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The Claude Agent SDK transforms AI agents from proof-of-concept toys into production systems. This guide covers the architecture, MCP integration patterns, and real-world deployment strategies that separate working agents from robust ones.

Production-ready TypeScript patterns that enforce API type safety from endpoint to UI. Runtime validation, discriminated unions, and type guards that catch errors before deployment.

Most TypeScript decorators fail in production because teams copy patterns without understanding the 5.0+ execution model. Here's how to build decorators that solve real problems.