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An easy way to use jev with your coding agent for tool calling reasoning
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- Last pushed
- Updated Oct 2026
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Jev Gateway — vinilana
A local gateway for coding agents that asks Jev which tool to call each turn and steers the LLM when Jev is confident, while every other request goes to your usual provider untouched.
- Stars
- 319
- Language
- TypeScript
- License
- MIT
- Reading time
- 3 min
- Published by
- Community
- Author
- vinilana
- Last verified
- Sep 2026
About this project
A local LLM gateway for coding agents. When your agent is about to decide which tool to call, the gateway asks Jev, TypeSafe's fast decision model, instead of leaving that choice to the expensive reasoning model. Everything else goes to your usual LLM untouched. It works with Codex, Claude Code, OpenCode and Kilo out of the box, including on ChatGPT and claude.ai subscriptions, with Gemini API clients, and with any client that speaks the OpenAI, Anthropic or Google Gemini APIs.
Quoted from the project's README. Read the full README.
Used inJev for Software & DevTools
Highlights
- Launchers jev-codex, jev-claude, jev-opencode, and jev-gemini pass arguments through and work with subscription logins as well as API keys.
- When Jev is down, slow, or the key is wrong, every request goes straight to the LLM; the gateway never fails a request.
- Jev keys can come from TypeSafe, OpenRouter, or Vercel AI Gateway; the first launcher asks once and stores the choice in ~/.jev-gateway/.env.
- A dashboard at localhost:8790 shows routing status, Jev latency, confidence, cost, and LLM token counts; baseline mode compares with routing off.
- Listens on 127.0.0.1 only, leaves ~/.codex, ~/.claude, and ~/.config/opencode unchanged, and defaults to ports 8790, 8789, 8791, and 8788.
Quickstart
bash
npm install -g jev-gateway
jev-codex --dashboardWatch out
MIT-licensed and not affiliated with TypeSafe. Needs Node.js 22.15+ and a Jev key; only sessions started through the jev- commands are routed.
Questions about this entry
Short answers drawn from the linked project or page.
No. Only sessions you start with the jev- commands are routed; plain codex, claude, opencode, and kilo behave as before, and nothing in ~/.codex, ~/.claude, ~/.config/opencode, or ~/.config/kilo is changed. The launchers set the base URL for the child process and reuse your saved login, so a subscription keeps working.
Every request goes straight to the LLM; the gateway never makes a request fail. The dashboard shows a Jev is failing state and explains in plain English why a given request was not routed. If a rewritten request is rejected, the gateway resends the original, so your agent never sees an error the gateway caused.
Less, and for documented API reasons. Claude Code runs with extended thinking, which makes the Anthropic API reject a forced tool, and changing tool_choice would invalidate its cached conversation. For that client the gateway appends a short suggestion to the request instead of forcing the tool, so the effect is weaker.
The dashboard shows only request metadata: prompts, tool arguments, and credentials never reach it. The only comparison it offers is routing on versus routing off, which is meaningful only if you do similar work in both states. There is no published benchmark, and the README notes the OpenRouter and Vercel paths have not been exercised with real keys.
Run npm install -g jev-gateway on Node.js 22.15 or newer. The first launcher asks where you want to reach Jev and for the key, checks it with one real call, and saves it to ~/.jev-gateway/.env readable only by you, shared across every jev- command.
TypeSafe with jev-latest, OpenRouter with typesafe/jev-1.13, Vercel AI Gateway with typesafe-ai/jev, and OpenCode with jev-1.13-free, free for a limited time, or the paid jev-1.13. All four take the same questions and return the same answers, so the choice is whose account and billing you want.
Codex uses 8790, Claude Code 8789, OpenCode 8791, Gemini clients 8788, Devin 8792 and Kilo 8793. Each is overridable with a JEV_*_PORT environment variable such as JEV_CODEX_PORT or JEV_CLAUDE_PORT.
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.
X: Jev 1.14 is now on OpenRouter
X: Decision outputs in Grep
Other listings of this project
Forks and copies of this project in the directory. This entry is the canonical one.
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