How to use Jev to build a 24/7 trading system · Lewis Jackson

The Jev loop from the video.

Paste one prompt into Claude Code and it builds a 24/7 decision loop on your laptop. Jev answers six typed questions each tick, your thresholds pick the action and hard risk limits can veto anything. Runs on Alpaca paper money.

Paper money by default. No charge for the prompt. Claude usage and a Jev key are separate.

This is what the prompt builds. Twenty recorded seconds of the loop on BTC/USD. Jev answers through Vercel AI Gateway in about 400 milliseconds, and the block that misses its deadline is held rather than guessed. Dry run, so it quotes and places nothing. The paper balance does not move, and no figure here says what anyone would make. On a phone, go full screen to read the panels.

jev-hft-system.md · the only thing you paste

The one-shot prompt

# Install the jev-loop Claude Code skill

> **Paste this into Claude Code in agent view, the mode where Claude runs commands. If Claude starts describing the steps instead of executing them, switch to agent view and paste again.**
>
> The onboarding agent installs a 24/7 trading loop as a Claude Code skill at `~/.claude/skills/jev-loop/`. It scaffolds a deterministic state engine, a seven-question judgment battery against Jev (the Vercel AI Gateway is the normal route to it, no waitlist), a strategy layer and risk layer that live entirely in your own code, and Alpaca execution on any crypto pair or US equity ticker you choose. After install you can ask Claude, in any session, to run the loop, calibrate it, explain the split, or open its dashboard. Mac, Windows, and Linux all supported. Paper trading by default, everywhere: going live needs a deliberately awkward three-part opt-in documen
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One file · 306 KB · Paper money by default

The prompt

Fill in the form to unlock it.

What you need

Claude Code
Any plan that runs it.
An Alpaca paper account
The loop trades paper money there. No live keys go near it.
A Jev key
From Vercel AI Gateway or TypeSafe. Until you add one, the loop runs on a labelled mock client.

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The 7-day build path, a monthly live call, support when the install sticks, a trading buddy and the monthly strategy competition.

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The Jev loop from the video.

Get the prompt.

The one-shot prompt

What you need

Build it with people doing the same.