Build a production-ready circuit breaker in Go from scratch with closed, open, and half-open states to prevent cascading failures.

Discover a simpler alternative to functional options: method chaining with builder-style configuration that's 76x faster and easier to understand.

Compare three Go option patterns: exposed structs, option constructors, and functional options. Learn when to use each for clean APIs.

Control goroutine concurrency with buffered channels as semaphores. Prevent resource exhaustion with backpressure patterns in Go workers.

Use compile-time interface guards to verify type conformity in Go without runtime overhead. Learn the var _ Interface = (*Type)(nil) pattern.

Master Go 1.21's log/slog package for structured logging with levels, JSON output, and attribute grouping. No third-party libraries needed.