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| 1 | +# PLAN_PR_LEVEL_19_12_COMPLETE_REMAINING_18_19 |
| 2 | + |
| 3 | +## Purpose |
| 4 | +Close the active Level 18 overlay hardening lane by finishing the last in-scope item, then run completion validation for Level 19 with status-only roadmap promotion when execution evidence is clean. |
| 5 | + |
| 6 | +## Scope |
| 7 | +- Docs-first BUILD target definition only |
| 8 | +- No runtime/engine implementation in this PLAN |
| 9 | +- No repo-wide cleanup |
| 10 | + |
| 11 | +## Current Status Snapshot (from roadmap) |
| 12 | +- Level 18 has many long-horizon planned tracks, but the active execution lane indicates one remaining in-scope closure item in the engine-usage/boundary hardening slice. |
| 13 | +- Level 19 has Track A/C/F complete and promoted; Tracks B/D/E still show planned items and require explicit validation evidence before any broader promotion. |
| 14 | + |
| 15 | +## Proposed Next BUILD |
| 16 | +`BUILD_PR_LEVEL_19_12_COMPLETE_REMAINING_18_19` |
| 17 | + |
| 18 | +### Objective A — Finish Level 18 Last In-Scope Item |
| 19 | +- Complete the final active Level 18 overlay-slice closure item with the smallest testable delta. |
| 20 | +- Keep changes bounded to overlay/runtime hardening surfaces already in-progress. |
| 21 | +- Do not expand into unrelated Level 18 planned tracks. |
| 22 | + |
| 23 | +### Objective B — Validate Level 19 Completion State |
| 24 | +- Execute validation focused on Level 19 completion criteria for already-implemented lanes. |
| 25 | +- Produce evidence report mapping each Level 19 track item to pass/fail/blocked. |
| 26 | +- Promote roadmap markers only where execution evidence exists. |
| 27 | +- Leave blocked or unvalidated items unchanged. |
| 28 | + |
| 29 | +## Constraints |
| 30 | +- One PR purpose only: close active Level 18 slice + validate/promote Level 19 status safely. |
| 31 | +- Do not modify `start_of_day` folders. |
| 32 | +- Preserve existing working-tree changes. |
| 33 | +- Status-only roadmap updates (`[ ]`, `[.]`, `[x]`) and only for directly validated items. |
| 34 | +- Smallest scoped valid tests only. |
| 35 | + |
| 36 | +## Validation Targets (for BUILD) |
| 37 | +- `npm test` |
| 38 | +- `node ./scripts/run-node-tests.mjs` |
| 39 | +- `npm run test:launch-smoke` |
| 40 | +- Any focused overlay/runtime tests touched by the Level 18 closure item |
| 41 | + |
| 42 | +## Required BUILD Outputs |
| 43 | +- Implementation/status changes for the in-scope Level 18 item |
| 44 | +- Roadmap status marker updates for directly validated Level 19 items only |
| 45 | +- `docs/dev/reports/change_summary.txt` |
| 46 | +- `docs/dev/reports/validation_checklist.txt` |
| 47 | +- `docs/dev/reports/file_tree.txt` |
| 48 | +- `docs/dev/reports/BUILD_PR_LEVEL_19_12_COMPLETE_REMAINING_18_19_evidence.md` |
| 49 | + |
| 50 | +## Exit Criteria |
| 51 | +- The final active Level 18 in-scope item is complete and validated. |
| 52 | +- Level 19 completion state is evidence-backed and roadmap markers are accurate. |
| 53 | +- No unrelated code/doc churn. |
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