What is Jev for Claude Code?

An unofficial integration of TypeSafe's Jev into Claude Code, installed by one file on Windows, WSL, Linux or macOS, with hooks for skills, task type, subagent models and shell risk.

How does the skill suggestion hook work?

On UserPromptSubmit, it ranks installed skills against the prompt and suggests one only when it clearly fits, then adds the suggestion to Claude's context.

What task types does it classify?

The same hook classifies the request as a bug fix, feature, review, security or Q&A task and passes the result to Claude as context.

How does the shell risk gate behave?

In full mode, a PreToolUse hook on Bash or PowerShell asks you to confirm commands Jev judges destructive or secret-touching, rather than blocking them silently.

What does the jev-vision tool do?

A CLI and skill that asks yes/no, pick-one or bounding-box questions about PNG and JPEG files, using TypeSafe's experimental TypeSafe-Danger-Zone-Images feature.

Which commands does /jev support?

The README lists on, lite, off, status, test and log [n], giving runtime control, a quick test path and a request log.

What happens without a key or when Jev fails?

The README says it warns once when Jev is unavailable because of a missing key, API error or timeout, and the integration is described as unofficial and not endorsed by TypeSafe.

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CommunityJev Integrations & Adapters

Jev for Claude Code — pachelbel23

An unofficial TypeSafe Jev integration for Claude Code with hooks that suggest skills, classify task type, pick subagent model tiers and gate risky shell commands. It also ships jev-vision for yes/no, pick-one and bounding-box questions about images.

See highlights Open github.com

Stars: 0
Language: JavaScript
License: MIT
Reading time: 2 min
Published by: Community
Author: pachelbel23
Last verified: Oct 2026

pachelbel23/claude-code-jev

User repository on GitHub

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Unofficial TypeSafe Jev integration for Claude Code: skill/task/shell-risk hooks + jev-vision (Images + Box). One-file installer for Windows, WSL, Linux, macOS.

Forks: 0
Last pushed: Updated Oct 2026

Repo stats from the GitHub API, cached Oct 2026.

Tagscommunity github javascript claude-code agent

Works forJev for Routing Jev for Decision gating Jev for Classification

Used inJev for Software & DevTools

Languages: JavaScript
Platforms: CLI macOS
Capabilities: Open sourceRequires API key

Highlights

UserPromptSubmit hook ranks installed skills against each prompt and suggests one only when it clearly fits.
Same hook classifies the task as bug fix, feature, review, security or Q&A and passes it to Claude.
PreToolUse hooks pick the cheapest subagent model tier and confirm commands Jev judges destructive or secret-touching.
/jev supports on, lite, off, status, test <text> and log [n]; jev-vision answers image questions and bounding boxes.
One installer file covers Windows, WSL, Linux and macOS; MIT-licensed with 0 stars.

Watch out

README reviewed 2026-10-17; the captured feature table and command list are visible, but the text cuts off at the fail-open note and the installer itself is not reproduced, so setup and key configuration are not grounded here. Metadata shows 0 stars.

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.

YouTube: Ray Amjad puts Jev inside an agentic coding loop and looks at what it costs to run.

YouTube: RoboNuggets puts Jev to work inside Claude Code.

Reddit: A Claude Code mod replaces the auto-mode classifier with Jev, 2x faster.

Other listings of this project

Forks and copies of this project in the directory. This entry is the canonical one.

Jev for Claude Code

A Claude Code plugin that asks Jev, TypeSafe's System One model, which model tier each prompt needs — haiku, sonnet or opus — and switches automatically, and routes classification, scoring and yes/no judgments to Jev via scripts/jev.py.

Jev Integrations & Adapters#community#github#claude-code

Community

ricky94511/jevTypeScript

From the Jev guides

Original write-ups on what this entry is for.

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From the Jev AI model community

Posts from builders shipping with Jev right now.

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