Work: Session Hygiene Extension

Intent

W001: Create extension directory structure
- Verification: ls ~/.pi/agent/extensions/session-hygiene/index.ts
W002: Implement git status helper
W003: Implement footer widget showing dirty file count
- Verification: pi -e ~/.pi/agent/extensions/session-hygiene -p "test" 2>&1 | head -5 (no syntax errors)
W003: Implement footer widget showing dirty file count
- Verification: Start pi in a dirty repo, observe widget shows file count
W004: Hook tool_result to update widget after bash/write/edit
- Verification: In pi, write a file, observe widget count increases
W005: Implement git_commit tool (stage files + commit)
- Verification: pi -p "Use git_commit to commit README.md with message 'test: verify tool'" in test repo

W006: Implement session context extraction (recent messages, file touchpoints)
- Verification: /commit in pi shows context being gathered (log or notify)
W007: Implement /commit command that injects context and triggers LLM
- Verification: /commit in dirty repo triggers LLM response with grouping proposal
W008: Verify full flow: /commit → LLM groups → git_commit calls → widget updates
- Verification: End-to-end test in a repo with 5+ changed files across different paths

(2026-01-24 23:xx) W001: ls ~/.pi/agent/extensions/session-hygiene/index.ts → exists
(2026-01-24 23:xx) W002: jiti load fails on missing module (expected) — syntax valid
(2026-01-24 23:xx) W003: Widget shows "4 files" in dim gray, disappears after commit
(2026-01-24 23:xx) W004: Widget updates after file writes
(2026-01-24 23:xx) W005: git_commit tool worked — committed docs, widget disappeared

Extension location: ~/.pi/agent/extensions/session-hygiene/
Will use belowEditor widget placement — need to verify it looks right
For /commit context injection, use pi.sendUserMessage() or before_agent_start message injection
Model for grouping: use whatever model is currently active (no separate API key needed)