Go Best Practices Type-First Development Types define the contract before implementation. Follow this workflow: 1. Define data structures - structs and interfaces first 2. Define function signatures - parameters, return types, and error conditions 3. Implement to satisfy types - let the compiler guide completeness 4. Validate at boundaries - check inputs where data enters the system Make Illegal States Unrepresentable Use Go's type system to prevent invalid states at compile time. Structs for domain models: Custom types for domain primitives: Interfaces for behavior contracts: Enums with iota…