[laneC] log: M1 done

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

logs/laneC.md

@@ -8,4 +8,30 @@ Format per session:
     BLOCKED/REQUESTS: …
     NEXT: …
 
-(no sessions yet)
+## 2026-07-18 session 1
+DONE: M1 code-complete. Commit bb85eef.
+- `requirements.txt` (fastapi, uvicorn only); `.gitignore` += `.venv/`.
+- `scenegod/server.py` single file: statics (`/` no-store placeholder,
+  `/web/{path}` short-cache, path-guarded), `/assets/tree` (5s cache,
+  per-category grouping), `/assets/file` (traversal-guarded), `/scenes`
+  CRUD with atomic write + slugify + `validate_scene`, render endpoints
+  (begin/frame accept + save; end/status/out 501 until M3).
+- `scripts/test_server.py`: 5 groups green (tree grouping, file stream,
+  4 traversal attempts rejected, scene round-trip w/ slugify, 5 validation
+  failures + 1 fade-overlap-allowed). `OK: 5 test groups passed`.
+DECISIONS:
+- System python3 is 3.14 (fastapi present but pydantic missing); made a
+  `.venv` on python3.11 per CLAUDE.md stack rule. Tests + server use
+  `.venv/bin/python`. `.venv/` gitignored.
+- `web/` is under `scenegod/web/` per PLAN §2 (not repo root) — `WEB`
+  points there; Lane A/B statics resolve via `/web/{path}`.
+- Asset grouping: per-category primary ext set (models for chars/anims/
+  props, images for backdrops, audio for audio). Non-primary image sharing
+  a stem → `thumb`, not a `format`. `path` prefers glb else first model.
+  Entries with no primary format dropped (thumb-only stems aren't assets).
+- Clip-overlap check: violation if `next.start < a.end - a.fade`, where
+  `a.end = start + (out-in)*loop`. Fade-region overlap allowed.
+BLOCKED/REQUESTS: none.
+NEXT: M2 (when unlocked): scene-validation hardening + asset thumbnails
+endpoint. M3 render pipeline (ffmpeg encode + web/render.js) is designed in
+C-server.md §C5, endpoints already stubbed — implement at SYNC-2/M3.