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Stage 3 decorators bring runtime metadata, validation, and dependency injection patterns to production TypeScript. The performance trade-offs matter more than the syntax sugar.

Five advanced patterns that unlock the full power of TypeScript's satisfies operator—from type-safe configs to branded types that bridge runtime validation.

Node.js 24 stabilizes require(esm), eliminating transpilation for most codebases. See what to delete from your build pipeline, when you still need transpilation, and how to migrate production systems safely.