/** After this with no refresh, a waiter stops trusting the marker. */
export declare const CHANNEL_GONE_MS = 120000;
/** The state folder the message hook and the waiter already share. */
export declare function channelStateDir(): string;
/**
 * Say which session this process belongs to, keyed by the processes above it.
 *
 * The hook is the only thing that ever learns the session id — Claude Code puts
 * it in the hook payload — and it runs in a sibling process of the MCP server,
 * so a file is the only thing they can share. Keyed by the parent pid because
 * that is what both processes have in common: their own `claude`.
 */
export declare function recordSessionForPids(sessionId: string, pids: readonly number[]): void;
/** The session id the hook recorded for one of the processes above us. */
export declare function sessionIdFromPids(pids: readonly number[]): string | null;
/**
 * Forget the records of processes that are gone.
 *
 * One file per session, and nothing else would ever remove them: the hook is
 * the only writer and it writes only for its own session.
 */
export declare function pruneSessionPids(): void;
/**
 * Claim delivery for this session, so the waiter stops competing for it.
 *
 * Two consumers of the same lease would each deliver a message: the loser is
 * only spared a duplicate while the winner's lease holds. The marker is how the
 * waiter knows which of them owns the session.
 */
export declare function markChannelAlive(sessionId: string): void;
/** Remove the claim, so the waiter takes over again on the next turn. */
export declare function clearChannelAlive(sessionId: string): void;
/** Whether a live channel is delivering for this session right now. */
export declare function channelOwnsSession(sessionId: string, now?: number): boolean;
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