/**
 * `memi diff` — Show what changed since the last design system pull.
 *
 * Compares the current registry state against the saved pull snapshot
 * and reports: new tokens, removed tokens, changed values, new/removed components.
 */
import type { Command } from "commander";
import type { MemoireEngine } from "../engine/core.js";
export interface DiffPayload {
    tokens: {
        added: string[];
        removed: string[];
        changed: Array<{
            name: string;
            field: string;
            from: string;
            to: string;
        }>;
    };
    components: {
        added: string[];
        removed: string[];
    };
    lastSync: string | null;
    previousSync: string | null;
}
export declare function registerDiffCommand(program: Command, engine: MemoireEngine): void;