MCP Selection Lab for VS Code

io.github.changhuliu/mcp-selection-lab

Benchmark MCP tool selection with metadata-only routing, collision, abstention, and holdout checks.

client:VS Code transport:streamable-http tools:3

Install MCP Selection Lab in VS Code

.vscode/mcp.json

{
  "servers": {
    "mcp-selection-lab": {
      "type": "http",
      "url": "https://mcp-selection-lab-production.up.railway.app/mcp"
    }
  }
}

Requires agent mode. MCP: Open User Configuration puts the same block in every workspace. VS Code docs