Sketch

Sketch is an open-source, AI-assisted code-writing environment designed for data professionals who frequently work with databases, files, and APIs. Instead of treating code in isolation, Sketch connects directly to your data sources so the model can inspect table schemas, sample rows, and metadata before generating or modifying code. This context-aware approach helps produce more accurate SQL queries, data transformations, and analysis scripts.

The tool runs locally in your terminal and communicates with language models such as OpenAI, Anthropic, or other configured providers. Users can define “skills” that describe how to connect to different data systems or tools, making Sketch extensible for custom workflows. It supports iterative conversations, where you can ask the assistant to debug, refactor, or extend existing code while preserving project structure.