> For the complete documentation index, see [llms.txt](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/.spec_system/archive/sessions/phase25-session01-mission-write-contract-preview-commit/implementation_summary.md).

# Implementation Summary

**Session ID**: `phase25-session01-mission-write-contract-preview-commit` **Completed**: 2026-06-08 **Duration**: 0.2 hours

***

## Overview

This session split Mission Control optimize semantics into an explicit preview and commit flow. Optimize now returns a non-persisted preview, commit writes the validated mission through the existing admin-gated store path, and the hook/component layer no longer treats optimize as an active-state write.

***

## Deliverables

### Files Created

| File                                                                                                   | Purpose                                     | Lines |
| ------------------------------------------------------------------------------------------------------ | ------------------------------------------- | ----- |
| `.spec_system/specs/phase25-session01-mission-write-contract-preview-commit/validation.md`             | Validation record for the completed session | \~80  |
| `.spec_system/specs/phase25-session01-mission-write-contract-preview-commit/IMPLEMENTATION_SUMMARY.md` | Session completion summary                  | \~30  |

### Files Modified

| File                                                                            | Changes                                                                         |
| ------------------------------------------------------------------------------- | ------------------------------------------------------------------------------- |
| `scripts/lib/hermes-admin-bridge.ts`                                            | Added preview optimize behavior and the commit endpoint.                        |
| `scripts/lib/__tests__/hermes-admin-bridge.test.ts`                             | Added regression and rejection coverage for preview and commit.                 |
| `src/lib/hermes-admin-types.ts`                                                 | Added preview and commit contract parsing.                                      |
| `src/lib/__tests__/hermes-admin-types.test.ts`                                  | Added parser coverage for preview and commit payloads.                          |
| `src/hooks/use-hermes-admin.ts`                                                 | Added `commitMission` and separated preview invalidation from persisted writes. |
| `src/hooks/__tests__/use-hermes-admin.test.tsx`                                 | Added hook coverage for preview and commit flows.                               |
| `src/components/hermes/hermes-mission-control.tsx`                              | Removed copy/behavior that implied optimize was already active.                 |
| `src/components/hermes/__tests__/hermes-mission-control.test.tsx`               | Added coverage for the updated Mission Control behavior.                        |
| `.spec_system/state.json`                                                       | Marked the session complete and cleared the active session.                     |
| `.spec_system/PRD/phase_25/PRD_phase_25.md`                                     | Updated phase progress and session tracker.                                     |
| `.spec_system/PRD/phase_25/session_01_mission_write_contract_preview_commit.md` | Marked the session stub complete.                                               |
| `package.json`                                                                  | Bumped patch version from `0.1.279` to `0.1.280`.                               |

***

## Technical Decisions

1. **Explicit preview/commit split**: optimize returns a preview envelope and does not mutate the mission store, which removes the silent-success path.
2. **Reuse existing store helpers**: commit uses the current mission store and validation helpers instead of adding a second persistence path.
3. **Hook-mediated writes only**: the client continues to use `useHermesAdmin` so the admin gate remains centralized.

***

## Test Results

| Metric                  | Value  |
| ----------------------- | ------ |
| Validation files        | 7      |
| Validation tests passed | 172    |
| Typecheck               | Passed |
| Script typecheck        | Passed |

***

## Lessons Learned

1. The preview/commit boundary needs to be explicit in both contracts and UI copy.
2. The admin bridge remains the right place to enforce payload validation and write confinement.

***

## Future Considerations

1. Session 04 should render the preview state and give operators an explicit commit action.
2. Later Phase 25 sessions can extend the same commit model to multi-goal mission authoring.

***

## Session Statistics

* **Tasks**: 22 completed
* **Files Created**: 2
* **Files Modified**: 12
* **Tests Added**: 4 focused files
* **Blockers**: 0 resolved


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