How to Safely Access Static Constants Across Multiple TypeScript Classes

Managing fixed configuration values like API endpoints or permission masks across multiple classes appears straightforward initially but can introduce serious architectural problems as systems scale. Key issues include loss of type safety when passing classes into generic functions, polymorphism failures where subclasses may silently omit required static properties, and confusion between instance and class-level metadata access. TypeScript does not natively allow static readonly properties to be enforced through standard interfaces, leaving room for runtime errors that are hard to detect. A recommended solution involves defining a constructor interface that explicitly requires the static constant and using a centralized, strongly typed registry to validate all classes at compile time. This approach ensures the TypeScript compiler catches missing constants before the application boots, improving reliability in large-scale systems.