import type { ApplyDirection, ApplyReport, FileChange, FileChangeOutcome, FileOps } from "./types.js";
export declare function applySnapshot(snap: {
    changes: FileChange[];
}, direction: ApplyDirection, ops: FileOps): Promise<ApplyReport>;
export declare function mergeReports(reports: ApplyReport[]): ApplyReport;
/**
 * Apply a whole navigation (undo segment reversed, redo segment applied) and
 * return one merged report. Line counts for modified files are recomputed as
 * the precise net change across the whole navigation: they diff the starting
 * content (the file's state when the navigation began) against the ending
 * content, so lines edited in several turns are counted exactly once.
 */
export declare function applyNavigation(undo: {
    changes: FileChange[];
}[], redo: {
    changes: FileChange[];
}[], ops: FileOps): Promise<ApplyReport>;
export declare function reportToText(report: ApplyReport): string;
export declare function describeOutcome(f: FileChangeOutcome): string;