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# Implementation Summary

**Session ID**: `phase35-session06-simulation-ownership-refactor` **Completed**: 2026-06-26 **Duration**: 0.5 hours

***

## Overview

Completed Phase 35 Session 06 by narrowing AI Rogue simulation ownership while preserving the production-enabled runtime behavior. The session extracted run creation, pre-run selected-upgrade/loadout transitions, and deterministic snapshot assembly into explicit internal modules, kept compatibility exports for existing callers, strengthened runtime boundary tests, and recorded the remaining simulation split map for later refactor sessions.

***

## Deliverables

### Files Created

| File                                                                                           | Purpose                                      | Lines |
| ---------------------------------------------------------------------------------------------- | -------------------------------------------- | ----- |
| `src/extensions/ai-rogue/runtime/run-factory.ts`                                               | Run creation and pre-run transition owner    | \~482 |
| `src/extensions/ai-rogue/runtime/snapshot.ts`                                                  | Deterministic runtime snapshot assembly      | \~111 |
| `.spec_system/specs/phase35-session06-simulation-ownership-refactor/implementation-notes.md`   | Session evidence ledger and split follow-ups | \~768 |
| `.spec_system/specs/phase35-session06-simulation-ownership-refactor/code-review.md`            | Code review and repair report                | \~56  |
| `.spec_system/specs/phase35-session06-simulation-ownership-refactor/security-compliance.md`    | Security and GDPR review                     | \~63  |
| `.spec_system/specs/phase35-session06-simulation-ownership-refactor/validation.md`             | Validation report                            | \~198 |
| `.spec_system/specs/phase35-session06-simulation-ownership-refactor/IMPLEMENTATION_SUMMARY.md` | Final session summary                        | \~104 |

### Files Modified

| File                                                                        | Changes                                                                    |
| --------------------------------------------------------------------------- | -------------------------------------------------------------------------- |
| `.spec_system/state.json`                                                   | Marked Session 06 completed and cleared current session                    |
| `.spec_system/PRD/phase_35/PRD_phase_35.md`                                 | Updated Phase 35 progress to 6/10 and Session 06 complete                  |
| `README.md`                                                                 | Updated project version line to 0.5.48                                     |
| `docs/CHANGELOG.md`                                                         | Added Session 06 changelog entry                                           |
| `package.json`                                                              | Incremented patch version to 0.5.48                                        |
| `src/extensions/ai-rogue/runtime/simulation.ts`                             | Replaced factory/snapshot internals with imports and compatibility exports |
| `src/extensions/ai-rogue/runtime/renderer.ts`                               | Imported run factory and snapshot helpers from explicit internal modules   |
| `src/extensions/ai-rogue/runtime/__tests__/runtime-boundary.test.ts`        | Expanded public barrel, route, and fixture boundary source scans           |
| `src/extensions/ai-rogue/runtime/__tests__/pre-run-state.test.ts`           | Added factory option determinism and turn-zero revalidation coverage       |
| `src/extensions/ai-rogue/runtime/__tests__/simulation.test.ts`              | Updated snapshot determinism coverage for extracted modules                |
| `src/extensions/ai-rogue/runtime/__tests__/renderer-mount-failures.test.ts` | Added controller pre-run update guard coverage                             |

***

## Technical Decisions

1. **Factory ownership first**: Run creation and pre-run selected-upgrade or progression-loadout transitions now live in `run-factory.ts`, leaving command reducer behavior in `simulation.ts`.
2. **Snapshot assembly is explicit**: `snapshot.ts` owns deterministic runtime snapshot projection so same-seed and command-result snapshots remain easy to test outside the large simulation reducer.
3. **Compatibility exports stay during migration**: `simulation.ts` continues re-exporting existing symbols where needed so this refactor does not widen behavior change while Session 07 and Session 08 continue ownership splits.

***

## Test Results

| Metric   | Value                                      |
| -------- | ------------------------------------------ |
| Tests    | 4364 Vitest, 9 Playwright                  |
| Passed   | 4364 Vitest, 9 Playwright                  |
| Coverage | Not collected during this session closeout |

***

## Lessons Learned

1. Source-scan boundary tests are useful for keeping product route imports on the mounted runtime entrypoint while fixture access remains dev/test only.
2. Pre-run update helpers need active turn-zero revalidation at every caller boundary, not only during initial run creation.

***

## Future Considerations

Items for future sessions:

1. Session 07 can refactor renderer and React bridge ownership now that run creation and snapshots have explicit internal owners.
2. Session 08 should continue the world/type and fixture cleanup after the renderer bridge split is stable.
3. Later refactors can remove compatibility re-exports from `simulation.ts` after all direct consumers have migrated.

***

## Session Statistics

* **Tasks**: 20 completed
* **Files Created**: 7
* **Files Modified**: 11
* **Tests Added**: 7
* **Blockers**: 0 resolved


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