Aider

Aider is an open-source AI pair-programming tool that runs in a terminal and works with a new or existing codebase. It maps the repository for context, lets a developer request edits conversationally, and records changes through Git so the result can be diffed, undone, and reviewed with familiar tools.

Aider connects to cloud or local language models and can be used from an editor as well as the terminal. Images and web pages can supply context, voice input can request changes, and automatic linting and tests give the pair-programming loop a concrete verification step.

Supported use cases

Terminal pair programming

Implement a feature or fix in an existing repository while retaining Git history for review.

Local-model workflows

Use a local model for code changes when source or model execution must remain under the developer's control.

Test-driven maintenance

Ask for a change, run the project checks, and let Aider address problems found by linters or tests.