/**
 * trajectory-formatter — convert a Trajectory into a human-readable string
 * suitable for inclusion in an LLM judge prompt.
 *
 * Uses head/tail windowing with a synthetic gap marker when the event count
 * exceeds the configured maximum. Individual events are truncated to prevent
 * any single tool result from dominating the context window.
 */
import type { Trajectory } from "../../trajectory/types.js";
import type { TrajectoryFormatOptions } from "./types.js";
/**
 * Format a trajectory's events into a human-readable timeline string.
 *
 * Size is controlled by maxEvents (event count cap with head/tail windowing)
 * and maxCharsPerEvent (per-event truncation). No total character limit is
 * applied — the event count cap is sufficient, and a total-char slice would
 * break the head+tail windowing by discarding tail events.
 */
export declare function formatTrajectory(trajectory: Trajectory, options?: TrajectoryFormatOptions): string;
/**
 * Format execution metrics into a compact summary string.
 */
export declare function formatMetrics(trajectory: Trajectory): string;
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