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fix(langgraph): Call instrumentLangGraph before .compile() #16611

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fix(langgraph): Call instrumentLangGraph before .compile() #16611

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e66df13
fix(langgraph): Call instrumentLangGraph before .compile()
priscilawebdev Feb 27, 2026
fa2f446
fix(langgraph): Correct alert to say wrap graph before compiling
priscilawebdev Feb 27, 2026
945aed5
fix(langgraph): Add missing SystemMessage and HumanMessage import
priscilawebdev Feb 27, 2026
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15 changes: 8 additions & 7 deletions docs/platforms/javascript/common/configuration/integrations/langgraph.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,7 @@ supported:

<Alert>

For meta-framework applications using all runtimes, you need to manually wrap your compiled graph with `instrumentLangGraph`. See instructions in the [Browser-Side Usage](#browser-side-usage) section.
For meta-framework applications using all runtimes, you need to manually wrap your graph before compiling with `instrumentLangGraph`. See instructions in the [Browser-Side Usage](#browser-side-usage) section.

</Alert>

Expand All @@ -52,7 +52,7 @@ For meta-framework applications using all runtimes, you need to manually wrap yo

_Import name: `Sentry.langGraphIntegration`_

The `langGraphIntegration` adds instrumentation for [`@langchain/langgraph`](https://www.npmjs.com/package/@langchain/langgraph) to capture spans by automatically wrapping LangGraph operations and recording AI agent interactions including agent invocations, graph executions, and node operations.
The `langGraphIntegration` adds instrumentation for [`@langchain/langgraph`](https://www.npmjs.com/package/@langchain/langgraph) to capture spans by automatically wrapping LangGraph operations and recording AI agent interactions including agent invocations, graph executions, and node operations.

<PlatformSection notSupported={["javascript.bun", "javascript.cloudflare"]}>

Expand Down Expand Up @@ -98,11 +98,12 @@ For Cloudflare Workers, manual instrumentation is required using `instrumentLang

</PlatformSection>

The `instrumentLangGraph` helper adds instrumentation for [`@langchain/langgraph`](https://www.npmjs.com/package/@langchain/langgraph) to capture spans by wrapping a compiled LangGraph graph and recording AI agent interactions with configurable input/output recording. You need to manually wrap your compiled graph with this helper. See example below:
The `instrumentLangGraph` helper adds instrumentation for [`@langchain/langgraph`](https://www.npmjs.com/package/@langchain/langgraph) to capture spans by wrapping a `StateGraph` before compilation and recording AI agent interactions with configurable input/output recording. You need to call this helper on the graph **before** calling `.compile()`. See example below:

```javascript
import { ChatOpenAI } from "@langchain/openai";
import { StateGraph, MessagesAnnotation, START, END } from '@langchain/langgraph';
import { SystemMessage, HumanMessage } from '@langchain/core/messages';

// Create LLM call
const llm = new ChatOpenAI({
Expand All @@ -124,14 +125,14 @@ const agent = new StateGraph(MessagesAnnotation)
.addEdge(START, 'agent')
.addEdge('agent', END);

const graph = agent.compile({ name: 'my_agent' });

// Manually instrument the graph
Sentry.instrumentLangGraph(graph, {
// Instrument the graph before compiling
Sentry.instrumentLangGraph(agent, {
recordInputs: true,
recordOutputs: true,
});

const graph = agent.compile({ name: 'my_agent' });

// Invoke the agent
const result = await graph.invoke({
messages: [
Expand Down
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