TypeScript Best Practices

Production-grade TypeScript development with schema-first design, strict type safety, and immutable patterns.

Core Principles

1. Type Safety at All Boundaries - Runtime validation (schemas) + compile-time safety (TypeScript)
2. Schema-First Development - Define schemas before types, derive types from schemas
3. Immutability - No data mutation, always create new values
4. Explicit Types - No implicit any, strict mode enabled
5. Behavior over implementation - Focus on contracts and outcomes

Quick Reference