ego-jev-ultrafast
Single-file, zero-dependency port of jev-ultrafast to Ego Lite: one typed-choice Jev request per browser step, with extra guardrails.
Overview
Jego (ego-jev-ultrafast) lets Jev drive your Ego Lite browser from a plain-language goal, in your real browser window with logged-in sessions. It is a single-file, zero-dependency port of browser-use/jev-ultrafast with multi-model benchmarks and extra guardrails.
A script in the page walks the DOM and builds an indexed action space of visible controls with roles, labels and values. That table goes to Jev in one typed-choice request returning both the operation (click, type, select, wait or done) and target index; no screenshots or second call. The executor re-checks the element with freshness, geometry and hit-test guards and sends raw CDP input events. A small OpenAI-compatible model writes field values only when needed. The README reports median decision times of 0.6 to 1.9 seconds, about 2.5 seconds end to end for a click-only Hacker News task, and about 60 seconds for a ten-step Google Flights search, mostly animation and the helper model.
What the decision model decides
| Type | Question | Answers |
|---|---|---|
| Choice | Which operation on which indexed element should be performed? | CLICK · TYPE_TEXT · SELECT · WAIT · DONE |
How it works
- Build an indexed action table from the DOM
- One Jev typed-choice request returns operation and target
- Executor re-verifies the element and fires CDP input
- Helper model supplies text only for text fields
Strengths
- No screenshots or vision model
- Zero dependencies, single file
- Runs in your real logged-in browser
Caveats
- Unofficial port
- Total time dominated by page animation and text model on long tasks
Getting started
See the README for running the single-file script against Ego Lite with a TypeSafe key and a small OpenAI-compatible model.At a glance
- Type
- Benchmark
- Status
- prototype
- Language
- JavaScript
- Runtime
- Ego Lite browser script
- Has code
- yes
- License
- MIT
Use cases and integrations
How curated lists describe it
Jev drives your Ego Lite browser: one typed-choice request per step. Single-file, zero-dependency port of browser-use/jev-ultrafast with multi-model benchmarks and extra guardrails. Unofficial.
logicrw/awesome-jev-projectsJev drives your Ego Lite browser: one typed-choice request per step. Single-file, zero-dependency port of browser-use/jev-ultrafast with multi-model benchmarks and extra guardrails. Unofficial.
hellogumbo/awesome-jev
Frequently asked questions
How is it different from jev-ultrafast?
It is a zero-dependency single-file port that runs in Ego Lite with extra guardrails.
Does it use screenshots?
No, decisions use an indexed DOM table.
Who writes text input?
A small OpenAI-compatible model, only when a field needs a value.
Related projects
Browser-agent benchmark with five timed events from one prompt, plus a ~200-line DevTools agent where Jev picks each action.
ProjectbetaJavaScriptego-decision-layer: measured, pluggable decision layer for ego lite where Jev picks operation and target in one request.
ProjectbetaTypeScriptPlugs any CDP browser, including engines that never draw a page, into a Jev loop that picks operations and targets from the DOM.
LibrarybetaPythonBrowser automation where Jev picks every step from a sightmap's named actions and reports whether the goal is met.
ProjectbetaGoBrowser agent that acts on one look at the page with one open-model call per action; Jev is an optional chooser backend.
AppprototypePythonOpen Apache-2.0 browser-agent decision model (Qwen3.5-35B-A3B fine-tune) that doubled Jev 1.13's task success in the same agent.
ServiceresearchPython