Five minutes to the first check on your own repository.
Cadenza is a plugin for Claude Code. It runs on your machine, through your own accounts with the AI providers, and keeps its record in your own repository. Nothing is hosted by us. For one person it is free and whole.
The package is sent by hand today, with its checksum, the same day you ask: ask for it below. The public download opens here soon.
- Claude Code, the app or the command line, signed in to your own account. That account pays for the AIs' work, as it does today.
- Python 3.11 or newer on the machine. A Mac's built-in Python is older; install a newer one first.
- A repository your AI already works in. Cadenza installs beside it and writes its record there.
A second AI from another lab makes the stronger check. With only Claude on the machine, the second seat is a separately started Claude; an OpenAI key one setting away gives you both.
Three steps.
Install. Unzip the package anywhere outside your project, then in Claude Code, inside your project, type the two lines:
/plugin marketplace add ~/cadenza-plugin /plugin install cadenza@cadenzaSet it up. One command sets Cadenza up inside your repository and prints what it did, one line per file. Nothing is overwritten.
/cadenza-init --with-hosted-seatsOpen the window and ask. The Studio opens on your repository. Type what you want double-checked, press Check it, and watch two AIs argue it out before it comes to you to sign.
/cadenza-studio
Everything the AIs write, every catch and every signature stays in your repository, in plain text. The guards keep their logs on your machine and out of git. What it sends and what it keeps is on the security page.
Tell us where to send it. The package and its checksum come by mail the same day, from a person.
One person works free, whole, for as long as they like. A team pays $40 a person a month; a firm's price is set per firm. The pricing page has the rest, and the pilot is how a team starts.