arktype

Patterns for composing discriminated unions with arktype's .merge() and .or() methods.

Use when you have shared base fields and per-variant payloads discriminated on a literal key. .merge() distributes over unions — it merges the base into each branch of the union automatically.

| Base is a real Type | Reusable, composable, inspectable at runtime | | .merge() distributes | No need to repeat base.merge(...) per variant | | type.or() is flat | All variants in one list — easy to read and add to | | Base appears once | DRY — change base fields in one place | | Auto-discrimination | No manual discriminant config needed |

Patrones de tipo Ark para uniones discriminadas usando .merge() y .or(), sintaxis de clave extendida y composición de tipos. Úselo al crear tipos de unión, combinar esquemas base con variantes o definir esquemas de comando/evento con arktype. Fuente: epicenterhq/epicenter.