import { type ManagedHeadDescriptor } from "./managed-head-protocol.js";
export interface ClientHeadManager {
    update(owner: object, anchor: Element | null, descriptors: readonly ManagedHeadDescriptor[]): void;
    deactivate(owner: object): void;
    retire(): void;
}
export declare function getManagedHeadNonce(targetDocument: Document): string | undefined;
export declare function getClientHeadManager(targetDocument: Document): ClientHeadManager;
/** Explicitly hand document-head authority to a non-React route renderer. */
export declare function retireClientHeadOwnership(targetDocument: Document): void;
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