# START HERE — V412 continuous traveling lateral lunge

Current checkpoint: `NEXT11_V412_CONTINUOUS_TRAVEL_CAMERA_FOLLOW_FULL_ROOT`.

Read `HANDOVER_V412_CONTINUOUS_TRAVEL_CAMERA_FOLLOW.md` first.

Production asset:

- `assets/nexprod/resolved/lateral-lunges-v412-continuous-travel-camera-follow.resolved.json`
- profile: `warmup_lateral_lunge_ik_v1`
- exercise: `lateral-lunges`
- duration: 6.6 s
- runtime: `assets/nexprod/nexprod01-resolved-playback-v412.mjs`
- player: `assets/nexprod/nexprod01-resolved-player-v412.html`

Stop boundary: V411 bone animation, foot/ankle geometry and centered display curve are preserved exactly. V412 owns only continuous motion-space unwrapping, loop accumulation, camera-relative presentation and wiring. Do not reopen IK or add a live solver to adjust presentation.

Run the deterministic gates:

```bash
node tools/nexprod/build_v412_continuous_travel_camera_follow.mjs .
node tools/nexprod/check_v412_continuous_travel_camera_follow.mjs .
```

The integration gate must report `pass: true`, zero seam jumps and `liveSolverCalls: 0`.