Skill: React Upgrade Layer

React-specific upgrade rules to run when react changes during a React Native or Expo upgrade.

When to Apply

• react version changes (major, minor, or patch).
• React Native target implies a newer React pairing.
• Tests/types break after React upgrade.

React Pairing Rules

1. Keep companion packages aligned with installed React version:
   • react-test-renderer
   • @types/react
   • react-dom (if used by the app)
2. Prefer matching React major and minor exactly; patch should also match when available.
3. Do not leave these packages on older x.y after upgrading react.

React 19 Rules

1. Upgrade @testing-library/react-native to v13+.
2. Follow:
   • Expo React 19 Reference
   • RNTL LLM Docs
3. Expect type-level breakages from deprecated API removals; fix code and mocks accordingly.

Related Skills

• upgrade-helper-core.md - Core RN upgrade workflow
• upgrading-dependencies.md - Dependency compatibility triage
• expo-sdk-upgrade.md - Expo-specific upgrade layer
• upgrade-verification.md - Post-upgrade validation, including agent-device-assisted checks