From the video · 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. Your code computes the market state every tick, Jev answers six typed questions in one call, your thresholds turn the answers into an action, hard risk limits can veto anything, and a fallback ladder keeps it safe when the model is late or down. 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. A recorded twenty seconds of the loop on BTC/USD: your code reads the book, Jev answers six typed questions through Vercel AI Gateway in about 400 milliseconds, your thresholds pick the action, 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, full screen is the only way 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 · 281 KB · Paper money by default

The prompt

Complete the form to unlock it.

What you need

Claude Code
The prompt is written for it. Any plan that runs it works.
An Alpaca paper account
The loop trades paper money there. No live keys go anywhere near it.
A Jev key
From Vercel AI Gateway or TypeSafe. Until you add one the loop runs on a labelled mock client, so the build cannot fail on a missing key.

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AI quant trading system walkthroughTuesday 22 September 2026
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The Jev loop from the video.

Get the prompt.

The one-shot prompt

What you need

See it built live, then build yours.