{
  "context": "This criteria evaluates how well the engineer uses @opentelemetry/instrumentation-express in conjunction with @opentelemetry/instrumentation-http to capture distributed traces from an Express application. The focus is on proper setup of both instrumentations and ensuring they work together to enrich HTTP spans with Express-specific route information.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "HTTP Instrumentation Setup",
      "description": "Uses @opentelemetry/instrumentation-http's HttpInstrumentation class to enable HTTP request tracing. This is required for Express instrumentation to work properly as it relies on HTTP instrumentation for base request/response tracing.",
      "max_score": 25
    },
    {
      "name": "Express Instrumentation Setup",
      "description": "Uses @opentelemetry/instrumentation-express's ExpressInstrumentation class to enable Express-specific tracing for middleware and routes.",
      "max_score": 25
    },
    {
      "name": "Instrumentation Registration",
      "description": "Registers both HttpInstrumentation and ExpressInstrumentation with the OpenTelemetry SDK (e.g., using NodeSDK's instrumentations configuration or registerInstrumentations). Both instrumentations must be registered before the Express app is created.",
      "max_score": 20
    },
    {
      "name": "Span Exporter Configuration",
      "description": "Configures an in-memory span exporter (InMemorySpanExporter from @opentelemetry/sdk-trace-base) with a span processor (SimpleSpanProcessor or BatchSpanProcessor) to capture trace data for testing purposes.",
      "max_score": 15
    },
    {
      "name": "Route Tracing Verification",
      "description": "Implementation allows verification that traces include Express route information (http.route attribute) for parameterized routes like /users/:id, demonstrating that Express instrumentation successfully enriches HTTP spans.",
      "max_score": 15
    }
  ]
}