feat(browser): Expose langgraph instrumentation

Author: nicohrubec

dev-packages/browser-integration-tests/suites/tracing/ai-providers/langgraph/init.js

@@ -0,0 +1,9 @@
+import * as Sentry from '@sentry/browser';
+
+window.Sentry = Sentry;
+
+Sentry.init({
+  dsn: 'https://public@dsn.ingest.sentry.io/1337',
+  tracesSampleRate: 1,
+  debug: true,
+});

dev-packages/browser-integration-tests/suites/tracing/ai-providers/langgraph/mocks.js

@@ -0,0 +1,30 @@
+// Mock LangGraph graph for browser testing
+
+export class MockStateGraph {
+  compile(options = {}) {
+    const compiledGraph = {
+      name: options.name,
+      graph_name: options.name,
+      lc_kwargs: {
+        name: options.name,
+      },
+      builder: {
+        nodes: {},
+      },
+      invoke: async (input) => {
+        const messages = input?.messages;
+        return {
+          messages: [
+            ...messages,
+            {
+              role: 'assistant',
+              content: 'Mock response from LangGraph',
+            },
+          ],
+        };
+      },
+    };
+
+    return compiledGraph;
+  }
+}

dev-packages/browser-integration-tests/suites/tracing/ai-providers/langgraph/subject.js

@@ -0,0 +1,16 @@
+import { MockStateGraph } from './mocks.js';
+import { instrumentLangGraph } from '@sentry/browser';
+
+// Test that manual instrumentation doesn't crash the browser
+// The instrumentation automatically creates spans
+// Test both agent creation and invocation
+
+const graph = new MockStateGraph();
+instrumentLangGraph(graph, { recordInputs: false, recordOutputs: false });
+const compiledGraph = graph.compile({ name: 'mock-graph' });
+
+const response = await compiledGraph.invoke({
+  messages: [{ role: 'user', content: 'What is the capital of France?' }],
+});
+
+console.log('Received response', response);

dev-packages/browser-integration-tests/suites/tracing/ai-providers/langgraph/test.ts

@@ -0,0 +1,30 @@
+import { expect } from '@playwright/test';
+import { sentryTest } from '../../../../utils/fixtures';
+import { envelopeRequestParser, waitForTransactionRequest } from '../../../../utils/helpers';
+
+// These tests are not exhaustive because the instrumentation is
+// already tested in the node integration tests and we merely
+// want to test that the instrumentation does not crash in the browser
+// and that gen_ai transactions are sent.
+
+sentryTest('manual LangGraph instrumentation sends gen_ai transactions', async ({ getLocalTestUrl, page }) => {
+  const transactionPromise = waitForTransactionRequest(page, event => {
+    return !!event.transaction?.includes('mock-graph');
+  });
+
+  const url = await getLocalTestUrl({ testDir: __dirname });
+  await page.goto(url);
+
+  const req = await transactionPromise;
+
+  const eventData = envelopeRequestParser(req);
+
+  // Verify it's a gen_ai transaction
+  expect(eventData.transaction).toBe('create_agent mock-graph');
+  expect(eventData.contexts?.trace?.op).toBe('gen_ai.create_agent');
+  expect(eventData.contexts?.trace?.origin).toBe('auto.ai.langgraph');
+  expect(eventData.contexts?.trace?.data).toMatchObject({
+    'gen_ai.operation.name': 'create_agent',
+    'gen_ai.agent.name': 'mock-graph',
+  });
+});

dev-packages/browser-integration-tests/utils/generatePlugin.ts

@@ -40,6 +40,7 @@ const IMPORTED_INTEGRATION_CDN_BUNDLE_PATHS: Record<string, string> = {
   instrumentAnthropicAiClient: 'instrumentanthropicaiclient',
   instrumentOpenAiClient: 'instrumentopenaiclient',
   instrumentGoogleGenAIClient: 'instrumentgooglegenaiclient',
+  instrumentLangGraph: 'instrumentlanggraph',
   // technically, this is not an integration, but let's add it anyway for simplicity
   makeMultiplexedTransport: 'multiplexedtransport',
 };

packages/browser/rollup.bundle.config.mjs

@@ -16,6 +16,7 @@ const reexportedPluggableIntegrationFiles = [
   'instrumentanthropicaiclient',
   'instrumentopenaiclient',
   'instrumentgooglegenaiclient',
+  'instrumentlanggraph',
 ];
 
 browserPluggableIntegrationFiles.forEach(integrationName => {

packages/browser/src/index.ts

@@ -66,6 +66,7 @@ export {
   instrumentAnthropicAiClient,
   instrumentOpenAiClient,
   instrumentGoogleGenAIClient,
+  instrumentLangGraph,
   logger,
 } from '@sentry/core';
 export type { Span, FeatureFlagsIntegration } from '@sentry/core';

packages/browser/src/integrations-bundle/index.instrumentlanggraph.ts

@@ -0,0 +1 @@
+export { instrumentLangGraph } from '@sentry/core';

packages/browser/src/utils/lazyLoadIntegration.ts

@@ -24,6 +24,7 @@ const LazyLoadableIntegrations = {
   instrumentAnthropicAiClient: 'instrumentanthropicaiclient',
   instrumentOpenAiClient: 'instrumentopenaiclient',
   instrumentGoogleGenAIClient: 'instrumentgooglegenaiclient',
+  instrumentLangGraph: 'instrumentlanggraph',
 } as const;
 
 const WindowWithMaybeIntegration = WINDOW as {