Replace Any with type-safe protocols, handle array conformance limitations, and future-proof your Swift enums.

Sentry is a platform for monitoring, troubleshooting, and error tracking in software applications. Readers can learn about logging, error handling, and performance monitoring techniques. With documentation, tutorials, and best practices, Sentry helps developers identify and fix issues in their applications, ensuring a seamless user experience.

Sentry Engineering

Deep dive into building a type-safe metrics API in Swift by replacing `Any` with protocol-based union types. Covers implementing `SentryAttributeValue` protocol to constrain attribute values to supported types, navigating Swift compiler limitations with array conformance, handling mixed-type arrays, and using `@unknown default` for forward compatibility. Shows how protocol extensions eliminate boilerplate while maintaining compile-time safety.

Building Type-Safe Metrics API in Swift: Part II