WIP: Cloudflare Worker deployment setup

instrumentation.ts

@@ -1,7 +1,15 @@
-import { LangfuseSpanProcessor } from "@langfuse/otel"
-import { NodeTracerProvider } from "@opentelemetry/sdk-trace-node"
-
 export function register() {
+    // Skip on edge/worker runtime (Cloudflare Workers, Vercel Edge)
+    // OpenTelemetry Node SDK requires Node.js-specific APIs
+    if (
+        typeof process === "undefined" ||
+        !process.versions?.node ||
+        // @ts-expect-error - EdgeRuntime is a global in edge environments
+        typeof EdgeRuntime !== "undefined"
+    ) {
+        return
+    }
+
     // Skip telemetry if Langfuse env vars are not configured
     if (!process.env.LANGFUSE_PUBLIC_KEY || !process.env.LANGFUSE_SECRET_KEY) {
         console.warn(
@@ -10,12 +18,16 @@ export function register() {
         return
     }
 
+    // Dynamic imports to avoid bundling Node.js-specific modules in edge builds
+    const { LangfuseSpanProcessor } = require("@langfuse/otel")
+    const { NodeTracerProvider } = require("@opentelemetry/sdk-trace-node")
+
     const langfuseSpanProcessor = new LangfuseSpanProcessor({
         publicKey: process.env.LANGFUSE_PUBLIC_KEY,
         secretKey: process.env.LANGFUSE_SECRET_KEY,
         baseUrl: process.env.LANGFUSE_BASEURL,
         // Filter out Next.js HTTP request spans so AI SDK spans become root traces
-        shouldExportSpan: ({ otelSpan }) => {
+        shouldExportSpan: ({ otelSpan }: { otelSpan: { name: string } }) => {
             const spanName = otelSpan.name
             // Skip Next.js HTTP infrastructure spans
             if (