From ee4761d18084971dce63731a416b6e0d5c9cd4e5 Mon Sep 17 00:00:00 2001
From: Lukas Stracke <lukas.stracke@sentry.io>
Date: Wed, 29 Jul 2026 14:34:47 +0200
Subject: [PATCH] ref(core): Tree-shake `spanStreamingIntegration` when tracing
 is disabled

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
---
 packages/browser/src/sdk.ts                | 3 +++
 packages/core/src/server-runtime-client.ts | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/packages/browser/src/sdk.ts b/packages/browser/src/sdk.ts
index 84f4940c8b41..4419b800591f 100644
--- a/packages/browser/src/sdk.ts
+++ b/packages/browser/src/sdk.ts
@@ -28,6 +28,8 @@ 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[] {
   /**
@@ -120,6 +122,7 @@ export function init(options: BrowserOptions = {}): Client | undefined {
   });
 
   if (
+    (typeof __SENTRY_TRACING__ === 'undefined' || __SENTRY_TRACING__) &&
     options.traceLifecycle !== 'static' &&
     !integrations.some(integration => integration.name === SPAN_STREAMING_INTEGRATION_NAME)
   ) {
diff --git a/packages/core/src/server-runtime-client.ts b/packages/core/src/server-runtime-client.ts
index e0426e558ed3..159c4aeb3b93 100644
--- a/packages/core/src/server-runtime-client.ts
+++ b/packages/core/src/server-runtime-client.ts
@@ -28,6 +28,8 @@ export interface ServerRuntimeClientOptions extends ClientOptions<BaseTransportO
   serverName?: string;
 }
 
+declare const __SENTRY_TRACING__: boolean;
+
 /**
  * The Sentry Server Runtime Client SDK.
  */
@@ -47,6 +49,7 @@ export class ServerRuntimeClient<
     // 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 (
+      (typeof __SENTRY_TRACING__ === 'undefined' || __SENTRY_TRACING__) &&
       options.traceLifecycle !== 'static' &&
       !options.integrations.some(i => i.name === SPAN_STREAMING_INTEGRATION_NAME)
     ) {