Final confirmation of engine/tool boundary integrity (Phase 19 closeout)

BUILD_PR_LEVEL_19_25_ENGINE_TOOL_BOUNDARY_FINAL_CONFIRMATION

Author: DavidQ

docs/dev/CODEX_COMMANDS.md

@@ -1,13 +1,12 @@
 MODEL: GPT-5.3-codex
 REASONING: high
 
-Execute BUILD_PR_LEVEL_19_24_ENGINE_TOOL_LEAK_REMEDIATION_GATE:
+Execute BUILD_PR_LEVEL_19_25_ENGINE_TOOL_BOUNDARY_FINAL_CONFIRMATION:
 
-1. Read validation output from 19_23
-2. If violations exist:
-   - remove tool-specific dependencies from src/engine
-   - relocate logic to tools or shared layers
-   - preserve engine contracts
-3. Re-run boundary validation
-4. Output final report to docs/dev/reports
-5. Produce ZIP artifact
+1. Re-run boundary validation across src/engine
+2. Confirm no tool-specific logic remains
+3. Cross-check previous violation reports
+4. Produce final confirmation report
+5. If clean:
+   - update roadmap status [ ] -> [x] for Track E final item
+6. Do not modify any other roadmap text

docs/dev/COMMIT_COMMENT.txt

@@ -1,3 +1,3 @@
-Engine/tool leak remediation gate (Phase 19 closeout)
+Final confirmation of engine/tool boundary integrity (Phase 19 closeout)
 
-BUILD_PR_LEVEL_19_24_ENGINE_TOOL_LEAK_REMEDIATION_GATE
+BUILD_PR_LEVEL_19_25_ENGINE_TOOL_BOUNDARY_FINAL_CONFIRMATION

docs/dev/reports/BUILD_PR_LEVEL_19_25_ENGINE_TOOL_BOUNDARY_FINAL_CONFIRMATION_report.md

@@ -0,0 +1,47 @@
+# BUILD_PR_LEVEL_19_25_ENGINE_TOOL_BOUNDARY_FINAL_CONFIRMATION Report
+
+Date: 2026-04-17
+Scope: Final docs-only confirmation gate for Phase 19 Track E (`confirm no tool-specific logic leaks into engine`).
+
+## Inputs Cross-Checked
+- `docs/dev/reports/BUILD_PR_LEVEL_19_23_ENGINE_TOOL_BOUNDARY_LEAK_VALIDATION_report.md`
+- `docs/dev/reports/BUILD_PR_LEVEL_19_24_ENGINE_TOOL_LEAK_REMEDIATION_GATE_report.md`
+
+## Historical Comparison
+- 19_23: **FAIL** for tool-specific logic in engine due to `src/engine/editor`, `src/engine/tooling`, `src/engine/pipeline`.
+- 19_24: Remediation moved those surfaces to `tools/shared/*`, removed legacy engine directories, and passed focused validation.
+
+## Final Re-Validation (This PR)
+Validation target: `src/engine` only.
+
+Checks executed:
+1. Legacy tool-layer directories present?
+- `src/engine/editor`
+- `src/engine/tooling`
+- `src/engine/pipeline`
+
+2. Engine import leakage to tools?
+- any `import/require` references from `src/engine` into `/tools/`.
+
+3. Engine import leakage to removed legacy layers?
+- any references to `/src/engine/editor/`, `/src/engine/tooling/`, `/src/engine/pipeline/` or local `./editor|./tooling|./pipeline` patterns.
+
+4. Known previously leaked tool symbols inside engine files?
+- `LevelEditor`, `TileMapEditor`, `EntityPlacementEditor`, `TimelineEditor`
+- `DeveloperConsole`, `RuntimeInspector`, `PropertyEditor`, `LiveTuningService`, `AssetBrowser`, `SceneGraphViewer`, `CapturePreviewRuntime`, `bootCapturePreview`
+- `AssetImportPipeline`, `TexturePreprocessPipeline`, `AudioPreprocessPipeline`, `ContentMigrationSystem`, `BuildAssetManifestSystem`, `ContentValidationPipeline`
+
+Results:
+- `ENGINE_FILE_COUNT = 272`
+- `LEGACY_DIRS_PRESENT = 0`
+- `ENGINE_TO_TOOLS_IMPORTS = 0`
+- `ENGINE_LEGACY_LAYER_IMPORTS = 0`
+- `KNOWN_LEAK_SYMBOL_HITS = 0`
+
+## Verdict
+- Final boundary confirmation: **PASS**
+- No tool-specific logic remains in `src/engine` per this validation gate.
+
+## Roadmap Status
+- Track E final item is already set to `[x]` in `docs/dev/roadmaps/MASTER_ROADMAP_HIGH_LEVEL.md`.
+- No roadmap text or status marker changes were required in this PR.

docs/dev/reports/change_summary.txt

@@ -1 +1 @@
-Docs-only remediation gate
+Docs-only final confirmation gate

docs/dev/reports/validation_checklist.txt

@@ -1,3 +1,3 @@
-[ ] violations removed
 [ ] validation re-run
-[ ] pass confirmed
+[ ] zero violations
+[ ] roadmap status updated

docs/pr/BUILD_PR_LEVEL_19_25_ENGINE_TOOL_BOUNDARY_FINAL_CONFIRMATION.md

@@ -0,0 +1,21 @@
+# BUILD_PR_LEVEL_19_25_ENGINE_TOOL_BOUNDARY_FINAL_CONFIRMATION
+
+## Purpose
+Final confirmation that Phase 19 Track E is fully closed:
+no tool-specific logic exists in engine after remediation.
+
+## Scope
+- docs-only
+- final validation gate
+- no implementation authored here
+
+## Codex Responsibilities
+- run full boundary validation pass
+- confirm zero violations
+- cross-check against previous reports (19_23, 19_24)
+- produce final confirmation report
+
+## Acceptance
+- zero violations confirmed
+- prior violations resolved
+- Phase 19 Track E can be marked [x]