coordination: hand off static M2 batch materializer

coordination/claims/M03-RND-M2-STATIC-BATCH-MATERIALIZER-001.md

@@ -73,15 +73,24 @@ and batch attachment from `StreamingWorldLoader`.
 
 ## Status
 
-- State: active
-- Done: contract and ownership boundary
-- Next: implementation, verification and documentation
+- State: ready for integration
+- Done: materializer, loader adapter, verifier and required documentation
+- Next: integrator merge and post-merge acceptance
 - Blocked by:
 
 ## Handoff
 
-- Commit:
-- Results:
-- Remaining risks:
-- Documentation updated:
+- Commit: `252927d`
+- Results: materializer passes 11 invalid/node/Mesh/render/attachment/source
+  cases and 10,000 transform API writes in 0.552 ms; all 51 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: headless dummy timing excludes GPU upload cost; private asset
+  traversal/visual comparison, spatial-cell culling, descriptor pressure, leaks
+  and p95/p99 remain unavailable; no original-client comparison is claimed.
+- Documentation updated: inline API; `m2-static-batch-materializer.md` with
+  data-flow, lifecycle, sequence and dependency diagrams; build/cache/world-
+  renderer specs, module registry and `RENDER.md`.
 
+<!-- OPENWC_HANDOFF:READY:M03-RND-M2-STATIC-BATCH-MATERIALIZER-001:252927d -->