import type { ResolvedConfig } from "../types.js";
import type { Signal } from "./signals.js";
export interface Watermark {
    /** When an improve last ran to completion (any recorded action). */
    lastImproveAt: string | null;
    /** What it did, for the page and the summaries. */
    lastAction: string | null;
    /** Signal key -> when it was first shown to an improve pass. */
    seen: Record<string, string>;
}
export declare function seenPath(resolved: ResolvedConfig): string;
export declare function loadWatermark(resolved: ResolvedConfig): Promise<Watermark>;
/** The signals no improve pass has been shown yet. */
export declare function newSignals(mark: Watermark, signals: Signal[]): Signal[];
/** Stamp every shown signal seen, and the pass itself done. */
export declare function stampSeen(resolved: ResolvedConfig, mark: Watermark, shown: Signal[], action: string): Promise<void>;