# Code map

Use this as the first lookup table before opening large files.

| Need | File / symbol |
|---|---|
| Script order / DOM shell | `index.html` |
| Global config, sprites, object metrics | `js/data.js` / `CONFIG`, `SPRITES`, `IMAGE_METRICS` |
| Lazy image loading | `js/assets.js` / `loadInitialImages`, `loadDeferredImages`, `getRenderableImage` |
| UI Japanese text catalog | `js/text_catalog.js` / `TEXT_CATALOG` |
| Core agent state | `js/tarinai.js` / `class Tarinai` constructor |
| Agent AI target choice | `js/tarinai.js` / `resolveNeeds`, target helpers |
| Disease state transitions | `js/tarinai.js` / `infect*`, `recover*`, `update*Disease*` |
| Damage/death cause rules | `js/health.js` / `HEALTH` |
| Item creation/lifecycle/draw | `js/items.js` / `class Item` |
| Cleaning, rain, placement | `js/world.js` / placement/update interaction helpers |
| Fence collision | `js/world.js` / `resolveFenceCollision` |
| Logs/archive | `js/world.js` |
| Main renderer | `js/render.js` / `render` helpers |
| Agent drawing | `js/tarinai.js` / `draw` |
| Input/tools/dialogs | `js/ui.js` |
| Statistics UI | `js/ui_charts.js` |
| Family tree UI | `js/ui_family.js` |

Refactor guidance: extract isolated rule sets into small helper files, then delegate from `Tarinai`/`World`. Keep shared domain terms centralized (`HEALTH`, `TEXT_CATALOG`, `CONFIG`) to reduce repeated prompt context.