/**
 * Readonly applied at the SEAM, never in a wire schema: zod 4 projects
 * `.readonly()` as `readOnly` into the advertised JSON Schema, and the wire
 * is mutable JSON. Types derived from a wire schema wear this instead, so a
 * consumer holding a projection cannot mutate it while the schema still
 * says exactly what travels.
 */
export type DeepReadonly<T> = T extends (infer U)[] ? ReadonlyArray<DeepReadonly<U>> : T extends object ? {
    readonly [K in keyof T]: DeepReadonly<T[K]>;
} : T;
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