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# Implementation Summary

**Session ID**: `phase39-session01-baseline-and-registry-skeleton` **Completed**: 2026-06-30 **Duration**: 3.0 hours

***

## Overview

Completed the Phase 39 Session 01 baseline and registry skeleton. The session locks the current AI Rogue three-floor behavior with focused baseline and golden determinism tests, adds a pure dead-but-tested content registry for depths 1-3, extends Kernel Sentinel presentation coverage, and documents the Phase 39 asset generation plan without changing shipped runtime routing.

***

## Deliverables

### Files Created

| File                                                                   | Purpose                                                                          | Lines |
| ---------------------------------------------------------------------- | -------------------------------------------------------------------------------- | ----- |
| `src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`   | Depth 1-3 helper and product-safe runtime baseline coverage.                     | 153   |
| `src/extensions/ai-rogue/runtime/__tests__/golden-determinism.test.ts` | Safe deterministic world and first-turn run summaries for fixed seeds.           | 990   |
| `src/extensions/ai-rogue/runtime/content/types.ts`                     | Authored level spec, generation, placement, guarantee, and validation contracts. | 86    |
| `src/extensions/ai-rogue/runtime/content/levels.ts`                    | Initial three playable level specs and `levelSpecForDepth()`.                    | 148   |
| `src/extensions/ai-rogue/runtime/content/validate.ts`                  | Structural, reference, safe-text, finale, and shape validation.                  | 646   |
| `src/extensions/ai-rogue/runtime/content/index.ts`                     | Registry barrel exports for future resolver migration.                           | 9     |
| `src/extensions/ai-rogue/runtime/content/__tests__/levels.test.ts`     | Registry pass/fail and malformed-spec regression tests.                          | 196   |
| `docs/ongoing-projects/ai-rogue-phase-39-asset-generation-plan.md`     | Phase 39 asset generation planning note.                                         | N/A   |

### Files Modified

| File                                                                  | Changes                                                              |
| --------------------------------------------------------------------- | -------------------------------------------------------------------- |
| `src/extensions/ai-rogue/runtime/__tests__/boss-presentation.test.ts` | Extended Kernel Sentinel scale and audio metadata baseline coverage. |
| `.spec_system/state.json`                                             | Marked Session 01 completed and Phase 39 in progress.                |
| `.spec_system/PRD/phase_39/PRD_phase_39.md`                           | Updated Phase 39 progress, completed sessions, and upcoming session. |
| `README.md`                                                           | Updated project version reference.                                   |
| `package.json`                                                        | Incremented patch version.                                           |

***

## Technical Decisions

1. **Dead-but-tested registry**: Added level specs and validation before routing runtime callers so Session 02 can migrate depth resolvers behind a stable safety net.
2. **Authored main-run rejection**: `levelSpecForDepth()` rejects out-of-range depths while current helper clamp and rotation behavior remains untouched.
3. **Safe golden summaries**: Golden tests snapshot bounded public runtime facts instead of whole objects, private paths, prompts, transcripts, or generated local operator data.
4. **Validator trust boundary**: The registry validator rejects malformed nested metadata from unknown input so future authored content fails fast.

***

## Test Results

| Metric   | Value                          |
| -------- | ------------------------------ |
| Tests    | 4612                           |
| Passed   | 4612                           |
| Coverage | Not reported by `bun run test` |

Additional validation passed for focused AI Rogue suites, `bun run lint`, `bun run lint:md`, targeted Prettier, `bun run typecheck`, and `bun run typecheck:scripts`.

***

## Lessons Learned

1. Protocol routing needs separate baseline placement and floor-arc guarantee fields because the current runtime models both concepts.
2. Golden determinism is most useful when it captures stable product facts and avoids incidental full-object snapshots.
3. Registry validation needs nested shape checks as well as local reference checks to protect future content authoring.

***

## Future Considerations

Items for future sessions:

1. Route max depth and compatibility resolvers through the level registry in Session 02 while keeping depth 1-3 golden output stable.
2. Add ID parity and save-schema validation gates before adding new persisted content IDs.
3. Prove the authoring flow with a reused-media fourth floor before expanding enemy, boss, audio, or asset catalogs.

***

## Session Statistics

* **Tasks**: 16 completed
* **Files Created**: 8
* **Files Modified**: 5
* **Tests Added**: 16
* **Blockers**: 0 resolved


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