Read File

This is a practical wrapper around DuckDB that lets Claude read pretty much any data format you throw at it: CSV, JSON, Parquet, Excel, shapefiles, SQLite databases, even Jupyter notebooks. It handles local files and remote URLs from S3, HTTPS, GCS, and Azure. The implementation uses a single macro that pattern matches file extensions and routes to the right DuckDB reader, then shows you the schema, row count, and a 20 row preview. Useful when you want Claude to quickly inspect or answer questions about a dataset without writing format specific code yourself. It will auto install DuckDB if missing and retry with the right extensions if spatial or Excel files fail on first attempt.