- F-01: cost bar crit (red) state past 90% of budget
- F-02: normalize() hardens fetched board state against sparse payloads
- F-03: /thumb 404s for videos with no extractable poster frame instead
of serving raw video bytes
- F-04: checkpoint artifact path refs only resolve inside the project dir
- F-05 (board half): stall detection — in_progress stage with no disk
activity >10min renders red 'stalled?' + header badge flips to STALLED?;
verified against the real wedged why-cities-glow project
- eval harness from dogfood session committed (visual regression +
interaction smoke, capture watcher, server/gate test suites) +
regression tests for each finding; 46 backlot tests green, visual eval
green (restage-before-capture note logged)
- ChangeHub subscriptions filtered per project: unrelated-project bursts
can no longer flood a board's queue and starve its own change signal
- thumbnail temp files unique per request (concurrent-miss race on the
shared .tmp path corrupted the cache)
- watcher change-mapping is pure string work (no per-path resolve() in
thousand-file change batches); 'C:'-style project ids rejected
- replay: tz-naive timestamps treated as UTC; final render/script no
longer leak at t0 on storyboard-less projects; single tick chain on
rapid pause/play; drag-safe scrubber (label tracks input, board renders
on release); render-video playback survives SSE re-renders
- state: scene id 0 joins correctly, nested depth>0 events don't corrupt
generating state, out-of-project asset paths honestly unserveable,
negative durations clamped, tolerant manifest stage parse
- UI: decisions alt filter precedence fixed, activity counts parallel
same-tool runs, el() html sink removed, NaN-safe formatters
- backlot/state.py: BoardState from disk — stage rail with gate audit
(gate_skipped detection from history/), scene_plan x script x
asset_manifest storyboard join, takes, generating-state from events,
media discovery incl. atelier root-render heuristic, degradation ladder,
library summaries
- backlot/server.py: FastAPI on 4750 — /api/projects, /api/project/{id}/state,
SSE change feeds (project + library) fed by a watchfiles watcher,
/media with range support and traversal protection, UI mounts
- backlot/__main__.py: 'python -m backlot open [project]' idempotent
launcher (spawns detached server, opens browser); 'serve' foreground
- verified against real projects: 73 listed, full state for
signal-from-tomorrow, 206 range responses, SSE change push on
filesystem write
