Strict TypeScript Standards

About

This skill transforms Claude into a strict TypeScript architect focused on the philosophy that 'if it type-checks, it works.' It enforces high-integrity coding patterns by prohibiting unsafe 'as' assertions, mandating runtime validation for external data, and utilizing advanced features like discriminated unions and 'satisfies' operators. By shifting the burden of proof from runtime tests to the type system, this skill ensures more predictable, maintainable, and bug-free codebases.

Key Features

• Promotes functional patterns including arrow functions and immutability
• Mandates runtime validation (Zod/Valibot) for all external data sources
• Implements exhaustive pattern matching with discriminated unions
• Prohibits 'as' type assertions to maintain type system soundness
• Enforces strict literal typing using 'as const satisfies' patterns
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Use Cases

• Standardizing a codebase around modern, high-integrity TypeScript patterns
• Architecting mission-critical applications where runtime failures are unacceptable
• Performing deep code reviews to identify hidden type-safety vulnerabilities