coord(M03): hand off M2 animation playback

coordination/claims/M03-RND-M2-ANIMATION-PLAYBACK-001.md

@@ -77,14 +77,25 @@ mutation and native animator data/start behavior from `StreamingWorldLoader`.
 
 ## Status
 
-- State: claimed
-- Done: playback/native ownership boundary audited on current master
-- Next: implement controller, migrate adapters, verify and document
+- State: ready for integration
+- Done: playback controller, loader adapters, verifier and required documentation
+- Next: integrate on master and run post-merge acceptance gates
 - Blocked by:
 
 ## Handoff
 
-- Commit:
-- Results:
-- Remaining risks:
-- Documentation updated:
+- Commit: `9b73571`
+- Results: playback controller passes 15 phase/selection/loop/play/seek/native-
+  copy/start/diagnostic/source cases and 20,000 phase-selection pairs in
+  23.415 ms; all 49 autonomous headless verifiers pass, while the proprietary
+  ADT placement probe is unavailable without `data/extracted`; checkpoint
+  dry-run passes 7/7; documentation and coordination gates pass; loader-private
+  inventory remains 30.
+- Remaining risks: private animation-name/timing/native visual comparison,
+  descriptor pressure, leaks and p95/p99 remain unavailable; default selection
+  is still heuristic and no paired original-client comparison is claimed.
+- Documentation updated: inline API; `m2-animation-playback-controller.md` with
+  data-flow, lifecycle, sequence and dependency diagrams; finalizer/build/world-
+  renderer specs, module registry and `RENDER.md`.
+
+<!-- OPENWC_HANDOFF:READY:M03-RND-M2-ANIMATION-PLAYBACK-001:9b73571 -->