export type BackendRecoveryCommand = "renew" | "close" | "recover" | "retry-callback";
export declare function isBackendTaskWatchId(value: unknown): value is string;
export declare function normalizeBackendStatusTarget(params: Record<string, unknown>): Record<string, unknown>;
/** Backend maintenance is anchored to one persisted task, never the thread's current task. */
export declare function backendRecoveryTarget(params: Record<string, unknown>, command: BackendRecoveryCommand): string | undefined;
export declare function backendRecoveryToolArgs(command: BackendRecoveryCommand, params: Record<string, unknown>, context: {
    sessionKey?: unknown;
}, options?: {
    storeDir?: string;
    codexHome?: string;
    defaultMinutes?: number;
}): string[] | undefined;
/** Run before conversation routing, which must never reinterpret a backend recovery target. */
export declare function assertBackendRecoveryCliTarget(command: string | undefined, options: Record<string, unknown>): void;
/** Report observed delivery state without turning a retry attempt into a delivery receipt. */
export declare function formatBackendRecoveryCommandResult(result: unknown, command: BackendRecoveryCommand): string | undefined;