export type DiffLineKind = "+" | "-" | " ";
export interface DiffLine {
    kind: DiffLineKind;
    text: string;
    oldNo: number | null;
    newNo: number | null;
}
/** header: the "@@ -a,b +c,d @@ ctx" line */
export interface DiffHunk {
    header: string;
    lines: DiffLine[];
}
export interface DiffFile {
    /** the new path (the old path for a deletion) */
    path: string;
    /** set for a rename (or copy) */
    oldPath?: string;
    status: "A" | "M" | "D" | "R";
    binary: boolean;
    /** set when the file is too big to show: its text instead of hunks */
    summary?: string;
    hunks: DiffHunk[];
}
export interface TaskDiff {
    base: string;
    tip: string;
    files: DiffFile[];
    truncated: boolean;
}
/** A file whose hunks exceed this many lines: summary only. */
export declare const DIFF_FILE_MAX_LINES = 2000;
/** Or whose diff text exceeds this. */
export declare const DIFF_FILE_MAX_BYTES: number;
/** The whole diff output read; beyond: truncated, later files dropped. */
export declare const DIFF_TOTAL_MAX_BYTES: number;
/** A line's text is kept at most this many characters. */
export declare const DIFF_LINE_MAX = 2000;
/** Parse the text of `git diff` into files. Never throws. */
export declare function parseUnifiedDiff(text: string): DiffFile[];
/**
 * Everything the task changed against where it branched: committed and uncommitted tracked changes,
 * plus untracked files. undefined when git cannot say (no such base, worktree gone). Read-only.
 */
export declare function taskDiff(path: string, baseRef: string): Promise<TaskDiff | undefined>;