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# Implementation Summary

**Session ID**: `phase23-session07-scanner-and-golden-age-states` **Package**: apps/web **Completed**: 2026-07-05 **Duration**: 1 hour

***

## Overview

Session 07 added product-facing battlefield states for scanner lifecycle and clean repository conditions. The battlefield now distinguishes scan-not-run, Dispatch Scouts, failed scan, Legion-present, mock drill, zero-hero, and Golden Age states from existing Quest Board state, ranked camps, visible heroes, and mock mode. Failed scanner snapshots preserve existing camps, while successful clean snapshots still clear camps and enable Golden Age.

***

## Deliverables

### Files Created

| File                                                        | Purpose                                                                                           | Lines |
| ----------------------------------------------------------- | ------------------------------------------------------------------------------------------------- | ----- |
| `apps/web/src/lib/battlefieldScannerState.ts`               | Pure classifier for battlefield scanner lifecycle states.                                         | 176   |
| `apps/web/src/components/battlefield/ScannerStateLayer.tsx` | Presentation layer for scanner, scouts, failed-scan, drill, zero-hero, and Golden Age treatments. | 145   |
| `apps/web/tests/battlefieldScannerState.test.ts`            | Focused classifier coverage for scanner state branches.                                           | 201   |

### Files Modified

| File                                                  | Changes                                                                              |
| ----------------------------------------------------- | ------------------------------------------------------------------------------------ |
| `.gitignore`                                          | Added local public website copy ignore rule.                                         |
| `.spec_system/state.json`                             | Recorded Session 07 as planned and validated during the session.                     |
| `apps/web/src/components/battlefield/Battlefield.tsx` | Derived scanner state, wired dispatch timer cleanup, and rendered the scanner layer. |
| `apps/web/src/lib/gameProjection.ts`                  | Preserved existing camps for failed scanner snapshots.                               |
| `apps/web/src/index.css`                              | Added scanner, scout, Golden Age, failed-scan, drill, and reduced-motion styles.     |
| `apps/web/tests/Battlefield.test.tsx`                 | Added battlefield scanner UI coverage.                                               |
| `apps/web/tests/gameProjection.test.ts`               | Added failed-scan preservation and clean-scan clearing regressions.                  |

***

## Technical Decisions

1. **Pure scanner classifier**: Kept lifecycle classification in a testable helper so battlefield rendering stays presentation-only.
2. **Quest Board remains scanner authority**: Used existing normalized scanner state and projection selectors instead of adding protocol events, storage keys, server routes, or hosted state.
3. **Failed scans do not reconcile camps**: Returned the previous projection for failed scanner snapshots so failures are visible without fabricating or erasing enemy progress.
4. **Reduced-motion parity**: Added static scanner status presentation for motion-sensitive users.

***

## Test Results

| Metric        | Value                           |
| ------------- | ------------------------------- |
| Focused Tests | 67 passed                       |
| Full Suite    | 3263 passed, 1 skipped          |
| Coverage      | N/A - no coverage reporter used |

***

## Lessons Learned

1. Short-lived battlefield transition state needs explicit visible rendering and timer cleanup coverage.
2. Failed scanner outcomes are best modeled as presentation state while the projection remains unchanged.

***

## Future Considerations

Items for future sessions:

1. Session 08 should update final phase documentation and release evidence.
2. Future scanner configuration or diagnostics should remain outside the battlefield product surface.

***

## Session Statistics

* **Tasks**: 22 completed
* **Files Created**: 3
* **Files Modified**: 7
* **Tests Added**: 67 focused passing tests
* **Blockers**: 0 resolved


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