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Classification Providers (Jev)

Some OpenChamber features need a quick decision before they act: is this command risky, what kind of task is this prompt, did the user just start real work? A small decision model called Jev (made by TypeSafe) answers those questions. This page shows how to give OpenChamber access to Jev.

Jev never writes code or replies in your chat. It only returns a verdict, and OpenChamber acts on it. OpenChamber waits at most four seconds for an answer.

What uses Jev

FeatureThe question Jev answers
Permissions & safety netShould the agent ask you before running this action?
Auto model routingWhich of your categories does this prompt belong to?
Sessions in workDid you just ask for real work? Does this turn look like the end of it?
Session recap and suggestionIs a recap or a suggested next message worth generating after this turn?

Without a provider, the safety net and Auto are hidden, and sessions move into work only when you move them. Recaps and suggestions still work, just without the filter.

Set it up

Open Settings → Providers → Classification providers and pick where Jev requests go. There are five options.

OpenCode Zen promotion

Free for a limited time, no key needed. OpenCode lets OpenChamber use Jev through OpenCode Zen at no cost while the promotion runs. If you never touched this page, this is what you are already using.

When the promotion ends, the option disappears and OpenChamber switches to one of the keys below if you have one.

OpenCode Zen key

Uses the Zen API key saved in OpenCode, paid from your Zen balance.

  1. Open Settings → Providers and add an API key to the OpenCode Zen provider (see Providers, Models & Agents).
  2. Come back to Classification providers and pick OpenCode Zen key.

Signing in with an OpenCode account is not enough. Zen accepts only an API key for Jev.

OpenRouter key

Uses the OpenRouter API key saved in OpenCode, billed to your OpenRouter account. If you already use OpenRouter models in OpenCode, there’s nothing to set up. A key in the OPENROUTER_API_KEY environment variable works too. If both are there, the key saved in OpenCode wins.

  1. Open Settings → Providers and add an API key to the OpenRouter provider.
  2. Come back to Classification providers and pick OpenRouter key.

Vercel AI Gateway key

Uses the AI Gateway API key saved in OpenCode, billed to your Vercel account. A key in the AI_GATEWAY_API_KEY environment variable works too. If both are there, the key saved in OpenCode wins.

  1. Open Settings → Providers and add an API key to the Vercel AI Gateway provider.
  2. Come back to Classification providers and pick Vercel AI Gateway key.

TypeSafe API key

Your own TypeSafe key and quota.

  1. Get an API key from TypeSafe.
  2. Paste it into the TypeSafe API key field and press Save.

Saving a key also selects it. The key stays on the OpenChamber server in its own file and is never sent to the browser.

The card on Settings → Providers shows Ready once a provider works.

When your pick stops working

If the provider you picked can’t be used (the promotion ended, a key was removed), OpenChamber falls back to the first one that works, your own keys first: TypeSafe key, then OpenRouter, then Vercel AI Gateway, then Zen key, then the promotion. The page tells you which one it uses right now.

If Jev is slow or fails on a single request, nothing breaks. Each feature has a safe answer for that case:

  • The safety net keeps the action waiting for you.
  • Auto sends the prompt to your fallback model.
  • Sessions in work stay as they are.
  • The recap and suggestion are generated as if Jev didn’t exist.

What Jev sees

Jev gets short excerpts of your conversation: your latest message, and for context up to three previous turns, cut down to their first few hundred characters. For the safety net it also gets the action being checked, the way OpenCode describes it: the command the agent wants to run, or the file and the change for an edit. It never gets whole files or images.

Requests go from the OpenChamber server straight to OpenCode Zen, OpenRouter, Vercel AI Gateway or TypeSafe, depending on your pick.

Where it works

Jev runs in the OpenChamber server, so it works in the desktop app, the web app and on your phone connected to either. The VS Code extension talks to OpenCode directly and has no Jev: there’s no safety net, no Auto, and sessions move into work only by hand.