Anthropic message stream events unhandled #17734

Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/browser

SDK Version

10.13.0

Framework Version

NodeJS 20.19.0

Link to Sentry event

No response

Reproduction Example/SDK Setup

Sentry.init({
      dsn: Config.SENTRY_DSN,
      integrations: [
        // Add the OpenAI integration
        Sentry.openAIIntegration({
          recordInputs: true,
          recordOutputs: true,
        }),
        Sentry.anthropicAIIntegration({
          recordInputs: true,
          recordOutputs: true,
        })
      ],
      tracesSampleRate: sampleRate,
      profilesSampleRate: sampleRate,
      environment: environmentName
    })

Steps to Reproduce

1. Install @sentry/node v10.7.0 or later
2. Initialize Anthropic
3. Call anthropic.messages.stream() with streaming parameters using .on() event handlers

import Anthropic from '@anthropic-ai/sdk';

const client = new Anthropic();

const stream = await client.messages.stream(streamParams)
          .on('streamEvent', (messageStreamEvent, snapshot) => {
            // Handle streamEvent
          })

Expected Result

Call succeeds and sends message to Anthropic, while listening for streamEvent type.

Actual Result

Error thrown with message:

TypeError: this.anthropic.messages.stream(...).on is not a function

Additional Context

Event handlers (i.e. .on()) are consistent with Anthropic's docs on streaming messages using their Node SDK.

This worked fine in @sentry/node v10.6.0 but has been broken since v10.7.0. It may be related to this PR: #17460

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