Install mumo in VS Code.

Install the mumo extension

From the Visual Studio Marketplace listing, or directly inside VS Code via the Extensions panel — search mumo and click Install.

Or, with the code CLI in your shell:

code --install-extension mumo.mumo-vscode

Requires VS Code 1.101 or later.

Follow the walkthrough

On first install, VS Code auto-opens a Get started with mumo walkthrough. Three clicks: create a key at mumo.chat, paste it via the mumo: Set API Key command, then jump into Copilot Chat.

The key lives in VS Code's native SecretStorage (macOS Keychain, Windows Credential Manager, Linux libsecret). If you ever need to update it, run mumo: Set API Key from the Command Palette, or click the mumo indicator in the status bar.

Closed the walkthrough early? Help → Welcome → Get started with mumo reopens it.

Run your first deliberation

In Copilot Chat (Agent mode), name mumo explicitly the first time so the agent reaches for the panel instead of answering directly.

Ask mumo to compare Postgres and MongoDB for our event store.
Include the constraints from this repo and tell me where the models disagree.

Reliable invocations: “Ask mumo about…”, “Run this by a mumo panel”, “Get me a second opinion from mumo on…”. Vague phrasings like “ask a panel” may resolve to a generic Copilot response — the word mumo is what makes the routing stick.