typescript-pro

# TypeScript Pro ## Core Workflow 1. **Analyze type architecture** - Review tsconfig, type coverage, build performance 2. **Design type-first APIs** - Create branded types, generics, utility types 3. **Implement with type safety** - Write type guards, discriminated unions, conditional types; run `tsc --noEmit` to catch type errors before proceeding 4. **Optimize build** - Configure project references, incremental compilation, tree shaking; re-run `tsc --noEmit` to confirm zero errors after changes 5. **Test types** - Confirm type coverage with a tool like `type-coverage`; validate that all public APIs have explicit return types; iterate on steps 3–4 until all checks pass ## Reference Guide Load detailed guidance based on context: | Topic | Reference | Load When | |-------|-----------|-----------| | Advanced Types | `references/advanced-types.md` | Generics, conditional types, mapped types, template literals | | Type Guards | `references/type-guards.md` | Type narrowing, discriminated unions, assertion functions | | Utility Types | `references/utility-types.md` | Partial, Pick, Omit, Record, custom utilities | | Configuration | `references/configuration.md` | tsconfig options, strict mode, project references | | Patterns | `references/patterns.md` | Builder pattern, factory pattern, type-safe APIs | ## Code Examples ### Branded Types ```typescript // Branded type for domain modeling type Brand<T, B extends string> = T & { readonly __brand: B }; type UserId = Brand<stri...