/** Only pending one-shot controls live here; no history, identity or model cache. */
export declare class DtcState {
    private readonly sessions;
    private blockedReason;
    requestFold(sessionID: string): boolean;
    consumeFold(sessionID: string): boolean;
    armCompactionSkip(sessionID: string): void;
    consumeCompactionSkip(sessionID: string): boolean;
    clearCompactionSkip(sessionID: string): void;
    dropSession(sessionID: string): void;
    projectionBlockReason(): "compaction-guard-capacity" | undefined;
    stats(): {
        sessions: number;
        blockedReason: "compaction-guard-capacity" | undefined;
    };
    private mark;
    private consume;
}
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