jev-flash-router

Zero-token-output decision router MCP server powered by TypeSafe Jev.

AI coding agents waste hundreds of reasoning tokens just deciding which file to edit, which route to pick, or whether a diff breaks tests. jev-flash-router evaluates context, code diffs, logs, or planning options and returns calibrated probabilities in ~150ms — with $0.00 output token cost.

• ~150ms decisions — Lightning-fast evaluation via OpenRouter Decisions API
• Zero output token cost — output_tokens: 0 on every call
• TypeSafe Jev — Powered by the cutting-edge typesafe/jev-latest model
• MCP-native — Works seamlessly with Cursor, Windsurf, Claude Desktop, and Claude Code
• Zero-config — Run via npx or build locally from source
• Three decision formats — noul (binary), choice (categorical), score (rubric)

Obtain an API key from OpenRouter with access to the Jev model.

{
  "mcpServers": {
    "jev": {
      "command": "npx",
      "args": ["-y", "jev-flash-router"],
      "env": {
        "OPENROUTER_API_KEY": "sk-or-v1-YOUR-ACTUAL-API-KEY"
      }
    }
  }
}

{
  "mcpServers": {
    "jev": {
      "command": "node",
      "args": ["/path/to/jev-flash-router/dist/index.js"],
      "env": {
        "OPENROUTER_API_KEY": "sk-or-v1-YOUR-ACTUAL-API-KEY"
      }
    }
  }
}

To automatically configure your AI agent (Antigravity IDE, Cursor, Claude Code) with the Master Jev Skill so it proactively uses zero-token decisions:

npx -y jev-flash-router install-skill

• Server name: jev
• Executable command: node (or npx)
• Arguments: /path/to/jev-flash-router/dist/index.js (or -y\njev-flash-router)
• Environment: OPENROUTER_API_KEY=sk-or-v1-YOUR-ACTUAL-API-KEY

Go to Settings → Features → MCP Servers → Add New MCP Server:

{
  "mcpServers": {
    "jev": {
      "command": "node",
      "args": ["/path/to/jev-flash-router/dist/index.js"],
      "env": {
        "OPENROUTER_API_KEY": "sk-or-v1-YOUR-ACTUAL-API-KEY"
      }
    }
  }
}

Edit ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "jev": {
      "command": "node",
      "args": ["/path/to/jev-flash-router/dist/index.js"],
      "env": {
        "OPENROUTER_API_KEY": "sk-or-v1-YOUR-ACTUAL-API-KEY"
      }
    }
  }
}

Add to your Windsurf MCP configuration:

{
  "mcpServers": {
    "jev": {
      "command": "node",
      "args": ["/path/to/jev-flash-router/dist/index.js"],
      "env": {
        "OPENROUTER_API_KEY": "sk-or-v1-YOUR-ACTUAL-API-KEY"
      }
    }
  }
}

git clone [https://github.com/Ravinder82/jev-flash-router.git](https://github.com/Ravinder82/jev-flash-router.git)
cd jev-flash-router
npm install
npx tsc --types node && chmod +x dist/index.js

Evaluates context and returns calibrated probabilities.

noul (binary yes/no):

{
  "true": "breaks existing callers",
  "false": "backward compatible"
}

choice (categorical):

{
  "option1": "use caching",
  "option2": "recompute",
  "option3": "defer"
}

score (ordered rubric):

[
  "critical",
  "warning",
  "info"
]

MIT