jev SKILL.md skillA

jev from rashedint32/jev-mcp is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add rashedint32/jev-mcp/jev@git:20260920.ad00bf8

Pins git:20260920.ad00bf8 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
rashedint32/jev-mcp
Path
skills/jev/SKILL.md
Versions recorded
4
Latest version
git:20260920.ad00bf8, committed Sep 20, 2026
First version recorded
Sep 17, 2026
Size
10,164 bytes
Repository stars
7
License
MIT

Get typed, calibrated judgments from the connected `jev` MCP tools when the same semantic decision repeats across many items — triaging files, ranking candidates, checking claims against their sources, scoring a diff against each requirement — or when you need a calibrated number to threshold on. Prefer an ordinary answer for a single judgment in conversation. Not for judgments that ship inside the user's application; those belong in SDK code, not in a tool call.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Jev judgments over MCP

Jev is a System One model. It returns a typed answer and a calibrated probability
distribution, never prose. The `jev` MCP server exposes it as six tools.

This skill covers **when to call those tools and how to shape the call**. For the
underlying theory — primitive semantics, state design, composition patterns — use the
`typesafe-ai` skill or the live docs at <https://docs.typesafe.ai>. Do not duplicate
that material here.

If the `jev_*` tools are not in your tool list, this skill does not apply. Call
`jev_models` to confirm the key works before assuming a failure is your own.

## Three-way test

Decide which of these you are in before calling anything.

**Answer it yourself** when the judgment happens once, in conversation, and you can
explain your reasoning. That is most judgments. An ordinary answer carries an argument
the user can push back on. Jev returns a number and a label, which is weaker in
dialogue. Do not reach for a tool to look rigorous.

**Call the tool** when the same judgment repeats across many items, or when you need a
calibrated number to threshold on. Triaging forty files. Ranking twenty candidates.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add rashedint32/jev-mcp/jev@sha256:d579ac9b3bee5e8c

The line at the top of this page pins the label git:20260920.ad00bf8, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_y4wxs44yam4ctwv2.svg)](https://markdownregistry.com/a/art_y4wxs44yam4ctwv2)

5 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 4 versions of this file, between Sep 17, 2026 and Sep 20, 2026, more than one a day.

versioncommittedcommitsizeaudit
git:20260920.ad00bf8 latest2026-09-20 ad00bf8 10,164 BA view · diff
git:20260917.27603c12026-09-17 27603c1 8,480 BA view · diff
git:20260917.98937772026-09-17 9893777 7,960 BA view · diff
git:20260917.16904892026-09-17 1690489 5,234 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (10164 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

rashedint32/jev-mcp · 7 stars · license MIT · pushed 2026-09-28 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_y4wxs44yam4ctwv2
GET https://markdownregistry.com/api/v1/resolve?ref=rashedint32/jev-mcp/jev
GET https://markdownregistry.com/api/v1/blob/d579ac9b3bee5e8c343969e791d2ab09a3828e20edd206bde37d5b0b48436dfc

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

Other files named jev

jev SKILL.md skill
joetawil7/first-pass · skills/jev/SKILL.md · Sets up, checks or changes the optional Jev judge, the TypeSafe decision model that ship-check asks about review…
git:20260929.5291e17 · audit A · 121 stars
jev SKILL.md skill
francoischastel/jev-code · skills/jev/SKILL.md · Use Jev, TypeSafe's System One classifier, whenever a coding task needs a classifier under the hood: labelling or…
v0.5.0 · audit A · 57 stars
jev SKILL.md skill
pymodel/jev-judge-mcp · src/jev_judge_mcp/skills/jev/SKILL.md · Use when code needs a judgment about natural language that rules or regex cannot make (classify, route, triage…
git:20260927.164b44f · audit A · 47 stars
jev SKILL.md skill
flc1125/skills · skills/jev/SKILL.md · Solve user tasks by dynamically designing and executing workflows that combine code with Jev semantic judgments. Use…
git:20260922.d822388 · audit A · 39 stars
jev SKILL.md skill
ismaildasci/claude-referee · plugins/claude-referee/skills/jev/SKILL.md · Hand small, checkable judgements to TypeSafe Jev through the claude-referee CLI instead of judging them yourself. done…
git:20261015.71bc158 · audit A · 11 stars
jev SKILL.md skill
calebnewtonusc/chewbacca · skills/jev/SKILL.md · Use Chewbacca's Jev integration for cheap typed decisions, semantic skill selection, classification, scoring, and…
git:20260923.d4201c4 · audit A · 9 stars
jev SKILL.md skill
jzkk720/cubecloud-skills-bundle-kit · upstream/jev/SKILL.md · Set up Jev via OpenRouter, native TypeSafe or explicitly chosen simulation; build custom decision integrations and…
git:20260921.ae0b3e2 · audit A · 4 stars
jev SKILL.md skill
lu1sdv/skillsmd · jev/SKILL.md · Use when writing or improving Jev programs — the TypeSafe judgment model behind POST /v1/systemone. Covers primitive…
git:20260922.b382a88 · audit A · 2 stars

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