Level 19.1 System Integration Validation

- Validated cross-system interaction
- Checked for hidden coupling
- Confirmed stable integration

Author: DavidQ

docs/dev/CODEX_COMMANDS.md

@@ -2,10 +2,10 @@ MODEL: GPT-5.3-codex
 REASONING: high
 
 COMMAND:
-- Review overlay slice PRs
-- Group into capability-level bundles
-- Update docs to reflect consolidation
-- No code changes
+- Execute cross-system validation
+- Validate integration points
+- Identify hidden coupling
+- Run full test suite
 
 Output:
-<project folder>/tmp/BUILD_PR_LEVEL_18_8_PR_CONSOLIDATION_OVERLAY_SLICE.zip
+<project folder>/tmp/BUILD_PR_LEVEL_19_1_SYSTEM_INTEGRATION_VALIDATION.zip

docs/dev/COMMIT_COMMENT.txt

@@ -1,5 +1,5 @@
-Level 18.8 PR Consolidation (Overlay Slice)
+Level 19.1 System Integration Validation
 
-- Consolidated overlay PRs into capability units
-- Reduced fragmentation
-- Updated documentation structure
+- Validated cross-system interaction
+- Checked for hidden coupling
+- Confirmed stable integration

docs/dev/reports/BUILD_PR_LEVEL_19_1_SYSTEM_INTEGRATION_VALIDATION_report.md

@@ -0,0 +1,70 @@
+# BUILD_PR_LEVEL_19_1_SYSTEM_INTEGRATION_VALIDATION Report
+
+Date: 2026-04-16  
+Scope: cross-system validation only (no runtime/code changes)
+
+## Objective
+Validate integration points across:
+- Rendering
+- Input
+- Physics
+- State/Replay
+- Networking
+- Debug platform
+
+Identify hidden coupling and regression risks.
+
+## Validation Executed
+1. `npm test`
+2. `node ./scripts/run-node-tests.mjs`
+3. `node --input-type=module -e "import('./tests/samples/SamplesProgramCombinedPass.test.mjs').then(m => m.run())"`
+4. `node --input-type=module -e "import('./tests/runtime/Phase17OverlayGameplayRuntimeIntegration.test.mjs').then(m => m.run())"`
+5. `node --input-type=module -e "import('./tests/runtime/Phase19OverlayExpansionFramework.test.mjs').then(m => m.run())"`
+6. `node --input-type=module -e "import('./tests/runtime/Phase17OverlayMultiLayerComposition.test.mjs').then(m => m.run())"`
+7. `node --input-type=module -e "import('./tests/runtime/LaunchSmokeAllEntries.test.mjs').then(m => m.run())"`
+
+## Results Summary
+- `npm test`: **FAIL** at pretest guard (`checkSharedExtractionGuard`)
+  - `baseline_expected=397`
+  - `baseline_unexpected=288`
+  - `total_violations=614`
+- `scripts/run-node-tests.mjs`: **FAIL** at `SamplesProgramCombinedPass`
+  - Assertion in `tests/samples/SamplesProgramCombinedPass.test.mjs:40`
+- Focused integration runtime tests:
+  - `PASS Phase17OverlayGameplayRuntimeIntegration`
+  - `PASS Phase19OverlayExpansionFramework`
+  - `PASS Phase17OverlayMultiLayerComposition`
+- End-to-end launch smoke:
+  - `PASS=271 FAIL=0 TOTAL=271`
+  - Artifact updated: `docs/dev/reports/launch_smoke_report.md`
+
+## Integration Point Validation
+- Rendering/Input/Physics integration: covered by broad game/runtime test passes before suite stop and by launch smoke pass.
+- State/Replay integration: `ReplaySystem`, `ReplayTimeline` passed in full run before stop.
+- Networking integration: `MultiplayerNetworkingStack`, `NetworkDebugAndServerDashboardCloseout` passed in full run before stop.
+- Debug platform integration: `DebugVisualizationLayer`, `DevConsoleDebugOverlay`, and overlay runtime tests passed.
+
+## Hidden Coupling Findings
+1. **Phase-count coupling in sample validation (blocking full-suite completion)**
+   - `tests/samples/SamplesProgramCombinedPass.test.mjs:20` hardcodes phases `01..15`.
+   - Current repo includes `phase-16` through `phase-19`, triggering deterministic failure at line 40.
+
+2. **Policy coupling in shared-extraction guard (blocking pretest)**
+   - Guard failure shows wide path-policy and helper-policy coupling (`direct-shared-relative-import`, `inline-helper-clone`, `local-helper-definition`).
+   - Overlay-adjacent hotspots include:
+     - `samples/phase-17/shared/overlayGameplayRuntime.js`
+     - `samples/phase-17/shared/overlayRuntimeExtensionNormalization.js`
+     - `samples/phase-19/shared/overlay/createPhase19OverlayPluginRegistry.js`
+     - `src/engine/debug/standard/threeD/panels/*`
+     - `src/engine/debug/standard/threeD/providers/*`
+
+3. **Test-suite execution coupling**
+   - Single early failure in `SamplesProgramCombinedPass` halts subsequent explicit `run()` tests in `tests/run-tests.mjs`, reducing visibility for downstream regressions.
+
+## Conclusion
+- Cross-system runtime behavior appears stable based on targeted integration tests and full launch smoke sweep (`271/271` pass).
+- Full CI-style suite is currently **not green** due to two pre-existing blockers:
+  - shared-extraction guard baseline drift
+  - sample phase-grouping hardcoded to phase 15
+
+No runtime/code changes were made in this PR slice.