- Add `websearch` command to gsd-tools.js for Brave API
- Detect BRAVE_API_KEY env var or ~/.gsd/brave_api_key file
- Persist brave_search setting to config.json on project init
- Update researcher agents to check config before calling
Graceful degradation: if brave_search is false, agents use
built-in WebSearch without wasted Bash calls.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>