import { EventEnvelope, TreeNode } from "./types.js";
import { ViewerThresholds } from "./thresholds.js";
export declare function childEvent(node: TreeNode, type: string): EventEnvelope | undefined;
export declare function childEvents(node: TreeNode, type: string): EventEnvelope[];
export declare function spanDetail(node: TreeNode): string | undefined;
export declare function llmCallDetail(node: TreeNode): string | undefined;
export declare function lastUserMessage(pc: EventEnvelope): string | undefined;
export declare function completionOutcome(pc: EventEnvelope): string | undefined;
/** `1.2s` / `450ms` as the tree has always shown; `{ minutes: true }`
 *  adds the `15m59s` form for the timeline's long spans, where `959.0s`
 *  stops being readable. One formatter, two call styles — never two
 *  formatters. */
export declare function fmtDuration(ms?: number, opts?: {
    minutes?: boolean;
}): string;
export declare function stripQuotes(s?: string): string;
export declare function truncate(text: string, limit: number): string;
export declare function durationColor(ms: number, t: ViewerThresholds): string | undefined;
export declare function costColor(usd: number, thresholds: ViewerThresholds): string | undefined;
export declare function toolArgSummary(args: unknown): string;