Validate types with Zod schemas

Validate TypeScript schemas with Zod for runtime type safety

When needing runtime type checking tied to static types in form data or API payloads.

• · z.object schema definition
• · user input payload

• · parsed typed value or validation errors
• · error path for UI display

• · zod npm package
• · TypeScript

• · TypeScript strict mode enabled
• · safeParse preferred for user input

• · parse() throws on validation error
• · double validation performance hit
• · z.any() loses type info

• · 43 rules organized by priority
• · z.input vs z.infer distinction
• · flatten() for form error display