# M03-RND-M2-STATIC-BUILD-RESOURCE-OBSERVER-001

<!-- OPENWC_CLAIM:M03-RND-M2-STATIC-BUILD-RESOURCE-OBSERVER-001:sindo-main-codex:2026-07-20 -->

## Owner

- Agent ID: `sindo-main-codex`
- Target: M03 Renderer Facade and Safe Extraction
- Branch: `work/sindo-main-codex/m03-m2-static-build-resource-observer`
- Worktree: `C:\Users\sindo\open-wc-worktrees\m03-m2-static-build-resource-observer`

## Outcome

Move static M2 build cache lookup, threaded request selection and terminal
missing transition from the loader into a service that fills
`M2BuildResourceSnapshot`.

## Non-goals

- Move animation/native prototype observation or finalize drains.
- Own/free Meshes, Nodes or cache entries.
- Change path candidate order, GLB filtering, retry behavior, permits or visuals.
- Change cache formats, profiles or batching.

## Paths

- Exclusive: `src/render/m2/m2_static_build_resource_observer.gd`,
  `src/tools/verify_m2_static_build_resource_observer.gd`,
  `docs/modules/m2-static-build-resource-observer.md`, this claim
- Shared: loader, M2 snapshot/dispatch/pipeline/cache specs and verifiers,
  world renderer, module registry, RENDER and M03 Evidence

## Contracts and data

- Cached Mesh wins; terminal missing returns missing; existing pending request waits.
- Candidate order remains normalized/lowercase nested then basename per extension.
- `.tscn` precedes `.glb`; pivot-prefix GLB is skipped for static build.
- Successful/`ERR_BUSY` request is remembered; no usable candidate marks missing.
- Snapshot adopts exact Mesh/missing result; service never frees engine objects.

## Dependencies

- Requires: accepted resource snapshot `032a256`
- Blocks: remaining animated resource observer extraction

## Verification

- Synthetic cache/pipeline/snapshot lifecycle, path order, source boundaries and timing;
  adjacent M2 and renderer gates; full headless suite and checkpoint dry-run.

## Documentation deliverables

- Inline API docs; module API/I/O/ownership; data-flow/state/sequence/dependency
  diagrams; adjacent renderer docs and M03 Evidence.

## Status

- State: ready for integration
- Done: implementation, verification and documentation
- Next: integrator merge and post-merge acceptance
- Blocked by:

## Handoff

- Commit: `7cb3e34` (`render: extract static M2 build resource observer`)
- Results: observer PASS (`11` cases, `20,000` iterations, `64.654ms`);
  full autonomous suite PASS (`55/55`); renderer checkpoint dry-run PASS (`7/7`);
  internal-access PASS (`30` private symbols); documentation PASS (`42` module
  specs); coordination PASS with `30` historical warnings.
- Remaining risks: successful asynchronous admission is covered by source and
  existing pipeline regressions because an undrained unit request leaks; private
  asset traversal, p95/p99, leak and visual evidence remain unavailable;
  animated observation and static finalize polling remain loader-owned.
- Documentation updated: new observer module API/I/O/data-flow/state/sequence/
  dependency/ownership specification; M2 snapshot, pipeline/cache, world-renderer,
  module registry, `RENDER.md` and M03 Evidence updated.