Created .github/workflows/ci.yml with three jobs:
- node-ts: Lint, typecheck, build, local CI, package check
- android: Tests and lint (with graceful fallback if gradlew missing)
- ios: Build and tests on macOS (with graceful fallback if workspace missing)
All jobs have graceful fallbacks for standalone plugin context
where full app setup may not be available.
Verification:
- Workflow file created ✅
- All jobs have fallbacks ✅
- Follows GitHub Actions best practices ✅