Aider, released in 2023, works entirely from the command line rather than inside an IDE, and pairs that terminal-first design with a specific, practical feature most coding assistants skip: it automatically writes and applies git commits with sensible messages for the changes it makes, keeping a clean, reviewable history rather than one large uncommitted diff.
It's also model-agnostic by design, connecting to whichever LLM a developer wants to use rather than being built around one proprietary model, which has made it a favorite among developers who want to swap models as better or cheaper options become available. That lightweight, editor-independent approach appeals specifically to developers who prefer their existing terminal and editor setup over adopting a new AI-native IDE.
Aider is free and open source, with the underlying model API costs paid separately to whichever provider a user connects. For a developer who wants a fast, scriptable, git-aware coding assistant that works alongside their existing tools rather than replacing their editor entirely, Aider's terminal-first, model-agnostic design remains a distinct choice in a category increasingly dominated by full IDE replacements.
