@tsimpl/validation

Standard Schema types for tsimpl and friends.

Use this when you want a stable shape for validators that can power runtime tagging and interop across libraries like Zod or Joi.

Why use it

• Shared schema contract (~standard) across tools.
• Pure TypeScript types, no runtime requirements.
• Works with @tsimpl/runtime for struct tagging.

Quick example

import type { StandardSchemaV1 } from "@tsimpl/validation";

type Input = { id: string };

type Output = { id: string; ok: true };

const schema: StandardSchemaV1<Input, Output> = {
  "~standard": {
    version: 1,
    vendor: "example",
    validate(value) {
      if (value && typeof value === "object" && "id" in value) {
        return { value: { id: String((value as Input).id), ok: true } };
      }
      return { issues: [{ message: "Expected Input." }] };
    }
  }
};

Pair this schema with struct.name("Thing").define(schema) from @tsimpl/runtime to tag and validate values at runtime.