/**
 * defineBinding — creates a route model binding resolver.
 */
/** The resolver function — receives the path param value, returns the entity or null. */
export type BindingResolver<T> = (id: string) => Promise<T | null>;
/** A route model binding produced by defineBinding(). */
export interface BindingDefinition<T = unknown> {
    readonly _brand: 'BindingDefinition';
    readonly resolve: BindingResolver<T>;
}
/**
 * Defines a route model binding.
 */
export declare function defineBinding<T>(resolve: BindingResolver<T>): BindingDefinition<T>;
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