Domain Predicates Skill

Generate complete sets of predicates and Order instances for domain types, derived from typeclass implementations.

Pattern: Equality with Schema.Data

When using schemas, leverage Schema.Data for automatic structural equality:

import { Schema, Equal, DateTime } from "effect"

export const Task = Schema.TaggedStruct("pending", {
  id: Schema.String,
  createdAt: Schema.DateTimeUtcFromSelf,
}).pipe(Schema.Data) // Implements Equal.Symbol automatically

export type Task = Schema.Schema.Type<typeof Task>

declare const makeTask: (props: { id: string; createdAt: DateTime.Utc }) => Task