import type { CommandFnResult } from '../../../config.ts';
import type { CLIInvocation } from '../../types.ts';
/**
 * Diff two commits.
 *
 * One revision diffs it against HEAD's tree, two diff against each other. The
 * working tree is not a party to this yet: comparing against it needs the index
 * and the worktree scan, which is where unstaged and staged diffs live.
 */
export declare function diff(inv: CLIInvocation): Promise<CommandFnResult>;
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