Query

Runs SQL queries against DuckDB databases, either in session mode with attached databases or ad-hoc against files. It handles natural language questions by generating SQL using DuckDB's Friendly SQL idioms like FROM-first syntax, GROUP BY ALL, and direct file queries. The skill estimates result sizes before execution to avoid token-heavy outputs and warns you if you're about to pull back millions of rows without a LIMIT. It sandboxes ad-hoc queries with restricted file access and falls back gracefully when databases aren't accessible. Error handling is solid, automatically installing missing extensions and searching docs when things break. If you're already using DuckDB for data work, this gives you a conversational layer that knows the shortcuts.

Install to Claude Code

npx -y skills add duckdb/duckdb-skills --skill query --agent claude-code