import type { SqliteConnection } from '../sqlite-connection.js';
import type { CandidateRecord, CandidateStore } from './candidate-store.js';
export declare class SqliteCandidateStore implements CandidateStore {
    private readonly connection;
    constructor(connection: SqliteConnection);
    getCandidatesByTaskId(taskId: string): Promise<CandidateRecord[]>;
    getCandidate(candidateId: string): Promise<CandidateRecord | null>;
    updateCandidateStatus(candidateId: string, patch: {
        status: CandidateRecord['status'];
    }): Promise<boolean>;
    transitionCandidateStatus(candidateId: string, expectedStatus: CandidateRecord['status'], newStatus: CandidateRecord['status']): Promise<boolean>;
}
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