jev-skill-router SKILL.md skillA
jev-skill-router from shimo4228/claude-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add shimo4228/claude-harness/jev-skill-router@git:20261008.b63e5f1Pins git:20261008.b63e5f1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- shimo4228/claude-harness
- Path
skills/jev-skill-router/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261008.b63e5f1, committed Oct 8, 2026
- First version recorded
- Sep 23, 2026
- Size
- 11,176 bytes
- Repository stars
- 3
- License
- MIT
Operating manual for the UserPromptSubmit hook that asks TypeSafe Jev which skill fits the prompt.
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-skill-router
Claude Code lists every installed skill's description and leaves the choice to the model. With
dozens of skills the model reads past the one that fits, or loads one when none does. This hook
makes that choice a separate, typed judgment: the prompt and the skill roster go to TypeSafe's
Jev model, which returns probabilities, and code decides from them. The roster in the model's
context never changes — at most one line is added to the turn.
Python 3.10+, standard library only. The runtime is `scripts/`; nothing else is needed.
## Install
As a plugin (wires the hook for you):
```
/plugin marketplace add shimo4228/jev-skill-router
/plugin install jev-skill-router@jev-skill-router
```
Claude Code asks for the options when it enables the plugin: a TypeSafe API key
(https://console.typesafe.ai/keys — stored in the system keychain, optional if you pass the key
another way), the mode (`shadow` by default; the picker needs Claude Code 2.1.271+), and an
optional log path.
By hand: put this directory anywhere and add one hook to `~/.claude/settings.json`:
```json
{
"env": { "JEV_ROUTER": "shadow" },
"hooks": {
"UserPromptSubmit": [
…Read the whole file at its exact version.
How to install
mdr add shimo4228/claude-harness/jev-skill-router@sha256:61871ee4b0183312The line at the top of this page pins the label git:20261008.b63e5f1, 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.
[](https://markdownregistry.com/a/art_sb3uaehzkbf24acu)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Sep 23, 2026 and Oct 8, 2026, about one every 5 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261008.b63e5f1 latest | 2026-10-08 | b63e5f1 | 11,176 B | A | view · diff |
| git:20261003.f891b77 | 2026-10-03 | f891b77 | 11,477 B | A | view · diff |
| git:20260925.a3765d2 | 2026-09-25 | a3765d2 | 10,949 B | A | view · diff |
| git:20260923.e444d08 | 2026-09-23 | e444d08 | 10,672 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (11176 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
shimo4228/claude-harness · 3 stars · license MIT · pushed 2026-10-18 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_sb3uaehzkbf24acu GET https://markdownregistry.com/api/v1/resolve?ref=shimo4228/claude-harness/jev-skill-router GET https://markdownregistry.com/api/v1/blob/61871ee4b0183312fe4736696606d645c86f16e7142ca884cce12d13fcd91d9f
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.
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