I also want to use this engine to render my entire website eventually.", "Asset loading: 'load directly from disk' is stated. For web, assets need to be preloaded or fetched. How should this work?"="Preload all", "Shader effects (if we do use OpenGL eventually): would you want to write custom shaders, or only use built-in effects?"="Custom from start". You can now continue with the user's answers in mind.

User has answered your questions: "The 'render my website with this engine' goal is significant. Is this a near-term goal (build website tooling alongside games) or a distant aspiration?"="Distant goal", "For website rendering, what's the vision? A blog? Interactive visualizations? A full web app?"="The full idea is a series of 7 stories that are also 7 games, and for some of the games the stories may be presented with merged game elements, therefore requiring full control over the screen in specific ways that are hard/impossible to do in traditional HTML.", "You mentioned wanting custom shaders 'from start' if using OpenGL. This contradicts 'shaders are complex' - are you willing to learn GLSL if needed, or do you want an abstraction that compiles to GLSL?"="I already know some basic GLSL and have written shaders that are 500+ lines long. I just really don't like it and it's not intuitive to me. But with your help I guess I could do it.", "Final big-picture question: what's the primary goal of building this engine? Learning C? Having full control? Specific features LÖVE lacks? Artistic vision?"="Full control, Features". You can now continue with the user's answers in mind.

User has answered your questions: "Threading: should the engine be single-threaded (simpler) or have audio/physics on separate threads (better performance, more complex)?"="This is a detail that I'd hope you'd solve, I don't know enough about this to tell.", "Memory/resource management: when sprites/sounds/fonts are loaded, do they stay forever (simple) or need explicit unloading (more control)?"="Live forever", "C code style: do you have a preference for how C code is structured? (single-file vs many files, naming conventions, etc.)"="Single anchor.c", "Distribution: when shipping a game, how should it be packaged?"="Single executable". You can now continue with the user's answers in mind.

User has answered your questions: "For the renderer decision: given everything discussed, should I write the plan with (a) software renderer as primary with GPU backup documented, (b) GPU/OpenGL as primary with software as optional, or (c) both paths detailed equally for you to choose during implementation?"="I'd prefer to have an actual discussion with you before you write the new implementation plan. Depending on how the discussion goes I'll decide it right now. I'm still undecided.", "The current plan has phases 1-7. Should the new plan keep this structure, or would you prefer a different organization (e.g., by feature area, by milestone, shorter/longer phases)?"="Your call", "How detailed should the implementation plan be? The current plan has API examples but not full C code structure."="Light C details", "Should the new plan explicitly address the 'console port requires renderer rewrite' scenario, or leave that as an implicit future problem?"="Omit". You can now continue with the user's answers in mind.

File created successfully at: /home/adn/a327ex/Anchor/docs/ANCHOR_IMPLEMENTATION_PLAN.md

docs/ANCHOR.md:21:13. [Software Renderer Implementation](#software-renderer-implementation)
docs/ANCHOR.md:1368:### Software Renderer
docs/ANCHOR.md:1370:Anchor uses a CPU-based software renderer targeting 480×270 or 640×360 resolution (depending on game). This approach provides direct pixel manipulation, simpler debugging, and consistent behavior across platforms.
docs/ANCHOR.md:1374:Each layer is a framebuffer. Draw commands are batched per layer and flushed at end of frame:
docs/ANCHOR.md:1414:## Software Renderer Implementation
docs/ANCHOR.md:1416:This section provides detailed C implementation guidance for the software renderer.
docs/ANCHOR.md:1465:1. Clear all layer framebuffers
docs/ANCHOR.md:1467:       framebuffer_clear(layer->fb, 0x00000000)  // transparent black
docs/ANCHOR.md:1473:3. Flush all layers (process commands, draw to framebuffers)
docs/ANCHOR.md:1544:        s->rotations[i] = rotate_framebuffer(source, angle);
docs/ANCHOR_IMPLEMENTATION_PLAN.md:151:- [ ] Create render target framebuffer (480×270 or configurable)
docs/ANCHOR_IMPLEMENTATION_PLAN.md:182:- [ ] Each layer is a framebuffer

.claude/CLAUDE.md:27:- Update `docs/IMPLEMENTATION_PLAN.md` when tasks are completed
.claude/CLAUDE.md:133:**Anchor** — a game engine being rewritten from Lua/LÖVE to C/Lua with SDL2, software rendering, and Box2D.

1360→layer:draw_text('HP: 3', 'default', x, y)
  1361→layer:draw_text('99', 'large', x, y, r, sx, sy)  -- with optional transform
  1362→```
  1363→
  1364→---
  1365→
  1366→## Rendering Architecture
  1367→
  1368→### Software Renderer
  1369→
  1370→Anchor uses a CPU-based software renderer targeting 480×270 or 640×360 resolution (depending on game). This approach provides direct pixel manipulation, simpler debugging, and consistent behavior across platforms.
  1371→
  1372→### Layers = Framebuffers
  1373→
  1374→Each layer is a framebuffer. Draw commands are batched per layer and flushed at end of frame:
  1375→
  1376→1. Lua calls `layer:circle()`, `layer:draw_image()`, etc.
  1377→2. Each call appends to that layer's command buffer
  1378→3. At end of frame, C processes all commands in a tight loop
  1379→4. Effects are applied per-layer (C functions, configured from Lua)
  1380→5. Layers composite to screen via alpha blending
  1381→
  1382→### Sprites
  1383→
  1384→Sprites use precomputed rotations (16 or 32 angles) with runtime scaling. This trades memory for computation and creates a distinctive aesthetic with discrete rotation angles.
  1385→
  1386→### Effects
  1387→
  1388→Post-processing effects are implemented in C and configured from Lua:
  1389→
... [180 more lines]

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    17→9. [YueScript Class System Integration](#yuescript-class-system-integration)
    18→10. [Technology Stack](#technology-stack)
    19→11. [Engine Services (C Side)](#engine-services-c-side)
    20→12. [Rendering Architecture](#rendering-architecture)
    21→13. [OpenGL Implementation Notes](#opengl-implementation-notes)
    22→14. [Error Handling](#error-handling)
    23→15. [Resolution and Scaling](#resolution-and-scaling)
    24→16. [Build System](#build-system)
    25→17. [File Structure](#file-structure)

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1362→```
  1363→
  1364→---
  1365→
  1366→## Rendering Architecture
  1367→
  1368→### OpenGL Renderer
  1369→
  1370→Anchor uses OpenGL 3.3 Core Profile for rendering, targeting 480×270 or 640×360 base resolution (per-game configurable). The low resolution is rendered to a framebuffer texture, then integer-scaled to the window with nearest-neighbor filtering for crisp pixels.
  1371→
  1372→### Layers
  1373→
  1374→Each layer is a framebuffer texture. Draw commands are batched per layer:
  1375→
  1376→1. Lua calls `layer:circle()`, `layer:draw_image()`, etc.
  1377→2. Geometry is batched into vertex buffers
  1378→3. At end of frame, layers are rendered via draw calls
  1379→4. Post-processing shaders are applied per-layer
  1380→5. Layers composite to screen in defined order
  1381→
  1382→### Sprites
  1383→
  1384→Sprites are rendered as textured quads with smooth rotation (handled by the GPU). No precomputed rotation frames needed.
  1385→
  1386→### Blend Modes
  1387→
  1388→Two blend modes available per draw call:
  1389→- **Alpha blending** (default): standard transparency
  1390→- **Additive blending**: for glows, explosions, energy effects
... [35 more lines]

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1421→Draw order within a layer is submission order (when Lua calls draw functions), not tree order.
  1422→
  1423→---
  1424→
  1425→## OpenGL Implementation Notes
  1426→
  1427→This section provides guidance for the OpenGL renderer implementation.
  1428→
  1429→### Core Concepts
  1430→
  1431→**Framebuffer Objects (FBOs):** Each layer renders to an FBO at the game's base resolution (e.g., 480×270). This allows post-processing and composition.
  1432→
  1433→**Batch Rendering:** Geometry is accumulated into vertex buffers and drawn in batches to minimize draw calls. Batch breaks occur on texture/shader/blend mode changes.
  1434→
  1435→**Shaders:** A small set of shaders handles all rendering:
  1436→- Sprite shader (textured quads with transform)
  1437→- Shape shader (circles, rectangles, lines)
  1438→- Post-process shaders (outline, tint, brightness, custom)
  1439→
  1440→### Frame Flow
  1441→
  1442→```
  1443→1. For each layer:
  1444→   - Bind layer's FBO
  1445→   - Clear to transparent
  1446→   - Batch and draw all geometry
  1447→   - Apply post-process shader if configured
  1448→
  1449→2. Bind screen framebuffer
... [38 more lines]

18:10. [Technology Stack](#technology-stack)
1244:## Technology Stack

1240→```
  1241→
  1242→---
  1243→
  1244→## Technology Stack
  1245→
  1246→- **Language:** C99 with Lua 5.4 scripting (YueScript compiled to Lua)
  1247→- **Window/Input/Audio:** SDL2, SDL_mixer
  1248→- **Graphics:** Software renderer (CPU-based, 480×270 or 640×360 target resolution)
  1249→- **Physics:** Box2D 3.1
  1250→- **Platforms:** Windows (primary), Web (Emscripten)
  1251→
  1252→---
  1253→
  1254→## Engine Services (C Side)
  1255→
  1256→### Physics
  1257→
  1258→Box2D 3.1 provides two types of shape interactions:
  1259→

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1240→```
  1241→
  1242→---
  1243→
  1244→## Technology Stack
  1245→
  1246→- **Language:** C99 with Lua 5.4 scripting (YueScript compiled to Lua)
  1247→- **Window/Input:** SDL2
  1248→- **Audio:** TBD (miniaudio or SoLoud — needs pitch shifting support)
  1249→- **Graphics:** OpenGL 3.3 Core Profile (WebGL 2.0 compatible)
  1250→- **Physics:** Box2D 3.1
  1251→- **Platforms:** Windows (primary), Web (Emscripten), Linux (eventually)
  1252→
  1253→---
  1254→
  1255→## Engine Services (C Side)

The file /home/adn/a327ex/Anchor/.claude/CLAUDE.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    23→### During Session
    24→
    25→- Work normally on requested tasks
    26→- Update `docs/ANCHOR.md` when APIs or architecture changes
    27→- Update `docs/ANCHOR_IMPLEMENTATION_PLAN.md` when tasks are completed
    28→- Update this file (`CLAUDE.md`) when new patterns or conventions are established
    29→
    30→### End of Session
    31→

The file /home/adn/a327ex/Anchor/.claude/CLAUDE.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   129→---
   130→
   131→## The Project
   132→
   133→**Anchor** — a game engine being rewritten from Lua/LÖVE to C/Lua with SDL2, OpenGL, and Box2D.
   134→
   135→---
   136→
   137→## Working Style

.claude/CLAUDE.md:27:- Update `docs/ANCHOR_IMPLEMENTATION_PLAN.md` when tasks are completed
docs/ANCHOR.md:1557:2. **Rendering:** Software renderer, layers, command buffers, sprites with precomputed rotations
website/context/ANCHOR.md:21:13. [Software Renderer Implementation](#software-renderer-implementation)
website/context/ANCHOR.md:1248:- **Graphics:** Software renderer (CPU-based, 480×270 or 640×360 target resolution)
website/context/ANCHOR.md:1368:### Software Renderer
website/context/ANCHOR.md:1370:Anchor uses a CPU-based software renderer targeting 480×270 or 640×360 resolution (depending on game). This approach provides direct pixel manipulation, simpler debugging, and consistent behavior across platforms.
website/context/ANCHOR.md:1414:## Software Renderer Implementation
website/context/ANCHOR.md:1416:This section provides detailed C implementation guidance for the software renderer.
website/context/ANCHOR.md:1631:2. **Rendering:** Software renderer, layers, command buffers, sprites with precomputed rotations
website/context/IMPLEMENTATION_PLAN.md:97:**Goal:** Draw shapes and sprites to screen with layers using software rendering.
website/context/IMPLEMENTATION_PLAN.md:445:| 2 | Rendering | Software renderer, shapes, sprites, layers, effects (outline, tint, brightness) |
website/context/CLAUDE.md:27:- Update `docs/IMPLEMENTATION_PLAN.md` when tasks are completed
website/context/CLAUDE.md:133:**Anchor** — a game engine being rewritten from Lua/LÖVE to C/Lua with SDL2, software rendering, and Box2D.
website/files/Opus 4.5/ANCHOR.md:21:13. [Software Renderer Implementation](#software-renderer-implementation)
website/files/Opus 4.5/ANCHOR.md:1248:- **Graphics:** Software renderer (CPU-based, 480×270 or 640×360 target resolution)
website/files/Opus 4.5/ANCHOR.md:1368:### Software Renderer
website/files/Opus 4.5/ANCHOR.md:1370:Anchor uses a CPU-based software renderer targeting 480×270 or 640×360 resolution (depending on game). This approach provides direct pixel manipulation, simpler debugging, and consistent behavior across platforms.
website/files/Opus 4.5/ANCHOR.md:1414:## Software Renderer Implementation
website/files/Opus 4.5/ANCHOR.md:1416:This section provides detailed C implementation guidance for the software renderer.
website/files/Opus 4.5/ANCHOR.md:1631:2. **Rendering:** Software renderer, layers, command buffers, sprites with precomputed rotations
website/files/Opus 4.5/CLAUDE.md:23:**Anchor** — the engine. Being rewritten from Lua/LÖVE to C/Lua with SDL2, software rendering, and Box2D.
website/files/Opus 4.5/IMPLEMENTATION_PLAN.md:99:**Goal:** Draw shapes and sprites to screen with layers using software rendering.
website/files/Opus 4.5/IMPLEMENTATION_PLAN.md:663:| 2 | Rendering | Software renderer, shapes, sprites, layers, effects (outline, tint, brightness) |
website/logs/2026-01-01_07-37.md:32:- `docs/` folder for ANCHOR.md, IMPLEMENTATION_PLAN.md
website/logs/2026-01-01_07-37.md:2270:-rw-r--r-- 1 adn adn 23152 Dec 28 17:05 IMPLEMENTATION_PLAN.md
website/logs/2026-01-01_07-37.md:2292:├── IMPLEMENTATION_PLAN.md (23KB)
website/logs/2026-01-01_07-37.md:2305:⏺ Read (/home/adn/a327ex/IMPLEMENTATION_PLAN.md)  
website/logs/2026-01-01_07-37.md:2331:    23→**Anchor** — the engine. Being rewritten from Lua/LÖVE to C/Lua with SDL2, software rendering, and Box2D.
website/logs/2026-01-01_07-37.md:2401:    21→13. [Software Renderer Implementation](#software-renderer-implementation)
website/logs/2026-01-01_07-37.md:2534:- **C backend**: SDL2 for window/input/audio, software rendering, Box2D 3.1 for physics
... [128 more lines]

1550→The tree stays in Lua. Only inner loops move to C based on profiling data.
  1551→
  1552→---
  1553→
  1554→## Migration Path
  1555→
  1556→1. **Skeleton:** C main loop, SDL2 window, Lua init
  1557→2. **Rendering:** Software renderer, layers, command buffers, sprites with precomputed rotations
  1558→3. **Input:** SDL2 input with binding system
  1559→4. **Audio:** SDL_mixer sound and music
  1560→5. **Physics:** Box2D 3.1 wrapper with sensor/contact events and queries
  1561→6. **Random:** Deterministic PRNG
  1562→7. **Text:** TTF font loading and rendering
  1563→8. **Object system:** Tree with immediate kill propagation (YueScript)
  1564→9. **Timer/Spring/Collider:** As child objects
  1565→10. **Error handling:** Protected calls, error screen
  1566→
  1567→Each step testable independently.
  1568→
  1569→---

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1550→The tree stays in Lua. Only inner loops move to C based on profiling data.
  1551→
  1552→---
  1553→
  1554→## Migration Path
  1555→
  1556→1. **Skeleton:** C main loop, SDL2 window, OpenGL context, Lua init
  1557→2. **Web Build:** Emscripten/WebGL parity
  1558→3. **Rendering:** OpenGL batched renderer, layers, sprites, blend modes
  1559→4. **Effects:** Post-processing shaders (outline, tint, custom)
  1560→5. **Input:** SDL2 input with binding system
  1561→6. **Audio:** Sound and music with pitch shifting
  1562→7. **Physics:** Box2D 3.1 wrapper with sensor/contact events and queries
  1563→8. **Random:** Deterministic PRNG
  1564→9. **Text:** TTF font loading and glyph rendering
  1565→10. **Object system:** Tree with immediate kill propagation (YueScript)
  1566→11. **Timer/Spring/Collider:** As child objects
  1567→12. **Error handling:** Protected calls, error screen
  1568→
  1569→Each step testable independently.
  1570→
  1571→---
  1572→
  1573→## Deferred Features

1254→
  1255→## Engine Services (C Side)
  1256→
  1257→### Physics
  1258→
  1259→Box2D 3.1 provides two types of shape interactions:
  1260→
  1261→**Sensors** (overlap detection, no physics response):
  1262→- Objects pass through each other
  1263→- Used for triggers, detection zones, pickups
  1264→
  1265→**Contacts** (physical collision with response):
  1266→- Objects bounce off each other
  1267→- Used for walls, projectiles, physical interactions
  1268→
  1269→```lua
  1270→an:physics_set_gravity(0, 500)
  1271→
  1272→-- Configure collision categories
  1273→an:physics_enable_sensor_between('player', {'pickup', 'trigger_zone'})
  1274→an:physics_enable_contact_between('ball', {'wall', 'paddle'})
  1275→
  1276→-- Per-frame event queries
  1277→for _, event in ipairs(an:physics_get_sensor_enter('player', 'pickup')) do
  1278→    local player, pickup = event.a, event.b
  1279→    pickup:collect()
  1280→end
  1281→
  1282→for _, event in ipairs(an:physics_get_contact_enter('ball', 'wall')) do
  1283→    local ball, wall = event.a, event.b
... [80 more lines]

200→game:set_blend_mode('additive')
   201→game:set_blend_mode('alpha')
   202→```
   203→
   204→**Deliverable:** Shape and sprite rendering with transforms, layers, and blend modes.
   205→
   206→---
   207→
   208→## Phase 4: Effects (Shaders)
   209→
   210→**Goal:** Post-processing effects on layers via fragment shaders.
   211→
   212→### 4.1 Effect Shader Framework
   213→- [ ] Post-process shader pipeline (render layer to texture, apply shader, output)
   214→- [ ] Effect parameter passing (uniforms)
   215→- [ ] Per-layer effect configuration
   216→
   217→### 4.2 Built-in Effects
   218→- [ ] **Outline** — edge detection, configurable color and thickness
   219→- [ ] **Tint** — multiply or blend toward a color
   220→- [ ] **Brightness** — multiply RGB values
   221→
   222→### 4.3 Custom Shaders
   223→- [ ] Load custom fragment shaders from file
   224→- [ ] Expose to Lua: `layer:set_shader(shader, params)`
   225→- [ ] Shader hot-reload during development (optional, nice-to-have)
   226→
   227→### 4.4 Lua Bindings
   228→```lua
   229→game:set_effect('outline', {color = 0x000000FF, thickness = 1})
... [20 more lines]

290→- Must support pitch shifting immediately
   291→- Should support additional effects eventually (reverb, filters)
   292→- Must work with Emscripten for web builds
   293→
   294→### 6.2 Core Audio
   295→- [ ] Audio device initialization
   296→- [ ] Sound loading (WAV, OGG)
   297→- [ ] Music loading (OGG)
   298→- [ ] Web: handle audio context unlock (requires user interaction)
   299→
   300→### 6.3 Playback Features
   301→- [ ] Sound playback with volume
   302→- [ ] **Pitch shifting** (essential)
   303→- [ ] Music playback (loop, stop, fade)
   304→- [ ] Master volume control
   305→
   306→### 6.4 Lua Bindings
   307→```lua
   308→local hit = an:sound_load('hit.ogg')
   309→an:sound_play(hit)
   310→an:sound_play(hit, {volume = 0.5, pitch = 1.2})
   311→
   312→local bgm = an:music_load('bgm.ogg')
   313→an:music_play(bgm, {loop = true})
   314→an:music_stop()
   315→an:music_volume(0.5)
   316→an:music_fade_out(1.0)  -- fade over 1 second
   317→```
   318→
   319→**Deliverable:** Audio with pitch shifting.
... [50 more lines]

370→end
   371→
   372→for _, s in ipairs(an:physics_get_sensor_enter('player', 'pickup')) do
   373→    local player, pickup = s.a, s.b
   374→    pickup:collect()
   375→end
   376→
   377→for _, h in ipairs(an:physics_get_contact_hit('ball', 'wall')) do
   378→    local speed = h.approach_speed
   379→    an:sound_play(bounce, {volume = speed / 100})
   380→end
   381→
   382→-- Spatial queries
   383→local nearby = an:physics_query_circle(x, y, 50, {'enemy'})
   384→local hit = an:physics_raycast_closest(x1, y1, x2, y2, {'wall'})
   385→
   386→-- Body management
   387→local body = an:physics_create_body('ball', 'dynamic', 'circle', 10)
   388→an:physics_set_position(body, x, y)
   389→an:physics_set_velocity(body, vx, vy)
   390→an:physics_apply_impulse(body, ix, iy)
   391→an:physics_destroy_body(body)
   392→```
   393→
   394→**Deliverable:** Full physics with events and queries.
   395→
   396→---
   397→
   398→## Phase 8: Random
   399→

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   378→    local speed = h.approach_speed
   379→    an:sound_play(bounce, {volume = speed / 100})
   380→end
   381→
   382→-- Spatial queries
   383→local nearby = an:physics_query_circle(x, y, 50, {'enemy'})
   384→local hit = an:physics_raycast_closest(x1, y1, x2, y2, {'wall'})
   385→
   386→-- Current sensor overlaps (not just enter/exit events)
   387→local overlaps = an:physics_get_sensor_overlaps(sensor_collider)
   388→
   389→-- Body management
   390→local body = an:physics_create_body('ball', 'dynamic', 'circle', 10)
   391→an:physics_set_position(body, x, y)

1→# Anchor Engine Specification
     2→
     3→*Anchor is a 2D game engine built around locality of behavior and minimal cognitive overhead. Code that belongs together stays together.*
     4→
     5→---
     6→
     7→## Table of Contents
     8→
     9→1. [Core Philosophy](#core-philosophy)
    10→2. [The Object Tree](#the-object-tree)
    11→3. [Lifecycle](#lifecycle)
    12→4. [Colliders, Springs, and Timers](#colliders-springs-and-timers)
    13→5. [Locality of Behavior](#locality-of-behavior)
    14→6. [Drawing](#drawing)
    15→7. [Lua Syntax Features](#lua-syntax-features)
    16→8. [YueScript Alternative](#yuescript-alternative)
    17→9. [YueScript Class System Integration](#yuescript-class-system-integration)
    18→10. [Technology Stack](#technology-stack)
    19→11. [Engine Services (C Side)](#engine-services-c-side)
    20→12. [Rendering Architecture](#rendering-architecture)
    21→13. [OpenGL Implementation Notes](#opengl-implementation-notes)
    22→14. [Error Handling](#error-handling)
    23→15. [Resolution and Scaling](#resolution-and-scaling)
    24→16. [Build System](#build-system)
    25→17. [File Structure](#file-structure)
    26→18. [Performance Path](#performance-path)
    27→19. [Migration Path](#migration-path)
    28→20. [Deferred Features](#deferred-features)
    29→
    30→---
... [5 more lines]

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     5→---
     6→
     7→## Table of Contents
     8→
     9→1. [Core Philosophy](#core-philosophy)
    10→2. [The Object Tree](#the-object-tree)
    11→3. [Lifecycle](#lifecycle)
    12→4. [Colliders, Springs, and Timers](#colliders-springs-and-timers)
    13→5. [Locality of Behavior](#locality-of-behavior)
    14→6. [Drawing](#drawing)
    15→7. [Lua Syntax Features](#lua-syntax-features)
    16→8. [YueScript Alternative](#yuescript-alternative)
    17→9. [YueScript Class System Integration](#yuescript-class-system-integration)
    18→10. [Technology Stack](#technology-stack)
    19→11. [Rendering Architecture](#rendering-architecture)
    20→12. [OpenGL Implementation Notes](#opengl-implementation-notes)
    21→13. [Error Handling](#error-handling)
    22→14. [Resolution and Scaling](#resolution-and-scaling)
    23→15. [Build System](#build-system)
    24→16. [File Structure](#file-structure)
    25→17. [Performance Path](#performance-path)
    26→18. [Migration Path](#migration-path)
    27→19. [Deferred Features](#deferred-features)
    28→
    29→---
    30→
    31→## Core Philosophy

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  1248→- **Graphics:** OpenGL 3.3 Core Profile (WebGL 2.0 compatible)
  1249→- **Physics:** Box2D 3.1
  1250→- **Platforms:** Windows (primary), Web (Emscripten), Linux (eventually)
  1251→
  1252→---
  1253→
  1254→## Rendering Architecture
  1255→
  1256→### OpenGL Renderer
  1257→
  1258→Anchor uses OpenGL 3.3 Core Profile for rendering, targeting 480×270 or 640×360 base resolution (per-game configurable). The low resolution is rendered to a framebuffer texture, then integer-scaled to the window with nearest-neighbor filtering for crisp pixels.

