The reference six-lever controller: Platformer component (jump feel as data),
decomposed input/move/gravity/jump/anim engine sub-systems (each disable-able),
JumpRequested/Landed/StateChanged events, gravity policy enum, and the opt-in
scaffolding (moving/crumble platforms w/ rider carry, pickups+score, springs,
hazards+Life, checkpoints/goal). Reuses the shared esys_move collision.
Also fixes a latent SSA-name collision in ludic_sweep_entity that triggered
once a program declared >=11 events. Reseeded; C-free fixpoint holds.
3 new regression cases (100 passed, 0 failed).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>