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# Implementation Summary

**Session ID**: `phase34-session05-runtime-api-ownership` **Completed**: 2026-06-26 **Duration**: 1 hour

***

## Overview

Completed Phase 34 Session 05 by moving AI Rogue pre-run selected-upgrade and progression-loadout ownership into simulation-owned APIs and narrowing the mounted runtime public entrypoint. Renderer/controller code now requests turn-0 simulation transitions instead of mutating run state directly, while product bridge code loads `runtime/mount` and the public barrel exposes only that mounted surface.

***

## Deliverables

### Files Created

| File                                                                                   | Purpose                                   | Lines |
| -------------------------------------------------------------------------------------- | ----------------------------------------- | ----- |
| `.spec_system/specs/phase34-session05-runtime-api-ownership/spec.md`                   | Session scope and acceptance contract     | 316   |
| `.spec_system/specs/phase34-session05-runtime-api-ownership/tasks.md`                  | Completed 20-task checklist               | 76    |
| `.spec_system/specs/phase34-session05-runtime-api-ownership/implementation-notes.md`   | Task-by-task implementation evidence      | 725   |
| `.spec_system/specs/phase34-session05-runtime-api-ownership/code-review.md`            | Review gate report                        | 96    |
| `.spec_system/specs/phase34-session05-runtime-api-ownership/security-compliance.md`    | Security and GDPR assessment              | 99    |
| `.spec_system/specs/phase34-session05-runtime-api-ownership/validation.md`             | Validation report                         | 237   |
| `.spec_system/specs/phase34-session05-runtime-api-ownership/IMPLEMENTATION_SUMMARY.md` | Update PRD closeout summary               | \~90  |
| `src/extensions/ai-rogue/runtime/mount.ts`                                             | Narrow mounted runtime entrypoint         | 37    |
| `src/extensions/ai-rogue/runtime/__tests__/pre-run-state.test.ts`                      | Simulation-owned pre-run transition tests | 148   |
| `src/extensions/ai-rogue/runtime/__tests__/runtime-boundary.test.ts`                   | Runtime public entrypoint boundary guards | 57    |

### Files Modified

| File                                                        | Changes                                                                    |
| ----------------------------------------------------------- | -------------------------------------------------------------------------- |
| `.spec_system/state.json`                                   | Marked Session 05 complete, cleared current session, and appended history. |
| `.spec_system/PRD/phase_34/PRD_phase_34.md`                 | Updated progress to 5/8, marked Session 05 complete, and added notes.      |
| `package.json`                                              | Incremented patch version from 0.5.36 to 0.5.37.                           |
| `README.md`                                                 | Synced visible version to 0.5.37.                                          |
| `docs/CHANGELOG.md`                                         | Added Phase 34 Session 05 closeout notes.                                  |
| `src/extensions/ai-rogue/runtime/simulation.ts`             | Added simulation-owned selected-upgrade and loadout transition APIs.       |
| `src/extensions/ai-rogue/runtime/renderer.ts`               | Replaced renderer-local pre-run mutations with simulation API calls.       |
| `src/extensions/ai-rogue/runtime/index.ts`                  | Narrowed the public barrel to the mounted runtime surface.                 |
| `src/extensions/ai-rogue/views/runtime-canvas.tsx`          | Loaded the narrow mounted runtime entrypoint.                              |
| `src/extensions/ai-rogue/__tests__/runtime-canvas.test.tsx` | Updated mounted runtime import mocks and assertions.                       |
| `src/extensions/ai-rogue/__tests__/client.test.tsx`         | Updated the runtime lazy-import boundary assertion.                        |

***

## Technical Decisions

1. **Simulation-owned pre-run transitions**: Selected-upgrade and loadout rules now live with headless simulation so renderer code requests state changes instead of duplicating game logic.
2. **Turn-0 guardrail**: Pre-run update helpers no-op after turn advancement or terminal status, preserving active-run integrity.
3. **Narrow mounted entrypoint**: Product bridge code imports `runtime/mount`; tests and internals must import simulation modules directly when needed.

***

## Test Results

| Metric                  | Value         |
| ----------------------- | ------------- |
| Focused ownership tests | 30 passed     |
| AI Rogue Vitest         | 297 passed    |
| Typecheck               | PASS          |
| Lint                    | PASS          |
| Format check            | PASS          |
| Coverage                | Not collected |

***

## Lessons Learned

1. Runtime barrels need source guards when product bridge imports and internal test utilities live near each other.
2. Pre-run state ownership is easier to reason about when freshness, turn guards, and derived resources are handled in one simulation-owned path.

***

## Future Considerations

Items for future sessions:

1. Session 06 should build on the narrowed runtime surface when moving durable save and hydration behavior behind schema-owned helpers.
2. Session 07 should defer renderer splitting until render hot-loop and audio documentation gates are complete.

***

## Session Statistics

* **Tasks**: 20 completed
* **Files Created**: 10
* **Files Modified**: 11
* **Tests Added**: Focused pre-run transition and runtime boundary coverage
* **Blockers**: 2 audit findings addressed


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