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

Installs into `P`: launch, triggerAbility.

- `launch(g, vx, vy)` performs the turn transition (aiming -> flying, launched
  counter, active-bird advance on settle).
- `triggerAbility(g)` implements the three mid-flight moves (fury / dive /
  quake) keyed off the active bird's type and `ABILITY_CD`. Each slinger's move
  is pinned by the "abilities" test arm (distinct, usable, no-op when
  unavailable).
- Consumes: activeBird, aimVector, MATERIALS, BIRD_TYPES.