1→# Anchor Implementation Plan
     2→
     3→C engine with YueScript scripting, OpenGL rendering, targeting Windows and Web.
     4→
     5→---
     6→
     7→## Summary of Key Decisions
     8→
     9→| Area | Decision | Rationale |
    10→|------|----------|-----------|
    11→| Renderer | OpenGL | Smooth rotation, additive blending, performance headroom, console-portable |
    12→| Audio | TBD (miniaudio or SoLoud) | Need pitch shifting; SDL_mixer insufficient |
    13→| Physics | Box2D 3.1 | Already used, true ball-to-ball collisions needed |
    14→| Scripting | Lua 5.4 + YueScript | Build-time compilation with `-r` flag for line numbers |
    15→| Timestep | Fixed 60fps | Determinism matters for potential replay support |
    16→| Resolution | Per-game configurable | 480×270, 640×360, or custom; integer scaling |
    17→| C Structure | Single anchor.c | Monolithic file, easier navigation |
    18→| Resources | Live forever | Games are small enough; no unloading needed |
    19→| Distribution | Single executable | Assets embedded |
    20→
    21→---
    22→
    23→## Build Strategy
    24→
    25→### YueScript Compilation
    26→
    27→**Build-time compilation** — compile `.yue` → `.lua` during build, not at runtime.
    28→
    29→```
    30→game.yue ──► yue -r ──► game.lua ──► embedded in executable
... [564 more lines]

1→# Anchor Engine Specification
     2→
     3→*Anchor is a 2D game engine built around locality of behavior and minimal cognitive overhead. Code that belongs together stays together.*
     4→
     5→---
     6→
     7→## Table of Contents
     8→
     9→1. [Core Philosophy](#core-philosophy)
    10→2. [The Object Tree](#the-object-tree)
    11→3. [Lifecycle](#lifecycle)
    12→4. [Colliders, Springs, and Timers](#colliders-springs-and-timers)
    13→5. [Locality of Behavior](#locality-of-behavior)
    14→6. [Drawing](#drawing)
    15→7. [Lua Syntax Features](#lua-syntax-features)
    16→8. [YueScript Alternative](#yuescript-alternative)
    17→9. [YueScript Class System Integration](#yuescript-class-system-integration)
    18→10. [Technology Stack](#technology-stack)
    19→11. [Rendering Architecture](#rendering-architecture)
    20→12. [OpenGL Implementation Notes](#opengl-implementation-notes)
    21→13. [Error Handling](#error-handling)
    22→14. [Resolution and Scaling](#resolution-and-scaling)
    23→15. [Build System](#build-system)
    24→16. [File Structure](#file-structure)
    25→17. [Performance Path](#performance-path)
    26→18. [Migration Path](#migration-path)
    27→19. [Deferred Features](#deferred-features)
    28→
    29→---
    30→
... [1441 more lines]

1→# CLAUDE.md
     2→
     3→Guidelines for Claude Code instances working on Anchor and games built with it.
     4→
     5→---
     6→
     7→## Read First
     8→
     9→Read `docs/ANCHOR.md` before doing anything. It covers:
    10→- The mental model (engine services vs object tree)
    11→- How objects, timers, springs, and colliders work
    12→- The action-based vs rules-based spectrum
    13→- Technical implementation details
    14→
    15→**For the reasoning behind these decisions** — why the engine works the way it does, how to evaluate new features, the developer's working style — see the [Anchor Context Brief](#anchor-context-brief) at the end of this document.
    16→
    17→---
    18→
    19→## Session Workflow
    20→
    21→**Every Claude Code session follows this workflow.**
    22→
    23→### During Session
    24→
    25→- Work normally on requested tasks
    26→- Update `docs/ANCHOR.md` when APIs or architecture changes
    27→- Update `docs/ANCHOR_IMPLEMENTATION_PLAN.md` when tasks are completed
    28→- Update this file (`CLAUDE.md`) when new patterns or conventions are established
    29→
    30→### End of Session
... [870 more lines]

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  1456→Each step testable independently.
  1457→
  1458→---
  1459→
  1460→## Deferred Features
  1461→
  1462→Not implementing now:
  1463→
  1464→- Hot reloading
  1465→- Replay system
  1466→- Visual debugger
  1467→- Console/REPL
  1468→- Positional audio (panning, 3D)
  1469→- SDF text rendering (for website)
  1470→- High-resolution text layer
  1471→

1→# Anchor Implementation Plan
     2→
     3→C engine with YueScript scripting, OpenGL rendering, targeting Windows and Web.
     4→
     5→---
     6→
     7→## Summary of Key Decisions
     8→
     9→| Area | Decision | Rationale |
    10→|------|----------|-----------|
    11→| Renderer | OpenGL | Smooth rotation, additive blending, performance headroom, console-portable |
    12→| Audio | TBD (miniaudio or SoLoud) | Need pitch shifting; SDL_mixer insufficient |
    13→| Physics | Box2D 3.1 | Already used, true ball-to-ball collisions needed |
    14→| Scripting | Lua 5.4 + YueScript | Build-time compilation with `-r` flag for line numbers |
    15→| Timestep | Fixed 60fps | Determinism matters for potential replay support |
    16→| Resolution | Per-game configurable | 480×270, 640×360, or custom; integer scaling |
    17→| C Structure | Single anchor.c | Monolithic file, easier navigation |
    18→| Resources | Live forever | Games are small enough; no unloading needed |
    19→| Distribution | Single executable | Assets embedded |
    20→
    21→---
    22→
    23→## Build Strategy
    24→
    25→### YueScript Compilation
    26→
    27→**Build-time compilation** — compile `.yue` → `.lua` during build, not at runtime.
    28→
    29→```
    30→game.yue ──► yue -r ──► game.lua ──► embedded in executable
... [564 more lines]

1→# CLAUDE.md
     2→
     3→Guidelines for Claude Code instances working on Anchor and games built with it.
     4→
     5→---
     6→
     7→## Read First
     8→
     9→Read `docs/ANCHOR.md` before doing anything. It covers:
    10→- The mental model (engine services vs object tree)
    11→- How objects, timers, springs, and colliders work
    12→- The action-based vs rules-based spectrum
    13→- Technical implementation details
    14→
    15→**For the reasoning behind these decisions** — why the engine works the way it does, how to evaluate new features, the developer's working style — see the [Anchor Context Brief](#anchor-context-brief) at the end of this document.
    16→
    17→---
    18→
    19→## Session Workflow
    20→
    21→**Every Claude Code session follows this workflow.**
    22→
    23→### During Session
    24→
    25→- Work normally on requested tasks
    26→- Update `docs/ANCHOR.md` when APIs or architecture changes
    27→- Update `docs/ANCHOR_IMPLEMENTATION_PLAN.md` when tasks are completed
    28→- Update this file (`CLAUDE.md`) when new patterns or conventions are established
    29→
    30→### End of Session
... [870 more lines]

1→# Anchor Engine Specification
     2→
     3→*Anchor is a 2D game engine built around locality of behavior and minimal cognitive overhead. Code that belongs together stays together.*
     4→
     5→---
     6→
     7→## Table of Contents
     8→
     9→1. [Core Philosophy](#core-philosophy)
    10→2. [The Object Tree](#the-object-tree)
    11→3. [Lifecycle](#lifecycle)
    12→4. [Colliders, Springs, and Timers](#colliders-springs-and-timers)
    13→5. [Locality of Behavior](#locality-of-behavior)
    14→6. [Drawing](#drawing)
    15→7. [Lua Syntax Features](#lua-syntax-features)
    16→8. [YueScript Alternative](#yuescript-alternative)
    17→9. [YueScript Class System Integration](#yuescript-class-system-integration)
    18→10. [Technology Stack](#technology-stack)
    19→11. [Rendering Architecture](#rendering-architecture)
    20→12. [OpenGL Implementation Notes](#opengl-implementation-notes)
    21→13. [Error Handling](#error-handling)
    22→14. [Resolution and Scaling](#resolution-and-scaling)
    23→15. [Build System](#build-system)
    24→16. [File Structure](#file-structure)
    25→17. [Performance Path](#performance-path)
    26→18. [Migration Path](#migration-path)
    27→19. [Deferred Features](#deferred-features)
    28→
    29→---
    30→
... [1441 more lines]

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  1401→**Web:** `build.sh` (Emscripten)
  1402→
  1403→---
  1404→
  1405→## File Structure
  1406→
  1407→```
  1408→anchor/
  1409→├── src/
  1410→│   └── anchor.c            # Single monolithic C file
  1411→├── yue/                    # YueScript engine code
  1412→│   ├── object.yue
  1413→│   ├── timer.yue
  1414→│   ├── spring.yue
  1415→│   ├── collider.yue
  1416→│   └── init.yue
  1417→├── lua/                    # Compiled Lua output
  1418→├── game/                   # Game YueScript
  1419→│   └── main.yue
  1420→├── game_lua/               # Compiled game Lua
  1421→├── assets/
  1422→├── build.bat               # Windows build
  1423→└── build.sh                # Web build (Emscripten)
  1424→```
  1425→
  1426→---
  1427→
  1428→## Performance Path

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file /home/adn/a327ex/Anchor/.claude/CLAUDE.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     5→---
     6→
     7→## Read First
     8→
     9→Read `docs/ANCHOR.md` before doing anything. It covers:
    10→- The object tree model (tree-based ownership, automatic cleanup)
    11→- How objects, timers, springs, and colliders work
    12→- The action-based vs rules-based spectrum
    13→- Technical implementation details (OpenGL rendering, Box2D physics)
    14→
    15→**For the reasoning behind these decisions** — why the engine works the way it does, how to evaluate new features, the developer's working style — see the [Anchor Context Brief](#anchor-context-brief) at the end of this document.
    16→
    17→---

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file /home/adn/a327ex/Anchor/.claude/CLAUDE.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   240→        local player, pickup = c.a, c.b
   241→        pickup:collect()
   242→    end
   243→    
   244→    -- High-speed impacts (for sounds/particles)
   245→    for _, c in ipairs(an:physics_get_contact_hit('ball', 'wall')) do
   246→        local speed = c.approach_speed
   247→        an:sound_play(bounce_sound, {volume = speed / 100})
   248→    end
   249→end
   250→```
   251→
   252→### Timers and Springs
   253→

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  1250→- **Platforms:** Windows (primary), Web (Emscripten), Linux (eventually)
  1251→
  1252→---
  1253→
  1254→## Rendering
  1255→
  1256→Anchor uses OpenGL 3.3 Core Profile (WebGL 2.0 compatible) for rendering, targeting 480×270 or 640×360 base resolution (per-game configurable). The low resolution is rendered to a framebuffer texture, then integer-scaled to the window with nearest-neighbor filtering for crisp pixels.
  1257→
  1258→### Layers
  1259→
  1260→Each layer is a framebuffer object (FBO). Draw commands are batched per layer:
  1261→
  1262→1. Lua calls `layer:circle()`, `layer:draw_image()`, etc.
  1263→2. Geometry is batched into vertex buffers (batch breaks on texture/shader/blend mode changes)
  1264→3. At end of frame, layers are rendered via draw calls
  1265→4. Post-processing shaders are applied per-layer
  1266→5. Layers composite to screen in defined order
  1267→
  1268→```lua
  1269→game = an:layer('game')
  1270→effects = an:layer('effects')
  1271→ui = an:layer('ui')
  1272→
  1273→game:circle(x, y, radius, color)
  1274→game:rectangle(x, y, w, h, color)
  1275→game:line(x1, y1, x2, y2, color, width)
  1276→game:draw_image(img, x, y, r, sx, sy, ox, oy, color)
  1277→```
  1278→
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     3→*Anchor is a 2D game engine built around locality of behavior and minimal cognitive overhead. Code that belongs together stays together.*
     4→
     5→---
     6→
     7→## Table of Contents
     8→
     9→1. [Core Philosophy](#core-philosophy)
    10→2. [The Object Tree](#the-object-tree)
    11→3. [Lifecycle](#lifecycle)
    12→4. [Colliders, Springs, and Timers](#colliders-springs-and-timers)
    13→5. [Locality of Behavior](#locality-of-behavior)
    14→6. [Drawing](#drawing)
    15→7. [Lua Syntax Features](#lua-syntax-features)
    16→8. [YueScript Alternative](#yuescript-alternative)
    17→9. [YueScript Class System Integration](#yuescript-class-system-integration)
    18→10. [Technology Stack](#technology-stack)
    19→11. [Rendering](#rendering)
    20→12. [Error Handling](#error-handling)
    21→13. [Build and Distribution](#build-and-distribution)
    22→14. [File Structure](#file-structure)
    23→15. [Performance Path](#performance-path)
    24→16. [Deferred Features](#deferred-features)
    25→
    26→---
    27→
    28→## Core Philosophy

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

1325→
  1326→## Error Handling
  1327→
  1328→LÖVE-style protected calls. Errors display stacktrace on screen; application continues running in error state.
  1329→
  1330→```c
  1331→if (lua_pcall(L, nargs, nresults, error_handler) != LUA_OK) {
  1332→    strncpy(error_message, lua_tostring(L, -1), sizeof(error_message));
  1333→    app_state = STATE_ERROR;
  1334→}
  1335→```
  1336→
  1337→No restart on keypress — user closes and reopens the application.
  1338→
  1339→---
  1340→
  1341→## Resolution and Scaling
  1342→
  1343→Fixed resolution per game (480×270 or 640×360), integer scaled with letterboxing. Nearest-neighbor filtering for crisp pixels.
  1344→
  1345→---
  1346→
  1347→## Build System
  1348→
  1349→Simple build scripts, no CMake:
  1350→
  1351→**Windows:** `build.bat`
  1352→**Web:** `build.sh` (Emscripten)
  1353→
  1354→---
... [67 more lines]

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  1337→No restart on keypress — user closes and reopens the application.
  1338→
  1339→---
  1340→
  1341→## Build and Distribution
  1342→
  1343→### Resolution
  1344→
  1345→Fixed resolution per game (480×270 or 640×360), integer scaled with letterboxing. Nearest-neighbor filtering for crisp pixels.
  1346→
  1347→### Build Scripts
  1348→
  1349→Simple build scripts, no CMake:
  1350→- **Windows:** `build.bat`
  1351→- **Web:** `build.sh` (Emscripten)
  1352→
  1353→### Distribution
  1354→
  1355→Single executable with all assets embedded. No external files needed.
  1356→
  1357→---
  1358→
  1359→## File Structure

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  1388→3. Lua objects become thin wrappers around C resources
  1389→
  1390→The tree stays in Lua. Only inner loops move to C based on profiling data.
  1391→
  1392→---
  1393→
  1394→## Deferred Features
  1395→
  1396→Not implementing now:
  1397→
  1398→- Hot reloading

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file /home/adn/a327ex/Anchor/docs/ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   263→if an:is_pressed('shoot') then ... end   -- just pressed this frame
   264→if an:is_down('move_left') then ... end  -- currently held
   265→if an:is_released('shoot') then ... end  -- just released this frame
   266→
   267→local mx, my = an:mouse_position()  -- screen coordinates
   268→-- World position computed in YueScript using camera transform
   269→```
   270→
   271→**Deliverable:** Keyboard and mouse input with action bindings.
   272→

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  1312→```
  1313→
  1314→Built-in effects: `outline`, `tint`, `brightness`. Additional effects via custom shaders.
  1315→
  1316→### Colors
  1317→
  1318→Colors are 32-bit RGBA values (e.g., `0xFF0000FF` for red). A built-in palette is available:
  1319→
  1320→```lua
  1321→an.colors.white[0]   -- pure white
  1322→an.colors.black[0]   -- pure black
  1323→an.colors.red[0]     -- etc.
  1324→```
  1325→
  1326→Palette colors have brightness variants: `[0]` is the base color, negative indices are darker, positive are lighter.
  1327→
  1328→### Draw Order
  1329→
  1330→Draw order within a layer is submission order (when Lua calls draw functions), not tree order.
  1331→
  1332→### WebGL Compatibility
  1333→
  1334→OpenGL 3.3 Core Profile maps cleanly to WebGL 2.0. Avoid geometry shaders, compute shaders, and extension-dependent features.
  1335→
  1336→---

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   298→```
   299→
   300→Each spring object represents one spring with its own value.
   301→
   302→### Timer
   303→
   304→A timer object provides delayed and repeating callbacks, plus tweening. Timer methods (`after`, `every`, `tween`) auto-initialize if needed, so explicit `self:timer()` is optional:
   305→
   306→```lua
   307→-- One-shot (anonymous)
   308→self:after(0.5, function() self.can_shoot = true end)
   309→
   310→-- One-shot (named — can be cancelled/replaced)
   311→self:after(0.15, 'flash', function() self.flashing = false end)
   312→

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1→# Anchor Implementation Plan
     2→
     3→C engine with YueScript scripting, OpenGL rendering, targeting Windows and Web.
     4→
     5→---
     6→
     7→## Summary of Key Decisions
     8→
     9→| Area | Decision | Rationale |
    10→|------|----------|-----------|
    11→| Renderer | OpenGL | Smooth rotation, additive blending, performance headroom, console-portable |
    12→| Audio | TBD (miniaudio or SoLoud) | Need pitch shifting; SDL_mixer insufficient |
    13→| Physics | Box2D 3.1 | Already used, true ball-to-ball collisions needed |
    14→| Scripting | Lua 5.4 + YueScript | Build-time compilation with `-r` flag for line numbers |
    15→| Timestep | Fixed 60fps | Determinism matters for potential replay support |
    16→| Resolution | Per-game configurable | 480×270, 640×360, or custom; integer scaling |
    17→| C Structure | Single anchor.c | Monolithic file, easier navigation |
    18→| Resources | Live forever | Games are small enough; no unloading needed |
    19→| Distribution | Single executable | Assets embedded |
    20→
    21→---
    22→
    23→## Build Strategy
    24→
    25→### YueScript Compilation
    26→
    27→**Build-time compilation** — compile `.yue` → `.lua` during build, not at runtime.
    28→
    29→```
    30→game.yue ──► yue -r ──► game.lua ──► embedded in executable
... [564 more lines]

1→# Anchor Engine Specification
     2→
     3→*Anchor is a 2D game engine built around locality of behavior and minimal cognitive overhead. Code that belongs together stays together.*
     4→
     5→---
     6→
     7→## Table of Contents
     8→
     9→1. [Core Philosophy](#core-philosophy)
    10→2. [The Object Tree](#the-object-tree)
    11→3. [Lifecycle](#lifecycle)
    12→4. [Colliders, Springs, and Timers](#colliders-springs-and-timers)
    13→5. [Locality of Behavior](#locality-of-behavior)
    14→6. [Drawing](#drawing)
    15→7. [Lua Syntax Features](#lua-syntax-features)
    16→8. [YueScript Alternative](#yuescript-alternative)
    17→9. [YueScript Class System Integration](#yuescript-class-system-integration)
    18→10. [Technology Stack](#technology-stack)
    19→11. [Rendering](#rendering)
    20→12. [Error Handling](#error-handling)
    21→13. [Build and Distribution](#build-and-distribution)
    22→14. [File Structure](#file-structure)
    23→15. [Performance Path](#performance-path)
    24→16. [Deferred Features](#deferred-features)
    25→
    26→---
    27→
    28→## Core Philosophy
    29→
    30→### Locality of Behavior
... [1384 more lines]

1→# CLAUDE.md
     2→
     3→Guidelines for Claude Code instances working on Anchor and games built with it.
     4→
     5→---
     6→
     7→## Read First
     8→
     9→Read `docs/ANCHOR.md` before doing anything. It covers:
    10→- The object tree model (tree-based ownership, automatic cleanup)
    11→- How objects, timers, springs, and colliders work
    12→- The action-based vs rules-based spectrum
    13→- Technical implementation details (OpenGL rendering, Box2D physics)
    14→
    15→**For the reasoning behind these decisions** — why the engine works the way it does, how to evaluate new features, the developer's working style — see the [Anchor Context Brief](#anchor-context-brief) at the end of this document.
    16→
    17→---
    18→
    19→## Session Workflow
    20→
    21→**Every Claude Code session follows this workflow.**
    22→
    23→### During Session
    24→
    25→- Work normally on requested tasks
    26→- Update `docs/ANCHOR.md` when APIs or architecture changes
    27→- Update `docs/ANCHOR_IMPLEMENTATION_PLAN.md` when tasks are completed
    28→- Update this file (`CLAUDE.md`) when new patterns or conventions are established
    29→
    30→### End of Session
... [870 more lines]

User has answered your questions: "Color indices use [0] as base (an.colors.white[0]), but Lua tables are 1-indexed. Is this intentional C-style indexing, or should it be [1] as base with negatives darker and positives lighter?"="This was how I did colors in Anchor so far, but I think it's easier to just have direct colors and leave darker/brighter values for later. So just assume a default palette exists (an.colors.white, etc), and that colors themselves passed to functions follow whatever convention this is (is it a Lua table? C struct pointer? I don't know, but it doesn't matter API-wise)", "ANCHOR.md Drawing example uses self.body:get_position() but Collider section creates self.collider. Which name should the collider use?"="All mixin-like objects, timers, springs, colliders, and more that I ended up not mentioning, are not objects that live as children of their parents. So if the collider object has a body attribute, and you want to access that from the player, and the collider on the player is on the .collider attribute, it'd be self.collider.body. However, the collider exposes :get_position such that the parent doesn't have to access the internal attributes, so it'd be, from the parent, self.collider:get_position(). The one change we made to the engine is that EVERY object is a part of the tree now, so that's how it goes.", "Objects can have special methods (update:, late_update:) AND actions (/ operator). If both exist, what happens?"="Both run", "Timers are described as 'child objects' but stored in @timers array, not @children. Which is the true model?"="Could you show me the example exactly? They're supposed to be child objects, I don't remember where a timer arrays exists.". You can now continue with the user's answers in mind.

User has answered your questions: "The YueScript reference implementation stores timers in @timers array. Should this be changed to add timers as children via @\add_child?"="That's perhaps unfortunate naming, but @timers inside the timer object is each after, every, tween, etc call that's running. Each high-level "timer" can have multiple internal "timers", each being after, every, etc, calls that were called for that high-level timer. Does this make sense? Perhaps we should call the internal ones another name. The internal ones should not be children because that's just how the timer object itself works, in the same way that the box2d body should be a child of the collider object, because the point of the collider is to hide the box2d complexity, not expose it to the tree.", "For physics_get_contact_enter('ball', 'wall'), does tag order matter? Is c.a always the first tag and c.b the second?"="Don't care yet", "Layer composition order - what determines which layer renders on top?"="Creation order by default, can be specified with named order list if needed.", "Build scripts: You're on Linux. Should build.sh handle both Linux and Web, or have separate scripts?"="build.sh for Linux". You can now continue with the user's answers in mind.

User has answered your questions: "For the internal timer array, what should it be called to avoid confusion with the Timer object itself?"="@callbacks", "all('enemy') searches descendants. If an object has name='enemy' AND tag 'enemy', is it matched once or twice? And can multiple objects have the same name?"="Defer to implementation", "Should rectangle support rounded corners? game:rectangle(x, y, w, h, color, rx, ry)?"="Separate function". You can now continue with the user's answers in mind.

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1240→- **Window/Input:** SDL2
  1241→- **Audio:** TBD (miniaudio or SoLoud — needs pitch shifting support)
  1242→- **Graphics:** OpenGL 3.3 Core Profile (WebGL 2.0 compatible)
  1243→- **Physics:** Box2D 3.1
  1244→- **Platforms:** Windows, Linux, Web (Emscripten)
  1245→
  1246→---
  1247→
  1248→## Rendering

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     1→# Anchor Implementation Plan
     2→
     3→C engine with YueScript scripting, OpenGL rendering, targeting Windows, Linux, and Web.
     4→
     5→---
     6→
     7→## Summary of Key Decisions

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1352→### Resolution
  1353→
  1354→Fixed resolution per game (480×270 or 640×360), integer scaled with letterboxing. Nearest-neighbor filtering for crisp pixels.
  1355→
  1356→### Build Scripts
  1357→
  1358→Simple build scripts, no CMake:
  1359→- **Windows:** `build.bat`
  1360→- **Linux:** `build.sh`
  1361→- **Web:** `build-web.sh` (Emscripten)
  1362→
  1363→### Distribution
  1364→
  1365→Single executable with all assets embedded. No external files needed.

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  1382→├── game/                   # Game YueScript
  1383→│   └── main.yue
  1384→├── game_lua/               # Compiled game Lua
  1385→├── assets/
  1386→├── build.bat               # Windows build
  1387→├── build.sh                # Linux build
  1388→└── build-web.sh            # Web build (Emscripten)
  1389→```
  1390→
  1391→---
  1392→

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    48→├── game/                   # Game YueScript
    49→│   └── main.yue
    50→├── game_lua/               # Compiled game Lua
    51→├── assets/
    52→├── build.bat               # Windows build
    53→├── build.sh                # Linux build
    54→└── build-web.sh            # Web build (Emscripten)
    55→```
    56→
    57→---
    58→

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.claude/CLAUDE.md:449:                game:circle(self.x, self.y, 8, an.colors.white[0])
.claude/CLAUDE.md:608:                         game:circle(self.x, self.y, 8, an.colors.white[0])
docs/ANCHOR.md:651:                game:circle(self.x, self.y, 8, an.colors.white[0])
docs/ANCHOR.md:668:                    game:circle(self.x, self.y, 8, an.colors.white[0])
docs/ANCHOR.md:778:             game\circle @x, @y, 8, an.colors.white[0]
docs/ANCHOR.md:859:                  / (dt) => game\circle @x, @y, 8, an.colors.white[0])
docs/ANCHOR.md:869:               game\circle @x, @y, 8, an.colors.white[0]
docs/ANCHOR.md:1318:an.colors.white[0]   -- pure white
docs/ANCHOR.md:1319:an.colors.black[0]   -- pure black
docs/ANCHOR.md:1320:an.colors.red[0]     -- etc.
website/context/ANCHOR.md:658:                game:circle(self.x, self.y, 8, an.colors.white[0])
website/context/ANCHOR.md:675:                    game:circle(self.x, self.y, 8, an.colors.white[0])
website/context/ANCHOR.md:785:             game\circle @x, @y, 8, an.colors.white[0]
website/context/ANCHOR.md:866:                  / (dt) => game\circle @x, @y, 8, an.colors.white[0])
website/context/ANCHOR.md:876:               game\circle @x, @y, 8, an.colors.white[0]
website/context/CLAUDE.md:449:                game:circle(self.x, self.y, 8, an.colors.white[0])
website/context/CLAUDE.md:608:                         game:circle(self.x, self.y, 8, an.colors.white[0])
website/files/Opus 4.5/ANCHOR.md:658:                game:circle(self.x, self.y, 8, an.colors.white[0])
website/files/Opus 4.5/ANCHOR.md:675:                    game:circle(self.x, self.y, 8, an.colors.white[0])
website/files/Opus 4.5/ANCHOR.md:785:             game\circle @x, @y, 8, an.colors.white[0]
website/files/Opus 4.5/ANCHOR.md:866:                  / (dt) => game\circle @x, @y, 8, an.colors.white[0])
website/files/Opus 4.5/ANCHOR.md:876:               game\circle @x, @y, 8, an.colors.white[0]
website/files/Opus 4.5/CLAUDE.md:339:                game:circle(self.x, self.y, 8, an.colors.white[0])
website/files/Opus 4.5/CLAUDE.md:498:                         game:circle(self.x, self.y, 8, an.colors.white[0])

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<tool_use_error>String to replace not found in file.
String: ### Colors

Colors are 32-bit RGBA values (e.g., `0xFF0000FF` for red). A built-in palette is available:

```lua
an.colors.white[0]   -- pure white
an.colors.black[0]   -- pure black
an.colors.red[0]     -- etc.
```

Palette colors have brightness variants: `[0]` is the base color, negative indices are darker, positive are lighter.</tool_use_error>

1308→game:set_shader(custom, {time = t, intensity = 0.5})
  1309→```
  1310→
  1311→Built-in effects: `outline`, `tint`, `brightness`. Additional effects via custom shaders.
  1312→
  1313→### Colors
  1314→
  1315→Colors are 32-bit RGBA values (e.g., `0xFF0000FF` for red). A built-in palette is available:
  1316→
  1317→```lua
  1318→an.colors.white   -- pure white
  1319→an.colors.black[0]   -- pure black
  1320→an.colors.red[0]     -- etc.
  1321→```
  1322→
  1323→Palette colors have brightness variants: `[0]` is the base color, negative indices are darker, positive are lighter.
  1324→
  1325→### Draw Order
  1326→
  1327→Draw order within a layer is submission order (when Lua calls draw functions), not tree order.
  1328→
  1329→### WebGL Compatibility
  1330→
  1331→OpenGL 3.3 Core Profile maps cleanly to WebGL 2.0. Avoid geometry shaders, compute shaders, and extension-dependent features.
  1332→
  1333→---
  1334→
  1335→## Error Handling
  1336→
  1337→LÖVE-style protected calls. Errors display stacktrace on screen; application continues running in error state.

