export interface PromoteResult {
    ok: boolean;
    source?: string;
    dest?: string;
    reason?: string;
}
export interface RollbackResult {
    archived: string[];
    archive_dir: string;
    errors: string[];
}
export declare function listCandidates(): string[];
/**
 * Move one candidate file from lab/candidates/ to me/solutions/ after
 * schema + ownership checks. Refuses to overwrite an existing solution.
 * Returns `{ok:false, reason}` for any precondition failure so the CLI
 * can report exactly why promotion was rejected.
 */
export declare function promoteCandidate(nameOrPath: string): PromoteResult;
/**
 * Archive evolved-* solutions created at-or-after the given epoch ms.
 * Looks in ME_SOLUTIONS first (live, promoted candidates) then in
 * CANDIDATES_DIR (unpromoted). Archive is a timestamp-suffixed
 * directory so concurrent rollbacks don't clobber each other.
 *
 * "evolved" is identified by `source: evolved` in frontmatter; we
 * deliberately do NOT use filename prefix so a manually-renamed
 * evolved solution can still be rolled back.
 */
export declare function rollbackSince(epochMs: number): RollbackResult;