Cline
Open-source autonomous coding agent for VS Code.
A VS Code extension that plans, edits files, and runs terminal commands with an approval step in front of each action. Because it is open source and model-agnostic, it is the best way to understand the mechanics of an agent loop — you can see every tool call it wants to make before it happens.
Best for
Seeing exactly what an agent is doing, and paying model costs directly.
Watch out for
Bring-your-own-key means bring-your-own-bill. Watch token spend on long runs.
Using this and stuck anyway?
Knowing the tool isn't the same as finishing the project. If yours has stopped moving, we'll take a look at it.
Tell us what's broken