Database Sidekick turns plain English and diagrams into real database actions, powered by Google’s open-weight Gemma 4 through the Gemini API. Users can explore PostgreSQL, MySQL, and SQLite databases, uncover insights, and upload diagrams to create tables and relationships. Its agent inspects schemas, runs queries, and learns from execution results, while showing the SQL and requiring approval before changes. Built on an open-source stack, Sidekick makes database work more accessible, transparent, and reviewable.