SCENEGOD/logs/laneC.md

Lane C log — append-only, newest at bottom

Format per session:

## <date> session N
DONE: …
DECISIONS: …
BLOCKED/REQUESTS: …
NEXT: …

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.

2026-07-18 session 2

DONE: M2 thumbnails + M3 render pipeline (orchestrator green-lit both). Commit b627a0f.

• /render/begin (uuid dir + meta.json, 503 if no ffmpeg), /frame/{n} (PNG->frames/{n:06d}.png, 400 on empty), /end (spawns bg ffmpeg thread: libx264 crf18 yuv420p, 400 if no frames), /status (queued|encoding| done|error+log tail; on-disk out.mp4 fallback after restart), /out.mp4.
• Boot-time reap_renders() deletes render dirs >48h.
• /assets/thumb?path= serves same-stem image sidecar (404 if none).
• web/render.js: draftRecord (MediaRecorder webm), finalRender (timeline.step -> renderActiveCamera -> toBlob -> POST, <=4 in flight, resize+restore renderer), download() helper. node --check clean.
• test_server.py: added render group (ffmpeg lavfi -> 30 PNGs -> begin -> post -> end -> poll -> ffprobe duration ~1s) + thumbnail asserts. OK: 6 test groups passed. DECISIONS:
• Render state in-memory (single-process local tool); status() infers from disk after a restart. ponytail-commented.
• Thumbnails pass-through, no resize — Pillow would be a new dep (stack rule says log a REQUEST first); not worth it until dock load is measurably slow.
• finalRender total frames = round(duration*fps); relies on timeline.step being deterministic (orchestrator verified). BLOCKED/REQUESTS:
• finalRender's per-frame path depends on Lane A stage.renderActiveCamera as a real render target (their M2). Server + ffmpeg path fully tested with synthetic frames; the browser client path is unexercised until A lands it. NEXT: M4 is locked. When unlocked: ffmpeg audio mux (scene audio[]), /mb/submit MODELBEAST proxy, scripts/graft_limb.py. Meanwhile available to integration-test finalRender once Lane A's renderActiveCamera lands.

2026-07-18 session 3

DONE: M4 complete (unlocked after SYNC 3). Commit be65355.

• Audio mux: /render/end now accepts {audio:[{path,start,gain}]}, muxes via ffmpeg adelay+volume+amix -> aac -shortest; audio paths path-guarded (400 on missing). render.js finalRender passes opts.audio through.
• scripts/graft_limb.py: headless Blender (blender -b -P ... -- --body B --limb L --bone NAME --out O). Align limb root head->target bone world head, join armatures, parent limb root under target (keep offset), join meshes (vgroup weights survive). Refusal: overlapping bones -> GraftRefused -> exit 2 "re-skin, don't graft". No finish/decimate. --selftest builds synthetic body/limb GLBs and verifies refusal + graft paths under Blender.
• /mb/submit: MODELBEAST proxy, SCENEGOD_MB=1 gated (503 otherwise), token from ~/Documents/backnforth/.env at request time (never logged; errors scrub it), /api/assets multipart -> /api/jobs, mirrors meshgod/ops.py.
• test_server.py: 8 groups green (added audio-stream assert, MB gating, MB two-step contract via in-process mock — no farm jobs). DECISIONS:
• Blender 5 glTF importer injects a stray unparented 42-vert icosphere on every import; _import now keeps only rig-connected meshes (parented to armature / has vgroups / armature modifier) and deletes strays. Right filter for a graft tool regardless.
• graft refusal check: provides = limb bones - {limb root}; refuse if provides ∩ body bones. Attach/root bone sharing the target name is expected.
• MB test uses a stdlib http.server mock + a 2nd scenegod instance; asserts Bearer token forwarded, multipart upload, asset_id chained into job payload. BLOCKED/REQUESTS: none. BACKLOG (from orchestrator, not urgent): draft webm via MediaRecorder is untested in the embedded preview (rAF suspension). Needs one verification in a real Chrome window before calling draftRecord done — client-only, needs Lane A stage running live; deferred. NEXT: Lane C M1-M4 all shipped. Available for polish / integration support. Blender binary here is /Applications/Blender.app/Contents/MacOS/Blender (not on PATH as blender in this session, contrary to orchestrator note).

