Foundation (M0 + M3 + frozen contracts): scaffold, synthetic fixtures, full API
What now works:
- M0 scaffold: pyproject (all spec deps), uv/py3.12 env, `python -m festival4d`
CLI registering synthetic|ingest|sync|reconstruct|events|serve. Vite hello page.
- Synthetic fixture (synthetic.py): 3 shifted-audio videos (offsets 0/+1370/-842 ms),
camera-arc poses, stage point cloud -> points.ply, seeded events + anchors,
ground_truth.json. `python -m festival4d synthetic` populates data/ + DB.
- DB schema exactly per spec §2 (db.py) + CRUD helpers all lanes use.
- M3 API (api.py) full against synthetic data: manifest/poses/pointcloud/anchors/
events/detect/annotations; Range-capable video serving (206 verified); CORS for any
localhost origin.
- Frozen geometry contract: geometry.colmap_to_threejs (M5 math) + unit test (3 known
vectors, random round-trip, scipy oracle); mirrored frontend/src/lib/pose.js with
identical POSE_TEST_VECTORS. Lane-B stubs: slerp_pose, ray_from_pixel, triangulate_rays,
nearest_point_on_ray.
- Classifier contract (events_ai.py): MomentClassification model + MomentClassifier
protocol + Gemini/Claude/Local provider stubs.
- Lane-owned modules stubbed with final signatures (ingest, audio_sync, frames, sfm,
events_ai); cli/api catch NotImplementedError and degrade gracefully.
- plan/CHANGE_REQUESTS.md created; plan/status/foundation.md updated.
Acceptance: pytest 24 passed; serve endpoints verified via curl + browser (video seek,
manifest fetch cross-origin, pose.js self-test, 0 console errors).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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