Structuring TypeScript Projects for Long-Term Maintainability: Architecture, Organisation, and Engineering Decisions

The articles includes: Formal Academic Abstract & Introduction: Establishing the theoretical foundations of software maintainability, type system rigor, and architectural decay in large-scale TypeScript codebases. Advanced Architecture Paradigms: Detailed explorations of Domain-Driven Design (DDD), Feature-Sliced Design (FSD), and strict module boundaries. Advanced Type System Engineering: Advanced TypeScript patterns including branded types, algebraic data types (ADTs), type-safe runtime validation, and nominal vs. structural typing trade-offs. Empirical Evaluations & Case Studies: Quantitative metrics on compilation performance, type-checking overhead across large modules, and real-world micro-frontend migration strategies. Structured Trade-Off Analysis & Recommendations: Comprehensive comparison tables evaluating architectural patterns across scalability, developer velocity, and maintainability dimensions.