There are too many JavaScript schema libraries, so support only one

JavaScript developers face an overwhelming variety of schema libraries, such as Zod, Valibot, ArkType, and others, which complicates the decision-making process for library authors who need to support user-defined schemas. The introduction of Standard Schema offers a solution by providing a single compatibility interface that many popular schema libraries already implement, allowing developers to support multiple libraries without the need for specific adapters. This approach does not introduce a new schema language or require learning new syntax; instead, it allows existing schema libraries to validate unknown input and recover input/output types. Standard Schema focuses on runtime validation and static type inference, leaving error formatting, metadata, and other aspects to be handled by the specific libraries. It simplifies the integration process within the TypeScript SDK environment by standardizing validation interactions across different schema libraries, thereby reducing the friction for users and library maintainers alike.