zod

Zod is a TypeScript-first schema declaration and validation library. Use this skill when defining schemas, validating data, transforming inputs, or working with type-safe APIs.

| z.string() | String validation | z.string().min(1).max(100) | | z.number() | Number validation | z.number().int().positive() | | z.bigint() | BigInt validation | z.bigint().min(0n) | | z.boolean() | Boolean values | z.boolean() | | z.date() | Date objects | z.date().min(new Date()) | | z.symbol() | Symbol values | z.symbol() |

| z.undefined() | Undefined only | z.undefined() | | z.null() | Null only | z.null() | | z.void() | Void type | z.void() | | z.any() | Any type (escape hatch) | z.any() | | z.unknown() | Unknown type (safer) | z.unknown() | | z.never() | Never type | z.never() | | z.nan() | NaN value | z.nan() |