docs(M03): hand off M2 runtime mesh finalizer

Work-Package: M03-RND-M2-RUNTIME-MESH-FINALIZER-001
Agent: sindo-main-codex
Tests: 37 headless regressions, checkpoint dry-run, documentation and coordination gates pass
Fidelity: refresh/rebuild/fallback extraction only; asset-backed visual parity remains unclaimed

coordination/claims/M03-RND-M2-RUNTIME-MESH-FINALIZER-001.md

@@ -78,14 +78,23 @@ Mesh finalizer while retaining raw-file I/O in the loader.
 
 ## Status
 
-- State: claimed
+- State: ready
-- Done: refresh, raw-data boundary, rebuild/fallback and both clear sites identified
+- Done: finalizer, loader/test adapters, transition/rebuild verifier and required documentation
-- Next: implement finalizer, migrate adapters, verify and document
+- Next: integrator merge and post-merge smoke
 - Blocked by:
 
 ## Handoff
 
-- Commit:
+- Commit: `ece7724`
-- Results:
+- Results: finalizer passes current/stale/ordinary/synthetic-rebuild/fallback/
-- Remaining risks:
+  clear contracts and 100-by-256 finalizations in 53.719 ms; 37 headless
-- Documentation updated:
+  renderer/coordinate regressions pass; checkpoint dry-run passes 7/7;
+  documentation and coordination gates pass.
+- Remaining risks: rebuild remains synchronous behind the existing permit; no
+  private M2 material/traversal/descriptor-pressure/leak/p95/p99 or original-
+  client comparison; raw `.m2` I/O remains loader-owned by design.
+- Documentation updated: inline API; `m2-runtime-mesh-finalizer.md` with
+  data-flow, lifecycle, sequence and dependency diagrams; classifier/extractor/
+  cache/pipeline specs, module registry, `world-renderer.md` and `RENDER.md`.
+
+<!-- OPENWC_HANDOFF:READY:M03-RND-M2-RUNTIME-MESH-FINALIZER-001:ece7724 -->