v0.9.0

What's new

Explore agent 🔍

New opt-in explore agent — a fast, cheap, read-only codebase explorer for file discovery, repo walking, and context gathering. Leaf agent: no write tools, no invoke_agent. Pins a cheap default model via agent_model_explore.

Orchestrator is now strictly a router, not a planner

The orchestrator prompt was tightened: it routes already-understood work and delegates ALL planning, decomposition, and complex reasoning to planning-agent, with explicit complexity triggers. The instant a task stops being mechanical, it hands off.

Internal

• planning-agent now points at explore for cheap codebase exploration.
• Modernized theme-plugin typing (typing.Optional/Callable → collections.abc + X | None).
• Added explore-agent tests and an orchestrator delegation test.