@sentry/core is bundling some MCP/AI code

[kien-ngo]

What React Native libraries do you use?

Expo Router

Are you using sentry.io or on-premise?

sentry.io (SaS)

@sentry/react-native SDK Version

~7.11.0

How does your development environment look like?

System:
  OS: macOS 15.7.3
  CPU: (11) arm64 Apple M3 Pro
  Memory: 533.33 MB / 18.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 25.6.0
    path: /opt/homebrew/bin/node
  Yarn: Not Found
  npm:
    version: 11.8.0
    path: /opt/homebrew/bin/npm
  Watchman: Not Found
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 25.2
      - iOS 26.2
      - macOS 26.2
      - tvOS 26.2
      - visionOS 26.2
      - watchOS 26.2
  Android SDK:
    API Levels:
      - "35"
      - "36"
    Build Tools:
      - 35.0.0
      - 36.0.0
      - 36.1.0
    System Images:
      - android-35 | Google Play Tablet ARM 64 v8a
      - android-36.1 | Google Play ARM 64 v8a
      - android-36 | Google Play ARM 64 v8a
    Android NDK: Not Found
IDEs:
  Android Studio: 2025.2 AI-252.28238.7.2523.14688667
  Xcode:
    version: 26.2/17C52
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 21.0.8
    path: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 20.1.1
    wanted: ^20.1.1
  react:
    installed: 19.2.0
    wanted: 19.2.0
  react-native:
    installed: 0.83.1
    wanted: 0.83.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

Sentry.init()

init({
  dsn: ENVS.SENTRY_DSN,
  environment: ENVS.ENVIRONMENT,
  dist: Constants.expoConfig?.version,
  tracesSampleRate: 0.8,
  integrations: [
    httpContextIntegration(),
    reactNativeTracingIntegration(),
  ],
});

Steps to Reproduce

Here's my metro config:

const { getSentryExpoConfig } = require('@sentry/react-native/metro');
const { withUniwindConfig } = require('uniwind/metro');

const config = getSentryExpoConfig(__dirname, {
  includeWebReplay: false,
});

module.exports = withUniwindConfig(config, {
  cssEntryFile: './global.css',
  dtsFile: './uniwind-types.d.ts',
});

Then just build the project.

Expected Result

Maybe im ignorant but I don't think we should have those code in the final bundle? I know for a fact that I'm not using any AI feature from sentry.

Actual Result

AI/MCP related code probably taking over 150kb

[linear]

RN-483

[alwx]

Hello @kien-ngo and thanks for reporting!
We will make sure to take a look at this issue soon and come back to you.