export declare const LOOP_FILE_SENTINEL = "<<loop.md>>";
export declare const LOOP_FILE_DYNAMIC_SENTINEL = "<<loop.md-dynamic>>";
export declare const AUTONOMOUS_LOOP_SENTINEL = "<<autonomous-loop>>";
export declare const AUTONOMOUS_LOOP_DYNAMIC_SENTINEL = "<<autonomous-loop-dynamic>>";
export declare const isSentinel: (s: string) => boolean;
/**
 * Per-instance sentinel cache. host 版为模块全局 Map/Set；SDK 版实例化以隔离多个 CronScheduler。
 * key = sessionID + workspaceRoot。
 */
export declare class SentinelCache {
    private readonly lastLoopFileContent;
    private readonly autonomousDelivered;
    /** Compaction drops the prompt prefix, so the next fire must re-send full content. */
    clear(sessionID?: string): void;
    /** 供 resolveAtFireTime 使用的内部访问。 */
    _getLoopFile(key: string): string | undefined;
    _setLoopFile(key: string, content: string): void;
    _hasAutonomous(key: string): boolean;
    _addAutonomous(key: string): void;
}
/**
 * Pure function called by the scheduler at fire time (not at task-create time).
 * Non-sentinel strings pass through unchanged. Sentinels expand to full content
 * on first fire and short reminders on subsequent fires, preserving the prefix
 * cache when loop.md is unchanged.
 *
 * @param cache 每个 CronScheduler 实例持有自己的 SentinelCache；host 可传单例以兼容旧行为。
 */
export declare const resolveAtFireTime: (stored: string, workspaceRoot: string, cache: SentinelCache, sessionID?: string) => Promise<string>;
/**
 * 兼容 host 的 resetOnCompaction 语义。host compaction 钩子调用此函数清缓存。
 * 传 cache 则清该 cache；不传 cache 可在外部自行管理。
 */
export declare const clearSentinelCache: (cache: SentinelCache, sessionID?: string) => void;