feat(cloudflare/vercel-edge): Add manual instrumentation for LangGraph

[RulaKhaled]

• ⚠️ This PR depends on feat(core): Instrument LangGraph Agent #18114

This PR adds manual instrumentation support for LangGraph StateGraph operations in Cloudflare Workers and Vercel Edge environments.

import * as Sentry from '@sentry/cloudflare'; // or '@sentry/vercel-edge'
import { StateGraph, START, END, MessagesAnnotation } from '@langchain/langgraph';

// Create and instrument the graph
const graph = new StateGraph(MessagesAnnotation)
  .addNode('agent', agentFn)
  .addEdge(START, 'agent')
  .addEdge('agent', END);

Sentry.instrumentLangGraph(graph, {
  recordInputs: true,
  recordOutputs: true,
});

const compiled = graph.compile({ name: 'weather_assistant' });

await compiled.invoke({
  messages: [{ role: 'user', content: 'What is the weather in SF?' }],
});

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	24.59 kB	-	-
@sentry/browser - with treeshaking flags	23.08 kB	-	-
@sentry/browser (incl. Tracing)	41.22 kB	-	-
@sentry/browser (incl. Tracing, Profiling)	45.5 kB	-	-
@sentry/browser (incl. Tracing, Replay)	79.7 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	69.37 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	84.39 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	96.57 kB	-	-
@sentry/browser (incl. Feedback)	41.27 kB	-	-
@sentry/browser (incl. sendFeedback)	29.26 kB	-	-
@sentry/browser (incl. FeedbackAsync)	34.19 kB	-	-
@sentry/react	26.29 kB	-	-
@sentry/react (incl. Tracing)	43.21 kB	-	-
@sentry/vue	29.07 kB	-	-
@sentry/vue (incl. Tracing)	42.99 kB	-	-
@sentry/svelte	24.61 kB	-	-
CDN Bundle	26.89 kB	-	-
CDN Bundle (incl. Tracing)	41.77 kB	-	-
CDN Bundle (incl. Tracing, Replay)	78.3 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback)	83.77 kB	-	-
CDN Bundle - uncompressed	78.84 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	123.97 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	240 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	252.76 kB	-	-
@sentry/nextjs (client)	45.31 kB	-	-
@sentry/sveltekit (client)	41.61 kB	-	-
@sentry/node-core	50.76 kB	-	-
@sentry/node	158.7 kB	+0.56%	+879 B 🔺
@sentry/node - without tracing	92.64 kB	-	-
@sentry/aws-serverless	106.36 kB	-0.01%	-1 B 🔽

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[github-actions]

node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

Scenario	Requests/s	% of Baseline	Prev. Requests/s	Change %
GET Baseline	8,833	-	11,390	-22%
GET With Sentry	1,414	16%	1,586	-11%
GET With Sentry (error only)	6,144	70%	7,742	-21%
POST Baseline	1,192	-	1,114	+7%
POST With Sentry	482	40%	543	-11%
POST With Sentry (error only)	1,026	86%	1,022	+0%
MYSQL Baseline	3,327	-	3,990	-17%
MYSQL With Sentry	454	14%	524	-13%
MYSQL With Sentry (error only)	2,699	81%	3,218	-16%

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