Content-Hash File Cache Pattern Cache expensive file processing results (PDF parsing, text extraction, image analysis) using SHA-256 content hashes as cache keys. Unlike path-based caching, this approach survives file moves/renames and auto-invalidates when content changes. When to Activate - Building file processing pipelines (PDF, images, text extraction) - Processing cost is high and same files are processed repeatedly - Need a CLI option - Want to add caching to existing pure functions without modifying them Core Pattern 1. Content-Hash Based Cache Key Use file content (not path) as the c…