# HANDOVER — V396 Butt Kick Run Foot Cleanup

## Authority
- Base: V395
- exerciseId: `butt-kick-run`
- canonical profile: `warmup_butt_kick_run_ik_v1`
- no new IK profile
- no new solver
- production: resolved playback, 0 live solver calls

## What changed
Only foot/ToeBase authoring targets. The peak foot is made visually neutral/relaxed; support and mid-phase feet are biased away from heel-strike toward athletic forefoot/midfoot contact.

## What is locked from V395
- source film and hashes
- 4.0 s / 10-kick source timing
- 0.4 s alternating cadence
- per-frame event timeline
- kick height/amplitude
- torso/head
- running arms

The integration audit confirms identical timing/event data and max upper-body quaternion drift of only 0.005662 degrees.

## QA
- `diagnostics/v396/V396_BUTT_KICK_RUN_BUILD_REPORT.json`: PASS
- `diagnostics/v396/V396_BUTT_KICK_RUN_INTEGRATION_CHECK.json`: PASS
- `diagnostics/v396/V396_BUTT_KICK_RUN_FOOT_CLEANUP_CPU_SKINNED_MESH_TWO_LOOP_QA.mp4`: PASS
- Chromium/WebGL: not claimed
- human acceptance: pending

## Stop boundary
If the feet are visually approved, lock V396 and continue to the next exercise. Do not use a new exercise-specific solver.