Aider is an open-source AI pair programmer that runs in your terminal and edits the code in your project using the language model of your choice.
In plain words
You start Aider in a project folder and chat with it about changes. It builds a map of the whole codebase so it can work in large projects, edits the files, and commits each change to git with a descriptive message, so you can review or undo it. It connects to most cloud or local models and can also run lint and tests, take images or web pages as context, and listen to voice requests.
A quick example
In a repository, you type a request such as "add input validation to the signup form". Aider edits the relevant files and makes a git commit, so if you dislike the change you can undo it with normal git tools.
Where you'll meet it
- Terminal-based coding with an AI model.
- Working with local or cloud models on existing codebases.
Related
Sources
- DocsAider, Aider · read 29 Sept 2026
- DocsAider README, Aider-AI (GitHub) · read 29 Sept 2026
Checked by WhatIsAI against the sources above · 29 Sept 2026. Spotted an error? Report it.