Merge set_context, where_am_i, and init into a single 'context' tool
with action parameter (set, show, init).
- set: Set the workspace root directory (default when workspace_root provided)
- show: Show current workspace context (default when no args)
- init: Initialize beads in the current workspace directory
This reduces tool count from 3 to 1 while maintaining all functionality.
Closes beads-eub
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Add _find_beads_db_in_tree() to walk up looking for .beads/*.db
- Update _get_client() to auto-detect when workspace not set
- Matches CLI behavior (no manual set_context needed after restart)
- Add 8 comprehensive tests for auto-detection
- Update existing tests to mock auto-detection in error cases
Fixes silent failures after Amp restart.
Amp-Thread-ID: https://ampcode.com/threads/T-c47f524d-c101-40d5-839a-659f52b9be48
Co-authored-by: Amp <amp@ampcode.com>
