import type { ElicitationRecord, ElicitationResultRecord } from './elicitation.interface';
/**
 * Storage backend for URL-mode elicitations. Implementations may use memory
 * (default), Redis, a database, or any other backing store. All methods are
 * async to support remote stores.
 */
export interface IElicitationStore {
    storeElicitation(elicitation: ElicitationRecord): Promise<void>;
    getElicitation(elicitationId: string): Promise<ElicitationRecord | undefined>;
    updateElicitation(elicitationId: string, updates: Partial<ElicitationRecord>): Promise<void>;
    storeResult(result: ElicitationResultRecord): Promise<void>;
    getResult(elicitationId: string): Promise<ElicitationResultRecord | undefined>;
    /**
     * Find the most recent completed result for a `(userId, type)` pair where
     * `type` is sourced from `metadata.type` on the originating record.
     */
    findResultByUserAndType(userId: string, type: string): Promise<ElicitationResultRecord | undefined>;
    removeElicitation(elicitationId: string): Promise<void>;
    getElicitationsBySession(sessionId: string): Promise<ElicitationRecord[]>;
    /** Returns the number of records purged. */
    cleanupExpired(): Promise<number>;
}
export declare const ELICITATION_STORE_TOKEN: unique symbol;
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