- Add async optimization using futures for concurrent file processing
- Implement intelligent caching system with SHA256 file change detection
- Add comprehensive custom error handling for Gemini API responses
- Fix critical error handling issues throughout the codebase
- Replace fragile JSON parsing with proper struct-based deserialization
- Add automatic retry logic for rate limits and network issues
- Improve user experience with detailed error messages and progress feedback
- Add cache persistence and automatic cleanup of old entries
- Optimize performance for batch processing scenarios
