- Adds checkGitHooks() function to verify recommended hooks are installed
- Checks for pre-commit, post-merge, and pre-push hooks
- Warns if hooks are missing with install instructions
- Shows up early in diagnostics (even if .beads/ missing)
- Includes comprehensive test coverage
- Filed bd-6049 for broken --json flag
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Co-Authored-By: Claude <noreply@anthropic.com>