Diffsmith

Diffsmith is a code review studio for local git changes made by Claude Code, Cursor, Codex, Copilot, or any other AI coding agent. Open a repo, read the uncommitted diff, and click any line to leave a comment anchored to that exact spot. Then hand your notes straight back to the agent. Supports MCP for viewing you're agent's replies to your comments directly at the line of code it relates to. Diffsmith is 100% offline and a one time purchase unlocks lifetime access.