Changes
- Add
spawn_subagentto delegate focused sub-tasks to isolated workers (general-purpose,research,analysis); emit multiple calls in one turn to run independent tasks in parallel - Add CLI subagent progress UI with per-delegate status, tool-use counts, and rolled-up activity
- Improve
web_fetchwith Readability/Turndown HTML-to-markdown, HTTP caching, and fast-model extraction from fetched pages