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  1309→```
  1310→
  1311→Built-in effects: `outline`, `tint`, `brightness`. Additional effects via custom shaders.
  1312→
  1313→### Colors
  1314→
  1315→Colors are 32-bit RGBA values (e.g., `0xFF0000FF` for red). A built-in palette is available:
  1316→
  1317→```lua
  1318→an.colors.white
  1319→an.colors.black
  1320→an.colors.red
  1321→-- etc.
  1322→```
  1323→
  1324→### Draw Order
  1325→
  1326→Draw order within a layer is submission order (when Lua calls draw functions), not tree order.

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   386→
   387→Objects draw themselves in their update function. Drawing is decoupled from tree structure — an object can draw to any layer.
   388→
   389→```lua
   390→function player:update(dt)
   391→    -- Update logic
   392→    self.x, self.y = self.collider:get_position()
   393→    
   394→    -- Drawing to game layer
   395→    game:push(self.x, self.y, self.r, self.main.x, self.main.x)
   396→        game:circle(self.x, self.y, 10, self.color)

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The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1179→```
  1180→
  1181→Forgetting `super` means no `@children`, `@tags`, etc.
  1182→
  1183→### Special Methods
  1184→
  1185→The engine automatically calls these methods on objects if they exist:
  1186→
  1187→- `early_update(dt)` — called during early phase
  1188→- `update(dt)` — called during main phase
  1189→- `late_update(dt)` — called during late phase (often used for drawing)
  1190→- `destroy()` — called when object is removed from tree
  1191→
  1192→Define them as regular class methods:
  1193→```yuescript
  1194→class enemy extends object
  1195→  update: (dt) =>
  1196→    @x, @y = @collider\get_position!
  1197→
  1198→  late_update: (dt) =>
  1199→    game\circle @x, @y, @radius, @color
  1200→```
  1201→
  1202→**Methods and actions both run.** If an object has both an `update:` method and `/` actions, the method runs first, then the actions. This allows class-defined behavior to coexist with dynamically added behavior.
  1203→
  1204→### Colliders and Springs Are Factory Functions
  1205→
  1206→Colliders and springs are created by factory functions that return objects with specialized functionality:

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1038:    @\timer! unless @timers
1044:      table.insert @timers, timer_obj
1046:      table.insert @timers, {delay: delay, elapsed: 0, fn: name_or_fn}
1050:    @\timer! unless @timers
1056:      table.insert @timers, timer_obj
1058:      table.insert @timers, {interval: interval, elapsed: 0, fn: name_or_fn, repeating: true}

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1032→    else
  1033→      table.insert @late_actions, {fn: name_or_fn}
  1034→    @
  1035→  
  1036→  -- Timers (internal @callbacks array stores scheduled after/every/tween entries)
  1037→  after: (delay, name_or_fn, fn) =>
  1038→    @\timer! unless @callbacks
  1039→    if type(name_or_fn) == 'string'
  1040→      name, func = name_or_fn, fn
  1041→      @[name]\kill! if @[name] and @[name].kill
  1042→      timer_obj = {name: name, delay: delay, elapsed: 0, fn: func, kill: -> @dead = true}
  1043→      @[name] = timer_obj
  1044→      table.insert @callbacks, timer_obj
  1045→    else
  1046→      table.insert @callbacks, {delay: delay, elapsed: 0, fn: name_or_fn}
  1047→    @
  1048→
  1049→  every: (interval, name_or_fn, fn) =>
  1050→    @\timer! unless @callbacks
  1051→    if type(name_or_fn) == 'string'
  1052→      name, func = name_or_fn, fn
  1053→      @[name]\kill! if @[name] and @[name].kill
  1054→      timer_obj = {name: name, interval: interval, elapsed: 0, fn: func, repeating: true, kill: -> @dead = true}
  1055→      @[name] = timer_obj
  1056→      table.insert @callbacks, timer_obj
  1057→    else
  1058→      table.insert @callbacks, {interval: interval, elapsed: 0, fn: name_or_fn, repeating: true}
  1059→    @
  1060→  
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  1252→### Layers
  1253→
  1254→Each layer is a framebuffer object (FBO). Draw commands are batched per layer:
  1255→
  1256→1. Lua calls `layer:circle()`, `layer:draw_image()`, etc.
  1257→2. Geometry is batched into vertex buffers (batch breaks on texture/shader/blend mode changes)
  1258→3. At end of frame, layers are rendered via draw calls
  1259→4. Post-processing shaders are applied per-layer
  1260→5. Layers composite to screen in creation order (first created = bottom, last = top)
  1261→
  1262→Layer order can be overridden if needed:
  1263→```lua
  1264→an:set_layer_order({'game', 'effects', 'ui'})
  1265→```
  1266→
  1267→```lua
  1268→game = an:layer('game')
  1269→effects = an:layer('effects')

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

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   157→- [ ] Vertex buffer for batched geometry
   158→- [ ] Single draw call per batch where possible
   159→- [ ] Vertex format: position, UV, color
   160→
   161→### 3.3 Shape Primitives
   162→- [ ] `circle(x, y, radius, color)` — filled circle via instanced quads or geometry
   163→- [ ] `rectangle(x, y, w, h, color)` — filled rectangle
   164→- [ ] `rounded_rectangle(x, y, w, h, rx, ry, color)` — filled rectangle with rounded corners
   165→- [ ] `line(x1, y1, x2, y2, color, width)` — line with thickness
   166→
   167→### 3.4 Sprite System
   168→- [ ] Texture loading via stb_image
   169→- [ ] `draw_image(img, x, y, r, sx, sy, ox, oy, color)`

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   190→```lua
   191→game = an:layer('game')
   192→effects = an:layer('effects')
   193→
   194→game:circle(x, y, radius, color)
   195→game:rectangle(x, y, w, h, color)
   196→game:rounded_rectangle(x, y, w, h, rx, ry, color)
   197→game:line(x1, y1, x2, y2, color, width)
   198→game:draw_image(img, x, y, r, sx, sy, ox, oy, color)
   199→
   200→game:push(x, y, r, sx, sy)
   201→game:pop()

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  1268→game = an:layer('game')
  1269→effects = an:layer('effects')
  1270→ui = an:layer('ui')
  1271→
  1272→game:circle(x, y, radius, color)
  1273→game:rectangle(x, y, w, h, color)
  1274→game:rounded_rectangle(x, y, w, h, rx, ry, color)
  1275→game:line(x1, y1, x2, y2, color, width)
  1276→game:draw_image(img, x, y, r, sx, sy, ox, oy, color)
  1277→```
  1278→
  1279→### Transform Stack

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

User has answered your questions: "When set_blend_mode('additive') is called, does it persist until explicitly changed back, or reset after each draw call?"="Defer this to implementation.", "The collider factory returns a plain table with methods, but it's added as a tree child via +. How does a plain table become a proper tree object?"="There should be no concept of "factory". Collider, spring, timer, etc, should always be tree objects.", "Dead actions (with @dead = true) need cleanup, but they're in @actions arrays, not @children. When/how are they removed?"="Separate cleanup pass". You can now continue with the user's answers in mind.

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  1200→```
  1201→
  1202→**Methods and actions both run.** If an object has both an `update:` method and `/` actions, the method runs first, then the actions. This allows class-defined behavior to coexist with dynamically added behavior.
  1203→
  1204→### Colliders, Springs, and Timers Are Tree Objects
  1205→
  1206→Colliders, springs, and timers are all proper tree objects (classes extending `object`). They live in `@children` like any other child, and die when their parent dies.
  1207→
  1208→```yuescript
  1209→class collider extends object
  1210→  new: (tag, body_type, shape_type, ...) =>
  1211→    super 'collider'
  1212→    @body_id = an\physics_create_body tag, body_type, shape_type, ...
  1213→
  1214→  get_position: => an\physics_get_position @body_id
  1215→  set_velocity: (vx, vy) => an\physics_set_velocity @body_id, vx, vy
  1216→
  1217→  destroy: =>
  1218→    an\physics_destroy_body @body_id
  1219→
  1220→-- Usage: added as child via + operator
  1221→@ + collider 'player', 'dynamic', 'circle', 12
  1222→```
  1223→
  1224→The `destroy` method is called automatically when the collider dies (when parent dies or when explicitly killed).
  1225→
  1226→### Method vs Property Access
  1227→
  1228→In YueScript:

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   206→## Lifecycle
   207→
   208→### Update Order
   209→
   210→Each frame:
   211→
   212→1. **Collect all objects** — Traverse tree, gather all non-dead objects
   213→2. **Early actions** (`%` operator) — Run all early_action functions (tree order)
   214→3. **Main actions** (`/` operator) — Run all action functions (tree order)
   215→4. **Late actions** (`//` operator) — Run all late_action functions (tree order)
   216→5. **Cleanup** — Remove dead objects, remove dead actions, call destroy() hooks
   217→
   218→Objects created during the frame are collected in the next frame (they don't run actions in the frame they're created).
   219→
   220→### Action Phase Execution

Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

No matches found

300→Each spring object represents one spring with its own value.
   301→
   302→### Timer
   303→
   304→A timer object provides delayed and repeating callbacks, plus tweening. Timer methods (`after`, `every`, `tween`) auto-initialize if needed, so explicit `self:timer()` is optional:
   305→
   306→```lua
   307→-- One-shot (anonymous)
   308→self:after(0.5, function() self.can_shoot = true end)
   309→
   310→-- One-shot (named — can be cancelled/replaced)
   311→self:after(0.15, 'flash', function() self.flashing = false end)
   312→
   313→-- Repeating (anonymous)
   314→self:every(2, function() self:spawn_enemy() end)
   315→
   316→-- Repeating (named)
   317→self:every(1, 'regen', function() self.hp = self.hp + 1 end)
   318→
   319→-- Cancel a named timer
   320→self.flash:kill()
   321→
   322→-- Tween (also provided by timer)
   323→self:tween(0.5, self, {x = 100, y = 200}, math.cubic_in_out, function()
   324→    self:kill()
   325→end)
   326→```
   327→
   328→Timer signature: `after(duration, [name], callback)` — the name parameter is optional and appears in the middle position.
   329→
... [5 more lines]

User has answered your questions: "Timer section says 'self:after() auto-initializes' but the code shows '@\timer! unless @callbacks'. What's the intended model?"="Timer is an object that has in it :after, :every, :tween, etc methods. Initializing it is just like instantiating any object.". You can now continue with the user's answers in mind.

User has answered your questions: "If Timer is a child object with after/every/tween methods, how should the API look? Current examples use self:after() directly."="Examples that are self:after() should be self.timer:after().". You can now continue with the user's answers in mind.

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   298→```
   299→
   300→Each spring object represents one spring with its own value.
   301→
   302→### Timer
   303→
   304→A timer object provides delayed and repeating callbacks, plus tweening. Add a timer as a child, then call its methods:
   305→
   306→```lua
   307→-- Add timer child (typically in constructor)
   308→self + timer()
   309→
   310→-- One-shot (anonymous)
   311→self.timer:after(0.5, function() self.can_shoot = true end)
   312→
   313→-- One-shot (named — can be cancelled/replaced)
   314→self.timer:after(0.15, 'flash', function() self.flashing = false end)
   315→
   316→-- Repeating (anonymous)
   317→self.timer:every(2, function() self:spawn_enemy() end)
   318→
   319→-- Repeating (named)
   320→self.timer:every(1, 'regen', function() self.hp = self.hp + 1 end)
   321→
   322→-- Cancel a named callback
   323→self.timer.flash:kill()
   324→
   325→-- Tween
   326→self.timer:tween(0.5, self, {x = 100, y = 200}, math.cubic_in_out, function()
... [9 more lines]

354:    self:tween(self.duration, self, {v = 0, sx = 0, sy = 0}, math.linear, function()
601:self:after(0.5, function() self.can_shoot = true end)
604:self:after(0.15, 'flash', function() self.flashing = false end)

340→
   341→```lua
   342→-- Everything about this particle is RIGHT HERE
   343→emoji_particle = class:class_new(object)
   344→function emoji_particle:new(x, y, args)
   345→    self:object(nil, args)
   346→    self.x, self.y = x, y
   347→    self.r = self.r or an:random_angle()
   348→    self.v = self.v or an:random_float(75, 150)
   349→    self.duration = self.duration or an:random_float(0.4, 0.6)
   350→    
   351→    self.main = self:add(spring('main', 1, 200, 10))
   352→    self.main:pull(0.5)
   353→    
   354→    self:tween(self.duration, self, {v = 0, sx = 0, sy = 0}, math.linear, function()
   355→        self:kill()
   356→    end)
   357→end
   358→
   359→function emoji_particle:update(dt)
   360→    self.x = self.x + self.v * math.cos(self.r) * dt
   361→    self.y = self.y + self.v * math.sin(self.r) * dt
   362→    effects:draw_image(self.emoji, self.x, self.y, self.r, self.sx * self.main.x, self.sy)
   363→end
   364→```
   365→
   366→Even rules-based code benefits from locality:
   367→
   368→```lua
   369→-- All mana logic together in one place

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   337→### Action-Based Objects
   338→
   339→Most game objects follow this pattern: create → configure → add behavior → add to tree.
   340→
   341→```lua
   342→-- Everything about this particle is RIGHT HERE
   343→emoji_particle = class:class_new(object)
   344→function emoji_particle:new(x, y, args)
   345→    self:object(nil, args)
   346→    self.x, self.y = x, y
   347→    self.r = self.r or an:random_angle()
   348→    self.v = self.v or an:random_float(75, 150)
   349→    self.duration = self.duration or an:random_float(0.4, 0.6)
   350→
   351→    self + timer()
   352→    self + spring('main', 1, 200, 10)
   353→    self.main:pull(0.5)
   354→
   355→    self.timer:tween(self.duration, self, {v = 0, sx = 0, sy = 0}, math.linear, function()
   356→        self:kill()
   357→    end)
   358→end
   359→
   360→function emoji_particle:update(dt)
   361→    self.x = self.x + self.v * math.cos(self.r) * dt
   362→    self.y = self.y + self.v * math.sin(self.r) * dt

593→object() ^ {x = 100} >> arena
   594→
   595→-- Named (arena.ball points to this, adding another 'ball' replaces it)
   596→object('ball') ^ {x = 100} >> arena
   597→```
   598→
   599→**Timers** are named via an optional second argument:
   600→```lua
   601→-- Anonymous
   602→self:after(0.5, function() self.can_shoot = true end)
   603→
   604→-- Named (self.flash points to this, can be killed/replaced)
   605→self:after(0.15, 'flash', function() self.flashing = false end)
   606→```
   607→
   608→**Actions** can use operators with the `X` helper for named, or methods:
   609→```lua
   610→-- Anonymous (operators without X)
   611→E() % early_fn / update_fn // late_fn >> arena
   612→

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   595→-- Named (arena.ball points to this, adding another 'ball' replaces it)
   596→object('ball') ^ {x = 100} >> arena
   597→```
   598→
   599→**Timer callbacks** are named via an optional second argument:
   600→```lua
   601→-- Anonymous
   602→self.timer:after(0.5, function() self.can_shoot = true end)
   603→
   604→-- Named (self.timer.flash points to this, can be killed/replaced)
   605→self.timer:after(0.15, 'flash', function() self.flashing = false end)
   606→```
   607→
   608→**Actions** can use operators with the `X` helper for named, or methods:
   609→```lua
   610→-- Anonymous (operators without X)

256:self:after(0.5, function() self:explode() end)                    -- Anonymous
257:self:after(0.15, 'flash', function() self.flashing = false end)   -- Named
260:self:tween(0.3, self, {x = 100}, math.cubic_out)
324:self:after(0.5, callback)               -- Timer as action
515:self:after(0.5, function() self.can_shoot = true end)
518:self:after(0.15, 'flash', function() self.flashing = false end)
524:self:after(0.15, 'flash', function() self.flashing = false end)
642:    self:after(0.15, 'flash', function()
655:    self:after(duration, 'stun_timer', function()

252→### Timers and Springs
   253→
   254→```lua
   255→-- Timers: after(duration, [name], callback)
   256→self:after(0.5, function() self:explode() end)                    -- Anonymous
   257→self:after(0.15, 'flash', function() self.flashing = false end)   -- Named
   258→
   259→-- Tween (provided by timer)
   260→self:tween(0.3, self, {x = 100}, math.cubic_out)
   261→
   262→-- Springs are child objects (each spring object IS one spring)
   263→self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping
   264→self.main:pull(0.5)
   265→
   266→-- Use spring in drawing
   267→game:push(self.x, self.y, 0, self.main.x, self.main.x)
   268→```
   269→
   270→### Death
   271→

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   248→    end
   249→end
   250→```
   251→
   252→### Timers and Springs
   253→
   254→```lua
   255→-- Timer is a child object
   256→self + timer()
   257→
   258→-- Timer methods: after(duration, [name], callback)
   259→self.timer:after(0.5, function() self:explode() end)                    -- Anonymous
   260→self.timer:after(0.15, 'flash', function() self.flashing = false end)   -- Named
   261→
   262→-- Tween (provided by timer)
   263→self.timer:tween(0.3, self, {x = 100}, math.cubic_out)
   264→
   265→-- Springs are child objects (each spring object IS one spring)
   266→self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping
   267→self.main:pull(0.5)
   268→
   269→-- Use spring in drawing
   270→game:push(self.x, self.y, 0, self.main.x, self.main.x)
   271→```
   272→
   273→### Death
   274→
   275→```lua

318→
   319→**Objects:** Lua tables in a tree. Have state, update, die. When parent dies, children die immediately.
   320→
   321→### Timers, Springs, Colliders
   322→
   323→These are **child objects**, not mixins. They die when their parent dies. No manual cleanup tracking.
   324→
   325→```lua
   326→-- Child object style
   327→self:after(0.5, callback)               -- Timer as action
   328→self + spring('main', 1, 200, 10)       -- Spring as child object
   329→self + collider('tag', 'dynamic', ...)  -- Collider as child object
   330→```
   331→
   332→### Layers

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   317→**Engine (`an`):** C-backed services. Physics, rendering, input, audio, RNG. Always available, don't die.
   318→
   319→**Objects:** Lua tables in a tree. Have state, update, die. When parent dies, children die immediately.
   320→
   321→### Timers, Springs, Colliders
   322→
   323→These are **child objects**, not mixins. They die when their parent dies. No manual cleanup tracking.
   324→
   325→```lua
   326→-- Child object style
   327→self + timer()                          -- Timer as child object
   328→self.timer:after(0.5, callback)         -- Use timer methods
   329→self + spring('main', 1, 200, 10)       -- Spring as child object
   330→self + collider('tag', 'dynamic', ...)  -- Collider as child object
   331→```
   332→
   333→### Layers
   334→
   335→Layers are **engine infrastructure**, created at startup. They're not tree objects. They don't die.

510→E() ^ {x = 100} >> arena
   511→
   512→-- Named (arena.ball points to this)
   513→E('ball') ^ {x = 100} >> arena
   514→```
   515→
   516→**Timers:**
   517→```lua
   518→-- Anonymous
   519→self:after(0.5, function() self.can_shoot = true end)
   520→
   521→-- Named (self.flash points to this, can be killed/replaced)
   522→self:after(0.15, 'flash', function() self.flashing = false end)
   523→
   524→-- Cancel
   525→if self.flash then self.flash:kill() end
   526→
   527→-- Replace (old 'flash' killed automatically)
   528→self:after(0.15, 'flash', function() self.flashing = false end)
   529→```
   530→
   531→**Actions:**
   532→```lua
   533→-- Anonymous (operators without X)
   534→E() % early_fn / update_fn // late_fn >> arena
   535→
   536→-- Named with X helper (enables cancellation)
   537→self / X('seek', fn)
   538→self % X('water_sim', fn)
   539→self // X('draw', fn)

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   512→-- Named (arena.ball points to this)
   513→E('ball') ^ {x = 100} >> arena
   514→```
   515→
   516→**Timer callbacks:**
   517→```lua
   518→-- Anonymous
   519→self.timer:after(0.5, function() self.can_shoot = true end)
   520→
   521→-- Named (self.timer.flash points to this, can be killed/replaced)
   522→self.timer:after(0.15, 'flash', function() self.flashing = false end)
   523→
   524→-- Cancel
   525→if self.timer.flash then self.timer.flash:kill() end
   526→
   527→-- Replace (old 'flash' killed automatically)
   528→self.timer:after(0.15, 'flash', function() self.flashing = false end)
   529→```
   530→
   531→**Actions:**
   532→```lua
   533→-- Anonymous (operators without X)

635→    end
   636→end
   637→```
   638→
   639→### Named Timers Pattern
   640→
   641→Use named timers when you need to cancel or replace an ongoing timer:
   642→
   643→```lua
   644→function enemy:flash()
   645→    self.flashing = true
   646→    self:after(0.15, 'flash', function()
   647→        self.flashing = false
   648→    end)
   649→end
   650→
   651→-- Calling flash() again replaces the old timer
   652→-- So rapid hits extend the flash rather than stacking callbacks
   653→
   654→function enemy:stun(duration)
   655→    -- Cancel any existing stun
   656→    if self.stun_timer then self.stun_timer:kill() end
   657→    
   658→    self.stunned = true
   659→    self:after(duration, 'stun_timer', function()
   660→        self.stunned = false
   661→    end)
   662→end
   663→```
   664→

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   635→    end
   636→end
   637→```
   638→
   639→### Named Timers Pattern
   640→
   641→Use named timer callbacks when you need to cancel or replace an ongoing timer:
   642→
   643→```lua
   644→function enemy:flash()
   645→    self.flashing = true
   646→    self.timer:after(0.15, 'flash', function()
   647→        self.flashing = false
   648→    end)
   649→end
   650→
   651→-- Calling flash() again replaces the old callback
   652→-- So rapid hits extend the flash rather than stacking callbacks
   653→
   654→function enemy:stun(duration)
   655→    -- Cancel any existing stun
   656→    if self.timer.stun then self.timer.stun:kill() end
   657→
   658→    self.stunned = true
   659→    self.timer:after(duration, 'stun', function()
   660→        self.stunned = false
   661→    end)
   662→end
   663→```
... [4 more lines]

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  1036→    else
  1037→      table.insert @late_actions, {fn: name_or_fn}
  1038→    @
  1039→  
  1040→  -- Operators
  1041→  __pow: (other) =>
  1042→    if type(other) == 'function'
  1043→      other @
  1044→    elseif type(other) == 'table'

docs/ANCHOR.md:506:               self:timer()
docs/ANCHOR.md:792:       @\timer!
docs/ANCHOR.md:891:          self:timer()
docs/ANCHOR.md:910:       @\timer!

