# js/levels/ — agents.md
RC-375D84 S-2. Module map: `MODULES.md`; runtime model: `architecture.md`.

The levels **module** (aggregator). Shared scope `L`.

- `index.js` runs helpers first (constructors + SLING anchor), then one installer
  per level, and exports `ISLE_LEVELS = { LEVELS, SLING }` — key-for-key stable.
- Level objects: `id, name, birds[], sling, stars[3] (ascending), decor, blocks[]
  (centers! x,y = block CENTER), enemies[] (x,y = enemy center)`. The
  level-integrity test enforces world bounds, support (ground or flat block top)
  and non-decreasing enemy-HP difficulty — keep new levels honest.
- Adding level 6+ = add `data/level-6.js` + register it in index.html AND in the
  aggregator's browser part-list expectation (order = difficulty order).
- Do not import from physics; levels are pure data plus the constructor helpers.