What is this Jev demo?

A customer-service chatbot routed by Jev, published by minghanminghan. Each turn goes through a decision tree of support questions, with Jev answering the tree instead of a generative model.

How does the routing work?

One API call per turn: the bot does not walk the tree one call at a time. Jev answers every question in a call in parallel, so the bot asks every level up front and throws away the answers it did not need — the docs' speculative fan-out.

What else rides along in the call?

A Noul asking whether the person wants a human and a Score for frustration. Either can hand off before the walk starts, and so does low confidence at any level.

How fast is a three-level answer?

One round trip, per the README, because all levels are answered in the same parallel call rather than one call per level. The README does not publish latency numbers.

How do I run it locally?

npm install, then npm run dev. The repository is TypeScript, and a deployed copy is linked at jev-demo-mu.vercel.app.

Does it need an API key?

Yes — the bot routes by calling Jev, which requires TypeSafe API access. The README does not document the key setup step; it only shows the two run commands.

What are the limits of the documentation?

The README is short: it explains the speculative fan-out idea and the run commands, but there is no licence declared, no architecture detail, and no evaluation of how well the routing works. Only what is captured above is grounded.

Jev directory

CommunityJev Demos & Experiments

Jev demo (customer-service chatbot)

A customer-service chatbot routed by Jev: one API call per turn asks every question in the decision tree up front and discards the unneeded answers — the docs' speculative fan-out — with a human-handoff Noul and a frustration Score riding along.

See highlights Open github.com

Stars: 0
Language: TypeScript
Reading time: 2 min
Published by: Community
Author: minghanminghan
Last verified: Oct 2026

minghanminghan/jev-demo

User repository on GitHub

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Forks: 0
Last pushed: Updated Sep 2026

Repo stats from the GitHub API, cached Oct 2026.Homepage

Tagscommunity catalog-import logicrw chatbot routing customer-support

Works forJev for Routing Jev for Scoring Jev for Decision gating

Used inJev for Customer Support

Languages: TypeScript
Platforms: Vercel AI Gateway
Capabilities: Open sourceRequires API key

Highlights

One API call per turn: the bot asks every question in the tree up front and discards the answers it did not need, using the docs' speculative fan-out.
A three-level answer needs one round trip, not a walk with one call per level.
A Noul for 'does this person want a human?' and a Score for frustration ride along in the same call.
Either can hand off before the walk starts, and so does low confidence at any level.
Run it with npm install and npm run dev; the live demo is at jev-demo-mu.vercel.app.

Quickstart

bash

npm install
npm run dev

Watch out

Grounded in the full (short) README and GitHub metadata read on 2026-10-15. The README documents the idea and two commands only — there is no licence, no test or cost detail, and no measured accuracy for the routing.

Questions about this entry

Short answers drawn from the linked project or page.

Reactions & coverage

Posts, threads, and videos about this entry from around the web.

Facebook: Intake Router keeps diagnosis out of the answer space at the front desk.

FacebookClinicnotes

X: OpenRouter Decision Model Rankings

X: herdr + jev, an agent router

X: A group chat bot with decision room routing

From the Jev guides

Original write-ups on what this entry is for.

Jev in Customer Support: Triage, Routing, and Escalation

Oct 12, 2026

Support is a long chain of small judgments over text. Triage category and urgency separately, route with a confidence gate, decompose hard tickets, and decide the action in code.

Jev Practices & Patterns#customer-support#routing#triage

Read article

Per-Tick Decisions in Games

Sep 28, 2026

A game tick is a state plus a legal action list. How Clash Royale, Minecraft, and the earlier Mario, Pokémon, StarCraft, and drone loops ask Jev one step at a time.

Jev Demos & Experiments#gaming#agents#control