2026-07-18 session 3b

DONE: optional item from orchestrator — /rhubarb?path= endpoint. Commit fb59601.

• GET /rhubarb?path= (path-guarded) -> rhubarb -f json <wav> -> returns {metadata, mouthCues:[{start,end,value}]} for Lane A's viseme lane. 503 with install hint when the binary is absent (ffmpeg-style gate).
• test_server.py: +503-when-absent assert (9 groups green). DECISIONS: synchronous subprocess (VO clips are short); rhubarb NOT installed on ultra, so only the 503 path is exercised here — happy path (JSON parse) is untested until rhubarb is on PATH. Flagged same as MediaRecorder backlog. BLOCKED/REQUESTS: none. To fully verify: install rhubarb-lip-sync on ultra, then GET /rhubarb?path=audio/.wav. NEXT: nothing outstanding — Lane C M1-M4 + rhubarb shipped. Standing by.

2026-07-20 session 4

DONE: M5 /director + M6 render.js sliver.

• scenegod/server.py: POST /director {text, scene:{entities,time}} -> OpenAI-compat chat (SCENEGOD_LLM_URL + /v1/chat/completions, model SCENEGOD_LLM_MODEL default qwen2.5:7b, temp 0.1, response_format json_object, stdlib urllib, 120s timeout). 503 + env hint when URL unset; 502 on LLM error/unreachable/unparseable output — raw model text is NEVER forwarded. _validate_ops: ops shot/light/mark checked against vocab + scene entity ids; violations dropped into rejected [{op, reason}]; response {ops, rejected}. Shot defaults angle="eye", focal=35 filled server-side.
• Vocab (SHOTS/ANGLES/FOCALS/LIGHTS/MARKS) defined ONCE at top of the director section, mirroring PLAN §5 M5.
• web/render.js finalRender: after timeline.step(f), before capture: if (stage.syncVideos) await stage.syncVideos(timeline.time) — guarded no-op until Lane A lands it (M6 determinism hook).
• scripts/test_server.py: +director group (in-process http.server LLM mock, MB-mock pattern): 503 when env unset, 3 valid ops pass through verbatim, unknown op / unknown entity id / unknown preset land in rejected with reasons, prompt carries 10 vocab words + roster ids + playhead, model name
  • low temp asserted. OK: 9 test groups passed (rhubarb-503 group now self-skips — rhubarb is installed on ultra, so that group's absent-path doesn't run; happy path was orchestrator-verified live). DECISIONS:
• web/grammar.js does NOT exist yet (no presets.js either) — vocab lives in server.py per spec fallback. AT SYNC: re-point the SHOTS/ANGLES/FOCALS/ LIGHTS/MARKS lists + DIRECTOR_SYS at Lane A's grammar.js (read at boot) so server prompt and client presets can't drift. Op shapes I defined (scenegod:direct): {op:"shot",subject,shot,angle,focal} / {op:"light",preset} / {op:"mark",subject,mark,target?} — Lane A's presets.js appliers must accept exactly these.
• Model may return {"ops":[...]} or a bare array — both accepted (json_object mode forces an object wrapper; bare array tolerated for servers that ignore response_format).
• Env read at request time (matches _mb_token pattern) so John can set SCENEGOD_LLM_URL without a restart-order footgun; test env explicitly pops it for the 503 assert.
• focal coerced via int() before vocab check (7b models love "35" strings). BLOCKED/REQUESTS:
• Lane A: need web/grammar.js (data only) + presets.js appliers matching the op shapes above; flag any shape disagreement at SYNC and I'll conform.
• Live end-to-end against real qwen2.5:7b on m4pro untested this session (SCENEGOD_LLM_URL unset locally by design) — orchestrator: one smoke call at SYNC with env set is the acceptance step. NEXT: M6 FLOW VIDEO PLATES server side (unlocked on this acceptance): flow_intake.py poster-jpg intake is already in scripts/; verify video exts in /assets/tree (mp4 not in ASSET_EXTS yet — backdrops video category will need it) + deterministic render check once Lane A's stage.syncVideos lands.