User repository on GitHub
The jev mod: $.jev for Claude Code, typed judgments from TypeSafe Jev.
- Forks
- 0
- Last pushed
- Updated Oct 2026
Repo stats from the GitHub API, cached Oct 2026.
Jev directory
CommunityJev Integrations & Adapters
Jev Mod
A Claude Code mod that adds $.jev to the engine so other mods can ask TypeSafe Jev typed Choice, Score and Noul questions and get calibrated probabilities back. Answers are validated against their questions, keys are kept in the keychain, and calls time out at 4 seconds by default.
- Stars
- 0
- Language
- TypeScript
- License
- MIT
- Reading time
- 3 min
- Published by
- Community
- Author
- gecm0
- Last verified
- Oct 2026
- Languages
- TypeScript
- Platforms
- CLI
- Capabilities
- Open sourceRequires API key
Highlights
- Other mods call $.jev.ask with a state object and typed questions, then read calibrated probabilities like answers.destructive.noul > 0.9.
- TypeSafe API only; per-call timeout defaults to 4 s and caps at 9 s, and a timed-out request is abandoned rather than cancelled, per the README.
- Every answer is checked against its question before it is returned, and errors carry the HTTP status and a hint but never the response body.
- Needs Claude Code v2.1.287 or later; install with /plugin install jev --marketplace gecm0/jev-mod.
- Set the key through /plugin Configure options, kept in the keychain, or export TYPESAFE_API_KEY; TYPESAFE_MODEL overrides the default jev-latest.
Quickstart
ts
const { answers } = await $.jev.ask({
state: { command: e.command },
questions: {
destructive: {
type: 'noul',
instructions: 'The command deletes files that cannot be reproduced.',
criteria: { true: 'Removes source or data.', false: 'Removes build output.' },
},
},
timeoutMs: 1500,
})Watch out
Grounded in the full repository README and GitHub metadata reviewed on 2026-10-15; the contract lives in types/index.d.ts and the README shows only a single Noul example, and it states no pricing beyond describing calls to the TypeSafe API.
Questions about this entry
Short answers drawn from the linked project or page.
It is a Claude Code mod that adds $.jev to the engine, so any mod seated above it can ask TypeSafe's Jev typed Choice, Score and Noul questions over one state and get calibrated probabilities back instead of generated text.
You need Claude Code v2.1.287 or later. Inside a session run /plugin install jev --marketplace gecm0/jev-mod. The README shows a single install command and mentions no configuration file.
Set it in /plugin under Installed, jev, Configure options, where it is kept in the keychain, or export TYPESAFE_API_KEY in the shell that starts claude. TYPESAFE_MODEL overrides the model, which defaults to jev-latest, and the same variables are read by the author's jev-judge-mcp.
The README says the timeout per call is 4 seconds by default and 9 seconds at most, and that a timed-out request is abandoned rather than cancelled. The README example passes timeoutMs: 1500. Error messages carry the HTTP status and a hint, never the response body.
Nothing is sent until a mod calls $.jev.ask. Each call sends the state and questions that mod passes plus the model id, and only to api.typesafe.ai, per the README's Data section.
Yes; that is the point. A mod that lists jev under dependencies gets the types from types/index.d.ts laid into its own types folder. For development, claude --plugin-dir . loads from disk and hot-reloads, claude plugin validate . checks the plugin, and claude plugin test . runs offline with a fake fetch and no key.
It is not a general model gateway: the README says it talks to the TypeSafe API only, at https://api.typesafe.ai/v1/systemone, and answers are checked against their questions before being returned. The README shows one Noul example, so other question shapes should be checked against the contract file.
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.
More Jev resources like this
A Claude Code mod that adds $.jev to the engine interface, letting plugin hooks ask Jev for Choice, Score and Noul answers over one state via TypeSafe, OpenRouter, Vercel, Cloudflare, LiteLLM or a custom endpoint.
Jev Integrations & Adapters#community#catalog-import#logicrw
Community
chrishan17/claude-jev-modTypeScript
chrishan17/claude-jev-modTypeScriptAn OpenCode V2 plugin that asks TypeSafe Jev whether a prompt is deterministic before the LLM reasons, injecting a JEV PRE-ANALYSIS block and temperature 0 for deterministic turns so simple prompts skip chain-of-thought. Jev failures fail open and the session continues normally.
Jev Integrations & Adapters#community#catalog-import#yibie
An OpenCode plugin that keeps the session on a cheap sticky parent model so the cache stays warm, and asks Jev whether a turn is hard before escalating through jev_escalate to temporary stronger subagents.
Jev Integrations & Adapters#community#catalog-import#cobanov
Local tool-routing classifier for coding agents: a gateway and MCP tool that ask Jev which tool to call next, keep your agent's own model and login, and log every decision so you can start by observing.
Jev Integrations & Adapters#community#catalog-import#logicrw
Community
felpsdev/jev-classifierTypeScript
felpsdev/jev-classifierTypeScriptA Claude Code plugin that adds five Jev tools — jev_choice, jev_noul, jev_score, jev_ask and jev_doctor — so small decisions like safety checks, tool choices and review verdicts come back as typed answers with calibrated confidence, labelled auto or escalate.
Jev Integrations & Adapters#community#catalog-import#logicrw
Community
darwintechlab/claude-jevJavaScript
darwintechlab/claude-jevJavaScriptA context engine for OpenClaw that asks Jev which tool calls and results a session still needs, drops the rest and never summarizes: what stays is the original text, while one request scores dozens of calls in about a second.
Jev Integrations & Adapters#community#catalog-import#logicrw
From the Jev guides
Original write-ups on what this entry is for.
From the Jev AI model community
Posts from builders shipping with Jev right now.