Clean Code: Interfaces in Go - Why Small Is Beautiful [Part 3]

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Master Go interfaces: why single-method interfaces rule, accept interfaces return structs, and the nil interface gotcha that crashes production. From 6 years of
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Go's single-method interfaces are the norm, not the exception. In Go, a type satisfies an interface automatically, without explicit declaration. The single method rule is the difference between code that fights language and code that flows like water.