declare const __brand: unique symbol;
/** Phantom brand marker — attaches a nominal tag to a base type. */
export type Brand<B extends string> = {
    readonly [__brand]: B;
};
/** Nominal type — `Branded<string, 'UserId'>` is not assignable to `Branded<string, 'PostId'>`. */
export type Branded<T, B extends string> = T & Brand<B>;
/** Extracts the phantom output type from a FieldDescriptor. */
export type InferFieldOutput<F> = F extends {
    readonly _output?: infer O;
} ? O : unknown;
/** Projects field output types into a readonly record — used for DomainDefinition.Select. */
export type InferSelect<T extends Record<string, {
    readonly _output?: unknown;
}>> = {
    readonly [K in keyof T]: InferFieldOutput<T[K]>;
};
export {};
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