docs: audit and fix features.md against actual codebase
- Fix all agent models/fallbacks (ground truth: model-requirements.ts)
- Add missing agents: Atlas, Sisyphus-Junior
- Fix Multimodal-Looker tool restrictions (read only, not read/glob/grep)
- Add missing tools: grep, glob, edit, look_at, skill, task system tools
- Add missing commands: /stop-continuation, /handoff
- Remove non-existent hooks: empty-message-sanitizer, background-compaction, grep-output-truncator
- Add 19 undocumented hooks with correct event types
- Fix Claude Code compatibility paths (MCP, commands, skills)
- Remove unverified Data Storage section (todos/transcripts)
- Add features.md link to README Highlights
0f30b5068d