coordination: claim WMO runtime scene preparer

Work-Package: M03-RND-WMO-RUNTIME-SCENE-PREPARER-001
Agent: sindo-main-codex
Tests: not run (coordination only)
Fidelity: behavior-preserving extraction planned

coordination/claims/M03-RND-WMO-RUNTIME-SCENE-PREPARER-001.md

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+# M03-RND-WMO-RUNTIME-SCENE-PREPARER-001
+
+<!-- OPENWC_CLAIM:M03-RND-WMO-RUNTIME-SCENE-PREPARER-001:sindo-main-codex:2026-08-03 -->
+
+## Owner
+
+- Agent ID: `sindo-main-codex`
+- Target: M03 Renderer Facade and Safe Extraction
+- Branch: `work/sindo-main-codex/m03-wmo-runtime-scene-preparer`
+- Worktree: `C:\Users\sindo\open-wc-worktrees\m03-wmo-runtime-scene-preparer`
+
+## Outcome
+
+Move cached/live WMO subtree preparation—recursive Mesh finalization, direct
+Occluders-child policy and recursive shadow enabling—from the loader into one
+stateless main-thread service.
+
+## Non-goals
+
+- Change scene/prototype loading, validation, placement or attachment.
+- Change WMO material refresh rules, cache versions or builder behavior.
+- Change occlusion/shadow defaults or add visibility/portal behavior.
+- Change queue, scheduler, ownership or shutdown lifecycle.
+
+## Paths
+
+- Exclusive: `src/render/wmo/wmo_runtime_scene_preparer.gd`,
+  `src/tools/verify_wmo_runtime_scene_preparer.gd`,
+  `docs/modules/wmo-runtime-scene-preparer.md`, this claim
+- Shared: loader, renderer module registry/specification, `RENDER.md`, M03 Evidence
+
+## Contracts and data
+
+- Cached preparation finalizes every MeshInstance3D Mesh and non-null
+  MultiMeshInstance3D Mesh in depth-first traversal order.
+- Live preparation does not cross the runtime Mesh finalizer boundary.
+- Disabled occlusion removes only the direct child named `Occluders` and queues
+  it for deletion; enabled occlusion retains it.
+- Enabled shadows recursively set every GeometryInstance3D to ON; disabled
+  shadows preserve existing per-node values.
+- The service borrows the subtree and retains no Node or Resource.
+
+## Dependencies
+
+- Requires: accepted WMO runtime Mesh finalizer
+- Blocks: remaining loader-owned WMO scene/prototype orchestration cleanup
+
+## Verification
+
+- Synthetic cached/live traversal, exact resource/order, occluder, shadow,
+  invalid-input, ownership, source and bounded-timing contracts; adjacent WMO,
+  renderer, documentation and coordination gates; checkpoint dry-run.
+
+## Documentation deliverables
+
+- Inline API docs; module API/I/O/ownership; data-flow/sequence/dependency
+  diagrams; adjacent renderer docs and M03 Evidence.
+
+## Status
+
+- State: active
+- Done: scope and historical path distinction identified
+- Next: implement and verify subtree preparation delegation
+- Blocked by: