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.

Install to Claude Code

npx -y skills add duckdb/duckdb-skills --skill read-file --agent claude-code