Do I need two model accounts to run this?

Yes. Jev requests bill to your TypeSafe account, and the text or vision model bills to whichever provider you connect. The MIT-licensed source ships no credits, and setup validation performs real inference, so a saved CLI login does not by itself establish quota or model access.

Is this just a browser-use wrapper around a chat model?

The split is explicit. A text or vision model plans and interprets, Jev chooses among a finite set of actions the browser has actually observed, and deterministic code validates and dispatches. The README also states plainly that structured output is an interface guarantee, not proof the task succeeded.

Why did my first run fail with a connection error?

Check three things from the troubleshooting table. A Jev failure is usually the wrong API, meaning a TypeSafe key against the System One endpoint rather than Chat Completions. A local CLI that will not connect needs its own authentication flow completed, and a failing visual task usually means the chosen provider does not accept image input.

How much should I trust the demo videos and scores?

Treat them as recorded evidence rather than a benchmark. The clips are an uninterrupted excerpt from a single run against an earlier interface, and the README keeps them separate from a distinct instrumented latency study whose figures are not given there. Website support also varies.

How do I install and run it from source?

Install Git and Node.js 22.12 or newer, then git clone the repo, npm ci, and npm run dev to open the Electron desktop app. npm run dev:web previews only the interface; browser control requires the desktop app. Build with npm run build and npm start, or package:mac and package:win for unsigned developer packages.

What are the action choices Jev picks from?

The page's observed controls become typed choices such as CLICK:17, TYPE_TEXT:4, SCROLL_DOWN, DONE, and BLOCKED, which code resolves to application-owned operations. Jev's output never becomes arbitrary JavaScript, a generated selector, or a shell command, though a valid choice can still be the wrong one.

What is the recommended first task?

The first-success guide suggests opening a small public page, asking one page-grounded question, and comparing the answer with the visible page, then moving to a documentation-navigation task. Keep the page visible and follow the action feed, and press Stop or Escape from page focus to cancel.

CommunityJev Demos & Experiments

Jevry

Electron desktop browser where Jev picks the next executable action from a page's observed controls while a separate text model plans; deterministic code builds the action space, validates responses, dispatches input and keeps receipts.

See highlights

Open github.com

Stars: 123
Language: TypeScript
License: MIT
Published by: Community
Author: michaelswissa
Last verified: Oct 2026

michaelswissa/jevry

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Your browser. Ready to act. An MIT-licensed desktop browser agent for website tasks, cited research, and supported games.

Forks: 3
Last pushed: Updated Oct 2026

Repo stats from the GitHub API, cached Oct 2026.

About this project

Give your browser a task. Watch it work. Browse, research, and work through supported websites in plain language. Jevry is an open-source desktop browser with visible actions, page-grounded results, and controls to stop or redirect the task. ▶ Watch the full Jevry introduction · 72 seconds. Lightweight introduction excerpt · 8 seconds, 955 KiB · Media provenance. Install · Demo · Why Jev? · Architecture · Benchmarks · Contribute.

Quoted from the project's README. Read the full README.

Tagscommunity jevbest

Works forJev for Classification Jev for Routing

Used inJev for Software & DevTools

Languages: TypeScript

Highlights

Actions are typed choices such as CLICK:17, TYPE_TEXT:4, SCROLL_DOWN, DONE and BLOCKED, resolved to application-owned operations.
Jev output never becomes JavaScript, a generated selector or a shell command, so a bad answer cannot turn into code execution.
Deterministic code constructs the action space, checks page freshness, retains receipts and enforces the stop conditions.
Needs Node 22.12 or newer, a TypeSafe key for Jev and a separate text or vision provider, so two billable connections are involved.

Watch out

It is a source preview on a beta tag, and signed installers, notarization and automatic updates are listed as future work; packaged builds are unsigned developer packages and the public release ships source plus demo assets. Real-provider experience is described as primarily on macOS. Website support varies by site, the demo clips were recorded against an earlier interface and are separate from an instrumented latency study whose numbers are not published there. You supply and pay for both model connections. Copy reviewed against the repository README on 2026-10-04, not from running it.

Questions about this entry

Short answers drawn from the linked project or page.

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