P2: tool adapter layer, mock host, frame pipeline, and local web UI
- MockHostAdapter (tests/mock_host): in-memory editing model with opaque
entity ids, id invalidation, token-bucket rate limiting, snapshot/restore
with cap, event subscription, and a stdlib-zlib PNG encoder producing
time-varying non-black frames
- HostToolExecutor: all 26 tool handlers mapped to HostAdapter calls,
snapshot orchestration for mutating batches, concurrent scan_timeline
frame pipeline with token bucket and RateLimited backoff, undo_session()
restoring per-batch snapshots in reverse, get_params min/max/choices
reflection
- Web UI (core[webui] extra): FastAPI + single-page vanilla JS, chat log,
pending-confirmation list with approve/reject endpoints (timeout defaults
to reject), progress, undo-session, snapshot management; SSE push + POST,
bound to 127.0.0.1
- Host error types (HostError/EntityNotFound/RateLimited) and shared
TokenBucket
- P2 acceptance chain: import -> place -> split -> ripple delete ->
effect + param -> frame verification (non-black, pixel changes at cut
and after effect) -> undo_session restores original state
Tests: 129 passed via uv run pytest (no network)
Mike-Solar
1b66a70859