- Add auto-detection of project root and story directories
- Enable scripts to work from any working directory
- Add explicit path override options via CLI arguments
- Improve error messages with suggested paths when files not found
- Update smart batching to show options only when time_saved > 0
- Reduce decision fatigue by skipping batching menu when no benefit
- Add --epic flag to filter validation to specific epic (e.g., epic-1)
- Add --mode flag with 'validate' and 'fix' options
- Filter logic extracts epic number and matches story file prefixes
- Enables per-epic validation for validate-all-epics workflow
Part of: validate-all-epics workflow infrastructure