import type { Trajectory } from "./types.js";
/** Build an empty trajectory metrics block. Used by the planner's
 *  `summarize()` to synthesize metrics for failed trials that produced
 *  no trajectory. */
export declare function emptyMetrics(): Trajectory["metrics"];
/** Collect trajectory events during execution and compute metrics. */
export declare function computeMetrics(events: Trajectory["events"]): Trajectory["metrics"];
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