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   500→```
   501→
   502→**With a function** — runs immediately (build/init):
   503→```lua
   504→object() ^ function(self)
   505→               self.x, self.y = 100, 200
   506→               self:add(timer())
   507→           end
   508→```
   509→
   510→### The Action Operators: `%`, `/`, `//`
   511→

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   786→```
   787→
   788→**With build function:**
   789→```yuescript
   790→E! ^ =>
   791→       @x, @y = 100, 200
   792→       @ + timer!
   793→   / (dt) =>
   794→       @x += 50 * dt
   795→       game\circle @x, @y, 10, color
   796→   >> arena

880→```
   881→
   882→### Side-by-Side Comparison
   883→
   884→**Lua (15 lines):**
   885→```lua
   886→E() ^ function(self)
   887→          self.x, self.y = x, y
   888→          self.v = an:random_float(50, 100)
   889→          self.r = an:random_angle()
   890→          self.duration = 0.5
   891→          self:timer()
   892→      end
   893→    / function(self, dt)
   894→          self.x = self.x + self.v * math.cos(self.r) * dt
   895→          self.y = self.y + self.v * math.sin(self.r) * dt
   896→          self.duration = self.duration - dt
   897→          if self.duration <= 0 then return true end
   898→          effects:circle(self.x, self.y, 3, color)
   899→      end
   900→    >> arena
   901→```
   902→
   903→**YueScript (13 lines):**
   904→```yuescript
   905→E! ^ =>
   906→       @x, @y = x, y
   907→       @v = an\random_float 50, 100
   908→       @r = an\random_angle!
   909→       @duration = 0.5
... [15 more lines]

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   880→```
   881→
   882→### Side-by-Side Comparison
   883→
   884→**Lua (14 lines):**
   885→```lua
   886→E() ^ function(self)
   887→          self.x, self.y = x, y
   888→          self.v = an:random_float(50, 100)
   889→          self.r = an:random_angle()
   890→          self.duration = 0.5
   891→      end
   892→    / function(self, dt)
   893→          self.x = self.x + self.v * math.cos(self.r) * dt
   894→          self.y = self.y + self.v * math.sin(self.r) * dt
   895→          self.duration = self.duration - dt
   896→          if self.duration <= 0 then return true end
   897→          effects:circle(self.x, self.y, 3, color)
   898→      end
   899→    >> arena
   900→```
   901→
   902→**YueScript (12 lines):**
   903→```yuescript
   904→E! ^ =>
   905→       @x, @y = x, y
   906→       @v = an\random_float 50, 100
   907→       @r = an\random_angle!
   908→       @duration = 0.5
... [12 more lines]

465:          self:timer()
492:   ^ function(self) self:timer() end
499:   ^ function(self) self:timer() end -- init after action, harder to follow
558:    self:timer()

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   459→```
   460→
   461→**With build function (for method calls):**
   462→```lua
   463→E() ^ function(self)
   464→          self.x, self.y = 100, 200
   465→          self:add(timer())
   466→      end
   467→    / function(self, dt)
   468→          game:circle(self.x, self.y, 10, color)
   469→      end
   470→    >> arena
   471→```
   472→
   473→**With multiple action phases:**
   474→```lua

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   486→```
   487→
   488→**Multiple `^` operators:** When chaining multiple `^`, group all initialization before action operators:
   489→```lua
   490→-- Good: all init together, then actions
   491→E() ^ {x = 100, y = 200}
   492→   ^ function(self) self:add(timer()) end
   493→   / function(self, dt) ... end
   494→   >> arena
   495→
   496→-- Bad: init split across the chain
   497→E() ^ {x = 100}
   498→   / function(self, dt) ... end
   499→   ^ function(self) self:add(timer()) end -- init after action, harder to follow
   500→   >> arena
   501→```
   502→
   503→### Named vs Anonymous
   504→

550→### Hierarchy Building with `+`
   551→
   552→Use the `+` operator to build object hierarchies declaratively (parent-centric style):
   553→
   554→```lua
   555→-- In constructor
   556→function arena:new(args)
   557→    self:object('arena', args)
   558→    self:timer()
   559→    
   560→    self + paddle('left', 30, 135)
   561→         + paddle('right', 450, 135)
   562→         + ball()
   563→         + { wall('top', 240, 5),
   564→             wall('bottom', 240, 265),
   565→             goal('left', -5, 135),
   566→             goal('right', 485, 135) }
   567→end
   568→
   569→-- Dynamically adding during gameplay

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   550→### Hierarchy Building with `+`
   551→
   552→Use the `+` operator to build object hierarchies declaratively (parent-centric style):
   553→
   554→```lua
   555→-- In constructor
   556→function arena:new(args)
   557→    self:object('arena', args)
   558→
   559→    self + timer()
   560→         + paddle('left', 30, 135)
   561→         + paddle('right', 450, 135)
   562→         + ball()
   563→         + { wall('top', 240, 5),
   564→             wall('bottom', 240, 265),
   565→             goal('left', -5, 135),
   566→             goal('right', 485, 135) }
   567→end
   568→
   569→-- Dynamically adding during gameplay
   570→function arena:spawn_enemy(x, y)
   571→    self + enemy(x, y)

website/context/ANCHOR.md:312:self:timer()
website/context/ANCHOR.md:509:               self:timer()
website/context/ANCHOR.md:795:       @\timer!
website/context/ANCHOR.md:894:          self:timer()
website/context/ANCHOR.md:913:       @\timer!
website/context/ANCHOR.md:1045:    @\timer! unless @timers
website/context/ANCHOR.md:1057:    @\timer! unless @timers
website/context/dungeon.yue:260:    @\timer!
website/context/dungeon.yue:408:    @\timer!
website/context/snkrx.yue:102:       @\timer!
website/context/snkrx.yue:124:       @\timer!
website/context/snkrx.yue:145:    @\timer!
website/context/snkrx.yue:196:    @\timer!
website/context/snkrx.yue:279:    @\timer!
website/context/snkrx.yue:423:    @\timer!
website/context/swarm_survival.yue:125:    @\timer!
website/context/swarm_survival.yue:162:    @\timer!
website/context/swarm_survival.yue:266:    @\timer!
website/context/swarm_survival.yue:324:    @\timer!
website/context/swarm_survival.yue:375:    @\timer!
website/context/swarm_survival.yue:483:    @\timer!
website/context/CLAUDE.md:461:          self:timer()
website/context/CLAUDE.md:488:   ^ function(self) self:timer() end
website/context/CLAUDE.md:495:   ^ function(self) self:timer() end -- init after action, harder to follow
website/context/CLAUDE.md:554:    self:timer()
website/files/Opus 4.5/ANCHOR.md:312:self:timer()
website/files/Opus 4.5/ANCHOR.md:509:               self:timer()
website/files/Opus 4.5/ANCHOR.md:795:       @\timer!
website/files/Opus 4.5/ANCHOR.md:894:          self:timer()
website/files/Opus 4.5/ANCHOR.md:913:       @\timer!
... [36 more lines]

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   258→```
   259→
   260→---
   261→
   262→## Colliders, Springs, and Timers
   263→
   264→Everything in Anchor is an object in the tree. Colliders, springs, and timers are objects with specialized functionality — they're added as children just like any other object and die when their parent dies.
   265→
   266→These are examples of **engine objects** — classes that wrap C-side resources (physics bodies, audio handles, etc.). All engine objects follow the same pattern:
   267→
   268→1. They're instantiated and added as children: `@ + timer()`
   269→2. They're named after themselves by default, so `timer()` creates an object with `name = 'timer'`
   270→3. The parent can access them via that name: `@timer:after(0.5, fn)`
   271→
   272→This applies to colliders, springs, timers, and any future engine objects.
   273→
   274→### Collider
   275→
   276→A collider object manages a Box2D physics body. Created via the `collider` factory function:

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   317→**Engine (`an`):** C-backed services. Physics, rendering, input, audio, RNG. Always available, don't die.
   318→
   319→**Objects:** Lua tables in a tree. Have state, update, die. When parent dies, children die immediately.
   320→
   321→### Timers, Springs, Colliders
   322→
   323→These are **engine objects** — child objects that wrap C-side resources. They die when their parent dies. No manual cleanup tracking.
   324→
   325→Engine objects are named after themselves by default, so `@ + timer()` creates a child named `'timer'`, accessible via `@timer`. This pattern applies to all engine objects (timers, springs, colliders, and any future ones).
   326→
   327→```lua
   328→-- Engine objects as children
   329→self + timer()                          -- Creates self.timer
   330→self.timer:after(0.5, callback)         -- Access via name
   331→self + spring('main', 1, 200, 10)       -- Named 'main', so self.main
   332→self + collider('player', 'dynamic', 'circle', 10)  -- Named 'collider', so self.collider
   333→```
   334→
   335→### Layers
   336→
   337→Layers are **engine infrastructure**, created at startup. They're not tree objects. They don't die.

480→- Tree operations: `add_child`, `remove_child`, `kill`
   481→- Tagging: `tag`, `is`, `all` / `A`
   482→- Links: `link` for horizontal dependencies
   483→- Operators: `^`, `%`, `/`, `//`, `+`, `>>`
   484→- `__inherited` hook to propagate operators to child classes
   485→
   486→**Ask developer before implementing details.**
   487→
   488→### 10.3 Timer Object
   489→- `after(delay, [name], callback)` — one-shot
   490→- `every(interval, [name], callback)` — repeating
   491→- `tween(duration, target, props, easing, [callback])` — interpolation
   492→- Named timers can be cancelled/replaced
   493→
   494→### 10.4 Spring Object
   495→- Constructor: `spring(name, initial, stiffness, damping)`
   496→- `pull(amount)` — displace from target
   497→- `.x` property — current value (updated each frame)
   498→
   499→### 10.5 Collider Object
   500→- Factory: `collider(tag, body_type, shape_type, ...)`
   501→- Wraps Box2D body
   502→- Methods: `get_position`, `set_velocity`, `apply_impulse`, etc.
   503→- Auto-destroys Box2D body on kill
   504→
   505→### 10.6 Update Loop Integration
   506→C calls into Lua each frame:
   507→1. Early phase — all `early_update` and `%` actions
   508→2. Main phase — all `update` and `/` actions
   509→3. Late phase — all `late_update` and `//` actions
... [10 more lines]

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   482→- Links: `link` for horizontal dependencies
   483→- Operators: `^`, `%`, `/`, `//`, `+`, `>>`
   484→- `__inherited` hook to propagate operators to child classes
   485→
   486→**Ask developer before implementing details.**
   487→
   488→### Engine Object Pattern
   489→
   490→Timer, spring, and collider are examples of **engine objects** — classes that wrap C-side resources. All engine objects follow this pattern:
   491→
   492→1. They extend the base `object` class
   493→2. They're instantiated and added as children: `@ + timer()`
   494→3. They're named after themselves by default (e.g., `timer()` has `name = 'timer'`)
   495→4. Parent accesses them via that name: `@timer:after(...)`
   496→5. They implement `destroy()` to clean up C-side resources when killed
   497→
   498→This pattern applies to any future engine objects (particles, audio sources, etc.).
   499→
   500→### 10.3 Timer Object
   501→- `after(delay, [name], callback)` — one-shot
   502→- `every(interval, [name], callback)` — repeating
   503→- `tween(duration, target, props, easing, [callback])` — interpolation
   504→- Named timers can be cancelled/replaced

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   507→- Constructor: `spring(name, initial, stiffness, damping)`
   508→- `pull(amount)` — displace from target
   509→- `.x` property — current value (updated each frame)
   510→
   511→### 10.5 Collider Object
   512→- Constructor: `collider(tag, body_type, shape_type, ...)`
   513→- Wraps Box2D body
   514→- Methods: `get_position`, `set_velocity`, `apply_impulse`, etc.
   515→- `destroy()` cleans up Box2D body when killed
   516→
   517→### 10.6 Update Loop Integration
   518→C calls into Lua each frame:
   519→1. Early phase — all `early_update` and `%` actions

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   270→3. The parent can access them via that name: `@timer:after(0.5, fn)`
   271→
   272→This applies to colliders, springs, timers, and any future engine objects.
   273→
   274→### Collider
   275→
   276→A collider object manages a Box2D physics body:
   277→
   278→```lua
   279→-- @ + collider(tag, body_type, shape_type, ...)
   280→self + collider('player', 'dynamic', 'circle', 12)

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   290→- `apply_impulse(ix, iy)`
   291→
   292→When killed, automatically destroys the Box2D body.
   293→
   294→### Spring
   295→
   296→A spring object provides damped spring animation:
   297→
   298→```lua
   299→-- Each spring object IS a spring
   300→self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping

User has answered your questions: "Engine objects are 'named after themselves by default', but spring('main', ...) takes an explicit name as first arg, while collider('player', ...) uses 'player' as physics tag, not tree name. How should this work?"="This is because the "spring" object was actually multiple springs internally, and the user could then access each one individually. This will be different in new Anchor, as if you want to have multiple springs you just create multiple springs and have them as children. By default, each spring is named "spring", but if you want to have multiple then it can also take its name as an argument. So every time you see spring('main') and it's the only spring, that's wrong, unless the code explicitly wants a spring named 'main', which usually isn't the case since self.spring is way more understandable than self.main. But in cases where there are multiple springs, you'd want @ + spring('attack'), @ + spring('hit') and so on.". You can now continue with the user's answers in mind.

docs/ANCHOR.md:300:self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping
docs/ANCHOR.md:301:self + spring('shoot', 1, 300, 15)
docs/ANCHOR.md:360:    self + spring('main', 1, 200, 10)

296→A spring object provides damped spring animation:
   297→
   298→```lua
   299→-- Each spring object IS a spring
   300→self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping
   301→self + spring('shoot', 1, 300, 15)
   302→
   303→-- Usage
   304→self.main:pull(0.5)   -- Displace from target
   305→self.main.x           -- Current value (updated each frame)
   306→```
   307→
   308→Each spring object represents one spring with its own value.
   309→
   310→### Timer
   311→
   312→A timer object provides delayed and repeating callbacks, plus tweening. Add a timer as a child, then call its methods:
   313→
   314→```lua
   315→-- Add timer child (typically in constructor)

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   292→When killed, automatically destroys the Box2D body.
   293→
   294→### Spring
   295→
   296→A spring object provides damped spring animation:
   297→
   298→```lua
   299→-- Single spring (defaults to name 'spring')
   300→self + spring(1, 200, 10)   -- initial, stiffness, damping
   301→self.spring:pull(0.5)       -- Displace from target
   302→self.spring.x               -- Current value (updated each frame)
   303→
   304→-- Multiple springs (explicit names)
   305→self + spring('attack', 1, 200, 10)
   306→self + spring('hit', 1, 300, 15)
   307→self.attack:pull(0.5)
   308→self.hit:pull(0.3)
   309→```
   310→
   311→Each spring object represents one spring with its own value.
   312→
   313→### Timer
   314→
   315→A timer object provides delayed and repeating callbacks, plus tweening. Add a timer as a child, then call its methods:

355→function emoji_particle:new(x, y, args)
   356→    self:object(nil, args)
   357→    self.x, self.y = x, y
   358→    self.r = self.r or an:random_angle()
   359→    self.v = self.v or an:random_float(75, 150)
   360→    self.duration = self.duration or an:random_float(0.4, 0.6)
   361→
   362→    self + timer()
   363→    self + spring('main', 1, 200, 10)
   364→    self.main:pull(0.5)
   365→
   366→    self.timer:tween(self.duration, self, {v = 0, sx = 0, sy = 0}, math.linear, function()
   367→        self:kill()
   368→    end)
   369→end
   370→
   371→function emoji_particle:update(dt)
   372→    self.x = self.x + self.v * math.cos(self.r) * dt
   373→    self.y = self.y + self.v * math.sin(self.r) * dt
   374→    effects:draw_image(self.emoji, self.x, self.y, self.r, self.sx * self.main.x, self.sy)
   375→end
   376→```
   377→
   378→Even rules-based code benefits from locality:
   379→

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   358→    self.r = self.r or an:random_angle()
   359→    self.v = self.v or an:random_float(75, 150)
   360→    self.duration = self.duration or an:random_float(0.4, 0.6)
   361→
   362→    self + timer()
   363→    self + spring(1, 200, 10)
   364→    self.spring:pull(0.5)
   365→
   366→    self.timer:tween(self.duration, self, {v = 0, sx = 0, sy = 0}, math.linear, function()
   367→        self:kill()
   368→    end)
   369→end
   370→
   371→function emoji_particle:update(dt)
   372→    self.x = self.x + self.v * math.cos(self.r) * dt
   373→    self.y = self.y + self.v * math.sin(self.r) * dt
   374→    effects:draw_image(self.emoji, self.x, self.y, self.r, self.sx * self.spring.x, self.sy)
   375→end
   376→```
   377→
   378→Even rules-based code benefits from locality:
   379→

.claude/CLAUDE.md:200:    self + spring('main', 1, 200, 10)
.claude/CLAUDE.md:206:    game:push(self.x, self.y, 0, self.main.x, self.main.x)
.claude/CLAUDE.md:266:self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping
.claude/CLAUDE.md:267:self.main:pull(0.5)
.claude/CLAUDE.md:270:game:push(self.x, self.y, 0, self.main.x, self.main.x)
.claude/CLAUDE.md:331:self + spring('main', 1, 200, 10)       -- Named 'main', so self.main
docs/ANCHOR.md:305:self + spring('attack', 1, 200, 10)
docs/ANCHOR.md:306:self + spring('hit', 1, 300, 15)
docs/ANCHOR.md:410:    game:push(self.x, self.y, self.r, self.main.x, self.main.x)
docs/ANCHOR.md:857:      game\push @x, @y, 0, @main.x, @main.x
website/context/ANCHOR.md:296:self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping
website/context/ANCHOR.md:297:self + spring('shoot', 1, 300, 15)
website/context/ANCHOR.md:300:self.main:pull(0.5)   -- Displace from target
website/context/ANCHOR.md:301:self.main.x           -- Current value (updated each frame)
website/context/ANCHOR.md:355:    self.main = self:add(spring('main', 1, 200, 10))
website/context/ANCHOR.md:356:    self.main:pull(0.5)
website/context/ANCHOR.md:366:    effects:draw_image(self.emoji, self.x, self.y, self.r, self.sx * self.main.x, self.sy)
website/context/ANCHOR.md:402:    game:push(self.x, self.y, self.r, self.main.x, self.main.x)
website/context/ANCHOR.md:849:      game\push @x, @y, 0, @main.x, @main.x
website/context/CLAUDE.md:200:    self + spring('main', 1, 200, 10)
website/context/CLAUDE.md:206:    game:push(self.x, self.y, 0, self.main.x, self.main.x)
website/context/CLAUDE.md:263:self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping
website/context/CLAUDE.md:264:self.main:pull(0.5)
website/context/CLAUDE.md:267:game:push(self.x, self.y, 0, self.main.x, self.main.x)
website/context/CLAUDE.md:325:self + spring('main', 1, 200, 10)       -- Spring as child object
website/files/Opus 4.5/ANCHOR.md:296:self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping
website/files/Opus 4.5/ANCHOR.md:297:self + spring('shoot', 1, 300, 15)
website/files/Opus 4.5/ANCHOR.md:300:self.main:pull(0.5)   -- Displace from target
website/files/Opus 4.5/ANCHOR.md:301:self.main.x           -- Current value (updated each frame)
website/files/Opus 4.5/ANCHOR.md:355:    self.main = self:add(spring('main', 1, 200, 10))
... [18 more lines]

195→    self:object('thing', args)
   196→    self.x, self.y = x, y
   197→    
   198→    -- Add children
   199→    self + collider('thing', 'dynamic', 'circle', 10)
   200→    self + spring('main', 1, 200, 10)
   201→end
   202→
   203→function thing:update(dt)
   204→    self.x, self.y = self.collider:get_position()
   205→    
   206→    game:push(self.x, self.y, 0, self.main.x, self.main.x)
   207→        game:circle(self.x, self.y, 10, self.color)
   208→    game:pop()
   209→end
   210→```
   211→
   212→### Inline Objects
   213→
   214→```lua
   215→-- With operators and single-letter alias
   216→E() ^ {x = 100, y = 100}
   217→   / function(self, dt)
   218→         self.x = self.x + 50 * dt
   219→         game:circle(self.x, self.y, 10, color)

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   194→function thing:new(x, y, args)
   195→    self:object('thing', args)
   196→    self.x, self.y = x, y
   197→    
   198→    -- Add children
   199→    self + collider('thing', 'dynamic', 'circle', 10)
   200→    self + spring(1, 200, 10)
   201→end
   202→
   203→function thing:update(dt)
   204→    self.x, self.y = self.collider:get_position()
   205→
   206→    game:push(self.x, self.y, 0, self.spring.x, self.spring.x)
   207→        game:circle(self.x, self.y, 10, self.color)
   208→    game:pop()
   209→end
   210→```
   211→
   212→### Inline Objects
   213→

260→self.timer:after(0.15, 'flash', function() self.flashing = false end)   -- Named
   261→
   262→-- Tween (provided by timer)
   263→self.timer:tween(0.3, self, {x = 100}, math.cubic_out)
   264→
   265→-- Springs are child objects (each spring object IS one spring)
   266→self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping
   267→self.main:pull(0.5)
   268→
   269→-- Use spring in drawing
   270→game:push(self.x, self.y, 0, self.main.x, self.main.x)
   271→```
   272→
   273→### Death
   274→
   275→```lua
   276→-- kill() recursively sets .dead = true on self and all children
   277→-- Actual removal happens at end-of-frame
   278→self:kill()
   279→```

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   261→
   262→-- Tween (provided by timer)
   263→self.timer:tween(0.3, self, {x = 100}, math.cubic_out)
   264→
   265→-- Springs are child objects (each spring object IS one spring)
   266→self + spring(1, 200, 10)   -- initial, stiffness, damping (defaults to name 'spring')
   267→self.spring:pull(0.5)
   268→
   269→-- Use spring in drawing
   270→game:push(self.x, self.y, 0, self.spring.x, self.spring.x)
   271→```
   272→
   273→### Death
   274→

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   323→These are **engine objects** — child objects that wrap C-side resources. They die when their parent dies. No manual cleanup tracking.
   324→
   325→Engine objects are named after themselves by default, so `@ + timer()` creates a child named `'timer'`, accessible via `@timer`. This pattern applies to all engine objects (timers, springs, colliders, and any future ones).
   326→
   327→```lua
   328→-- Engine objects as children (default names)
   329→self + timer()                          -- Creates self.timer
   330→self + spring(1, 200, 10)               -- Creates self.spring
   331→self + collider('player', 'dynamic', 'circle', 10)  -- Creates self.collider
   332→
   333→-- Multiple of same type (explicit names)
   334→self + spring('attack', 1, 200, 10)     -- Creates self.attack
   335→self + spring('hit', 1, 300, 15)        -- Creates self.hit
   336→```
   337→
   338→### Layers
   339→
   340→Layers are **engine infrastructure**, created at startup. They're not tree objects. They don't die.

405→function player:update(dt)
   406→    -- Update logic
   407→    self.x, self.y = self.collider:get_position()
   408→    
   409→    -- Drawing to game layer
   410→    game:push(self.x, self.y, self.r, self.main.x, self.main.x)
   411→        game:circle(self.x, self.y, 10, self.color)
   412→    game:pop()
   413→    
   414→    -- Drawing to effects layer
   415→    if self.flashing then
   416→        effects:circle(self.x, self.y, 15, colors.white)
   417→    end
   418→end
   419→```

850→    
   851→    -- Anonymous action (always runs)
   852→    @ / (dt) =>
   853→      @x, @y = @collider\get_position!
   854→    
   855→    -- Named late action for drawing
   856→    @ // X 'draw', (dt) =>
   857→      game\push @x, @y, 0, @main.x, @main.x
   858→      game\circle @x, @y, 12, colors.green
   859→      game\pop!
   860→```
   861→
   862→**Query with A (alias for all):**
   863→```yuescript
   864→-- Iterate with * syntax

830→@water_sim\kill!
   831→```
   832→
   833→**Player example:**
   834→```yuescript
   835→class player extends object
   836→  new: (x, y, args) =>
   837→    super 'player', args
   838→    @x, @y = x, y
   839→    
   840→    -- Add collider and springs as children
   841→    @ + collider 'player', 'dynamic', 'circle', 12
   842→    @ + spring 'main', 1, 200, 10
   843→    @ + spring 'shoot', 1, 300, 15
   844→    
   845→    -- Named action for input
   846→    @ / X 'input', (dt) =>
   847→      return if @stunned
   848→      @vx = -@speed if an\is_down 'left'
   849→      @vx = @speed if an\is_down 'right'
   850→    
   851→    -- Anonymous action (always runs)
   852→    @ / (dt) =>
   853→      @x, @y = @collider\get_position!
   854→    
   855→    -- Named late action for drawing
   856→    @ // X 'draw', (dt) =>
   857→      game\push @x, @y, 0, @main.x, @main.x
   858→      game\circle @x, @y, 12, colors.green
   859→      game\pop!
... [5 more lines]

398→---
   399→
   400→## Drawing
   401→
   402→Objects draw themselves in their update function. Drawing is decoupled from tree structure — an object can draw to any layer.
   403→
   404→```lua
   405→function player:update(dt)
   406→    -- Update logic
   407→    self.x, self.y = self.collider:get_position()
   408→    
   409→    -- Drawing to game layer
   410→    game:push(self.x, self.y, self.r, self.main.x, self.main.x)
   411→        game:circle(self.x, self.y, 10, self.color)
   412→    game:pop()
   413→    
   414→    -- Drawing to effects layer
   415→    if self.flashing then
   416→        effects:circle(self.x, self.y, 15, colors.white)
   417→    end
   418→end
   419→```
   420→
   421→Draw order within a layer is determined by submission order (the order Lua calls draw functions), not tree order.
   422→

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   400→## Drawing
   401→
   402→Objects draw themselves in their update function. Drawing is decoupled from tree structure — an object can draw to any layer.
   403→
   404→```lua
   405→function player:update(dt)
   406→    -- Update logic
   407→    self.x, self.y = self.collider:get_position()
   408→
   409→    -- Drawing to game layer (spring used for scale)
   410→    game:push(self.x, self.y, self.r, self.spring.x, self.spring.x)
   411→        game:circle(self.x, self.y, 10, self.color)
   412→    game:pop()
   413→
   414→    -- Drawing to effects layer
   415→    if self.flashing then
   416→        effects:circle(self.x, self.y, 15, colors.white)
   417→    end
   418→end
   419→```
   420→
   421→Draw order within a layer is determined by submission order (the order Lua calls draw functions), not tree order.
   422→
   423→---

docs/ANCHOR.md:857:      game\push @x, @y, 0, @main.x, @main.x

No matches found

504→- Named timers can be cancelled/replaced
   505→
   506→### 10.4 Spring Object
   507→- Constructor: `spring(name, initial, stiffness, damping)`
   508→- `pull(amount)` — displace from target
   509→- `.x` property — current value (updated each frame)
   510→
   511→### 10.5 Collider Object
   512→- Constructor: `collider(tag, body_type, shape_type, ...)`
   513→- Wraps Box2D body

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   502→- `every(interval, [name], callback)` — repeating
   503→- `tween(duration, target, props, easing, [callback])` — interpolation
   504→- Named timers can be cancelled/replaced
   505→
   506→### 10.4 Spring Object
   507→- Constructor: `spring([name], initial, stiffness, damping)` — name optional, defaults to 'spring'
   508→- `pull(amount)` — displace from target
   509→- `.x` property — current value (updated each frame)
   510→
   511→### 10.5 Collider Object
   512→- Constructor: `collider(tag, body_type, shape_type, ...)`
   513→- Wraps Box2D body

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   496→5. They implement `destroy()` to clean up C-side resources when killed
   497→
   498→This pattern applies to any future engine objects (particles, audio sources, etc.).
   499→
   500→### 10.3 Timer Object
   501→- Constructor: `timer([name])` — name optional, defaults to 'timer'
   502→- `after(delay, [name], callback)` — one-shot
   503→- `every(interval, [name], callback)` — repeating
   504→- `tween(duration, target, props, easing, [callback])` — interpolation
   505→- Named callbacks can be cancelled/replaced
   506→
   507→### 10.4 Spring Object
   508→- Constructor: `spring([name], initial, stiffness, damping)` — name optional, defaults to 'spring'
   509→- `pull(amount)` — displace from target

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   508→- Constructor: `spring([name], initial, stiffness, damping)` — name optional, defaults to 'spring'
   509→- `pull(amount)` — displace from target
   510→- `.x` property — current value (updated each frame)
   511→
   512→### 10.5 Collider Object
   513→- Constructor: `collider([name], tag, body_type, shape_type, ...)` — name optional, defaults to 'collider'
   514→- Wraps Box2D body
   515→- Methods: `get_position`, `set_velocity`, `apply_impulse`, etc.
   516→- `destroy()` cleans up Box2D body when killed
   517→
   518→### 10.6 Update Loop Integration
   519→C calls into Lua each frame:
   520→1. Early phase — all `early_update` and `%` actions

docs/ANCHOR.md:279:-- @ + collider(tag, body_type, shape_type, ...)
docs/ANCHOR.md:280:self + collider('player', 'dynamic', 'circle', 12)
docs/ANCHOR.md:281:self + collider('wall', 'static', 'rectangle', 100, 20)
docs/ANCHOR_IMPLEMENTATION_PLAN.md:513:- Constructor: `collider([name], tag, body_type, shape_type, ...)` — name optional, defaults to 'collider'

User has answered your questions: "For collider, should the physics tag also serve as the tree name, or should there be a separate optional name parameter?"="Separate optional name". You can now continue with the user's answers in mind.

