Pair programming in the terminal that commits as it goes and knows your repo's history. Built by Aider.
Others in coding agent
Claude CodeThe terminal agent, taught properly: the loop, the permissions, the files that make it behave.
Cline
Codex CLIThe coding agent, taught from the boundary in: what it may touch, and how you widen it.
CursorCommon questions
Is Aider free to use?
Aider is open source and free to run yourself. You still pay whichever model provider you point it at, and this tutorial is free with no signup.
Do I need to know Python to use Aider?
Basic Python is enough. Functions, dictionaries and imports cover most of what Aider asks of you.
When should I not use Aider?
When something else in coding agent fits the job better. The others in that group are listed below.
Lessons for Aider are being written. Meanwhile the APIs for AI tutorial covers the same ground: state, tools, loops, memory and human approval. Most of it carries straight over.
Start the APIs for AI tutorial →