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| 1 | +# BUILD_PR_LEVEL_19_4_PERFORMANCE_SCALING_ROADMAP_PROMOTION |
| 2 | + |
| 3 | +## Purpose |
| 4 | +Promote roadmap status for Level 19 Track C performance/scaling work from planned to in-progress using existing execution-backed validation evidence. |
| 5 | + |
| 6 | +## Scope |
| 7 | +- one PR purpose only |
| 8 | +- no feature work |
| 9 | +- no broad repo scan |
| 10 | +- update roadmap status only where execution evidence exists |
| 11 | +- preserve unrelated working-tree changes |
| 12 | +- do not claim full global regression certification |
| 13 | + |
| 14 | +## Inputs |
| 15 | +- Existing performance report from `BUILD_PR_LEVEL_19_3_PERFORMANCE_SCALING_VALIDATION` |
| 16 | +- Latest validation note showing unrelated global blockers: |
| 17 | + - shared extraction guard baseline drift (`baseline_unexpected=288`) |
| 18 | + - `SamplesProgramCombinedPass.test.mjs` phase expectation drift (`phase-16` through `phase-19` now present) |
| 19 | + - launch smoke pass succeeded |
| 20 | + |
| 21 | +## Required Changes |
| 22 | +1. Copy the master roadmap into the repo tracker location: |
| 23 | + - `docs/dev/roadmaps/MASTER_ROADMAP_HIGH_LEVEL.md` |
| 24 | +2. In **19. Architecture Maturity & Long-Term Stability → Track C — Performance & Scaling**, update only these status lines: |
| 25 | + - `validate large scene performance` → `[.]` |
| 26 | + - `validate stress scenarios (1k+ entities)` → `[.]` |
| 27 | + - `validate memory stability` → `[.]` |
| 28 | + - `identify bottlenecks` → `[.]` |
| 29 | +3. Leave all other roadmap wording unchanged. |
| 30 | +4. Add/update a report capturing why these items are `[.]` and not `[x]`. |
| 31 | + |
| 32 | +## Validation To Run |
| 33 | +- Reconfirm the existing performance validation artifact is present and referenced. |
| 34 | +- Preserve the current global validation reality: |
| 35 | + - `npm test` may remain blocked by shared extraction guard baseline drift |
| 36 | + - `node ./scripts/run-node-tests.mjs` may remain blocked by sample phase expectation drift |
| 37 | + - `npm run test:launch-smoke` passes |
| 38 | + |
| 39 | +## Acceptance |
| 40 | +- A repo ZIP is produced at `<project folder>/tmp/BUILD_PR_LEVEL_19_4_PERFORMANCE_SCALING_ROADMAP_PROMOTION.zip` |
| 41 | +- Roadmap status is advanced only for Track C items backed by the validation report |
| 42 | +- Reports clearly state global certification remains blocked by unrelated failures |
| 43 | +- No implementation/runtime feature code is introduced in this PR |
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