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   272→This applies to colliders, springs, timers, and any future engine objects.
   273→
   274→### Collider
   275→
   276→A collider object manages a Box2D physics body:
   277→
   278→```lua
   279→-- Single collider (defaults to name 'collider')
   280→self + collider('player', 'dynamic', 'circle', 12)  -- tag, body_type, shape_type, ...
   281→self.collider:get_position()
   282→
   283→-- Multiple colliders (explicit names)
   284→self + collider('hitbox', 'player', 'dynamic', 'circle', 12)
   285→self + collider('hurtbox', 'player_hurt', 'dynamic', 'circle', 20)
   286→self.hitbox:get_position()
   287→self.hurtbox:get_position()
   288→```
   289→
   290→Methods:
   291→- `get_position()` → x, y

docs/ANCHOR.md:847:    @ + collider 'player', 'dynamic', 'circle', 12
docs/ANCHOR.md:1128:    @ + collider 'player', 'dynamic', 'circle', 12
docs/ANCHOR.md:1215:@ + collider 'player', 'dynamic', 'circle', 12
website/context/ANCHOR.md:833:    @ + collider 'player', 'dynamic', 'circle', 12
website/context/ANCHOR.md:1141:    @ + collider 'player', 'dynamic', 'circle', 12
website/context/ANCHOR.md:1228:@ + collider 'player', 'dynamic', 'circle', 12
website/context/IMPLEMENTATION_PLAN.md:423:-- Factory functions use operators: @ + collider 'tag', 'dynamic', 'circle', 12
website/files/Opus 4.5/ANCHOR.md:833:    @ + collider 'player', 'dynamic', 'circle', 12
website/files/Opus 4.5/ANCHOR.md:1141:    @ + collider 'player', 'dynamic', 'circle', 12
website/files/Opus 4.5/ANCHOR.md:1228:@ + collider 'player', 'dynamic', 'circle', 12
website/files/Opus 4.5/IMPLEMENTATION_PLAN.md:425:-- Factory functions use operators: @ + collider 'tag', 'dynamic', 'circle', 12
website/files/Opus 4.5/IMPLEMENTATION_PLAN.md:457:    @ + collider 'wall', 'static', 'rect', 0, 0, w, 10      -- top
website/files/Opus 4.5/IMPLEMENTATION_PLAN.md:458:    @ + collider 'wall', 'static', 'rect', 0, h-10, w, 10   -- bottom
website/files/Opus 4.5/IMPLEMENTATION_PLAN.md:459:    @ + collider 'wall', 'static', 'rect', 0, 0, 10, h      -- left
website/files/Opus 4.5/IMPLEMENTATION_PLAN.md:460:    @ + collider 'wall', 'static', 'rect', w-10, 0, 10, h   -- right
website/logs/2026-01-03_12-30.md:4808:   457→    @ + collider 'wall', 'static', 'rect', 0, 0, w, 10      -- top
website/logs/2026-01-03_12-30.md:4809:   458→    @ + collider 'wall', 'static', 'rect', 0, h-10, w, 10   -- bottom
website/logs/2026-01-03_12-30.md:4810:   459→    @ + collider 'wall', 'static', 'rect', 0, 0, 10, h      -- left
website/logs/2026-01-03_12-30.md:4811:   460→    @ + collider 'wall', 'static', 'rect', w-10, 0, 10, h   -- right

.claude/CLAUDE.md:199:    self + collider('thing', 'dynamic', 'circle', 10)
.claude/CLAUDE.md:331:self + collider('player', 'dynamic', 'circle', 10)  -- Creates self.collider

docs/ANCHOR_IMPLEMENTATION_PLAN.md:493:2. They're instantiated and added as children: `@ + timer()`
docs/ANCHOR_IMPLEMENTATION_PLAN.md:494:3. They're named after themselves by default (e.g., `timer()` has `name = 'timer'`)
docs/ANCHOR_IMPLEMENTATION_PLAN.md:501:- Constructor: `timer([name])` — name optional, defaults to 'timer'
docs/ANCHOR_IMPLEMENTATION_PLAN.md:508:- Constructor: `spring([name], initial, stiffness, damping)` — name optional, defaults to 'spring'
docs/ANCHOR_IMPLEMENTATION_PLAN.md:513:- Constructor: `collider([name], tag, body_type, shape_type, ...)` — name optional, defaults to 'collider'
docs/ANCHOR.md:268:1. They're instantiated and added as children: `@ + timer()`
docs/ANCHOR.md:269:2. They're named after themselves by default, so `timer()` creates an object with `name = 'timer'`
docs/ANCHOR.md:280:self + collider('player', 'dynamic', 'circle', 12)  -- tag, body_type, shape_type, ...
docs/ANCHOR.md:284:self + collider('hitbox', 'player', 'dynamic', 'circle', 12)
docs/ANCHOR.md:285:self + collider('hurtbox', 'player_hurt', 'dynamic', 'circle', 20)
docs/ANCHOR.md:306:self + spring(1, 200, 10)   -- initial, stiffness, damping
docs/ANCHOR.md:311:self + spring('attack', 1, 200, 10)
docs/ANCHOR.md:312:self + spring('hit', 1, 300, 15)
docs/ANCHOR.md:325:self + timer()
docs/ANCHOR.md:368:    self + timer()
docs/ANCHOR.md:369:    self + spring(1, 200, 10)
docs/ANCHOR.md:523:               self:add(timer())
docs/ANCHOR.md:748:    :timer()

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743→
   744→```lua
   745→object('player')
   746→    :set({x = 100, y = 200, hp = 100, speed = 150})
   747→    :tag('friendly', 'controllable')
   748→    :timer()
   749→```
   750→
   751→---
   752→
   753→## YueScript Alternative
   754→
   755→*YueScript (evolved from MoonScript) is a language that compiles to Lua. It offers significant syntactic improvements: significant whitespace, `@` for self, `=>` for methods with implicit self, no `end` keywords, `+=`/`-=` operators, and optional parentheses. The operator-based object construction style fits YueScript's aesthetic particularly well.*
   756→
   757→### Single-Letter Aliases in YueScript

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   740→### The `set()` Function
   741→
   742→`object:set(table)` assigns all key-value pairs from the table to the object and returns self for chaining:
   743→
   744→```lua
   745→object('player')
   746→    :set({x = 100, y = 200, hp = 100, speed = 150})
   747→    :tag('friendly', 'controllable')
   748→```
   749→
   750→---
   751→
   752→## YueScript Alternative

No matches found

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1→# Anchor Implementation Plan
     2→
     3→C engine with YueScript scripting, OpenGL rendering, targeting Windows, Linux, and Web.
     4→
     5→---
     6→
     7→## Summary of Key Decisions
     8→
     9→| Area | Decision | Rationale |
    10→|------|----------|-----------|
    11→| Renderer | OpenGL | Smooth rotation, additive blending, performance headroom, console-portable |
    12→| Audio | TBD (miniaudio or SoLoud) | Need pitch shifting; SDL_mixer insufficient |
    13→| Physics | Box2D 3.1 | Already used, true ball-to-ball collisions needed |
    14→| Scripting | Lua 5.4 + YueScript | Build-time compilation with `-r` flag for line numbers |
    15→| Timestep | Fixed 60fps | Determinism matters for potential replay support |
    16→| Resolution | Per-game configurable | 480×270, 640×360, or custom; integer scaling |
    17→| C Structure | Single anchor.c | Monolithic file, easier navigation |
    18→| Resources | Live forever | Games are small enough; no unloading needed |
    19→| Distribution | Single executable | Assets embedded |
    20→
    21→---
    22→
    23→## Build Strategy
    24→
    25→### YueScript Compilation
    26→
    27→**Build-time compilation** — compile `.yue` → `.lua` during build, not at runtime.
    28→
    29→```
    30→game.yue ──► yue -r ──► game.lua ──► embedded in executable
... [580 more lines]

1→# Anchor Engine Specification
     2→
     3→*Anchor is a 2D game engine built around locality of behavior and minimal cognitive overhead. Code that belongs together stays together.*
     4→
     5→---
     6→
     7→## Table of Contents
     8→
     9→1. [Core Philosophy](#core-philosophy)
    10→2. [The Object Tree](#the-object-tree)
    11→3. [Lifecycle](#lifecycle)
    12→4. [Colliders, Springs, and Timers](#colliders-springs-and-timers)
    13→5. [Locality of Behavior](#locality-of-behavior)
    14→6. [Drawing](#drawing)
    15→7. [Lua Syntax Features](#lua-syntax-features)
    16→8. [YueScript Alternative](#yuescript-alternative)
    17→9. [YueScript Class System Integration](#yuescript-class-system-integration)
    18→10. [Technology Stack](#technology-stack)
    19→11. [Rendering](#rendering)
    20→12. [Error Handling](#error-handling)
    21→13. [Build and Distribution](#build-and-distribution)
    22→14. [File Structure](#file-structure)
    23→15. [Performance Path](#performance-path)
    24→16. [Deferred Features](#deferred-features)
    25→
    26→---
    27→
    28→## Core Philosophy
    29→
    30→### Locality of Behavior
... [1386 more lines]

1→# CLAUDE.md
     2→
     3→Guidelines for Claude Code instances working on Anchor and games built with it.
     4→
     5→---
     6→
     7→## Read First
     8→
     9→Read `docs/ANCHOR.md` before doing anything. It covers:
    10→- The object tree model (tree-based ownership, automatic cleanup)
    11→- How objects, timers, springs, and colliders work
    12→- The action-based vs rules-based spectrum
    13→- Technical implementation details (OpenGL rendering, Box2D physics)
    14→
    15→**For the reasoning behind these decisions** — why the engine works the way it does, how to evaluate new features, the developer's working style — see the [Anchor Context Brief](#anchor-context-brief) at the end of this document.
    16→
    17→---
    18→
    19→## Session Workflow
    20→
    21→**Every Claude Code session follows this workflow.**
    22→
    23→### During Session
    24→
    25→- Work normally on requested tasks
    26→- Update `docs/ANCHOR.md` when APIs or architecture changes
    27→- Update `docs/ANCHOR_IMPLEMENTATION_PLAN.md` when tasks are completed
    28→- Update this file (`CLAUDE.md`) when new patterns or conventions are established
    29→
    30→### End of Session
... [879 more lines]

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   964→    if args
   965→      for k, v in pairs args
   966→        @[k] = v
   967→  
   968→  -- Tree operations
   969→  add: (child) =>
   970→    table.insert @children, child
   971→    child.parent = @
   972→    -- Create named links
   973→    if child.name
   974→      @[child.name] = child
   975→    if @name
   976→      child[@name] = @
   977→    @
   978→
   979→  remove: (child) =>
   980→    for i, c in ipairs @children
   981→      if c == child
   982→        table.remove @children, i
   983→        break
   984→    child.parent = nil
   985→    if child.name
   986→      @[child.name] = nil
   987→  
   988→  -- Tagging
   989→  tag: (...) =>
   990→    for t in *{...}

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  1083→      name, fn = next other
  1084→      @\late_action name, fn if type(name) == 'string' and type(fn) == 'function'
  1085→    @
  1086→  
  1087→  __add: (other) =>
  1088→    if type(other) == 'table'
  1089→      if other.name != nil or other.children != nil  -- It's an object
  1090→        @\add other
  1091→      else  -- It's an array
  1092→        for child in *other
  1093→          @\add child
  1094→    @
  1095→
  1096→  __shr: (other) =>
  1097→    other\add @
  1098→    other  -- Returns PARENT
  1099→
  1100→-- Set up aliases
  1101→E = object
  1102→X = (name, fn) -> {[name]: fn}

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   462→-- Later: arena.ball exists
   463→-- Adding another 'ball' kills the old one
   464→```
   465→
   466→**With build function (for method calls):**
   467→```lua
   468→E() ^ function(self)
   469→          self.x, self.y = 100, 200
   470→          self + timer()
   471→      end
   472→    / function(self, dt)
   473→          game:circle(self.x, self.y, 10, color)
   474→      end
   475→    >> arena
   476→```
   477→
   478→**With multiple action phases:**
   479→```lua
   480→E() ^ {x = 100, y = 200}

File created successfully at: /home/adn/a327ex/Anchor/yue/operator_comparison.yue

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     1→-- Operator Comparison: A for object, E for early, L for late
     2→--
     3→-- New assignments:
     4→--   A = object (was E)
     5→--   E = early action
     6→--   L = late action
     7→--   X = named action (unchanged)
     8→--
     9→-- Note: A was previously the alias for all().
    10→-- Would need to use full @\all 'tag' or pick new letter for query.
    11→
    12→--------------------------------------------------------------------------------
    13→-- SIMPLE INLINE OBJECTS
    14→--------------------------------------------------------------------------------
    15→
    16→-- Anonymous particle
    17→A! ^ {x: 100, y: 100, v: 50}
    18→   / (dt) =>
    19→       @x += @v * dt
    20→       game\circle @x, @y, 5, colors.white
    21→   >> arena
    22→
    23→-- Named ball (arena.ball points to this)
    24→A 'ball' ^ {x: 240, y: 135, vx: 100, vy: 100}
    25→          / (dt) =>
    26→              @x += @vx * dt
    27→              @y += @vy * dt
    28→              game\circle @x, @y, 8, an.colors.white
    29→          >> arena
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     1→-- Operator Comparison: Y for object, E for early, L for late
     2→--
     3→-- New assignments:
     4→--   Y = object
     5→--   E = early action
     6→--   L = late action
     7→--   X = named action (unchanged)
     8→--   A = all() query (unchanged)
     9→
    10→--------------------------------------------------------------------------------
    11→-- SIMPLE INLINE OBJECTS
    12→--------------------------------------------------------------------------------

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    10→--------------------------------------------------------------------------------
    11→-- SIMPLE INLINE OBJECTS
    12→--------------------------------------------------------------------------------
    13→
    14→-- Anonymous particle
    15→Y! ^ {x: 100, y: 100, v: 50}
    16→   / (dt) =>
    17→       @x += @v * dt
    18→       game\circle @x, @y, 5, colors.white
    19→   >> arena
    20→
    21→-- Named ball (arena.ball points to this)
    22→Y 'ball' ^ {x: 240, y: 135, vx: 100, vy: 100}
    23→          / (dt) =>
    24→              @x += @vx * dt
    25→              @y += @vy * dt
    26→              game\circle @x, @y, 8, an.colors.white
    27→          >> arena
    28→
    29→
    30→--------------------------------------------------------------------------------
    31→-- ALL THREE PHASES

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    30→--------------------------------------------------------------------------------
    31→-- ALL THREE PHASES
    32→--------------------------------------------------------------------------------
    33→
    34→-- Particle with early/main/late
    35→Y 'particle' ^ {x: 100, y: 100, v: 50, r: 0}
    36→   / E (dt) =>
    37→       -- early: physics prep, input gathering
    38→       @r = math.atan2 @target.y - @y, @target.x - @x
    39→   / (dt) =>
    40→       -- main: logic
    41→       @x += @v * math.cos(@r) * dt
    42→       @y += @v * math.sin(@r) * dt
    43→   / L (dt) =>
    44→       -- late: drawing
    45→       game\circle @x, @y, 5, colors.white
    46→   >> arena
    47→
    48→
    49→--------------------------------------------------------------------------------
    50→-- CLASS-BASED OBJECTS

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   111→      + paddle 'left', 30, 135
   112→      + paddle 'right', 450, 135
   113→      + { wall 'top', wall 'bottom' }
   114→
   115→-- Inline object in hierarchy (needs parens)
   116→arena + paddle 'left', 30, 135
   117→      + paddle 'right', 450, 135
   118→      + (Y 'ball' ^ {x: 240, y: 135}
   119→                  / (dt) =>
   120→                      @x += @vx * dt
   121→                      game\circle @x, @y, 8, colors.white)
   122→
   123→
   124→--------------------------------------------------------------------------------
   125→-- SPAWNING PATTERNS

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   124→--------------------------------------------------------------------------------
   125→-- SPAWNING PATTERNS
   126→--------------------------------------------------------------------------------
   127→
   128→class arena extends object
   129→  spawn_ball: =>
   130→    Y 'ball' ^ {x: 240, y: 135, vx: 100, vy: 100}
   131→             / (dt) =>
   132→                 @x += @vx * dt
   133→                 @y += @vy * dt
   134→                 game\circle @x, @y, 8, an.colors.white
   135→             >> @
   136→    -- @ball now exists, old ball auto-killed if existed
   137→
   138→  spawn_particle: (x, y) =>
   139→    Y! ^ {x: x, y: y, v: an\random_float 50, 100, r: an\random_angle!, duration: 0.5}
   140→       / (dt) =>
   141→           @x += @v * math.cos(@r) * dt
   142→           @y += @v * math.sin(@r) * dt
   143→           @duration -= dt
   144→           return true if @duration <= 0
   145→           effects\circle @x, @y, 3, colors.white
   146→       >> @
   147→
   148→
   149→--------------------------------------------------------------------------------
   150→-- QUERYING (all() without A alias)

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   145→           effects\circle @x, @y, 3, colors.white
   146→       >> @
   147→
   148→
   149→--------------------------------------------------------------------------------
   150→-- QUERYING (A alias preserved)
   151→--------------------------------------------------------------------------------
   152→
   153→-- A remains the alias for all()
   154→for enemy in *arena\A 'enemy'
   155→  enemy\explode!
   156→
   157→if #arena\A 'enemy' == 0
   158→  arena\next_wave!
   159→
   160→
   161→--------------------------------------------------------------------------------
   162→-- SIDE BY SIDE COMPARISON

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   161→--------------------------------------------------------------------------------
   162→-- SIDE BY SIDE COMPARISON
   163→--------------------------------------------------------------------------------
   164→
   165→-- Minimal anonymous object
   166→Y! ^ {x: 100} / (dt) => game\circle @x, @y, 5, colors.white >> arena
   167→
   168→-- Named object
   169→Y 'ball' ^ {x: 100} / (dt) => game\circle @x, @y, 5, colors.white >> arena
   170→
   171→-- All three phases, anonymous
   172→Y! ^ {x: 100}
   173→   / E (dt) => -- early
   174→   / (dt) =>   -- main
   175→   / L (dt) => -- late
   176→   >> arena
   177→
   178→-- Named actions
   179→@ / E 'physics', (dt) => -- named early, creates @physics
   180→@ / X 'update', (dt) =>  -- named main, creates @update

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   180→@ / X 'update', (dt) =>  -- named main, creates @update
   181→@ / L 'draw', (dt) =>    -- named late, creates @draw
   182→
   183→
   184→--------------------------------------------------------------------------------
   185→-- THE FULL ALIAS SET
   186→--------------------------------------------------------------------------------
   187→
   188→-- Y = object constructor
   189→-- E = early action (mnemonic: Early)
   190→-- X = named action (mnemonic: eXplicit)
   191→-- L = late action (mnemonic: Late)
   192→-- A = all() query (mnemonic: All)
   193→

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→-- Operator Comparison: T for object, E for early, L for late
     2→--
     3→-- New assignments:
     4→--   T = object (Thing)
     5→--   E = early action
     6→--   L = late action
     7→--   X = named action (unchanged)
     8→--   A = all() query (unchanged)
     9→
    10→--------------------------------------------------------------------------------
    11→-- SIMPLE INLINE OBJECTS
    12→--------------------------------------------------------------------------------

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    10→--------------------------------------------------------------------------------
    11→-- SIMPLE INLINE OBJECTS
    12→--------------------------------------------------------------------------------
    13→
    14→-- Anonymous particle
    15→T! ^ {x: 100, y: 100, v: 50}
    16→   / (dt) =>
    17→       @x += @v * dt
    18→       game\circle @x, @y, 5, colors.white
    19→   >> arena
    20→
    21→-- Named ball (arena.ball points to this)
    22→T 'ball' ^ {x: 240, y: 135, vx: 100, vy: 100}
    23→          / (dt) =>
    24→              @x += @vx * dt
    25→              @y += @vy * dt
    26→              game\circle @x, @y, 8, an.colors.white
    27→          >> arena
    28→
    29→
    30→--------------------------------------------------------------------------------
    31→-- ALL THREE PHASES

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    30→--------------------------------------------------------------------------------
    31→-- ALL THREE PHASES
    32→--------------------------------------------------------------------------------
    33→
    34→-- Particle with early/main/late
    35→T 'particle' ^ {x: 100, y: 100, v: 50, r: 0}
    36→   / E (dt) =>
    37→       -- early: physics prep, input gathering
    38→       @r = math.atan2 @target.y - @y, @target.x - @x
    39→   / (dt) =>
    40→       -- main: logic
    41→       @x += @v * math.cos(@r) * dt
    42→       @y += @v * math.sin(@r) * dt
    43→   / L (dt) =>
    44→       -- late: drawing
    45→       game\circle @x, @y, 5, colors.white
    46→   >> arena
    47→
    48→
    49→--------------------------------------------------------------------------------
    50→-- CLASS-BASED OBJECTS

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   111→      + paddle 'left', 30, 135
   112→      + paddle 'right', 450, 135
   113→      + { wall 'top', wall 'bottom' }
   114→
   115→-- Inline object in hierarchy (needs parens)
   116→arena + paddle 'left', 30, 135
   117→      + paddle 'right', 450, 135
   118→      + (T 'ball' ^ {x: 240, y: 135}
   119→                  / (dt) =>
   120→                      @x += @vx * dt
   121→                      game\circle @x, @y, 8, colors.white)
   122→
   123→
   124→--------------------------------------------------------------------------------
   125→-- SPAWNING PATTERNS

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   124→--------------------------------------------------------------------------------
   125→-- SPAWNING PATTERNS
   126→--------------------------------------------------------------------------------
   127→
   128→class arena extends object
   129→  spawn_ball: =>
   130→    T 'ball' ^ {x: 240, y: 135, vx: 100, vy: 100}
   131→             / (dt) =>
   132→                 @x += @vx * dt
   133→                 @y += @vy * dt
   134→                 game\circle @x, @y, 8, an.colors.white
   135→             >> @
   136→    -- @ball now exists, old ball auto-killed if existed
   137→
   138→  spawn_particle: (x, y) =>
   139→    T! ^ {x: x, y: y, v: an\random_float 50, 100, r: an\random_angle!, duration: 0.5}
   140→       / (dt) =>
   141→           @x += @v * math.cos(@r) * dt
   142→           @y += @v * math.sin(@r) * dt
   143→           @duration -= dt
   144→           return true if @duration <= 0
   145→           effects\circle @x, @y, 3, colors.white
   146→       >> @
   147→
   148→
   149→--------------------------------------------------------------------------------
   150→-- QUERYING (A alias preserved)

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   161→--------------------------------------------------------------------------------
   162→-- SIDE BY SIDE COMPARISON
   163→--------------------------------------------------------------------------------
   164→
   165→-- Minimal anonymous object
   166→T! ^ {x: 100} / (dt) => game\circle @x, @y, 5, colors.white >> arena
   167→
   168→-- Named object
   169→T 'ball' ^ {x: 100} / (dt) => game\circle @x, @y, 5, colors.white >> arena
   170→
   171→-- All three phases, anonymous
   172→T! ^ {x: 100}
   173→   / E (dt) => -- early
   174→   / (dt) =>   -- main
   175→   / L (dt) => -- late
   176→   >> arena
   177→
   178→-- Named actions
   179→@ / E 'physics', (dt) => -- named early, creates @physics
   180→@ / X 'update', (dt) =>  -- named main, creates @update

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   184→--------------------------------------------------------------------------------
   185→-- THE FULL ALIAS SET
   186→--------------------------------------------------------------------------------
   187→
   188→-- T = object constructor (mnemonic: Thing)
   189→-- E = early action (mnemonic: Early)
   190→-- X = named action (mnemonic: eXplicit)
   191→-- L = late action (mnemonic: Late)
   192→-- A = all() query (mnemonic: All)
   193→

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→-- Operator Comparison: X for object, E for early, L for late
     2→--
     3→-- New assignments:
     4→--   X = object
     5→--   E = early action
     6→--   L = late action
     7→--   N = named action (mnemonic: Named)
     8→--   A = all() query (unchanged)
     9→
    10→--------------------------------------------------------------------------------
    11→-- SIMPLE INLINE OBJECTS
    12→--------------------------------------------------------------------------------

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    10→--------------------------------------------------------------------------------
    11→-- SIMPLE INLINE OBJECTS
    12→--------------------------------------------------------------------------------
    13→
    14→-- Anonymous particle
    15→X! ^ {x: 100, y: 100, v: 50}
    16→   / (dt) =>
    17→       @x += @v * dt
    18→       game\circle @x, @y, 5, colors.white
    19→   >> arena
    20→
    21→-- Named ball (arena.ball points to this)
    22→X 'ball' ^ {x: 240, y: 135, vx: 100, vy: 100}
    23→          / (dt) =>
    24→              @x += @vx * dt
    25→              @y += @vy * dt
    26→              game\circle @x, @y, 8, an.colors.white
    27→          >> arena
    28→
    29→
    30→--------------------------------------------------------------------------------
    31→-- ALL THREE PHASES

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    30→--------------------------------------------------------------------------------
    31→-- ALL THREE PHASES
    32→--------------------------------------------------------------------------------
    33→
    34→-- Particle with early/main/late
    35→X 'particle' ^ {x: 100, y: 100, v: 50, r: 0}
    36→   / E (dt) =>
    37→       -- early: physics prep, input gathering
    38→       @r = math.atan2 @target.y - @y, @target.x - @x
    39→   / (dt) =>
    40→       -- main: logic
    41→       @x += @v * math.cos(@r) * dt
    42→       @y += @v * math.sin(@r) * dt
    43→   / L (dt) =>
    44→       -- late: drawing
    45→       game\circle @x, @y, 5, colors.white
    46→   >> arena
    47→
    48→
    49→--------------------------------------------------------------------------------
    50→-- CLASS-BASED OBJECTS

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    81→    super 'arena'
    82→    @ + timer!
    83→    @water_springs_count = 52
    84→
    85→    -- Named early action
    86→    @ / E 'water_sim', (dt) =>
    87→      for k = 1, 8
    88→        for i = 1, @water_springs_count
    89→          -- propagate spring velocities
    90→
    91→    -- Named main action
    92→    @ / N 'update', (dt) =>
    93→      -- game logic
    94→
    95→    -- Named late action
    96→    @ / L 'water_draw', (dt) =>
    97→      for spring in *@water_springs.children
    98→        -- build polyline
    99→
   100→  pause_water: =>
   101→    @water_sim\kill! if @water_sim
   102→    @water_draw\kill! if @water_draw

