mumude 1.0: a decision model optimized for coding
mu's own decision model, trained for the decisions a coding agent makes and state of the art at making them. It runs on your machine, so what it judges never leaves it.
A judge that runs on your machine
2B parameters
One forward pass answers every question in a decision, each with a probability.
Judged locally
Its server runs on 127.0.0.1. What it judges never leaves your machine.
MIT license
Both editions are on Hugging Face, free to download.
On Hugging Face
One command on a Mac
One-click install works on Macs with Apple silicon today, with macOS 14 or later and at least 8 GB of memory. On such a Mac, mude is the recommended judge, and mu setup offers it first. While it runs, the server uses about 4 GB.
mu judge mude install # download (resumes after a stop), verify every file, start it on 127.0.0.1, make it the judge
mu judge mude status # what is installed, running and enabled
mu judge mude enable --local-only # mude only: nothing goes to a hosted judge
mu judge mude disable # back to the previous judge; stops its server
mu judge mude uninstall # remove the model and its Python environmentIn the desktop app
On other machines
Elsewhere, run the full edition (mude-1.0 on Hugging Face) with its own System One server, as its model card shows, and add it to ~/.mu/agent/mu.json as a typesafe judge. MUDE_KEY holds the key the server was started with:
{
"judges": {
"mude": {
"type": "typesafe",
"baseUrl": "http://127.0.0.1:8790/v1/systemone",
"model": "mude",
"apiKeyEnv": "MUDE_KEY"
}
},
"tiers": ["mude"]
}What stays on your machine
With a fallback (the default)
The judge you used before stays on as mude's fallback. It answers what mude can't (when mude's server isn't running or mude is unsure) and always handles the two injection screens: tool descriptions and tool output. When that judge is hosted, what goes to it leaves your machine.
mu judge mude installLocal only
mude is the only judge, and nothing goes to a hosted judge. When mude can't answer, the decision point does what it would do without a judge.
mu judge mude enable --local-onlymude 1.0 and Jev
| mude 1.0 | Jev | |
|---|---|---|
| Where it runs | On your machine, at 127.0.0.1 | Hosted by TypeSafe, reached through TypeSafe, OpenRouter, the Vercel AI Gateway, OpenCode Zen or Cloudflare Workers AI |
| What leaves your machine | Nothing, with Local only on. Otherwise, what goes to the fallback judge | The fields each question needs, such as a message, a chunk of output or a command. Credentials are masked first |
| Platforms | One-click install on Macs with Apple silicon. Elsewhere, the full model on your own server | Wherever mu runs |
| License and availability | MIT. Both editions are on Hugging Face | A hosted service: free with no key on OpenCode Zen for a limited time, or paid per call with your own key |
| Setup | mu judge mude install, or one click in the desktop app | None, it's the default. mu setup sets a key |