import type { Comment } from '@pantheon-systems/css-client';
/** How long a mentioned agent has to say it is working before the thread says it did not. */
export declare const AGENT_START_MS = 10000;
/**
 * Stands in for each agent the latest comment mentions until that agent speaks for
 * itself. The line reads as working straight away, so the reader who just asked is not
 * left looking at their own comment, and turns into a failure once the agent has had
 * long enough to pick the request up. The moment the agent posts anything, its own row
 * takes the place of the stand-in.
 */
export declare function withPendingAgents(comments: readonly Comment[], now: number): readonly Comment[];
/** When the stand-ins for the latest comment turn from working to failed, if they will. */
export declare function pendingAgentDeadline(comments: readonly Comment[], now: number): number | null;