Implements bd-au0.2, completing all P0 tasks in the command standardization epic.
Changes:
- Add --add-label, --remove-label, --set-labels flags to bd update
- Support multiple labels via repeatable flags
- Implement in both daemon and direct modes
- Add comprehensive tests for all label operations
The bd update command now supports:
bd update <id> --add-label <label> # Add one or more labels
bd update <id> --remove-label <label> # Remove one or more labels
bd update <id> --set-labels <labels> # Replace all labels
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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