A

Aider

Open-source AI pair programming in your terminal with git-aware editing

open-source Terminal & CLI Tools cli open-source pair-programming git multi-file

Aider is an open-source CLI tool for AI pair programming. Maps your entire codebase for context-aware edits across multiple files, auto-commits changes with sensible messages, and works with Claude, GPT, and local models. Supports Python, JavaScript, Rust, Go, and dozens more languages.

Pricing

Free and open source (Apache 2.0), you pay only for LLM API usage