ref(core): Tree-shake spanStreamingIntegration when tracing is disabled

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: Lms24

packages/browser/src/sdk.ts

@@ -25,6 +25,8 @@ import { makeFetchTransport } from './transports/fetch';
 import { normalizeStringifyValue } from './normalizeStringifyValue';
 import { checkAndWarnIfIsEmbeddedBrowserExtension } from './utils/detectBrowserExtension';
 
+declare const __SENTRY_TRACING__: boolean;
+
 /** Get the default integrations for the browser SDK. */
 export function getDefaultIntegrations(_options: Options): Integration[] {
   /**
@@ -116,7 +118,11 @@ export function init(options: BrowserOptions = {}): Client | undefined {
     defaultIntegrations,
   });
 
-  if (options.traceLifecycle !== 'static' && !integrations.some(integration => integration.name === 'SpanStreaming')) {
+  if (
+    (typeof __SENTRY_TRACING__ === 'undefined' || __SENTRY_TRACING__) &&
+    options.traceLifecycle !== 'static' &&
+    !integrations.some(integration => integration.name === 'SpanStreaming')
+  ) {
     integrations.push(spanStreamingIntegration());
   }
 

packages/core/src/server-runtime-client.ts

@@ -25,6 +25,8 @@ export interface ServerRuntimeClientOptions extends ClientOptions<BaseTransportO
   serverName?: string;
 }
 
+declare const __SENTRY_TRACING__: boolean;
+
 /**
  * The Sentry Server Runtime Client SDK.
  */
@@ -43,7 +45,11 @@ export class ServerRuntimeClient<
     // When span streaming is enabled (`traceLifecycle: 'stream'`), the `spanStreamingIntegration`
     // is required to flush spans. We add it here so the individual server SDKs don't have to.
     // A user-provided `spanStreamingIntegration` always takes precedence over the one we add.
-    if (options.traceLifecycle !== 'static' && !options.integrations.some(i => i.name === 'SpanStreaming')) {
+    if (
+      (typeof __SENTRY_TRACING__ === 'undefined' || __SENTRY_TRACING__) &&
+      options.traceLifecycle !== 'static' &&
+      !options.integrations.some(i => i.name === 'SpanStreaming')
+    ) {
       options.integrations.push(spanStreamingIntegration());
     }