@lucid-softworks/schema-union

Schemas for ordinary unions, discriminated unions, intersections, nullable values, and lazy recursive definitions.

import {
  discriminatedUnionSchema,
  nullableSchema,
  unionSchema,
} from "@lucid-softworks/schema-union";

const identifier = unionSchema([stringSchema(), numberSchema()]);
const maybeName = nullableSchema(stringSchema());
const event = discriminatedUnionSchema("type", {
  created: createdEventSchema,
  deleted: deletedEventSchema,
});

Ordinary union failures are deliberately compact. Discriminated unions report the discriminator path directly, while intersections preserve issues from both sides.