Cline
An open-source coding agent inside VS Code with plan/act modes and MCP tools.

Best for
VS Code users who want an agent they can inspect and point at their own API keys.
Why it deserves attention
Cline adds an agent panel to VS Code that reads the workspace, proposes edits, runs terminal commands, and can use MCP servers or a browser. Plan and act are separate steps, so you see the intended change before files are touched, and the extension is open source with bring-your-own model keys. Token usage and cost are visible but easy to underestimate on large tasks.
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