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TypeScript 6.0's isolatedDeclarations replaces the type checker bottleneck in .d.ts generation, enabling parallel builds and sub-second declaration emit in monorepos.

Most type safety failures in TypeScript stem from treating all strings as interchangeable. Branded types prevent these errors at compile time without runtime overhead.

TypeScript's using keyword and explicit resource management eliminate the most common source of production memory leaks. Learn the patterns that matter.