zod

Schema validation best practices for TypeScript with 43 prioritized rules across type safety, parsing, and error handling. Comprehensive schema validation guide for Zod in TypeScript applications. Contains 43 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation. Reference these guidelines when: Read individual reference files for detailed explanations and code examples: For the complete guide with all rules expanded: AGENTS.md - Covers 8 rule categories from schema definition and parsing (CRITICAL) through type inference, error handling, and performance (LOW-MEDIUM) - Distinguishes safeParse() for user input, parseAsync() for async refinements, and parse() for trusted data; emphasizes validation at system boundaries - Provides guidance on z.infer for type inference, z.unknown() over z.any(), discriminated unions, and schema composition patterns - Includes error handling strategies: custom messages, flatten() for forms, path tracking for nested errors, and internationalization support - References individual rule files with code examples and a compiled full guide (AGENTS.md) for detailed explanations - Writing new Zod schemas - Choosing between parse() and safeParse() - Implementing type inference with z.infer - Handling validation errors for user feedback - Composing complex object schemas - Using refinements and transforms -...