export type Hunk = {
    /** Context + removed lines: what the file must contain for the hunk to apply. */
    before: string[];
    /** Context + added lines: what replaces it. */
    after: string[];
    /** 1-based line the hunk was generated at, used as the first place to look. */
    oldStart: number;
};
export type FilePatch = {
    /** Path relative to the package root. */
    path: string;
    hunks: Hunk[];
};
/**
 * Parses the subset of unified diff that `git diff --no-index` emits for text
 * files: file headers, hunk headers, and ` `/`-`/`+` body lines. Anything else
 * (rename, mode, binary) is unsupported on purpose — patches here are expected
 * to be small edits to shipped JavaScript.
 */
export declare function parseUnifiedDiff(patch: string): FilePatch[];
/**
 * Applies every hunk, or returns `null`. A patch is never partially applied.
 */
export declare function applyHunks(source: string, hunks: Hunk[]): string | null;
export declare function reverse(hunks: Hunk[]): Hunk[];