vscode-diff-mcp

Review, edit, and approve AI-proposed changes in VS Code's native diff editor before they are applied.

Companion extension for the vscode-diff-mcp MCP server. Works with any MCP client: opencode, Claude Code, Codex, Cursor, and more.

How it works

1. An AI agent calls edit_with_diff / write_with_diff instead of editing a file directly.
2. This extension opens the change in VS Code's native diff editor (old vs new).
3. You review — and can edit the proposal by hand — then click Accept or Reject (Cmd+Enter / Cmd+Shift+Enter; closing the editor counts as reject).
4. On accept, the MCP server applies the approved content to the file. Nothing is written on reject.

Requirements

• VS Code 1.94+
• The vscode-diff-mcp MCP server configured in your MCP client (see the repo README)

[!NOTE] If the extension is missing, the MCP server auto-installs it silently (code --install-extension iamseb4s.vscode-diff-mcp) when no heartbeat arrives within 10s of startup.

Features

• Native diff editor with accept/reject buttons in the editor title bar
• Keyboard shortcuts: Cmd+Enter accept, Cmd+Shift+Enter reject (macOS); Ctrl+Enter / Ctrl+Shift+Enter elsewhere
• The diff opens in the active editor column — no split-screen surprises
• With multiple windows open, each diff appears in the window where its agent is running, even when another window has focus
• Manual edits you make in the diff flow back to the agent
• All requests to the MCP server are authenticated with a per-instance bearer token (loopback only)

License

MIT