Cline
open-sourceOpen-source VS Code extension that gives an AI coding agent access to your files and terminal.
Cline is an open-source extension for Visual Studio Code that orchestrates an autonomous coding agent: it can read and edit files, invoke the terminal, and iterate on tasks from natural-language instructions while showing its plan and diffs. Users bring their own API keys for model providers, which keeps the core tooling free while passing through inference costs.
It is popular with developers who want agentic behavior inside a familiar editor without switching to a forked IDE. Community contributions extend tool support, prompts, and integrations as the project evolves on GitHub.
Because it can execute shell commands, use it on trusted projects and review permissions carefully. Model quality and cost depend entirely on the provider and model you select.