- L1: Add checkpoint/resume capability with --resume flag
- load_checkpoint(), save_checkpoint(), clear_checkpoint() in utils.sh
- Auto-saves progress after each story, 7-day expiration
- L2: Add comprehensive --help option with grouped options and examples
- show_help() function with environment variables and file locations
- L3: Add verbose Claude output streaming
- execute_claude_verbose() for real-time output when --verbose set
- L4: Add metrics file archival to prevent unbounded growth
- Archives to metrics/archive/, keeps last 10 per epic
- L5: Add workflow file content validation
- validate_yaml_content(), validate_xml_content() with fallbacks
- Integrated into validate_workflows()
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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