Diffsmith is a fast, native macOS app for reviewing local git changes made by AI coding agents like Claude Code, Cursor, Codex, and Copilot. It allows you to leave inline comments on uncommitted diffs and hand those notes back to the agent as a prompt or via a local MCP server.
Comment on your AI agent's code & collaborate on changes
- Reviewing code changes made by Claude Code, Cursor, or other AI agents before committing
- Providing inline feedback on uncommitted diffs without retyping file names and line numbers
- Collaborating with AI agents by copying comments as prompts or using MCP for direct replies
- Reviewing changes while the agent is still working to avoid a wall of changes at the end
- Open a repository in Diffsmith to view the uncommitted diff against HEAD or HEAD plus staged changes.
- Click any line to leave an inline comment anchored to that exact spot.
- Copy your comments as an AI-ready prompt and paste them into your agent, or switch on the local MCP server for direct agent replies.
- Use the sidebar to navigate all comments and mark hunks or files as read to collapse them.
- Review changes in real-time as files update on disk, and open multiple repositories simultaneously.
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