coordination: hand off WMO scene instance factory

Work-Package: M03-RND-WMO-SCENE-INSTANCE-FACTORY-001
Agent: sindo-main-codex
Tests: documented in handoff
Fidelity: valid cached/live behavior retained; invalid-root leak fixed

coordination/claims/M03-RND-WMO-SCENE-INSTANCE-FACTORY-001.md

@@ -56,7 +56,27 @@ duplication with shared name/placement application into one main-thread factory.
 
 ## Status
 
-- State: active
-- Done: scope and contracts identified
-- Next: implement and verify factory delegation
+- State: ready
+- Done: implementation, verification and documentation
+- Next: integrator review and merge
 - Blocked by:
+
+## Handoff
+
+- Commit: `7e97b19` (`render: extract WMO scene instance factory`)
+- Results: factory PASS `cases=41 iterations=1000 elapsed_ms=5.297`;
+  placement resolver dependency PASS `cases=10 iterations=20000
+  elapsed_ms=28.740`; suite `65/66` with no unexpected failures and only the
+  proprietary ADT placement probe unavailable; editor parse had zero script
+  diagnostics; checkpoint dry-run retained `7/7`; documentation passed with
+  `52` module specifications; coordination passed with `77` historical warnings.
+- Fidelity: valid cached/live cache-validation distinction, basename, exact
+  Transform3D and descendant Resource identity are unchanged. Invalid non-Node3D
+  cached roots are now freed synchronously, fixing an error-path leak without
+  changing valid visible output.
+- Remaining risks: instantiation/duplication remains synchronous; no private WMO
+  portal/room, visual, long-traversal, leak/GPU or p95/p99 evidence.
+- Documentation: new full factory module specification; placement resolver
+  consumers/sequence, renderer registry/source map and `RENDER.md` updated.
+
+<!-- OPENWC_HANDOFF:READY:M03-RND-WMO-SCENE-INSTANCE-FACTORY-001:7e97b19 -->