# M03-RND-WMO-SCENE-RESOURCE-CACHE-001 — WMO cached-scene resource state

<!-- OPENWC_CLAIM:M03-RND-WMO-SCENE-RESOURCE-CACHE-001:sindo-main-codex:2026-07-20 -->

## Ownership

- Target: M03
- Program: RND
- Owner/Agent ID: sindo-main-codex
- Branch: `work/sindo-main-codex/m03-wmo-scene-resource-cache`
- Lease expires UTC: 2026-07-20
- Integrator: M03 milestone integrator

## Outcome

Extract cached-WMO `PackedScene`, negative-cache and asynchronous request state
from the loader while preserving loader-owned file limits, I/O and scene-cache
version validation.

## Non-goals

- Call `ResourceLoader`/`FileAccess`, construct `.tscn` paths or measure files.
- Instantiate scenes or validate WMO builder cache metadata/version.
- Own live WMO prototypes, placement/build jobs, instantiated Nodes or RIDs.
- Change missing/oversize/request-error fallback behavior or debug output.
- Claim asset-backed WMO fidelity, leak acceptance or traversal p95/p99.

## Paths

- Exclusive: `src/render/wmo/wmo_scene_resource_cache_state.gd`,
  `src/tools/verify_wmo_scene_resource_cache_state.gd`,
  `docs/modules/wmo-scene-resource-cache-state.md`, this claim
- Shared/hotspots: `src/scenes/streaming/streaming_world_loader.gd`,
  `src/tools/verify_render_runtime_cache_shutdown.gd`,
  `docs/modules/wmo-render-resource-cache-state.md`,
  `docs/modules/world-renderer.md`, `docs/modules/README.md`, `RENDER.md`,
  `targets/03-renderer-facade.md`
- Generated/ignored: `.godot`, native DLL, generated ADT/WMO resources, caches
  and proprietary renderer corpus

## Contracts and data

- State keys are loader-normalized relative WMO paths copied as `String`.
- Cached values are loader-validated `PackedScene` references.
- Pending values are `.tscn` paths for loader-owned threaded requests.
- Missing state accepts absent file, oversize, request-start, load and validation failures.
- Terminal pending removal precedes validated-scene or missing adoption.
- Transient clear retains accepted scenes; full clear releases all state.
- Cache metadata/version, file-size limit, profile and fallback rules are unchanged.

## Dependencies

- Requires: current master `e690756`; accepted WMO render Resource cache state
- Blocks: further WMO I/O/fallback and materialization decomposition
- External state: none; verification uses synthetic PackedScenes and paths

## Verification

- Commands: dedicated lifecycle/request/missing/reset/diagnostics/source/timing
  verifier; WMO render-cache/queue/planner/registry/resolver/material/shutdown plus
  adjacent renderer/streaming/coordinate/documentation/coordination gates
- Fixtures: synthetic PackedScene instances and normalized relative/cache paths
- Fidelity evidence: exact current cached-scene/missing/request transitions preserved
- Performance budget: 100 cycles over 256 scene/request keys under 1 second

## Documentation deliverables

- Inline public API docs
- Module specification with inputs/outputs, ownership and source map
- Data-flow, lifecycle/state and loader interaction sequence diagrams
- World-renderer, module registry, render-cache and RENDER status updates

## Simplicity and naming

- Important names introduced: `WmoSceneResourceCacheState`
- Simplest considered solution: one RefCounted around three Dictionaries
- Rejected complexity/abstractions: generic cache hierarchy, callbacks, signals,
  mutexes, ResourceLoader wrapper, persistence layer or render/scene cache merger
- Unavoidable complexity and justification: missing can be recorded without a
  pending request, and partial reset must retain validated PackedScenes
- Measured optimization evidence: bounded synthetic store/request/reset loop

## Status

- State: accepted
- Done: state holder implemented; loader lookup/request/drain/reset/metrics
  adapters migrated; shutdown regression and required documentation updated
- Next: WMO I/O/live fallback or liquid service extraction
- Blocked by:

<!-- OPENWC_INTEGRATION:ACCEPTED:M03-RND-WMO-SCENE-RESOURCE-CACHE-001:ada0fd9 -->

## Handoff

- Commit: `c839294`
- Results: scene cache-state PASS (`cases=11`, `iterations=100`,
  `elapsed_ms=40.768`; initial direct cold run `43.636ms`); render cache-state,
  WMO queue/planner/registry/resolver/material/shutdown plus 18 adjacent
  M2/terrain/facade/scheduler/streaming/coordinate regressions PASS;
  documentation and coordination gates PASS; checkpoint dry-run PASS `7/7`.
- Remaining risks: accepted PackedScenes remain strongly referenced until full
  shutdown release; ResourceLoader/FileAccess I/O, cache-validation probes and
  live fallback remain in loader; no proprietary stale/oversize fixture,
  asset-backed traversal/leak run, p95/p99 or original-client paired evidence.
  The extracted scene state passed cold; full loader cold execution still needs
  editor class registration for pre-existing focus/coordinate global classes.
- Documentation updated: inline public API; new
  `docs/modules/wmo-scene-resource-cache-state.md`; render-cache spec, module
  registry, world renderer and `RENDER.md`; data-flow/state/sequence diagrams,
  ownership, threading, file-size/cache-version boundary, failure/recovery and
  source map included.
- Integration: merged as `ada0fd9`; post-merge scene state (`cases=11`,
  `iterations=100`, `elapsed_ms=40.113`), render state (`43.434ms`), shutdown,
  WMO queue/resolver, facade, internal-access (`private_symbols=40`), `7/7`
  manifest, documentation and coordination gates passed.

<!-- OPENWC_HANDOFF:READY:M03-RND-WMO-SCENE-RESOURCE-CACHE-001:c839294 -->
