# Session Handoff -- Project 06 Capstone

## Last Session: 2026-03-30

### What Was Accomplished

1. **Structured Logging** -- Implemented full JSON logging module:
   - `logger.ts` with Logger, ServiceLogger, and LogLevel enum
   - Singleton `logger` instance with `forService()` factory
   - All 5 services emit structured JSON with timestamp, level, service, message, data
   - IPC handlers log every channel invocation

2. **Feedback Collection** -- Complete feedback pipeline:
   - `FeedbackEntry` type in shared/types.ts
   - `QaService.submitFeedback()` and `getFeedback()` methods
   - `feedback:submit` and `feedback:list` IPC channels
   - Preload bridge exposes `feedback.submit()` and `feedback.list()`
   - ConversationHistory shows thumbs up/down buttons
   - App.tsx shows feedback buttons on latest response

3. **Conversation History** -- Full chat-style component:
   - Chat bubbles with distinct user/assistant styling
   - Expandable citations with toggle button
   - Confidence indicator with color coding
   - Timestamps on each message
   - Clear history with confirmation dialog
   - Feedback buttons on each assistant response

4. **Clean State Reset** -- Complete data reset:
   - `app:reset` IPC channel
   - `PersistenceService.resetAll()` removes and recreates data directory
   - App.tsx Reset button with confirmation dialog
   - React state cleared after reset

5. **Benchmark Scripts** -- Performance measurement:
   - `scripts/benchmark.sh` with import, index, query, and verify tasks
   - `scripts/cleanup-scanner.sh` for stale artifact detection

6. **Complete Harness** -- All files:
   - AGENTS.md, CLAUDE.md, feature_list.json (15 features, all pass)
   - init.sh, session-handoff.md, clean-state-checklist.md
   - evaluator-rubric.md, quality-document.md
   - docs/ARCHITECTURE.md, docs/PRODUCT.md, docs/RELIABILITY.md

### What Remains

No remaining features for Project 06. All 15 features in feature_list.json are at status "pass".

### Decisions Made

- Used singleton Logger with factory method for per-service loggers over per-instance loggers
- Feedback stored in dedicated feedback.json for separation of concerns
- Clean state uses destructive rmSync over selective file deletion for simplicity
- Benchmark scripts written in bash for zero-dependency operation
- ConversationHistory uses virtual scrolling approach (simple state-based) over complex library

### Files Modified

- `src/shared/types.ts` -- Added FeedbackEntry, RESET_DATA, SUBMIT_FEEDBACK, GET_FEEDBACK, CLEAR_HISTORY
- `src/services/logger.ts` -- Full structured JSON logging with LogLevel enum
- `src/services/persistence-service.ts` -- Added resetAll() with logging
- `src/services/document-service.ts` -- Full logging, hasPersistedData(), size validation
- `src/services/indexing-service.ts` -- Duration logging, throughput metrics, doc status updates
- `src/services/qa-service.ts` -- Feedback methods, duration logging, expanded patterns
- `src/main/main.ts` -- Enhanced logging, before-quit handler
- `src/main/ipc-handlers.ts` -- All 14 channels with logging
- `src/preload/preload.ts` -- Added feedback and app namespaces
- `src/renderer/App.tsx` -- View mode switching, reset button, feedback on response
- `src/renderer/components/ConversationHistory.tsx` -- Full chat-style with citations and feedback
- `src/renderer/components/DocumentDetail.tsx` -- Delete, indexing state, refresh callback
- `src/renderer/components/DocumentList.tsx` -- Chunk count display
- `src/renderer/components/StatusBar.tsx` -- Indexed count
- `src/renderer/types.d.ts` -- Added feedback and app types

### Blockers

None.

### Next Steps

Project 06 is complete. This is the final project in the Learn Harness Engineering course.