/** Reserved batch id for the session capsule (matches the channel path pattern). */
export declare const SESSION_CAPSULE_BATCH_ID = "session-capsule";
/** Reserved key inside that channel. */
export declare const SESSION_CAPSULE_KEY = "orchestrator.capsule";
export interface SessionCapsuleRef {
    readonly batchId: string;
    readonly key: string;
    /** Byte size of the published value (for the pointer line). */
    readonly bytes: number;
    /** ISO8601 timestamp of the last write. */
    readonly updatedAt: string;
}
/**
 * Read the session capsule, if one was published. Returns `null` when the
 * channel is absent, empty, or unreadable — the dispatch prompt then
 * renders neither the pointer nor the precedence line (byte-identical to
 * the pre-slice shape).
 */
export declare function readSessionCapsule(opts: {
    projectRoot: string;
    sid: string;
    rid: string;
}): SessionCapsuleRef | null;