Aider

Aider is an open-source AI pair programming tool that runs in your terminal and works directly with your local git repository. It can edit multiple files simultaneously, write tests, refactor code, and automatically commit changes with sensible messages. Aider supports all major LLMs including GPT-4o, Claude 3.5 Sonnet, and local models via Ollama. Its map-based codebase understanding gives it context beyond the currently open files, making it ideal for complex, multi-file tasks.