/**
 * S1 / rid=api-diff-report — `peaks scan api-diff <doc>`.
 *
 * Group choice: `scan`, not a new top-level `api` group. `scan` already hosts
 * `api-surface` — a read-only, `--project`-scoped API analysis that writes no
 * artifact — so `api-diff` is a sibling of an existing command with identical
 * semantics and an identical option shape. A new `peaks api` group would be a
 * brand-new verb family whose cost the design (docs/superpowers/specs/
 * acknowledged; nothing about this slice needs it.
 *
 * The command is read-only: it creates no contract artifact and writes no file.
 */
import type { Command } from 'commander';
import { type ProgramIO } from '../cli-helpers.js';
export declare function registerApiDiffCommands(program: Command, io: ProgramIO): void;