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Node.js 24's native TypeScript support eliminates the build step for production deployments. Understand the runtime type stripping mechanism, performance implications, and when to migrate from traditional build pipelines.

The isolatedDeclarations flag unlocks parallel declaration emit but breaks type inference. Here's what library authors must change and why the performance gains matter for monorepos.

The engineering playbook for migrating production TypeScript codebases to TS 6.0 strict defaults—without breaking your build or losing velocity.