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   111→      + paddle 'left', 30, 135
   112→      + paddle 'right', 450, 135
   113→      + { wall 'top', wall 'bottom' }
   114→
   115→-- Inline object in hierarchy (needs parens)
   116→arena + paddle 'left', 30, 135
   117→      + paddle 'right', 450, 135
   118→      + (X 'ball' ^ {x: 240, y: 135}
   119→                  / (dt) =>
   120→                      @x += @vx * dt
   121→                      game\circle @x, @y, 8, colors.white)
   122→
   123→
   124→--------------------------------------------------------------------------------
   125→-- SPAWNING PATTERNS

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   124→--------------------------------------------------------------------------------
   125→-- SPAWNING PATTERNS
   126→--------------------------------------------------------------------------------
   127→
   128→class arena extends object
   129→  spawn_ball: =>
   130→    X 'ball' ^ {x: 240, y: 135, vx: 100, vy: 100}
   131→             / (dt) =>
   132→                 @x += @vx * dt
   133→                 @y += @vy * dt
   134→                 game\circle @x, @y, 8, an.colors.white
   135→             >> @
   136→    -- @ball now exists, old ball auto-killed if existed
   137→
   138→  spawn_particle: (x, y) =>
   139→    X! ^ {x: x, y: y, v: an\random_float 50, 100, r: an\random_angle!, duration: 0.5}
   140→       / (dt) =>
   141→           @x += @v * math.cos(@r) * dt
   142→           @y += @v * math.sin(@r) * dt
   143→           @duration -= dt
   144→           return true if @duration <= 0
   145→           effects\circle @x, @y, 3, colors.white
   146→       >> @
   147→
   148→
   149→--------------------------------------------------------------------------------
   150→-- QUERYING (A alias preserved)

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   161→--------------------------------------------------------------------------------
   162→-- SIDE BY SIDE COMPARISON
   163→--------------------------------------------------------------------------------
   164→
   165→-- Minimal anonymous object
   166→X! ^ {x: 100} / (dt) => game\circle @x, @y, 5, colors.white >> arena
   167→
   168→-- Named object
   169→X 'ball' ^ {x: 100} / (dt) => game\circle @x, @y, 5, colors.white >> arena
   170→
   171→-- All three phases, anonymous
   172→X! ^ {x: 100}
   173→   / E (dt) => -- early
   174→   / (dt) =>   -- main
   175→   / L (dt) => -- late
   176→   >> arena
   177→
   178→-- Named actions
   179→@ / E 'physics', (dt) => -- named early, creates @physics
   180→@ / N 'update', (dt) =>  -- named main, creates @update
   181→@ / L 'draw', (dt) =>    -- named late, creates @draw
   182→
   183→
   184→--------------------------------------------------------------------------------
   185→-- THE FULL ALIAS SET

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   184→--------------------------------------------------------------------------------
   185→-- THE FULL ALIAS SET
   186→--------------------------------------------------------------------------------
   187→
   188→-- X = object constructor
   189→-- E = early action (mnemonic: Early)
   190→-- N = named action (mnemonic: Named) -- breaks runic rule but clear mnemonic
   191→-- L = late action (mnemonic: Late)
   192→-- A = all() query (mnemonic: All)
   193→

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→-- Final Alias Set
     2→--
     3→--   E = object (Entity)
     4→--   U = early action (Under/underlying)
     5→--   L = late action (Late)
     6→--   X = named action (eXplicit)
     7→--   A = all() query (All)
     8→
     9→--------------------------------------------------------------------------------
    10→-- SIMPLE INLINE OBJECTS
    11→--------------------------------------------------------------------------------

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     9→--------------------------------------------------------------------------------
    10→-- SIMPLE INLINE OBJECTS
    11→--------------------------------------------------------------------------------
    12→
    13→-- Anonymous particle
    14→E! ^ {x: 100, y: 100, v: 50}
    15→   / (dt) =>
    16→       @x += @v * dt
    17→       game\circle @x, @y, 5, colors.white
    18→   >> arena
    19→
    20→-- Named ball (arena.ball points to this)
    21→E 'ball' ^ {x: 240, y: 135, vx: 100, vy: 100}
    22→          / (dt) =>
    23→              @x += @vx * dt
    24→              @y += @vy * dt
    25→              game\circle @x, @y, 8, an.colors.white
    26→          >> arena
    27→
    28→
    29→--------------------------------------------------------------------------------
    30→-- ALL THREE PHASES

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    29→--------------------------------------------------------------------------------
    30→-- ALL THREE PHASES
    31→--------------------------------------------------------------------------------
    32→
    33→-- Particle with early/main/late
    34→E 'particle' ^ {x: 100, y: 100, v: 50, r: 0}
    35→   / U (dt) =>
    36→       -- early: physics prep, input gathering
    37→       @r = math.atan2 @target.y - @y, @target.x - @x
    38→   / (dt) =>
    39→       -- main: logic
    40→       @x += @v * math.cos(@r) * dt
    41→       @y += @v * math.sin(@r) * dt
    42→   / L (dt) =>
    43→       -- late: drawing
    44→       game\circle @x, @y, 5, colors.white
    45→   >> arena
    46→
    47→
    48→--------------------------------------------------------------------------------
    49→-- CLASS-BASED OBJECTS

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    56→    @ + timer!
    57→    @ + collider 'player', 'dynamic', 'circle', 12
    58→    @ + spring 1, 200, 10
    59→
    60→    -- Early: gather input
    61→    @ / U (dt) =>
    62→      @input_x = 0
    63→      @input_x -= 1 if an\is_down 'left'
    64→      @input_x += 1 if an\is_down 'right'
    65→
    66→    -- Main: apply physics
    67→    @ / (dt) =>
    68→      @collider\set_velocity @input_x * @speed, 0

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    80→    super 'arena'
    81→    @ + timer!
    82→    @water_springs_count = 52
    83→
    84→    -- Named early action
    85→    @ / U 'water_sim', (dt) =>
    86→      for k = 1, 8
    87→        for i = 1, @water_springs_count
    88→          -- propagate spring velocities
    89→
    90→    -- Named main action
    91→    @ / X 'update', (dt) =>
    92→      -- game logic
    93→
    94→    -- Named late action
    95→    @ / L 'water_draw', (dt) =>
    96→      for spring in *@water_springs.children
    97→        -- build polyline
    98→
    99→  pause_water: =>
   100→    @water_sim\kill! if @water_sim
   101→    @water_draw\kill! if @water_draw

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   110→      + paddle 'left', 30, 135
   111→      + paddle 'right', 450, 135
   112→      + { wall 'top', wall 'bottom' }
   113→
   114→-- Inline object in hierarchy (needs parens)
   115→arena + paddle 'left', 30, 135
   116→      + paddle 'right', 450, 135
   117→      + (E 'ball' ^ {x: 240, y: 135}
   118→                  / (dt) =>
   119→                      @x += @vx * dt
   120→                      game\circle @x, @y, 8, colors.white)
   121→
   122→
   123→--------------------------------------------------------------------------------
   124→-- SPAWNING PATTERNS

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   123→--------------------------------------------------------------------------------
   124→-- SPAWNING PATTERNS
   125→--------------------------------------------------------------------------------
   126→
   127→class arena extends object
   128→  spawn_ball: =>
   129→    E 'ball' ^ {x: 240, y: 135, vx: 100, vy: 100}
   130→             / (dt) =>
   131→                 @x += @vx * dt
   132→                 @y += @vy * dt
   133→                 game\circle @x, @y, 8, an.colors.white
   134→             >> @
   135→    -- @ball now exists, old ball auto-killed if existed
   136→
   137→  spawn_particle: (x, y) =>
   138→    E! ^ {x: x, y: y, v: an\random_float 50, 100, r: an\random_angle!, duration: 0.5}
   139→       / (dt) =>
   140→           @x += @v * math.cos(@r) * dt
   141→           @y += @v * math.sin(@r) * dt
   142→           @duration -= dt
   143→           return true if @duration <= 0
   144→           effects\circle @x, @y, 3, colors.white
   145→       >> @
   146→
   147→
   148→--------------------------------------------------------------------------------
   149→-- QUERYING (A alias preserved)

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   160→--------------------------------------------------------------------------------
   161→-- SIDE BY SIDE COMPARISON
   162→--------------------------------------------------------------------------------
   163→
   164→-- Minimal anonymous object
   165→E! ^ {x: 100} / (dt) => game\circle @x, @y, 5, colors.white >> arena
   166→
   167→-- Named object
   168→E 'ball' ^ {x: 100} / (dt) => game\circle @x, @y, 5, colors.white >> arena
   169→
   170→-- All three phases, anonymous
   171→E! ^ {x: 100}
   172→   / U (dt) => -- early
   173→   / (dt) =>   -- main
   174→   / L (dt) => -- late
   175→   >> arena
   176→
   177→-- Named actions
   178→@ / U 'physics', (dt) => -- named early, creates @physics
   179→@ / X 'update', (dt) =>  -- named main, creates @update
   180→@ / L 'draw', (dt) =>    -- named late, creates @draw
   181→
   182→
   183→--------------------------------------------------------------------------------
   184→-- THE FULL ALIAS SET

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   183→--------------------------------------------------------------------------------
   184→-- THE FULL ALIAS SET
   185→--------------------------------------------------------------------------------
   186→
   187→-- E = object (mnemonic: Entity)
   188→-- U = early action (mnemonic: Under/underlying)
   189→-- L = late action (mnemonic: Late)
   190→-- X = named action (mnemonic: eXplicit)
   191→-- A = all() query (mnemonic: All)
   192→

1→# Anchor Engine Specification
     2→
     3→*Anchor is a 2D game engine built around locality of behavior and minimal cognitive overhead. Code that belongs together stays together.*
     4→
     5→---
     6→
     7→## Table of Contents
     8→
     9→1. [Core Philosophy](#core-philosophy)
    10→2. [The Object Tree](#the-object-tree)
    11→3. [Lifecycle](#lifecycle)
    12→4. [Colliders, Springs, and Timers](#colliders-springs-and-timers)
    13→5. [Locality of Behavior](#locality-of-behavior)
    14→6. [Drawing](#drawing)
    15→7. [Lua Syntax Features](#lua-syntax-features)
    16→8. [YueScript Alternative](#yuescript-alternative)
    17→9. [YueScript Class System Integration](#yuescript-class-system-integration)
    18→10. [Technology Stack](#technology-stack)
    19→11. [Rendering](#rendering)
    20→12. [Error Handling](#error-handling)
    21→13. [Build and Distribution](#build-and-distribution)
    22→14. [File Structure](#file-structure)
    23→15. [Performance Path](#performance-path)
    24→16. [Deferred Features](#deferred-features)
    25→
    26→---
    27→
    28→## Core Philosophy
    29→
    30→### Locality of Behavior
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    80→
    81→These patterns have their place — large teams need boundaries, enterprise software needs flexibility. But for solo development, they're pure friction. Every layer of indirection is a place where bugs can hide and a concept you must hold in your head.
    82→
    83→Anchor actively rejects these patterns. Instead:
    84→- **Globals are available:** `an`, `E`, `X`, `U`, `L`, `A` are just there. No imports needed. You can use them from anywhere, in any file, without setup.
    85→- **Direct mutation:** Set properties directly. `self.hp = 100`. No setter methods, no signals, no observers pattern. If you want to react to a change, you check the value in your update function.
    86→- **Explicit calls:** When something happens, you call a function. `enemy:take_damage(10)`. No event buses, no implicit subscriptions, no wondering "what else triggers when this happens?"
    87→- **Zero setup:** Drop a `.ttf` in a folder and it loads. Create an object and it exists. The engine assumes you want things to work, not that you want to configure how they work.
    88→

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   204→---
   205→
   206→## Lifecycle
   207→
   208→### Update Order
   209→
   210→Each frame:
   211→
   212→1. **Collect all objects** — Traverse tree, gather all non-dead objects
   213→2. **Early actions** (`/ U`) — Run all early_action functions (tree order)
   214→3. **Main actions** (`/`) — Run all action functions (tree order)
   215→4. **Late actions** (`/ L`) — Run all late_action functions (tree order)
   216→5. **Cleanup** — Remove dead objects, remove dead actions, call destroy() hooks
   217→
   218→Objects created during the frame are collected in the next frame (they don't run actions in the frame they're created).
   219→
   220→### Action Phase Execution

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   431→## Lua Syntax Features
   432→
   433→*These features were developed after analyzing [amulet.xyz](http://amulet.xyz), Ian MacLarty's Lua game engine. Amulet uses elegant operator overloading for scene graph construction. We adapted the patterns that fit Anchor's model while rejecting those that don't (like transforms-as-nodes and coroutine-based actions).*
   434→
   435→### Operator Overview
   436→
   437→Anchor uses Lua's operator overloading to create a concise, pipeline-style syntax for object construction:
   438→
   439→| Operator | Operation | Description |
   440→|----------|-----------|-------------|
   441→| `^` | set/build | Assign properties (table) or run init code (function) |
   442→| `/` | action | Add action (runs every frame) |
   443→| `+` | add children | Add child objects to parent (parent-centric) |
   444→| `>>` | flow to parent | Add self to parent, **returns parent** (object-centric) |
   445→
   446→The `/` operator handles all action phases. Use the `U` and `L` helpers to mark early/late phases:
   447→
   448→| Pattern | Phase | When it runs |
   449→|---------|-------|--------------|
   450→| `/ U fn` | early | Before main actions |
   451→| `/ fn` | main | The main update phase |
   452→| `/ L fn` | late | After main actions (often drawing) |
   453→
   454→Operators are ordered by precedence (highest to lowest: `^`, then `/`, then `+`, then `>>`), so they chain naturally left-to-right without parentheses.
   455→
   456→### Single-Letter Aliases
   457→
   458→For elegance, Anchor provides three single-letter aliases that look like runes:

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   452→| `/ L fn` | late | After main actions (often drawing) |
   453→
   454→Operators are ordered by precedence (highest to lowest: `^`, then `/`, then `+`, then `>>`), so they chain naturally left-to-right without parentheses.
   455→
   456→### Single-Letter Aliases
   457→
   458→For elegance, Anchor provides single-letter aliases that look like runes:
   459→
   460→| Alias | Purpose | Mnemonic |
   461→|-------|---------|----------|
   462→| `E` | Object constructor | Entity |
   463→| `U` | Early action helper | Under/underlying |
   464→| `L` | Late action helper | Late |
   465→| `X` | Named action helper | eXplicit |
   466→| `A` | Query descendants | All |
   467→
   468→These are defined in the engine:
   469→
   470→```lua
   471→E = object
   472→U = function(fn) return {__early = fn} end
   473→L = function(fn) return {__late = fn} end
   474→X = function(name, fn) return {[name] = fn} end
   475→-- A is a method alias: self:A('tag') == self:all('tag')
   476→```
   477→
   478→**Future single-letter aliases** should prefer these characters, chosen for their angular, runic appearance (symmetrical, minimal roundness):
   479→
   480→```

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   480→```
   481→E, X, A, T, L, V, U, Y, I, H
   482→```
   483→
   484→### Action Helpers: `U`, `L`, and `X`
   485→
   486→The `/` operator handles all action phases. Use helpers to specify phase or name:
   487→
   488→**Phase helpers (`U` and `L`):**
   489→```lua
   490→self / U(function(self, dt) ... end)  -- early action
   491→self / function(self, dt) ... end     -- main action (default)
   492→self / L(function(self, dt) ... end)  -- late action
   493→```
   494→
   495→**Named action helper (`X`):**
   496→```lua
   497→-- Anonymous action (no name, can't be cancelled)
   498→self / function(self, dt) ... end
   499→
   500→-- Named action using X helper (self.seek points to this)
   501→self / X('seek', function(self, dt) ... end)
   502→
   503→-- Cancel later
   504→self.seek:kill()
   505→```
   506→
   507→**Combining phase and name** — use `U` or `L` with a name parameter:
   508→```lua
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   540→               self:add(timer())
   541→           end
   542→```
   543→
   544→### The `/` Operator: Actions
   545→
   546→The `/` operator adds actions. Use `U` and `L` helpers to specify early/late phases:
   547→
   548→```lua
   549→object() ^ {x = 100, y = 200}
   550→         / U(function(self, dt)
   551→               -- early: runs first
   552→           end)
   553→         / function(self, dt)
   554→               -- main update
   555→               game:circle(self.x, self.y, 10, color)
   556→           end
   557→         / L(function(self, dt)
   558→               -- late: runs last, good for drawing that needs final positions
   559→           end)
   560→```
   561→
   562→Actions return `true` to remove themselves (one-shot behavior). Returning `true` only removes the action, not the object.
   563→
   564→### The `>>` Operator: Flow to Parent
   565→
   566→The `>>` operator adds the left object as a child of the right object and **returns the parent**:

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   632→-- Named (self.timer.flash points to this, can be killed/replaced)
   633→self.timer:after(0.15, 'flash', function() self.flashing = false end)
   634→```
   635→
   636→**Actions** can use the `U`, `L`, and `X` helpers, or methods:
   637→```lua
   638→-- Anonymous actions with phase helpers
   639→E() / U(early_fn) / update_fn / L(late_fn) >> arena
   640→
   641→-- Named actions with phase helpers
   642→self / U('water_sim', fn)   -- named early
   643→self / X('update', fn)      -- named main
   644→self / L('draw', fn)        -- named late
   645→
   646→-- Named with methods (alternative)
   647→self:action('update', fn)
   648→self:early_action('water_sim', fn)
   649→self:late_action('water_draw', fn)
   650→
   651→-- Cancel later
   652→self.water_sim:kill()
   653→```
   654→
   655→The helpers are simply:
   656→```lua
   657→U = function(name_or_fn, fn) ... end  -- marks early phase
   658→L = function(name_or_fn, fn) ... end  -- marks late phase
   659→X = function(name, fn) return {[name] = fn} end  -- marks name only
   660→```
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   765→## YueScript Alternative
   766→
   767→*YueScript (evolved from MoonScript) is a language that compiles to Lua. It offers significant syntactic improvements: significant whitespace, `@` for self, `=>` for methods with implicit self, no `end` keywords, `+=`/`-=` operators, and optional parentheses. The operator-based object construction style fits YueScript's aesthetic particularly well.*
   768→
   769→### Single-Letter Aliases in YueScript
   770→
   771→The same single-letter aliases work in YueScript:
   772→
   773→```yuescript
   774→E = object                       -- Entity/object constructor
   775→U = (fn) -> {__early: fn}        -- early action helper (Under)
   776→L = (fn) -> {__late: fn}         -- late action helper (Late)
   777→X = (name, fn) -> {[name]: fn}   -- named action helper (eXplicit)
   778→-- A is a method alias: @\A 'tag' == @\all 'tag'
   779→```
   780→
   781→### Syntax Comparison
   782→
   783→| Lua | YueScript |

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   826→       game\circle @x, @y, 10, color
   827→   >> arena
   828→```
   829→
   830→**Named actions with helpers:**
   831→```yuescript
   832→class arena extends object
   833→  new: =>
   834→    super 'arena'
   835→    @water_springs_count = 52
   836→
   837→    -- Named early action
   838→    @ / U 'water_sim', (dt) =>
   839→      for k = 1, 8
   840→        for i = 1, @water_springs_count
   841→          -- propagate spring velocities
   842→
   843→    -- Named late action
   844→    @ / L 'water_draw', (dt) =>
   845→      @water_surface = {}
   846→      for spring in *@water_springs.children
   847→        -- build polyline using * iteration
   848→
   849→-- Cancel later
   850→@water_sim\kill!
   851→```
   852→
   853→**Player example:**
   854→```yuescript
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   849→-- Cancel later
   850→@water_sim\kill!
   851→```
   852→
   853→**Player example:**
   854→```yuescript
   855→class player extends object
   856→  new: (x, y, args) =>
   857→    super 'player', args
   858→    @x, @y = x, y
   859→
   860→    -- Add collider and springs as children
   861→    @ + collider 'player', 'dynamic', 'circle', 12
   862→    @ + spring 'main', 1, 200, 10
   863→    @ + spring 'shoot', 1, 300, 15
   864→
   865→    -- Named action for input
   866→    @ / X 'input', (dt) =>
   867→      return if @stunned
   868→      @vx = -@speed if an\is_down 'left'
   869→      @vx = @speed if an\is_down 'right'
   870→
   871→    -- Anonymous action (always runs)
   872→    @ / (dt) =>
   873→      @x, @y = @collider\get_position!
   874→
   875→    -- Named late action for drawing
   876→    @ / L 'draw', (dt) =>
   877→      game\push @x, @y, 0, @main.x, @main.x
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   953→## YueScript Class System Integration
   954→
   955→Anchor uses YueScript's native class system with inheritance. This section details how the operator-based syntax integrates with YueScript classes.
   956→
   957→### Base Object Class
   958→
   959→The `object` class is the root of all game objects. It provides the core functionality and operators:
   960→
   961→```yuescript
   962→class object
   963→  -- Class-level callback: propagate metamethods to child classes
   964→  @__inherited: (child) =>
   965→    -- Copy operator metamethods to child's base
   966→    for mm in *{'__pow', '__div', '__add', '__shr'}
   967→      unless rawget child.__base, mm
   968→        child.__base[mm] = @__base[mm]
   969→    -- Also propagate __inherited itself
   970→    unless rawget child, '__inherited'
   971→      child.__inherited = @@__inherited
   972→
   973→  -- Constructor
   974→  new: (name, args) =>
   975→    @name = name
   976→    @children = {}
   977→    @tags = {}
   978→    @dead = false
   979→    if args
   980→      for k, v in pairs args
   981→        @[k] = v
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  1213→  late_update: (dt) =>
  1214→    game\circle @x, @y, @radius, @color
  1215→```
  1216→
  1217→**Methods and actions both run.** If an object has both an `update:` method and `/` actions, the method runs first, then the actions. This allows class-defined behavior to coexist with dynamically added behavior.
  1218→
  1219→Note: The `%` and `//` operators are no longer used. All actions use `/` with `U` and `L` helpers for phase selection.
  1220→
  1221→### Colliders, Springs, and Timers Are Tree Objects
  1222→
  1223→Colliders, springs, and timers are all proper tree objects (classes extending `object`). They live in `@children` like any other child, and die when their parent dies.

1→# CLAUDE.md
     2→
     3→Guidelines for Claude Code instances working on Anchor and games built with it.
     4→
     5→---
     6→
     7→## Read First
     8→
     9→Read `docs/ANCHOR.md` before doing anything. It covers:
    10→- The object tree model (tree-based ownership, automatic cleanup)
    11→- How objects, timers, springs, and colliders work
    12→- The action-based vs rules-based spectrum
    13→- Technical implementation details (OpenGL rendering, Box2D physics)
    14→
    15→**For the reasoning behind these decisions** — why the engine works the way it does, how to evaluate new features, the developer's working style — see the [Anchor Context Brief](#anchor-context-brief) at the end of this document.
    16→
    17→---
    18→
    19→## Session Workflow
    20→
    21→**Every Claude Code session follows this workflow.**
    22→
    23→### During Session
    24→
    25→- Work normally on requested tasks
    26→- Update `docs/ANCHOR.md` when APIs or architecture changes
    27→- Update `docs/ANCHOR_IMPLEMENTATION_PLAN.md` when tasks are completed
    28→- Update this file (`CLAUDE.md`) when new patterns or conventions are established
    29→
    30→### End of Session
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   164→---
   165→
   166→## Code Patterns
   167→
   168→### Single-Letter Aliases
   169→
   170→Anchor provides single-letter aliases that look like runes:
   171→
   172→```lua
   173→E = object                                       -- Entity/object
   174→U = function(fn) return {__early = fn} end       -- Under/early action
   175→L = function(fn) return {__late = fn} end        -- Late action
   176→X = function(name, fn) return {[name] = fn} end  -- eXplicit/named
   177→-- A is a method alias: self:A('tag') == self:all('tag')
   178→```
   179→
   180→In YueScript:
   181→```yuescript
   182→E = object
   183→U = (fn) -> {__early: fn}
   184→L = (fn) -> {__late: fn}
   185→X = (name, fn) -> {[name]: fn}
   186→```
   187→
   188→**Future single-letter aliases** should prefer these characters, chosen for their angular, runic appearance (symmetrical, minimal roundness):
   189→
   190→```
   191→E, X, A, T, L, V, U, Y, I, H
   192→```
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400→
   401→**ANCHOR.md:**
   402→- Technical architecture changes
   403→- API changes (what functions exist, what they do)
   404→- New engine services or object types
   405→- Changes to the object tree model
   406→- Rendering, physics, audio implementation details
   407→
   408→**CLAUDE.md:**
   409→- New code patterns with examples
   410→- New conventions or naming rules
   411→- Changed working style preferences
   412→- New common mistakes discovered
   413→- Updates to the Patterns section below
   414→
   415→---
   416→
   417→## Patterns
   418→
   419→*This section will grow as we implement the engine. Add concrete, tested patterns here — not theoretical ones.*
   420→
   421→### Inline Single-Use Code
   422→
   423→If a function is only called once, inline it instead of extracting it. This preserves locality — you see everything in one place without jumping around.
   424→
   425→```lua
   426→-- Bad: splits up code that's only used in one place
   427→function arena:new(args)
   428→    self:object('arena', args)
   429→    self:setup_physics()
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   478→      end
   479→    >> arena
   480→```
   481→
   482→**With multiple action phases:**
   483→```lua
   484→E() ^ {x = 100, y = 200}
   485→   / U(function(self, dt)
   486→         -- early: before main updates
   487→     end)
   488→   / function(self, dt)
   489→         -- main update
   490→     end
   491→   / L(function(self, dt)
   492→          -- late: after main updates, good for drawing
   493→      end)
   494→   >> arena
   495→```
   496→
   497→**Multiple `^` operators:** When chaining multiple `^`, group all initialization before action operators:
   498→```lua
   499→-- Good: all init together, then actions

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   493→      end)
   494→   >> arena
   495→```
   496→
   497→**Multiple `^` operators:** When chaining multiple `^`, group all initialization before action operators:
   498→```lua
   499→-- Good: all init together, then actions
   500→E() ^ {x = 100, y = 200}
   501→   ^ function(self) self + timer() end
   502→   / function(self, dt) ... end
   503→   >> arena
   504→
   505→-- Bad: init split across the chain
   506→E() ^ {x = 100}
   507→   / function(self, dt) ... end
   508→   ^ function(self) self + timer() end -- init after action, harder to follow
   509→   >> arena
   510→```
   511→
   512→### Named vs Anonymous
   513→
   514→The tree automatically manages named children: adding a child with a name that already exists kills the old child first. This provides cancellation and replacement without explicit tag systems.

