Letmediff MCP
The official Letmediff MCP server helping you review your code with an agent first workflow
Runs on your machine from its package; the steps are below.
What it does
- Reads
- Writes
- High impact
At most: only reads or looks up information.
What it costs
FreeOdel charges nothing per call. The publisher may charge for its own service.
Runs locally over stdio
This server isn't hosted — your MCP client launches it from a package registry. Use one of the commands below, or drop the config into your client (e.g. Claude Desktop).
Run
npx -y letmediff
MCP client config
{
"mcpServers": {
"letmediff-mcp": {
"command": "npx",
"args": [
"-y",
"letmediff"
]
}
}
}letmediff
letmediff is a review handoff tool for agent-driven coding sessions.
The CLI runs as an MCP server inside a local repository, captures the current worktree diff, and posts it to the web app. The web app renders the diff at a shareable URL and sends reviewer feedback back to the MCP client over server-sent events.
Workspace
This repository is a pnpm monorepo.
packages/letmediffcontains theletmediffMCP CLI.apps/letmediff.itcontains the SvelteKit app that stores, renders, and streams diff feedback.
Requirements
- Node.js compatible with the package dependencies
- pnpm
^11.2.2
Install
pnpm install
Local Development
Run the app:
pnpm --filter letmediff.it dev
Run the MCP server against the local app by setting URL:
URL=http://localhost:5173 pnpm --filter letmediff exec letmediff
When used by an MCP-compatible agent, the server exposes tools to create named checkpoints, create a hosted diff URL, and wait for reviewer feedback.
How It Works
- The MCP server snapshots the repository when it starts.
- The agent can create named checkpoints while it works.
- When a review URL is requested, the server sends the collected checkpoint diffs to the app.
- The app renders
/diff/[id]and keeps an/events/[id]SSE connection open. - Submitted feedback is streamed back to the MCP server so the agent can continue from the review notes.
