Agent skill

Jev Route

by cobusgreyling in cobusgreyling/Jev

Route with TypeSafe Jev — map Choice plus confidence to act/confirm/human, or pick a coding-agent model tier.

MITAuto-check passedAI & LLM Engineering

Install Jev Route

skills CLI
$ npx skills add cobusgreyling/Jev --skill jev-route -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install cobusgreyling/Jev jev-route --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/cobusgreyling/Jev.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/jev-route .claude/skills/jev-route && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
jev-route
GitHub stars
136
Token cost
~481 tokens
SKILL.md length
182 words
Files
1
Skills in repo
4
Repo updated
First seen
Licence
MIT

At a glance

Route with TypeSafe Jev — map Choice plus confidence to act/confirm/human, or pick a coding-agent model tier.

  • Works in 2 steps: Confidence-gated action → Model-tier routing
  • Confidence routing
  • SKILL.md covers 1. Confidence-gated action and 2. Model-tier routing
  • Calls npx

What it does

Jev Route is an agent skill from cobusgreyling/Jev. Route with TypeSafe Jev — map Choice plus confidence to act/confirm/human, or pick a coding-agent model tier. Use for confidence routing, model routing, cheap vs frontier, loop-jev, or when the user runs /jev-route or npx jev route.

Its SKILL.md is about 480 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in AI & LLM Engineering, covering Model routing and gateways. The repository describes itself as: Unofficial TypeSafe Jev showcase — System One decisions, not chat. The licence is MIT.

When your agent uses it

  • Confidence routing
  • Cheap vs frontier
  • The user runs /jev-route

Example prompts

  • “/jev-route”

Requirements

  • Node.js

Workflow steps

2 steps, taken from the step headings in SKILL.md.

  1. Confidence-gated action
  2. Model-tier routing

What it can do on your machine

Read from SKILL.md and the folder at commit c636087. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • npx

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use npx, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Jev Route loads about 481 tokens when it runs. Until then it costs about 61 tokens; SKILL.md has 182 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~61
When it runs · the whole SKILL.md, loaded when a task matches
~481

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from cobusgreyling/Jev at commit c636087, republished under its MIT licence (© cobusgreyling). 182 words, ~481 tokens.

Download SKILL.mdSave it as .claude/skills/jev-route/SKILL.md (or your agent's skills folder).
name
jev-route
description
Route with TypeSafe Jev — map Choice plus confidence to act/confirm/human, or pick a coding-agent model tier. Use for confidence routing, model routing, cheap vs frontier, loop-jev, or when the user runs /jev-route or `npx jev route`.

Jev routing

Jev returns a distribution. Code picks the lane. Fan-out extra questions in the same call (skills/jev-fanout/SKILL.md). Primitives and auth: skills/jev/SKILL.md.

1. Confidence-gated action

Choice is what. Confidence is whether to trust it.

Defaults in jev_lab/policy.py:

ConfidenceLane
≥ 0.8act
≥ 0.5confirm
elsehuman

Raise the bar for irreversible actions (unlock, spend, delete). Compose Noul urgency and Score frustration after the Choice, in code (ticket_policy). Do not reuse a Noul 0.7 threshold as Choice confidence.

examples/05_confidence_routing.py

2. Model-tier routing

Choice criteria = cheapest tier that can still do the job. Labels in packages/js/src/route.ts:

TierWhen
nanoTypo, format, list, one-line edit
fastL1 triage, classify, changelog
balancedFocused patch, PR comment
frontierAmbiguous multi-file, CI root-cause
reasoningVerifier, security, maker/checker

If confidence < 0.55 and the pick is not nano, this repo falls back to balanced — an uncertain call must not overspend or underpower.

Ask in the same request: difficulty (Score), needs_tools / needs_long_context / needs_maker_checker (Noul). Map the Choice label to a concrete model id in code; do not ask Jev to generate the id as text.

bash
npx jev route --goal "CI has been red for 3 days" --level L2 --json
npx jev turn --goal "Draft daily triage" --level L1 --json

packages/js/src/route.ts · packages/js/src/turn.ts (route + input guard, one call)

© cobusgreyling, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/jev-route of cobusgreyling/Jev.

Open the folder on GitHubat commit c636087

Compare with similar skills

Jev Route next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Jev Route compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Jev Route this skillcobusgreyling/Jev136—~481Automated safety check: PassMIT
Shogun Bloom Configyohey-w/multi-agent-shogun1.4k—~3.1kAutomated safety check: PassMIT
Codemie Analyticscodemie-ai/codemie-code294—~7.5kAutomated safety check: PassApache-2.0
Model Routernidhi-singh02/agent-router112—~1.2kAutomated safety check: PassMIT
Codex Model Routing Teamzjp1997720/codex-model-routing-team158—~736Automated safety check: PassMIT
Add Modelget-convex/convex-evals130—~1.5kAutomated safety check: NotesApache-2.0

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Questions about Jev Route

What does Jev Route do?

Route with TypeSafe Jev — map Choice plus confidence to act/confirm/human, or pick a coding-agent model tier. Jev Route is an agent skill from cobusgreyling/Jev. Route with TypeSafe Jev — map Choice plus confidence to act/confirm/human, or pick a coding-agent model tier.

When should I use Jev Route?

Jev Route fits situations like: confidence routing; cheap vs frontier; the user runs /jev-route.

How do I install Jev Route in Claude Code?

Run `npx skills add cobusgreyling/Jev --skill jev-route -a claude-code`. Or copy the skill folder (skills/jev-route in cobusgreyling/Jev) into .claude/skills/jev-route in your project. Claude Code loads it when a task matches its description.

How do I install Jev Route in Codex?

Run `npx skills add cobusgreyling/Jev --skill jev-route -a codex`. Or copy the skill folder (skills/jev-route in cobusgreyling/Jev) into .agents/skills/jev-route in your project. Codex loads it when a task matches its description.

Can I use Jev Route in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add cobusgreyling/Jev --skill jev-route -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/jev-route, .gemini/skills/jev-route, .github/skills/jev-route and .opencode/skills/jev-route in your project.

What does Jev Route need to run?

Going by SKILL.md and its folder, Jev Route needs the command-line tools its instructions call (npx). Our summary lists: Node.js.

Does Jev Route access the network?

SKILL.md contains no URLs. Its commands use npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Jev Route safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Jev Route use?

Jev Route is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Jev Route use?

About 481 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Jev Route?

Skills that share tags, products or a category with Jev Route: Shogun Bloom Config (yohey-w/multi-agent-shogun, 1.4k stars), Codemie Analytics (codemie-ai/codemie-code, 294 stars), Model Router (nidhi-singh02/agent-router, 112 stars) and Codex Model Routing Team (zjp1997720/codex-model-routing-team, 158 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Jev Route?

cobusgreyling (a GitHub user) maintains it in cobusgreyling/Jev, which has 136 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on September 20, 2026.

Source: cobusgreyling/Jev on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.