Aider

Aider is an open-source command-line tool that lets developers pair programme with leading LLMs — including Claude, GPT-4o, DeepSeek, and local models — directly inside their terminal. It maps the entire codebase to provide context, automatically commits AI-generated changes with sensible messages, and integrates with linters and test suites. With 44K GitHub stars and 6.8M installs, it is one of the most widely adopted AI coding assistants available.