Modes: Cruise / Crash Mode (60s damage dollars) / Race (3 laps, rubber-banded
rivals). Burnout loop: boost earned by drift, near miss, smash; takedowns refill
and grow the meter to 4x; hard crashes shed det_* panels and trigger Impact Time
slow-mo. Traffic follows the level RacePath frozen-kinematic and goes dynamic
when whacked. tools/build_cars.py builds six Aussie shitbox GLBs (profile
extrusion + detachable doors/mirrors/bumpers/bonnet/boot). Smoke test covers
all three modes headless.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
