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:

// Define the data model first
type User struct {