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   536→-- Replace (old 'flash' killed automatically)
   537→self.timer:after(0.15, 'flash', function() self.flashing = false end)
   538→```
   539→
   540→**Actions:**
   541→```lua
   542→-- Anonymous actions with phase helpers
   543→E() / U(early_fn) / update_fn / L(late_fn) >> arena
   544→
   545→-- Named actions with phase helpers
   546→self / U('water_sim', fn)   -- named early
   547→self / X('update', fn)      -- named main
   548→self / L('draw', fn)        -- named late
   549→
   550→-- Named with methods (alternative)
   551→self:action('update', fn)
   552→self:early_action('water_sim', fn)
   553→self:late_action('water_draw', fn)
   554→
   555→-- Cancel
   556→self.water_sim:kill()
   557→```
   558→
   559→### Hierarchy Building with `+`
   560→
   561→Use the `+` operator to build object hierarchies declaratively (parent-centric style):

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   670→    end)
   671→end
   672→```
   673→
   674→### Named Actions Pattern
   675→
   676→Use named actions with the `U`, `L`, and `X` helpers when you need to cancel or replace ongoing behavior:
   677→
   678→```lua
   679→function arena:new()
   680→    self:object('arena')
   681→
   682→    -- Named early action
   683→    self / U('water_sim', function(self, dt)
   684→        -- propagate spring velocities
   685→    end)
   686→
   687→    -- Named late action
   688→    self / L('water_draw', function(self, dt)
   689→        -- build water surface polyline
   690→    end)
   691→end
   692→
   693→function arena:pause_water()
   694→    if self.water_sim then self.water_sim:kill() end
   695→    if self.water_draw then self.water_draw:kill() end
   696→end
   697→
   698→function arena:resume_water()
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   821→#### No Bureaucracy
   822→
   823→Imports, exports, dependency injection, configuration objects, registration systems — these are bureaucracy. They may be necessary in large teams, but for solo development they're friction.
   824→
   825→Anchor prefers:
   826→- Globals that are just available (`an`, `E`, `U`, `L`, `X`, `A`)
   827→- Direct mutation over message passing
   828→- Explicit calls over implicit event systems
   829→- Things that work without setup
   830→
   831→**When evaluating features:** Does this require ceremony to use, or does it just work?
   832→
   833→#### Alien But Right

The file /home/adn/a327ex/Anchor/.claude/CLAUDE.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   829→- Things that work without setup
   830→
   831→**When evaluating features:** Does this require ceremony to use, or does it just work?
   832→
   833→#### Alien But Right
   834→
   835→The operator syntax (`^`, `/`, `+`, `>>`) and single-letter aliases (`E`, `U`, `L`, `X`, `A`) are deliberately unusual. Inspired by Hoon's rune system — symbols that seem foreign at first but become natural with use.
   836→
   837→The goal isn't familiarity, it's terseness and visual distinctiveness. `E 'player'` is weirder than `Object.new('player')` but it's shorter and once learned, instantly recognizable.
   838→
   839→Single-letter aliases follow a preference for angular, symmetrical letters: E, X, A, T, L, V, U, Y, I, H. Avoid round letters (O, Q, C, G).
   840→
   841→**When evaluating features:** Does this earn its complexity? Is the weirdness worth it?
   842→
   843→### Language Boundary Philosophy

1→# Anchor Implementation Plan
     2→
     3→C engine with YueScript scripting, OpenGL rendering, targeting Windows, Linux, and Web.
     4→
     5→---
     6→
     7→## Summary of Key Decisions
     8→
     9→| Area | Decision | Rationale |
    10→|------|----------|-----------|
    11→| Renderer | OpenGL | Smooth rotation, additive blending, performance headroom, console-portable |
    12→| Audio | TBD (miniaudio or SoLoud) | Need pitch shifting; SDL_mixer insufficient |
    13→| Physics | Box2D 3.1 | Already used, true ball-to-ball collisions needed |
    14→| Scripting | Lua 5.4 + YueScript | Build-time compilation with `-r` flag for line numbers |
    15→| Timestep | Fixed 60fps | Determinism matters for potential replay support |
    16→| Resolution | Per-game configurable | 480×270, 640×360, or custom; integer scaling |
    17→| C Structure | Single anchor.c | Monolithic file, easier navigation |
    18→| Resources | Live forever | Games are small enough; no unloading needed |
    19→| Distribution | Single executable | Assets embedded |
    20→
    21→---
    22→
    23→## Build Strategy
    24→
    25→### YueScript Compilation
    26→
    27→**Build-time compilation** — compile `.yue` → `.lua` during build, not at runtime.
    28→
    29→```
    30→game.yue ──► yue -r ──► game.lua ──► embedded in executable
... [170 more lines]

470→
   471→### 10.1 YueScript Build Integration
   472→- [ ] Install YueScript compiler
   473→- [ ] Add compilation step to build.bat/build.sh
   474→- [ ] Use `-r` flag for line number preservation
   475→- [ ] Verify errors report correct .yue line numbers
   476→
   477→### 10.2 Base Object Class
   478→Implement in `yue/object.yue`:
   479→- Constructor with name/args
   480→- Tree operations: `add_child`, `remove_child`, `kill`
   481→- Tagging: `tag`, `is`, `all` / `A`
   482→- Links: `link` for horizontal dependencies
   483→- Operators: `^`, `%`, `/`, `//`, `+`, `>>`
   484→- `__inherited` hook to propagate operators to child classes
   485→
   486→**Ask developer before implementing details.**
   487→
   488→### Engine Object Pattern
   489→
   490→Timer, spring, and collider are examples of **engine objects** — classes that wrap C-side resources. All engine objects follow this pattern:
   491→
   492→1. They extend the base `object` class
   493→2. They're instantiated and added as children: `@ + timer()`
   494→3. They're named after themselves by default (e.g., `timer()` has `name = 'timer'`)
   495→4. Parent accesses them via that name: `@timer:after(...)`
   496→5. They implement `destroy()` to clean up C-side resources when killed
   497→
   498→This pattern applies to any future engine objects (particles, audio sources, etc.).
   499→
... [111 more lines]

The file /home/adn/a327ex/Anchor/docs/ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   473→- [ ] Add compilation step to build.bat/build.sh
   474→- [ ] Use `-r` flag for line number preservation
   475→- [ ] Verify errors report correct .yue line numbers
   476→
   477→### 10.2 Base Object Class
   478→Implement in `yue/object.yue`:
   479→- Constructor with name/args
   480→- Tree operations: `add`, `remove`, `kill`
   481→- Tagging: `tag`, `is`, `all` / `A`
   482→- Links: `link` for horizontal dependencies
   483→- Operators: `^`, `/`, `+`, `>>`
   484→- Phase helpers: `U` (early), `L` (late), `X` (named)
   485→- `__inherited` hook to propagate operators to child classes
   486→
   487→**Ask developer before implementing details.**
   488→
   489→### Engine Object Pattern
   490→
   491→Timer, spring, and collider are examples of **engine objects** — classes that wrap C-side resources. All engine objects follow this pattern:

The file /home/adn/a327ex/Anchor/docs/ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   515→- Wraps Box2D body
   516→- Methods: `get_position`, `set_velocity`, `apply_impulse`, etc.
   517→- `destroy()` cleans up Box2D body when killed
   518→
   519→### 10.6 Update Loop Integration
   520→C calls into Lua each frame:
   521→1. Early phase — all `early_update` and `/ U` actions
   522→2. Main phase — all `update` and `/` actions
   523→3. Late phase — all `late_update` and `/ L` actions
   524→4. Cleanup — remove dead objects, call `destroy` hooks
   525→
   526→### 10.7 Aliases
   527→```yuescript
   528→E = object

The file /home/adn/a327ex/Anchor/docs/ANCHOR_IMPLEMENTATION_PLAN.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   522→2. Main phase — all `update` and `/` actions
   523→3. Late phase — all `late_update` and `/ L` actions
   524→4. Cleanup — remove dead objects, call `destroy` hooks
   525→
   526→### 10.7 Aliases
   527→```yuescript
   528→E = object
   529→U = (name_or_fn, fn) -> if fn then {__early: name_or_fn, __fn: fn} else {__early: name_or_fn}
   530→L = (name_or_fn, fn) -> if fn then {__late: name_or_fn, __fn: fn} else {__late: name_or_fn}
   531→X = (name, fn) -> {[name]: fn}
   532→-- A is method alias for all()
   533→```
   534→
   535→**Deliverable:** Full object system matching ANCHOR.md specification.
   536→
   537→---

The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→-- Anchor Operator Examples
     2→--
     3→-- Single-letter aliases:
     4→--   E = object (Entity)
     5→--   U = early action (Under/underlying)
     6→--   L = late action (Late)
     7→--   X = named action (eXplicit)
     8→--   A = all() query (All)
     9→
    10→--------------------------------------------------------------------------------
    11→-- SIMPLE INLINE OBJECTS
    12→--------------------------------------------------------------------------------

Found 16 files
docs/ANCHOR_IMPLEMENTATION_PLAN.md
.claude/CLAUDE.md
docs/ANCHOR.md
website/context/ANCHOR.md
website/context/CLAUDE.md
website/context/IMPLEMENTATION_PLAN.md
website/logs/2026-01-03_12-30.md
website/logs/2026-01-02_18-59.md
website/notes/Roguelite Design Analysis.md
website/logs/2026-01-02_10-00.md
website/logs/2026-01-01_19-37.md
website/files/Opus 4.5/ANCHOR.md
website/files/Opus 4.5/CLAUDE.md
website/files/Opus 4.5/IMPLEMENTATION_PLAN.md
website/logs/2026-01-01_07-37.md
website/pages/home.md

docs/ANCHOR.md:1219:Note: The `%` and `//` operators are no longer used. All actions use `/` with `U` and `L` helpers for phase selection.

No matches found

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  1213→  late_update: (dt) =>
  1214→    game\circle @x, @y, @radius, @color
  1215→```
  1216→
  1217→**Methods and actions both run.** If an object has both an `update:` method and `/` actions, the method runs first, then the actions. This allows class-defined behavior to coexist with dynamically added behavior.
  1218→
  1219→### Colliders, Springs, and Timers Are Tree Objects
  1220→
  1221→Colliders, springs, and timers are all proper tree objects (classes extending `object`). They live in `@children` like any other child, and die when their parent dies.

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   464→| `L` | Late action helper | Late |
   465→| `X` | Named action helper | eXplicit |
   466→| `A` | Query descendants | All |
   467→
   468→These are defined in the engine:
   469→
   470→```lua
   471→E = object
   472→U = function(name_or_fn, fn) ... end  -- U(fn) or U('name', fn)
   473→L = function(name_or_fn, fn) ... end  -- L(fn) or L('name', fn)
   474→X = function(name, fn) return {[name] = fn} end
   475→-- A is a method alias: self:A('tag') == self:all('tag')
   476→```
   477→
   478→**Future single-letter aliases** should prefer these characters, chosen for their angular, runic appearance (symmetrical, minimal roundness):
   479→
   480→```

The file /home/adn/a327ex/Anchor/.claude/CLAUDE.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   168→### Single-Letter Aliases
   169→
   170→Anchor provides single-letter aliases that look like runes:
   171→
   172→```lua
   173→E = object                                        -- Entity/object
   174→U = function(name_or_fn, fn) ... end              -- U(fn) or U('name', fn)
   175→L = function(name_or_fn, fn) ... end              -- L(fn) or L('name', fn)
   176→X = function(name, fn) return {[name] = fn} end   -- eXplicit/named
   177→-- A is a method alias: self:A('tag') == self:all('tag')
   178→```
   179→
   180→In YueScript:
   181→```yuescript
   182→E = object
   183→U = (name_or_fn, fn) -> ...  -- U(fn) or U('name', fn)
   184→L = (name_or_fn, fn) -> ...  -- L(fn) or L('name', fn)
   185→X = (name, fn) -> {[name]: fn}
   186→```
   187→
   188→**Future single-letter aliases** should prefer these characters, chosen for their angular, runic appearance (symmetrical, minimal roundness):
   189→
   190→```

The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
   767→*YueScript (evolved from MoonScript) is a language that compiles to Lua. It offers significant syntactic improvements: significant whitespace, `@` for self, `=>` for methods with implicit self, no `end` keywords, `+=`/`-=` operators, and optional parentheses. The operator-based object construction style fits YueScript's aesthetic particularly well.*
   768→
   769→### Single-Letter Aliases in YueScript
   770→
   771→The same single-letter aliases work in YueScript:
   772→
   773→```yuescript
   774→E = object                        -- Entity/object constructor
   775→U = (name_or_fn, fn) -> ...       -- U(fn) or U('name', fn)
   776→L = (name_or_fn, fn) -> ...       -- L(fn) or L('name', fn)
   777→X = (name, fn) -> {[name]: fn}    -- named action helper (eXplicit)
   778→-- A is a method alias: @\A 'tag' == @\all 'tag'
   779→```
   780→
   781→### Syntax Comparison
   782→
   783→| Lua | YueScript |

/home/adn/.claude/projects/-home-adn-a327ex-Anchor/62bd40e6-d4aa-4573-b7aa-e79385dcb958.jsonl

Written to /home/adn/a327ex/Anchor/website/logs/2026-01-03_15-30.md

<tool_use_error>File content (324KB) exceeds maximum allowed size (256KB). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.</tool_use_error>

1→# Session 2026-01-03 17:14
     2→
     3→---
     4→
     5→> Hi, Claude, do you know the AskUserQuestionTool?
     6→
     7→~~~
     8→Yes, I'm familiar with the AskUserQuestion tool. It's one of my available tools that allows me to ask you questions during our conversation when I need clarification, want to validate assumptions, or need help making decisions.
     9→
    10→**How it works:**
    11→
    12→- I can ask 1-4 questions at once
    13→- Each question has a short header (max 12 chars) displayed as a chip/tag
    14→- I provide 2-4 options per question, each with a label and description
    15→- You can always select "Other" to provide custom text input
    16→- There's a `multiSelect` option for questions where multiple answers apply
    17→
    18→**When I'd use it:**
    19→
    20→- Gathering your preferences or requirements
    21→- Clarifying ambiguous instructions
    22→- Getting decisions on implementation choices as I work
    23→- Offering choices about which direction to take
    24→
    25→**Example scenario:**
    26→
    27→If you asked me to "add authentication to the app," I might use AskUserQuestion to ask:
    28→
    29→```
    30→Question: "Which authentication method should we use?"
... [470 more lines]

500→  1361→layer:draw_text('99', 'large', x, y, r, sx, sy)  -- with optional transform
   501→  1362→```
   502→  1363→
   503→  1364→---
   504→  1365→
   505→  1366→## Rendering Architecture
   506→  1367→
   507→  1368→### Software Renderer
   508→  1369→
   509→  1370→Anchor uses a CPU-based software renderer targeting 480×270 or 640×360 resolution (depending on game). This approach provides direct pixel manipulation, simpler debugging, and consistent behavior across platforms.
   510→  1371→
   511→  1372→### Layers = Framebuffers
   512→  1373→
   513→  1374→Each layer is a framebuffer. Draw commands are batched per layer and flushed at end of frame:
   514→  1375→
   515→  1376→1. Lua calls `layer:circle()`, `layer:draw_image()`, etc.
   516→  1377→2. Each call appends to that layer's command buffer
   517→  1378→3. At end of frame, C processes all commands in a tight loop
   518→  1379→4. Effects are applied per-layer (C functions, configured from Lua)
   519→  1380→5. Layers composite to screen via alpha blending
   520→  1381→
   521→  1382→### Sprites
   522→  1383→
   523→  1384→Sprites use precomputed rotations (16 or 32 angles) with runtime scaling. This trades memory for computation and creates a distinctive aesthetic with discrete rotation angles.
   524→  1385→
   525→  1386→### Effects
   526→  1387→
   527→  1388→Post-processing effects are implemented in C and configured from Lua:
   528→  1389→
   529→... [180 more lines]</code></pre>
... [470 more lines]

3500→
  3501→</details>
  3502→
  3503→<details>
  3504→<summary><code>Grep (self:timer|@\\timer!)</code></summary>
  3505→
  3506→<pre><code>website/context/ANCHOR.md:312:self:timer()
  3507→website/context/ANCHOR.md:509:               self:timer()
  3508→website/context/ANCHOR.md:795:       @\timer!
  3509→website/context/ANCHOR.md:894:          self:timer()
  3510→website/context/ANCHOR.md:913:       @\timer!
  3511→website/context/ANCHOR.md:1045:    @\timer! unless @timers
  3512→website/context/ANCHOR.md:1057:    @\timer! unless @timers
  3513→website/context/dungeon.yue:260:    @\timer!
  3514→website/context/dungeon.yue:408:    @\timer!
  3515→website/context/snkrx.yue:102:       @\timer!
  3516→website/context/snkrx.yue:124:       @\timer!
  3517→website/context/snkrx.yue:145:    @\timer!
  3518→website/context/snkrx.yue:196:    @\timer!
  3519→website/context/snkrx.yue:279:    @\timer!
  3520→website/context/snkrx.yue:423:    @\timer!
  3521→website/context/swarm_survival.yue:125:    @\timer!
  3522→website/context/swarm_survival.yue:162:    @\timer!
  3523→website/context/swarm_survival.yue:266:    @\timer!
  3524→website/context/swarm_survival.yue:324:    @\timer!
  3525→website/context/swarm_survival.yue:375:    @\timer!
  3526→website/context/swarm_survival.yue:483:    @\timer!
  3527→website/context/CLAUDE.md:461:          self:timer()
  3528→website/context/CLAUDE.md:488:   ^ function(self) self:timer() end
  3529→website/context/CLAUDE.md:495:   ^ function(self) self:timer() end -- init after action, harder to follow
... [470 more lines]

5500→   124→--------------------------------------------------------------------------------
  5501→   125→-- SPAWNING PATTERNS</code></pre>
  5502→
  5503→</details>
  5504→
  5505→<details>
  5506→<summary><code>Edit (/home/adn/a327ex/Anchor/yue/operator_comparison.yue)</code></summary>
  5507→
  5508→<pre><code>The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  5509→   124→--------------------------------------------------------------------------------
  5510→   125→-- SPAWNING PATTERNS
  5511→   126→--------------------------------------------------------------------------------
  5512→   127→
  5513→   128→class arena extends object
  5514→   129→  spawn_ball: =&gt;
  5515→   130→    Y 'ball' ^ {x: 240, y: 135, vx: 100, vy: 100}
  5516→   131→             / (dt) =&gt;
  5517→   132→                 @x += @vx * dt
  5518→   133→                 @y += @vy * dt
  5519→   134→                 game\circle @x, @y, 8, an.colors.white
  5520→   135→             &gt;&gt; @
  5521→   136→    -- @ball now exists, old ball auto-killed if existed
  5522→   137→
  5523→   138→  spawn_particle: (x, y) =&gt;
  5524→   139→    Y! ^ {x: x, y: y, v: an\random_float 50, 100, r: an\random_angle!, duration: 0.5}
  5525→   140→       / (dt) =&gt;
  5526→   141→           @x += @v * math.cos(@r) * dt
  5527→   142→           @y += @v * math.sin(@r) * dt
  5528→   143→           @duration -= dt
  5529→   144→           return true if @duration &lt;= 0
... [470 more lines]

6500→<pre><code>The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  6501→   632→-- Named (self.timer.flash points to this, can be killed/replaced)
  6502→   633→self.timer:after(0.15, 'flash', function() self.flashing = false end)
  6503→   634→```
  6504→   635→
  6505→   636→**Actions** can use the `U`, `L`, and `X` helpers, or methods:
  6506→   637→```lua
  6507→   638→-- Anonymous actions with phase helpers
  6508→   639→E() / U(early_fn) / update_fn / L(late_fn) &gt;&gt; arena
  6509→   640→
  6510→   641→-- Named actions with phase helpers
  6511→   642→self / U('water_sim', fn)   -- named early
  6512→   643→self / X('update', fn)      -- named main
  6513→   644→self / L('draw', fn)        -- named late
  6514→   645→
  6515→   646→-- Named with methods (alternative)
  6516→   647→self:action('update', fn)
  6517→   648→self:early_action('water_sim', fn)
  6518→   649→self:late_action('water_draw', fn)
  6519→   650→
  6520→   651→-- Cancel later
  6521→   652→self.water_sim:kill()
  6522→   653→```
  6523→   654→
  6524→   655→The helpers are simply:
  6525→   656→```lua
  6526→   657→U = function(name_or_fn, fn) ... end  -- marks early phase
  6527→   658→L = function(name_or_fn, fn) ... end  -- marks late phase
  6528→   659→X = function(name, fn) return {[name] = fn} end  -- marks name only
  6529→   660→```
... [470 more lines]

1→# Session 2026-01-03 17:14
     2→
     3→---
     4→
     5→> Hi, Claude, do you know the AskUserQuestionTool?
     6→
     7→~~~
     8→Yes, I'm familiar with the AskUserQuestion tool. It's one of my available tools that allows me to ask you questions during our conversation when I need clarification, want to validate assumptions, or need help making decisions.
     9→
    10→**How it works:**
    11→
    12→- I can ask 1-4 questions at once
    13→- Each question has a short header (max 12 chars) displayed as a chip/tag
    14→- I provide 2-4 options per question, each with a label and description
    15→- You can always select "Other" to provide custom text input
    16→- There's a `multiSelect` option for questions where multiple answers apply
    17→
    18→**When I'd use it:**
    19→
    20→- Gathering your preferences or requirements
    21→- Clarifying ambiguous instructions
    22→- Getting decisions on implementation choices as I work
    23→- Offering choices about which direction to take
    24→
    25→**Example scenario:**
    26→
    27→If you asked me to "add authentication to the app," I might use AskUserQuestion to ask:
    28→
    29→```
    30→Question: "Which authentication method should we use?"
... [470 more lines]

500→  1361→layer:draw_text('99', 'large', x, y, r, sx, sy)  -- with optional transform
   501→  1362→```
   502→  1363→
   503→  1364→---
   504→  1365→
   505→  1366→## Rendering Architecture
   506→  1367→
   507→  1368→### Software Renderer
   508→  1369→
   509→  1370→Anchor uses a CPU-based software renderer targeting 480×270 or 640×360 resolution (depending on game). This approach provides direct pixel manipulation, simpler debugging, and consistent behavior across platforms.
   510→  1371→
   511→  1372→### Layers = Framebuffers
   512→  1373→
   513→  1374→Each layer is a framebuffer. Draw commands are batched per layer and flushed at end of frame:
   514→  1375→
   515→  1376→1. Lua calls `layer:circle()`, `layer:draw_image()`, etc.
   516→  1377→2. Each call appends to that layer's command buffer
   517→  1378→3. At end of frame, C processes all commands in a tight loop
   518→  1379→4. Effects are applied per-layer (C functions, configured from Lua)
   519→  1380→5. Layers composite to screen via alpha blending
   520→  1381→
   521→  1382→### Sprites
   522→  1383→
   523→  1384→Sprites use precomputed rotations (16 or 32 angles) with runtime scaling. This trades memory for computation and creates a distinctive aesthetic with discrete rotation angles.
   524→  1385→
   525→  1386→### Effects
   526→  1387→
   527→  1388→Post-processing effects are implemented in C and configured from Lua:
   528→  1389→
   529→... [180 more lines]</code></pre>
... [470 more lines]

1000→   383→local nearby = an:physics_query_circle(x, y, 50, {'enemy'})
  1001→   384→local hit = an:physics_raycast_closest(x1, y1, x2, y2, {'wall'})
  1002→   385→
  1003→   386→-- Current sensor overlaps (not just enter/exit events)
  1004→   387→local overlaps = an:physics_get_sensor_overlaps(sensor_collider)
  1005→   388→
  1006→   389→-- Body management
  1007→   390→local body = an:physics_create_body('ball', 'dynamic', 'circle', 10)
  1008→   391→an:physics_set_position(body, x, y)</code></pre>
  1009→
  1010→</details>
  1011→
  1012→Now let me remove Engine Services from ANCHOR.md. First the Table of Contents:
  1013→
  1014→<details>
  1015→<summary><code>Read (/home/adn/a327ex/Anchor/docs/ANCHOR.md)</code></summary>
  1016→
  1017→<pre><code>1→# Anchor Engine Specification
  1018→     2→
  1019→     3→*Anchor is a 2D game engine built around locality of behavior and minimal cognitive overhead. Code that belongs together stays together.*
  1020→     4→
  1021→     5→---
  1022→     6→
  1023→     7→## Table of Contents
  1024→     8→
  1025→     9→1. [Core Philosophy](#core-philosophy)
  1026→    10→2. [The Object Tree](#the-object-tree)
  1027→    11→3. [Lifecycle](#lifecycle)
  1028→    12→4. [Colliders, Springs, and Timers](#colliders-springs-and-timers)
  1029→    13→5. [Locality of Behavior](#locality-of-behavior)
... [470 more lines]

1500→> 8. Current Work:
  1501→>    Running final consistency check across all three documentation files. I had just started fixing issues when the summary was requested. I made one fix:
  1502→>    - Changed ANCHOR.md Deferred Features from "Advanced audio (pitch shifting, positional)" to "Positional audio (panning, 3D)" since pitch shifting is essential.
  1503→> 
  1504→> 9. Optional Next Step:
  1505→>    Continue fixing the remaining inconsistencies identified in the final check. The user explicitly requested: "run a final check across ANCHOR, ANCHOR_IMPLEMENTATION_PLAN and CLAUDE to catch and fix any inconsistencies, repeated sections, sections placed in the wrong file, etc."
  1506→>    
  1507→>    Next fixes to apply:
  1508→>    - Fix File Structure in ANCHOR.md to show single anchor.c
  1509→>    - Update CLAUDE.md to remove reference to removed Engine Services section
  1510→>    - Fix sound API in CLAUDE.md to use table format: `an:sound_play(bounce, {volume = speed / 100})`
  1511→>    - Decide on rectangle API (with or without rounded corners)
  1512→>    - Consolidate redundant rendering sections in ANCHOR.md.
  1513→> Please continue the conversation from where we left it off without asking the user any further questions. Continue with the last task that you were asked to work on.
  1514→
  1515→Continuing with the consistency fixes. Let me read the current state of all three files to make the remaining fixes:
  1516→
  1517→<details>
  1518→<summary><code>Read (/home/adn/a327ex/Anchor/docs/ANCHOR_IMPLEMENTATION_PLAN.md)</code></summary>
  1519→
  1520→<pre><code>1→# Anchor Implementation Plan
  1521→     2→
  1522→     3→C engine with YueScript scripting, OpenGL rendering, targeting Windows and Web.
  1523→     4→
  1524→     5→---
  1525→     6→
  1526→     7→## Summary of Key Decisions
  1527→     8→
  1528→     9→| Area | Decision | Rationale |
  1529→    10→|------|----------|-----------|
... [470 more lines]

