I've built an open-source workflow builder for Jev! Experiment using a UI—classify inputs using choices, scores, booleans; wire results into other prompts; and return a set of custom outputs. Below I've set up a support system that can help with various queries. Features ↓

Each workflow exposes a REST API which you can call in your own code. Here's a cURL example in the terminal!

Check through previous runs, see what happened, and run them again with your updated nodes.

And of course it's a multiplayer editor! It uses the @xyflowdev package for @liveblocks, which automatically syncs React Flow state between multiple users.

Here's the repo!

Tech stack for the builder is… ✦ @typesafeai ✦ @liveblocks ✦ @xyflowdev ✦ @vercel

A visual builder for classify/score/boolean wiring is the right abstraction level here—most people don't need code for a decision this structured. Worth testing against a messier real ticket queue.

This is so good! Making Jev composable like this makes the whole idea click much faster.

This is sick!

Thank you!

Very sad it’s not called “jevflow”

When you rerun an old Jev workflow after changing nodes, does it replay the original workflow snapshot or the current graph? That versioning boundary seems important once workflows are called through the REST API.

This really looks great, and I'll use it as inspiration for a design like this in my own repo 🥳

A visual builder for branching decisions is a good way to make the judge inspectable. The useful next step is node-level traces: what input, what score, what branch fired, and why it didn’t abstain. If I can’t replay a path, the graph is just a nicer UI.

So prompt engineering became a flowchart. Give it a week and I

This is amazing Chris,

Thank you sir!

this makes setting up complex prompt chains look incredibly simple

Crazy 🔥🔥🔥

🤷🏻‍♂️👀👀

that shits fire Chris!!

Super nice! Love seeing this

It looks incredible 🤩

@FredrikTibbling @DavidKPiano « workflow builder »

Seeing a multiplayer, REST exposed workflow for Jev feels like the missing glue between prompts and production

the ability to classify inputs with choices and scores seems powerful for automation

Jev8n

🔥💚

what's the most interesting query you've set up in your support system?

This looks super cool! I am also building my second product around the similar idea but for different use case!

looks awesome!

Incredible

has github for this ??

very cool !

This reminds me of Vellum… but appears not to suck. 😎

nice work, the visual wiring feels spot on for prompt chains

Looks fantastic! I'll try it

Can it play doom?