import type { Run } from "../config/types.js";
import type { RunComparison } from "./types.js";
/** Options for comparing two runs. */
export interface CompareOptions {
    /** Minimum score delta to classify a case as a regression or improvement. Deltas within this threshold are reported as unchanged. @default 0.05 */
    readonly scoreThreshold?: number | undefined;
}
/**
 * Compares two runs and produces a structured comparison.
 *
 * The base run is the "before" (e.g., main branch).
 * The compare run is the "after" (e.g., PR branch).
 *
 * Only cases present in BOTH runs are compared as changed/unchanged.
 * Cases in only one run are reported as "added" or "removed".
 *
 * For multi-trial runs (trialStats present), uses aggregate pass^k
 * semantics and mean scores instead of raw trial-0 data.
 */
export declare function compareRuns(base: Run, compare: Run, options?: CompareOptions): RunComparison;
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