# V415 — lateral lunge clean right-foot release

Base: V414 exact travel sequence.

## Preserved authority
Exact movement remains:
`lunge left -> lunge right -> right foot gathers to left -> left foot steps out -> repeat`.

Preserved verbatim from V414 outside the surgical patch:
- left/right lunge geometry;
- both-foot plant through the left-to-right lunge transfer;
- left-foot authority during right-foot gather;
- right-foot authority during left-foot step-out;
- 4.5 s / 720-frame cycle;
- motion-space travel and centered camera-follow;
- root transforms and presentation track;
- upper body and left leg.

## V415 surgical fix
Human QA identified a tiny right-foot down/up pulse at release from the right-lunge plant.

Frames 351–375 were rebuilt only for the deformation-chain right leg:
- R_Thigh
- R_Calf
- R_Foot whose parent is R_Calf

The right-foot world trajectory is blended continuously from the exact V414 planted pose into the existing V414 gather trajectory. The first movement after plant is upward/away from contact; there is no downward preload or re-contact.

The FBX contains duplicate bone names, including two R_Foot bones. V415 explicitly targets the deformation-chain R_Foot under R_Calf; the duplicate attachment R_Foot is not used as contact authority and is untouched.

## Machine QA
PASS:
- initial release ΔY: positive;
- minimum release ΔY: positive;
- first release position step < 0.5 mm;
- max release foot-orientation step ≈ 0.13°;
- V414 plant authority retained;
- V414 cycle travel retained exactly;
- zero changed bone quaternions outside frames 351–375;
- zero changed bone quaternions outside the right-leg whitelist;
- 0 live solver calls.

Actual Nex FBX CPU-skinned QA rendered at 12 fps (two loops) and 30 fps (one loop).
Human visual acceptance: PENDING.
Chromium/WebGL parity: NOT CLAIMED.