- Add string-similarity library for robust prompt comparison
- Extract Claude Code system prompts to separate contents module
- Implement similarity-based validation with configurable thresholds
- Support different validation logic for Haiku vs other Claude models
- Fix validation to properly handle array format system prompts
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
