What is Jevvie, in one sentence?

It is the small companion character in the corner of chriswijnia.com, after Office's assistant: a visitor asks for something, Jev picks the page action that matches as one typed Choice, and the character hops to the button and performs it.

How does the page expose its actions to Jev?

Each page offers its actions as WebMCP tools. Jev does not receive a chat transcript; it receives the tool list and returns a typed choice over it, along with the argument values, so the action space stays closed.

What does the repository package contain?

packages/jevvie holds the choices, a three.js voxel character, and a 1-bit vgpu trail, while the host site supplies its tools, tips, copy, and colours; packages/jev is a small Jev client shared with other cwdx projects.

Can other agents use the same actions?

Yes. Because the actions are published as WebMCP tools, agents in the browser can drive the same actions over WebMCP, sharing one tool surface with the in-page companion.

Where can I read the site's own integration code?

The site's Vue component and its registry of actions are published, as they run, at chriswijnia.com/lab/jevvie/source, separate from this mirror repository's packages.

How do I run and test the packages locally?

npm install, then npm test for the packages' unit tests, which make no Jev calls, and npm run typecheck for the types. Both run without API access, so the deterministic choice plumbing is verifiable offline.

Why is this repository a mirror?

It is copied from the site's monorepo on every change there, so pull requests are read but applied upstream. The canonical development happens alongside the site rather than in this repository.

Jev directory

CommunityJev Demos & Experiments

Jevvie (browser companion)

A website companion's code: a page's actions are offered as WebMCP tools, a visitor's request becomes one Jev Choice, and a three.js voxel character hops to the button and does it.

See highlights Open github.com

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

cwdx/jevvie

User repository on GitHub

View on GitHub

Jevvie: a small website companion. A page's actions as WebMCP tools, a visitor's request as one Jev Choice, a voxel character that does it.

Forks: 1
Last pushed: Updated Oct 2026

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

Tagscommunity catalog-import cobanov yibie webmcp

Works forJev for Tool calling Jev for Decision gating

Used inJev for Software & DevTools Jev for Media & Entertainment

Languages: TypeScript
Platforms: Browser
Capabilities: Open source

Highlights

Each page action is exposed as a WebMCP tool, and Jev turns a visitor's request into one of them, one typed Choice at a time.
Separate choices cover which action a request means, which value of its argument, whether a tip fits, and when to ask back.
A three.js voxel character and a 1-bit vgpu trail animate the result; the site brings its own tools, tips, copy, and colours.
Agents in the browser can drive the same actions over WebMCP, so the companion and browser agents share one tool surface.
The Jev client package prefers the Vercel AI Gateway, falls back to TypeSafe directly, checks answers, and reports cost.

Quickstart

bash

npm install
npm test          # the packages' unit tests (no Jev calls)
npm run typecheck

Watch out

Copy reviewed against the repo README on 2026-10-15. The repository is a mirror of the chriswijnia.com monorepo, the host site's own component code is published at chriswijnia.com/lab/jevvie/source, and no pricing or benchmark figures are published.

Questions about this entry

Short answers drawn from the linked project or page.

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Original write-ups on what this entry is for.

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