docs(M03): accept M2 placement grouper

coordination/claims/M03-RND-M2-PLACEMENT-GROUPER-001.md

@@ -81,12 +81,13 @@ grouping from the worker callback into a scene-free service.
 
 ## Status
 
-- State: handoff
+- State: accepted
 - Done: pure grouper, worker adapter, regressions and documentation verified
-- Next: M03 integrator acceptance and merge to master
+- Next: M2 worker/build state extraction and spatial-cell evidence
 - Blocked by:
 
 <!-- OPENWC_HANDOFF:READY:M03-RND-M2-PLACEMENT-GROUPER-001:9df32d3 -->
+<!-- OPENWC_INTEGRATION:ACCEPTED:M03-RND-M2-PLACEMENT-GROUPER-001:f88bf97 -->
 
 ## Handoff
 
@@ -107,3 +108,7 @@ grouping from the worker callback into a scene-free service.
 - Documentation updated: inline public API; new
   `docs/modules/m2-placement-grouper.md`; transform resolver module spec,
   renderer module registry, `docs/modules/world-renderer.md` and `RENDER.md`.
+- Integration: accepted in master merge `f88bf97`; post-merge grouper
+  (`cases=9`, `iterations=100`, `placements=256`, `elapsed_ms=67.104`),
+  transform resolver, registry, internal-access, facade, manifest,
+  documentation and coordination gates passed.

targets/03-renderer-facade.md

@@ -27,13 +27,14 @@ Runtime и Editor используют facade; planner/scheduler тестиру
 ## Evidence
 
 - Date: 2026-07-16
-- Revision/worktree: master merges `7ece2ab`, `7e35de7`, `80cb084`, `d6e5b53`, `c69abd6`, `606770c`, `630a0c1`, `f36fabb`, `24aef13`, `2342430`, `396be5e`;
+- Revision/worktree: master merges `7ece2ab`, `7e35de7`, `80cb084`, `d6e5b53`, `c69abd6`, `606770c`, `630a0c1`, `f36fabb`, `24aef13`, `2342430`, `396be5e`, `f88bf97`;
   packages `M03-RND-SCHEDULER-001`, `M03-RND-INTERNAL-ACCESS-GATE-001`,
   `M03-RND-FACADE-GROUND-QUERY-001`, `M03-RND-FACADE-ENVIRONMENT-001`,
   `M03-RND-FACADE-ENTITY-001`, `M03-RND-TERRAIN-CACHE-SERVICE-001`,
   `M03-RND-TERRAIN-LOD-PLANNER-001`, `M03-RND-TERRAIN-CHUNK-QUEUE-001`,
   `M03-RND-M2-UNIQUE-REGISTRY-001`,
-  `M03-RND-M2-PLACEMENT-TRANSFORM-001`
+  `M03-RND-M2-PLACEMENT-TRANSFORM-001`,
+  `M03-RND-M2-PLACEMENT-GROUPER-001`
 - Commands: dedicated scheduler/planner/facade/focus/coordinate/manifest/shutdown
   headless verifiers; Godot cold editor parse; coordination, documentation and diff gates.
 - Results: scheduler `cases=6 iterations=20000 elapsed_ms=10.216`; planner
@@ -61,6 +62,9 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   M2 placement transform resolver passed `cases=9 iterations=10000
   elapsed_ms=27.409`; post-merge M2 registry, internal-access `42`, facade,
   `7/7` manifest, documentation and coordination gates remained green.
+  M2 placement grouper passed `cases=9 iterations=100 placements=256
+  elapsed_ms=67.104`; post-merge transform resolver, registry, internal-access
+  `42`, facade, `7/7` manifest, documentation and coordination gates remained green.
   M02 terrain-query regression
   remained green (13 pre-existing expired M00 claim warnings).
 - Fidelity comparison: all 16 historical operation limits and drain sites were
@@ -84,6 +88,9 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   M2 regular Euler, Elwynn cliff-rock shell correction, waterfall yaw/local-axis
   twist, tall-waterfall anchor compensation, path normalization and caller scale
   clamps are unchanged across worker grouping, placeholders and direct instances.
+  M2 worker grouping retains invalid-record filtering, case-sensitive lowercase
+  `.mdx/.mdl` conversion, first-seen group/per-group placement order, tile-local
+  origin subtraction and the `0.0001` scale clamp.
   No new build-12340 parity claim is made; asset-backed visual/p95/p99 comparison remains pending.
 - Changed files: scene-free scheduler and verifier; streamer budget composition/
   permit delegation; scheduler module spec; world renderer/module registry/RENDER notes;
@@ -95,7 +102,7 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   pure terrain chunk geometry queue planner and loader queue-adoption adapter,
   stateful M2 unique placement registry, loader reserve/release/clear adapters and
   migrated historical dedupe smoke, stateless M2 placement transform resolver and
-  three loader transform adapters,
+  three transform consumers, stateless M2 placement grouper and worker adapter,
   expanded facade/internal-access/coordinate verifiers; work-package claims and this evidence.
 - Remaining risks: queue storage length and worker concurrency/stale-result logic
   remain streamer-owned; cancellation stops new permits but does not interrupt
@@ -108,6 +115,7 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   still needs acceptance, while queue drains and geometry finalization remain monolithic;
   private Azeroth data was absent for the asset-backed ADT placement probe; M2
   asset-backed visual transform recheck, grouping/build/tasks/caches/finalization
-  and boundary traversal p95/p99 remain pending;
+  and boundary traversal p95/p99 remain pending; path grouping is not yet
+  culling-driven spatial-cell grouping;
   M03 still needs further terrain/M2/WMO/liquid service extraction
   and dependency/performance acceptance.