import type { Tool } from '@wrongstack/core/types';
export type DiffMode = 'unified' | 'side-by-side' | 'stat';
export interface DiffInput {
    path?: string | undefined;
    files?: string | string[] | undefined;
    a?: string | undefined;
    b?: string | undefined;
    staged?: boolean | undefined;
    mode?: DiffMode | undefined;
    context?: number | undefined;
}
export interface DiffOutput {
    diff: string;
    files: string[];
    truncated: boolean;
    /**
     * The format actually produced: 'unified' or 'stat' on the git path,
     * 'dump' on the files-only line-numbered dump path.
     */
    mode: string;
    note?: string | undefined;
}
export declare const diffTool: Tool<DiffInput, DiffOutput>;
/**
 * True when a diff "ref" is shaped like a filesystem path that git would read
 * with implicit `--no-index`: absolute (`/etc/x`, `C:\x`, `\\server\x`),
 * drive-prefixed (`C:x`), or carrying a `..` path SEGMENT (`../x`, `a/../../x`).
 * Revision ranges (`main..feature`, `..feature`, `main...`) have no separator
 * around the dots and are unaffected.
 */
export declare function refLooksLikeOutsidePath(ref: string): boolean;
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