- Add class-level cache dictionary to store prompt/caption results - Add _build_cache_key() method that hashes image data + all parameters - Use sampled pixels for efficient image hashing of large images - Return cached results when seed and all inputs match - Print cache hit/miss messages for debugging 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>