2000→1. **File Structure** - Changed from multiple C files to single `anchor.c` monolithic structure
  2001→2. **Consolidated Rendering sections** - Merged "Rendering Architecture" and "OpenGL Implementation Notes" into a single "Rendering" section with all relevant subsections
  2002→3. **Removed Migration Path** - Deleted redundant section that duplicated the implementation plan
  2003→4. **Merged Build System + Resolution** - Combined sparse sections into "Build and Distribution" with Resolution, Build Scripts, and Distribution subsections
  2004→5. **Documented Colors** - Added Colors subsection explaining the `an.colors` palette system
  2005→6. **Clarified Timer initialization** - Updated Timer section to note that `after()`, `every()`, `tween()` auto-initialize, so explicit `self:timer()` is optional
  2006→7. **Updated Table of Contents** - Reflects all section changes
  2007→
  2008→**CLAUDE.md:**
  2009→1. **Updated "Read First"** - Changed "engine services vs object tree" to "object tree model (tree-based ownership, automatic cleanup)" since Engine Services section was removed
  2010→2. **Fixed Sound API** - Changed `an:sound_play(bounce_sound, speed / 100)` to `an:sound_play(bounce_sound, {volume = speed / 100})` to match table format
  2011→
  2012→**ANCHOR_IMPLEMENTATION_PLAN.md:**
  2013→1. **Fixed mouse_world_position** - Removed the `an:mouse_world_position(camera)` line since cameras are YueScript-side; added comment that world position is computed in YueScript using camera transform
  2014→
  2015→**Previously fixed (before context resumed):**
  2016→1. **Deferred Features** - Removed pitch shifting (it's essential, not deferred)
  2017→
  2018→> Run the same analysis again, but this time ask me questions for inconsistencies that are dubious and that you don't know the exact answer for. I also forgot to mention that I'm not on Linux, so by default the game will have to work on Linux too. ultrathink
  2019→
  2020→<details>
  2021→<summary><code>Read (/home/adn/a327ex/Anchor/docs/ANCHOR_IMPLEMENTATION_PLAN.md)</code></summary>
  2022→
  2023→<pre><code>1→# Anchor Implementation Plan
  2024→     2→
  2025→     3→C engine with YueScript scripting, OpenGL rendering, targeting Windows and Web.
  2026→     4→
  2027→     5→---
  2028→     6→
  2029→     7→## Summary of Key Decisions
... [470 more lines]

2500→<summary><code>Grep (@timers)</code></summary>
  2501→
  2502→<pre><code>1038:    @\timer! unless @timers
  2503→1044:      table.insert @timers, timer_obj
  2504→1046:      table.insert @timers, {delay: delay, elapsed: 0, fn: name_or_fn}
  2505→1050:    @\timer! unless @timers
  2506→1056:      table.insert @timers, timer_obj
  2507→1058:      table.insert @timers, {interval: interval, elapsed: 0, fn: name_or_fn, repeating: true}</code></pre>
  2508→
  2509→</details>
  2510→
  2511→<details>
  2512→<summary><code>Edit (/home/adn/a327ex/Anchor/docs/ANCHOR.md)</code></summary>
  2513→
  2514→<pre><code>The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  2515→  1032→    else
  2516→  1033→      table.insert @late_actions, {fn: name_or_fn}
  2517→  1034→    @
  2518→  1035→  
  2519→  1036→  -- Timers (internal @callbacks array stores scheduled after/every/tween entries)
  2520→  1037→  after: (delay, name_or_fn, fn) =&gt;
  2521→  1038→    @\timer! unless @callbacks
  2522→  1039→    if type(name_or_fn) == 'string'
  2523→  1040→      name, func = name_or_fn, fn
  2524→  1041→      @[name]\kill! if @[name] and @[name].kill
  2525→  1042→      timer_obj = {name: name, delay: delay, elapsed: 0, fn: func, kill: -&gt; @dead = true}
  2526→  1043→      @[name] = timer_obj
  2527→  1044→      table.insert @callbacks, timer_obj
  2528→  1045→    else
  2529→  1046→      table.insert @callbacks, {delay: delay, elapsed: 0, fn: name_or_fn}
... [470 more lines]

3000→655:    self:after(duration, 'stun_timer', function()</code></pre>
  3001→
  3002→</details>
  3003→
  3004→<details>
  3005→<summary><code>Read (/home/adn/a327ex/Anchor/.claude/CLAUDE.md)</code></summary>
  3006→
  3007→<pre><code>252→### Timers and Springs
  3008→   253→
  3009→   254→```lua
  3010→   255→-- Timers: after(duration, [name], callback)
  3011→   256→self:after(0.5, function() self:explode() end)                    -- Anonymous
  3012→   257→self:after(0.15, 'flash', function() self.flashing = false end)   -- Named
  3013→   258→
  3014→   259→-- Tween (provided by timer)
  3015→   260→self:tween(0.3, self, {x = 100}, math.cubic_out)
  3016→   261→
  3017→   262→-- Springs are child objects (each spring object IS one spring)
  3018→   263→self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping
  3019→   264→self.main:pull(0.5)
  3020→   265→
  3021→   266→-- Use spring in drawing
  3022→   267→game:push(self.x, self.y, 0, self.main.x, self.main.x)
  3023→   268→```
  3024→   269→
  3025→   270→### Death
  3026→   271→</code></pre>
  3027→
  3028→</details>
  3029→
... [470 more lines]

3500→
  3501→</details>
  3502→
  3503→<details>
  3504→<summary><code>Grep (self:timer|@\\timer!)</code></summary>
  3505→
  3506→<pre><code>website/context/ANCHOR.md:312:self:timer()
  3507→website/context/ANCHOR.md:509:               self:timer()
  3508→website/context/ANCHOR.md:795:       @\timer!
  3509→website/context/ANCHOR.md:894:          self:timer()
  3510→website/context/ANCHOR.md:913:       @\timer!
  3511→website/context/ANCHOR.md:1045:    @\timer! unless @timers
  3512→website/context/ANCHOR.md:1057:    @\timer! unless @timers
  3513→website/context/dungeon.yue:260:    @\timer!
  3514→website/context/dungeon.yue:408:    @\timer!
  3515→website/context/snkrx.yue:102:       @\timer!
  3516→website/context/snkrx.yue:124:       @\timer!
  3517→website/context/snkrx.yue:145:    @\timer!
  3518→website/context/snkrx.yue:196:    @\timer!
  3519→website/context/snkrx.yue:279:    @\timer!
  3520→website/context/snkrx.yue:423:    @\timer!
  3521→website/context/swarm_survival.yue:125:    @\timer!
  3522→website/context/swarm_survival.yue:162:    @\timer!
  3523→website/context/swarm_survival.yue:266:    @\timer!
  3524→website/context/swarm_survival.yue:324:    @\timer!
  3525→website/context/swarm_survival.yue:375:    @\timer!
  3526→website/context/swarm_survival.yue:483:    @\timer!
  3527→website/context/CLAUDE.md:461:          self:timer()
  3528→website/context/CLAUDE.md:488:   ^ function(self) self:timer() end
  3529→website/context/CLAUDE.md:495:   ^ function(self) self:timer() end -- init after action, harder to follow
... [470 more lines]

4000→   209→end
  4001→   210→```
  4002→   211→
  4003→   212→### Inline Objects
  4004→   213→</code></pre>
  4005→
  4006→</details>
  4007→
  4008→<details>
  4009→<summary><code>Read (/home/adn/a327ex/Anchor/.claude/CLAUDE.md)</code></summary>
  4010→
  4011→<pre><code>260→self.timer:after(0.15, 'flash', function() self.flashing = false end)   -- Named
  4012→   261→
  4013→   262→-- Tween (provided by timer)
  4014→   263→self.timer:tween(0.3, self, {x = 100}, math.cubic_out)
  4015→   264→
  4016→   265→-- Springs are child objects (each spring object IS one spring)
  4017→   266→self + spring('main', 1, 200, 10)   -- name, initial, stiffness, damping
  4018→   267→self.main:pull(0.5)
  4019→   268→
  4020→   269→-- Use spring in drawing
  4021→   270→game:push(self.x, self.y, 0, self.main.x, self.main.x)
  4022→   271→```
  4023→   272→
  4024→   273→### Death
  4025→   274→
  4026→   275→```lua
  4027→   276→-- kill() recursively sets .dead = true on self and all children
  4028→   277→-- Actual removal happens at end-of-frame
  4029→   278→self:kill()
... [570 more lines]

4600→>    - Collider/spring/timer are all proper tree objects extending `object`
  4601→>    - Dead actions: Separate cleanup pass handles them
  4602→> 
  4603→> 5. **Engine Object Pattern Clarification**:
  4604→>    - User clarified that spring was previously multiple springs internally
  4605→>    - New pattern: default name is class name, optional explicit name for multiples
  4606→>    - `spring()` → `self.spring`, `spring('attack')` → `self.attack`
  4607→>    - Same for timer and collider
  4608→> 
  4609→> 6. **Collider Naming**: User confirmed collider has separate optional name parameter, defaulting to 'collider'. The physics tag is separate from tree name.
  4610→> 
  4611→> 7. **Final Request**: User asked to add mention in all documents that engine objects are named after themselves by default when added as children.
  4612→> 
  4613→> 8. **Files Modified**:
  4614→>    - ANCHOR.md: Multiple sections updated
  4615→>    - ANCHOR_IMPLEMENTATION_PLAN.md: Phase 10, Engine Object Pattern
  4616→>    - CLAUDE.md: Timers/Springs/Colliders section, examples
  4617→> 
  4618→> 9. **All the changes made**:
  4619→>    - Linux platform status updated
  4620→>    - Build scripts updated
  4621→>    - Color format simplified (removed [0])
  4622→>    - Timer architecture changed to child object pattern
  4623→>    - Engine object pattern documented
  4624→>    - Factory function concept removed
  4625→>    - Spring examples fixed
  4626→>    - Collider naming pattern fixed
  4627→>    - Renamed @timers to @callbacks
  4628→>    - Layer order documented
  4629→>    - Methods + actions documented
... [670 more lines]

5300→- Named versions need separate helpers: `/ U 'physics', (dt) =>`, `/ L 'draw', (dt) =>`
  5301→- Introduces two new single-letter globals (U and L)
  5302→
  5303→**X prefix approach:**
  5304→- Anonymous early/late require X: `/ X '<', (dt) =>` — more verbose
  5305→- Named versions are compact: `/ X '<physics', (dt) =>` — the prefix is part of the name
  5306→- Reuses existing X helper, no new globals
  5307→- The `<` and `>` have natural "before/after" meaning (arrows pointing left/right on a timeline)
  5308→
  5309→The tradeoff is basically:
  5310→- **U/L**: Cleaner for anonymous actions, but adds two globals
  5311→- **X prefix**: More verbose for anonymous, but unified under one mechanism
  5312→
  5313→> We could use E for early and another letter for object itself. What do you think?
  5314→
  5315→~~~
  5316→Interesting idea. If E becomes Early, we need a new letter for object. From the runic set (E, X, A, T, L, V, U, Y, I, H):
  5317→
  5318→| Letter | Mnemonic | Feel |
  5319→|--------|----------|------|
  5320→| **O** | Object | Obvious, but breaks runic rule (round) |
  5321→| **T** | Thing | Casual, clear, runic |
  5322→| **U** | Unit | Game-y, runic |
  5323→| **I** | Instance | Technical, runic |
  5324→
  5325→How they'd read:
  5326→
  5327→```yuescript
  5328→-- O for Object (breaks runic, but immediately obvious)
  5329→O 'ball' ^ {x: 100}
... [570 more lines]

5900→    91→    -- Named main action
  5901→    92→    @ / N 'update', (dt) =>
  5902→    93→      -- game logic
  5903→    94→
  5904→    95→    -- Named late action
  5905→    96→    @ / L 'water_draw', (dt) =>
  5906→    97→      for spring in *@water_springs.children
  5907→    98→        -- build polyline
  5908→    99→
  5909→   100→  pause_water: =>
  5910→   101→    @water_sim\kill! if @water_sim
  5911→   102→    @water_draw\kill! if @water_draw</code></pre>
  5912→
  5913→</details>
  5914→
  5915→<details>
  5916→<summary><code>Edit (/home/adn/a327ex/Anchor/yue/operator_comparison.yue)</code></summary>
  5917→
  5918→<pre><code>The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  5919→   111→      + paddle 'left', 30, 135
  5920→   112→      + paddle 'right', 450, 135
  5921→   113→      + { wall 'top', wall 'bottom' }
  5922→   114→
  5923→   115→-- Inline object in hierarchy (needs parens)
  5924→   116→arena + paddle 'left', 30, 135
  5925→   117→      + paddle 'right', 450, 135
  5926→   118→      + (X 'ball' ^ {x: 240, y: 135}
  5927→   119→                  / (dt) =&gt;
  5928→   120→                      @x += @vx * dt
  5929→   121→                      game\circle @x, @y, 8, colors.white)
... [470 more lines]

1→     1→# Session 2026-01-03 17:14
     2→     2→
     3→     3→---
     4→     4→
     5→     5→> Hi, Claude, do you know the AskUserQuestionTool?
     6→     6→
     7→     7→~~~
     8→     8→Yes, I'm familiar with the AskUserQuestion tool. It's one of my available tools that allows me to ask you questions during our conversation when I need clarification, want to validate assumptions, or need help making decisions.
     9→     9→
    10→    10→**How it works:**
    11→    11→
    12→    12→- I can ask 1-4 questions at once
    13→    13→- Each question has a short header (max 12 chars) displayed as a chip/tag
    14→    14→- I provide 2-4 options per question, each with a label and description
    15→    15→- You can always select "Other" to provide custom text input
    16→    16→- There's a `multiSelect` option for questions where multiple answers apply
    17→    17→
    18→    18→**When I'd use it:**
    19→    19→
    20→    20→- Gathering your preferences or requirements
    21→    21→- Clarifying ambiguous instructions
    22→    22→- Getting decisions on implementation choices as I work
    23→    23→- Offering choices about which direction to take
    24→    24→
    25→    25→**Example scenario:**
    26→    26→
    27→    27→If you asked me to "add authentication to the app," I might use AskUserQuestion to ask:
    28→    28→
    29→    29→```
    30→    30→Question: "Which authentication method should we use?"
... [472 more lines]

6400→   458→For elegance, Anchor provides single-letter aliases that look like runes:
  6401→   459→
  6402→   460→| Alias | Purpose | Mnemonic |
  6403→   461→|-------|---------|----------|
  6404→   462→| `E` | Object constructor | Entity |
  6405→   463→| `U` | Early action helper | Under/underlying |
  6406→   464→| `L` | Late action helper | Late |
  6407→   465→| `X` | Named action helper | eXplicit |
  6408→   466→| `A` | Query descendants | All |
  6409→   467→
  6410→   468→These are defined in the engine:
  6411→   469→
  6412→   470→```lua
  6413→   471→E = object
  6414→   472→U = function(fn) return {__early = fn} end
  6415→   473→L = function(fn) return {__late = fn} end
  6416→   474→X = function(name, fn) return {[name] = fn} end
  6417→   475→-- A is a method alias: self:A('tag') == self:all('tag')
  6418→   476→```
  6419→   477→
  6420→   478→**Future single-letter aliases** should prefer these characters, chosen for their angular, runic appearance (symmetrical, minimal roundness):
  6421→   479→
  6422→   480→```</code></pre>
  6423→
  6424→</details>
  6425→
  6426→<details>
  6427→<summary><code>Edit (/home/adn/a327ex/Anchor/docs/ANCHOR.md)</code></summary>
  6428→
  6429→<pre><code>The file /home/adn/a327ex/Anchor/docs/ANCHOR.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
... [670 more lines]

7100→   523→3. Late phase — all `late_update` and `/ L` actions
  7101→   524→4. Cleanup — remove dead objects, call `destroy` hooks
  7102→   525→
  7103→   526→### 10.7 Aliases
  7104→   527→```yuescript
  7105→   528→E = object
  7106→   529→U = (name_or_fn, fn) -> if fn then {__early: name_or_fn, __fn: fn} else {__early: name_or_fn}
  7107→   530→L = (name_or_fn, fn) -> if fn then {__late: name_or_fn, __fn: fn} else {__late: name_or_fn}
  7108→   531→X = (name, fn) -> {[name]: fn}
  7109→   532→-- A is method alias for all()
  7110→   533→```
  7111→   534→
  7112→   535→**Deliverable:** Full object system matching ANCHOR.md specification.
  7113→   536→
  7114→   537→---</code></pre>
  7115→
  7116→</details>
  7117→
  7118→Now let me clean up the comparison file to be a proper reference example:
  7119→
  7120→<details>
  7121→<summary><code>Edit (/home/adn/a327ex/Anchor/yue/operator_comparison.yue)</code></summary>
  7122→
  7123→<pre><code>The file /home/adn/a327ex/Anchor/yue/operator_comparison.yue has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
  7124→     1→-- Anchor Operator Examples
  7125→     2→--
  7126→     3→-- Single-letter aliases:
  7127→     4→--   E = object (Entity)
  7128→     5→--   U = early action (Under/underlying)
  7129→     6→--   L = late action (Late)
... [243 more lines]

1→# Session 2026-01-03 17:14
     2→
     3→---
     4→
     5→> Hi, Claude, do you know the AskUserQuestionTool?
     6→
     7→~~~
     8→Yes, I'm familiar with the AskUserQuestion tool. It's one of my available tools that allows me to ask you questions during our conversation when I need clarification, want to validate assumptions, or need help making decisions.
     9→
    10→**How it works:**
    11→
    12→- I can ask 1-4 questions at once
    13→- Each question has a short header (max 12 chars) displayed as a chip/tag
    14→- I provide 2-4 options per question, each with a label and description
    15→- You can always select "Other" to provide custom text input
    16→- There's a `multiSelect` option for questions where multiple answers apply
    17→
    18→**When I'd use it:**
    19→
    20→- Gathering your preferences or requirements

The file /home/adn/a327ex/Anchor/website/logs/2026-01-03_15-30.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
     1→# Anchor Interview
     2→
     3→## Summary
     4→
     5→This session began with a comprehensive interview to improve the implementation plan, leading to a major renderer decision, followed by consistency fixes and an operator redesign.
     6→
     7→**Implementation Plan Interview:**
     8→- Conducted detailed interview using AskUserQuestion tool covering all engine requirements
     9→- Software renderer motivations discussed: aesthetic, simplicity, web reliability
    10→- Key discoveries that changed the calculus:
    11→  - Discrete rotation was only "acceptable tradeoff" — not a desired aesthetic
    12→  - Additive blending is essential (explosions, energy effects)
    13→  - Console targets (Switch, Xbox, PlayStation) require GPU APIs — incompatible with software rendering
    14→  - You already know GLSL and have written 500+ line shaders; the concern was preference, not capability
    15→  - Pixel control examples were mostly theoretical (Noita-style) rather than needed for ball combat games
    16→- Audio gap identified: SDL_mixer insufficient (no pitch shifting), needs research (miniaudio vs SoLoud)
    17→- Physics confirmed: Box2D 3.x, fixed 60fps timestep for determinism
    18→- Platform targets: Windows, Linux, Web primary; mobile/console if games succeed
    19→- Debug workflow: print debugging + error screen sufficient
    20→- C structure: single `anchor.c`, resources live forever, single executable distribution
    21→- Distant artistic vision revealed: "7 stories that are 7 games" with merged game/narrative elements
    22→- **Final decision: OpenGL** — clean decision with no "software-like mental model" compromise
    23→
    24→**Documentation Updates:**
    25→- Created new `ANCHOR_IMPLEMENTATION_PLAN.md` with OpenGL, 10 phases, TBD audio
    26→- Deleted old `IMPLEMENTATION_PLAN.md` (software renderer based)
    27→- Updated ANCHOR.md: removed software renderer sections (~200 lines), added OpenGL rendering
    28→- Updated CLAUDE.md: changed references from software rendering to OpenGL
    29→
... [43 more lines]

On branch main
Your branch is up to date with 'origin/main'.

Changes to be committed:
  (use "git restore --staged <file>..." to unstage)
    modified:   .claude/CLAUDE.md
    modified:   docs/ANCHOR.md
    new file:   docs/ANCHOR_IMPLEMENTATION_PLAN.md
    deleted:    docs/IMPLEMENTATION_PLAN.md
    modified:   website/context/ANCHOR.md
    new file:   website/context/ANCHOR_IMPLEMENTATION_PLAN.md
    modified:   website/context/CLAUDE.md
    new file:   website/logs/2026-01-03_15-30.md
    new file:   yue/examples.yue

[main 84c416e] Anchor Interview
 10 files changed, 9574 insertions(+), 2140 deletions(-)
 create mode 100644 docs/ANCHOR_IMPLEMENTATION_PLAN.md
 delete mode 100644 docs/IMPLEMENTATION_PLAN.md
 create mode 100644 website/context/ANCHOR_IMPLEMENTATION_PLAN.md
 delete mode 100644 website/context/IMPLEMENTATION_PLAN.md
 create mode 100644 website/logs/2026-01-03_15-30.md
 create mode 100644 yue/examples.yue

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Anchor Interview

This session began with a comprehensive interview to improve the implementation plan, leading to a major renderer decision, followed by consistency fixes and an operator redesign.

Implementation Plan Interview:

- Conducted detailed interview using AskUserQuestion tool covering all engine requirements
- Software renderer motivations discussed: aesthetic, simplicity, web reliability
- Key discoveries: discrete rotation was acceptable tradeoff not desired aesthetic; additive blending essential; console targets require GPU APIs; already know GLSL (500+ line shaders)
- Audio gap identified: SDL_mixer insufficient (no pitch shifting), needs research
- Final decision: OpenGL — clean decision with no software-like mental model compromise

Documentation Updates:

- Created new ANCHOR_IMPLEMENTATION_PLAN.md with OpenGL, 10 phases, TBD audio
- Deleted old IMPLEMENTATION_PLAN.md (software renderer based)
- Updated ANCHOR.md and CLAUDE.md to remove software renderer references

Consistency Fixes:

- Timer architecture: child object with after/every/tween methods via self.timer:after(...)
- Engine object pattern: timer/spring/collider named after themselves by default
- Spring examples: single springs use spring(1, 200, 10) → self.spring
- Changed add_child → add in reference implementation

Operator Redesign:

- Replaced % (early) and // (late) with unified / operator using phase helpers
- Final aliases: E (object), U (early), L (late), X (named), A (all)
- Helper signatures support both U(fn) and U('name', fn) forms

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

1→# CLAUDE.md
     2→
     3→Guidelines for Claude Code instances working on Anchor and games built with it.
     4→
     5→---
     6→
     7→## Read First
     8→
     9→Read `docs/ANCHOR.md` before doing anything. It covers:
    10→- The object tree model (tree-based ownership, automatic cleanup)
    11→- How objects, timers, springs, and colliders work
    12→- The action-based vs rules-based spectrum
    13→- Technical implementation details (OpenGL rendering, Box2D physics)
    14→
    15→**For the reasoning behind these decisions** — why the engine works the way it does, how to evaluate new features, the developer's working style — see the [Anchor Context Brief](#anchor-context-brief) at the end of this document.
    16→
    17→---
    18→
    19→## Session Workflow
    20→
    21→**Every Claude Code session follows this workflow.**
    22→
    23→### During Session
    24→
    25→- Work normally on requested tasks
    26→- Update `docs/ANCHOR.md` when APIs or architecture changes
    27→- Update `docs/ANCHOR_IMPLEMENTATION_PLAN.md` when tasks are completed
    28→- Update this file (`CLAUDE.md`) when new patterns or conventions are established
    29→
    30→### End of Session
... [70 more lines]

The file /home/adn/a327ex/Anchor/.claude/CLAUDE.md has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
    61→   ```bash
    62→   cp .claude/CLAUDE.md docs/* website/context/
    63→   ```
    64→
    65→9. **Commit everything** with title as subject line, full summary as body, and co-authorship:
    66→   ```bash
    67→   git add -A
    68→   git commit -m "Title
    69→
    70→   Full summary here (EXACT same text as in the log file)...
    71→
    72→   🤖 Generated with [Claude Code](https://claude.com/claude-code)
    73→
    74→   Co-Authored-By: Claude <noreply@anthropic.com>"
    75→   ```
    76→
    77→   **Important:**
    78→   - The commit body must be the EXACT same full summary written to the log file — do not condense or abbreviate
    79→   - Always include the robot line and `Co-Authored-By` so commits show as authored by both of us
    80→
    81→10. **Push to GitHub**:
    82→    ```bash
    83→    git push origin main

[main bebda96] Anchor Interview
 Date: Sat Jan 3 17:30:08 2026 -0300
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 create mode 100644 docs/ANCHOR_IMPLEMENTATION_PLAN.md
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 create mode 100644 website/logs/2026-01-03_15-30.md
 create mode 100644 yue/examples.yue

Anchor Interview

## Summary

This session began with a comprehensive interview to improve the implementation plan, leading to a major renderer decision, followed by consistency fixes and an operator redesign.

**Implementation Plan Interview:**

- Conducted detailed interview using AskUserQuestion tool covering all engine requirements
- Software renderer motivations discussed: aesthetic, simplicity, web reliability
- Key discoveries that changed the calculus:
  - Discrete rotation was only "acceptable tradeoff" — not a desired aesthetic
  - Additive blending is essential (explosions, energy effects)
  - Console targets (Switch, Xbox, PlayStation) require GPU APIs — incompatible with software rendering
  - You already know GLSL and have written 500+ line shaders; the concern was preference, not capability
  - Pixel control examples were mostly theoretical (Noita-style) rather than needed for ball combat games
- Audio gap identified: SDL_mixer insufficient (no pitch shifting), needs research (miniaudio vs SoLoud)
- Physics confirmed: Box2D 3.x, fixed 60fps timestep for determinism
- Platform targets: Windows, Linux, Web primary; mobile/console if games succeed
- Debug workflow: print debugging + error screen sufficient
- C structure: single `anchor.c`, resources live forever, single executable distribution
- Distant artistic vision revealed: "7 stories that are 7 games" with merged game/narrative elements
- **Final decision: OpenGL** — clean decision with no "software-like mental model" compromise

**Documentation Updates:**

- Created new `ANCHOR_IMPLEMENTATION_PLAN.md` with OpenGL, 10 phases, TBD audio
- Deleted old `IMPLEMENTATION_PLAN.md` (software renderer based)
- Updated ANCHOR.md: removed software renderer sections (~200 lines), added OpenGL rendering
- Updated CLAUDE.md: changed references from software rendering to OpenGL

**Consistency Fixes (multiple rounds, including pre-compaction work):**

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