import { type RunComparisonChange } from "./compare.js";
export declare const COMPATIBILITY_HISTORY_SCHEMA: "psbt-lab.compatibility-history/0.1";
export type CompatibilitySignalDirection = "regression" | "improvement" | "neutral";
export type CompatibilityTransitionClassification = "unchanged" | "regression" | "improvement" | "mixed" | "changed";
export interface CompatibilityHistoryRun {
    readonly runId: string;
    readonly completedAt: string;
    readonly outcome: "passed" | "failed";
    readonly verifiedCheckpoints: number;
}
export interface DirectedCompatibilityChange {
    readonly direction: CompatibilitySignalDirection;
    readonly change: RunComparisonChange;
}
export interface CompatibilityHistoryTransition {
    readonly baseRunId: string;
    readonly headRunId: string;
    readonly classification: CompatibilityTransitionClassification;
    readonly signals: {
        readonly regressions: number;
        readonly improvements: number;
        readonly neutral: number;
    };
    readonly changes: readonly DirectedCompatibilityChange[];
}
export interface CompatibilityHistoryReport {
    readonly schema: typeof COMPATIBILITY_HISTORY_SCHEMA;
    readonly runs: readonly CompatibilityHistoryRun[];
    readonly transitions: readonly CompatibilityHistoryTransition[];
    readonly summary: {
        readonly runs: number;
        readonly transitions: number;
        readonly unchanged: number;
        readonly regressions: number;
        readonly improvements: number;
        readonly mixed: number;
        readonly changed: number;
    };
}
export declare function classifyCompatibilityChange(change: RunComparisonChange): CompatibilitySignalDirection;
export declare function buildCompatibilityHistory(directories: readonly string[]): Promise<CompatibilityHistoryReport>;
export declare function historyHasLatestRegression(report: CompatibilityHistoryReport): boolean;
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