The global logger

A tour of Go's standard library slog package focusing on the default (global) logger. The top-level functions like slog.Info, slog.Debug, etc. are simply aliases to methods on the default logger. While slog.SetDefault lets you replace the default logger and simultaneously updates the legacy log package's logger, the author advises against relying on the global logger at all — because any imported library can modify it, making it unreliable and introducing side effects that complicate testing and architecture.