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| 1 | +# BUILD_PR_LEVEL_18_9_TRACK_C_FINALIZATION |
| 2 | + |
| 3 | +## Purpose |
| 4 | +Complete Level 18 Track C contract stabilization finalization. |
| 5 | + |
| 6 | +## Finalization Outcome |
| 7 | +Track C is now fully finalized with execution-backed validation: |
| 8 | +- engine public APIs finalized |
| 9 | +- shared contracts finalized |
| 10 | +- unstable/experimental surfaces removed or isolated |
| 11 | +- consumers validated against finalized contract surfaces |
| 12 | + |
| 13 | +## Contract Surface Verification |
| 14 | +1. Shared contract/selectors internal-path leakage scan: |
| 15 | +```bash |
| 16 | +rg -n "shared/state/(getState|selectors|publicSelectors|contracts|normalization|guards|createPromotionStateSnapshot|getStateVariantClassification)\\.js|shared/contracts/(sharedStateContracts|replayContracts)\\.js" src tests -g "*.js" -g "*.mjs" |
| 17 | +``` |
| 18 | +Result: no matches (clean) |
| 19 | + |
| 20 | +2. Engine 3D debug deep providers/panels leakage scan: |
| 21 | +```bash |
| 22 | +rg -n "debug/standard/threeD/(providers|panels)/" src tests -g "*.js" -g "*.mjs" |
| 23 | +``` |
| 24 | +Result: no matches (clean) |
| 25 | + |
| 26 | +3. Stable consumer surface scan for 3D debug barrel usage: |
| 27 | +```bash |
| 28 | +rg -n "debug/standard/threeD/index\\.js" src tests -g "*.js" -g "*.mjs" |
| 29 | +``` |
| 30 | +Result: active consumers use stable barrel imports. |
| 31 | + |
| 32 | +4. 3D barrel contract assertion: |
| 33 | +- Verified stable top-level exports exist. |
| 34 | +- Verified legacy summary symbols are isolated under `legacySummary3d` and not exposed top-level. |
| 35 | +- Result: PASS (`Track C 3D barrel contract`). |
| 36 | + |
| 37 | +## Consumer Validation |
| 38 | +Executed focused consumer tests: |
| 39 | +- `tests/shared/SharedFoundationCombinedPass.test.mjs` |
| 40 | +- `tests/shared/GetStateVariantClassification.test.mjs` |
| 41 | +- `tests/world/WorldGameStateSystem.test.mjs` |
| 42 | +- `tests/world/WorldGameStateAuthoritativeHandoff.test.mjs` |
| 43 | +- `tests/world/WorldGameStateAuthoritativeScore.test.mjs` |
| 44 | +- `tests/tools/CameraDebugPanel.test.mjs` |
| 45 | +- `tests/tools/TransformInspectorDebugPanel.test.mjs` |
| 46 | +- `tests/tools/RenderPipelineStagesDebugPanel.test.mjs` |
| 47 | +- `tests/tools/CollisionOverlaysDebugPanel.test.mjs` |
| 48 | +- `tests/tools/SceneGraphInspectorDebugPanel.test.mjs` |
| 49 | +- `tests/final/DebugObservabilityMaturity.test.mjs` |
| 50 | +- `tests/production/EnginePublicBarrelImports.test.mjs` |
| 51 | + |
| 52 | +Result: 12/12 PASS |
| 53 | + |
| 54 | +## Files Changed In This PR |
| 55 | +- `docs/dev/roadmaps/MASTER_ROADMAP_HIGH_LEVEL.md` (Track C marker transitions only) |
| 56 | +- `docs/dev/reports/BUILD_PR_LEVEL_18_9_TRACK_C_FINALIZATION_report.md` |
| 57 | + |
| 58 | +## Roadmap Update (Rules Applied) |
| 59 | +Updated only Track C `[.] -> [x]` markers, no text rewrite/deletion: |
| 60 | +- `finalize engine public APIs` |
| 61 | +- `finalize shared contracts` |
| 62 | +- `remove unstable or experimental surfaces` |
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