/** Generate a unique agent name. */
export declare function generateAgentName(): string;
/** Mask a secret: show first 4 chars, then ****. */
export declare function maskSecret(value: string | undefined): string;
/** Format a Unix timestamp (seconds) to readable date. Returns "—" for falsy values. */
export declare function formatTimestamp(ts: number | undefined): string;
/** Convert a Unix timestamp to a relative time string. */
export declare function relativeTime(ts: number | undefined): string;
/** Format a duration in seconds to human-readable string. */
export declare function formatDuration(seconds: number): string;
/** Color-code a latency value: green < 1000ms, yellow 1000-2000ms, red > 2000ms. */
export declare function colorLatency(ms: number | undefined): string;
/** Format a role for conversation display. */
export declare function formatRole(role: string): string;
/** Calculate average of an array of numbers, ignoring undefined. */
export declare function averageOf(values: (number | undefined)[]): number;