## CHANGES
- Add high-performance Go changelog generator with GraphQL integration
- Implement SQLite-based persistent caching for incremental updates
- Create one-pass git history walking algorithm with concurrent processing
- Add comprehensive CLI with cobra framework and tag-based caching
- Integrate AI summarization using Fabric CLI for enhanced output
- Support batch PR fetching with GitHub Search API optimization
- Add VSCode configuration with spell checking and markdown linting
- Include extensive documentation with PRD and README files
- Implement commit-PR mapping for lightning-fast git operations
- Add content hashing for change detection and cache optimization
