# M03 — Renderer Facade and Safe Extraction

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## Outcome

Закрыть монолитный streamer стабильным API и постепенно извлечь тестируемые подсистемы без rewrite.

## Steps

- [ ] Ввести `WorldRenderFacade` для focus, environment, entity visuals, ground query и metrics.
- [x] Запретить gameplay/editor доступ к внутренним очередям streamer.
- [x] Извлечь pure `StreamingTargetPlanner`.
- [x] Извлечь `RenderBudgetScheduler` с bounded queues/cancellation.
- [ ] Затем извлекать terrain, M2, WMO и liquid services по одному.
- [ ] Сохранить cache versioning и main-thread GPU finalization rules.
- [ ] Добавить dependency и performance regression checks.

## Fidelity evidence

Все baseline checkpoints сравниваются до/после; placement, visibility, animation и materials не меняются без отдельной fidelity-задачи.

## Exit criteria

Runtime и Editor используют facade; planner/scheduler тестируются без полного мира; p95/p99 и hitch budgets не хуже согласованного baseline.

## Evidence

- Date: 2026-07-16
- Revision/worktree: master merges `7ece2ab`, `7e35de7`, `80cb084`, `d6e5b53`, `c69abd6`;
  packages `M03-RND-SCHEDULER-001`, `M03-RND-INTERNAL-ACCESS-GATE-001`,
  `M03-RND-FACADE-GROUND-QUERY-001`, `M03-RND-FACADE-ENVIRONMENT-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
  `cases=5 average_ms=1.804`; facade/focus passed; coordinate boundary
  `files=111 consumers=6`; renderer manifest retained `7/7` checkpoints;
  shutdown ownership and repository gates passed. Internal-access gate additionally
  derived `43` private symbols and found no forbidden access across `7` gameplay
  and `9` EditorPlugin-package sources plus the terrain probe. Ground facade passed
  `delegation=5 ground_contract=2`; cold `RenderedGroundSample contract=3`;
  environment integration passed cold snapshot `contract=5` and facade
  `delegation=6 environment_contract=7`; dry-run retained all `7/7` plans and
  applied the dusk checkpoint at `time=19.00`. M02 terrain-query regression
  remained green (13 pre-existing expired M00 claim warnings).
- Fidelity comparison: all 16 historical operation limits and drain sites were
  preserved; chunk removal/create retain their shared removal-first budget.
  Defaults, quality presets, cache versions and visual rules are unchanged.
  Rendered-ground diagnostics preserve the prior 5000-unit ray, 3x3 search and
  `2/5/10/20/40`-unit nearby fallback while hiding mutable renderer state.
  Environment snapshots preserve the prior fixed-clock assignments while DBC
  profile/area/skybox selection, interpolation, fog, sun and shader rules remain unchanged.
  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;
  renderer-owned ground sample, facade/loader ground query, migrated terrain probe,
  immutable environment snapshot, facade/sky adapter, migrated checkpoint time input,
  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
  in-flight work; the environment snapshot currently covers world time but not weather
  or indoor state; M03 still needs entity facade commands, service extraction
  and dependency/performance acceptance.