import type { Runtime } from './tiers.js';
export type Manager = Runtime | 'npm' | 'yarn';
export type Instead = {
    kind: 'cannot';
    lockfile: string;
    tool: 'yarn-berry';
} | {
    empty: boolean;
    kind: 'cannot';
    lockfile: string;
    tool: 'yarn-unreadable';
};
export type Choice = {
    kind: 'unknown';
} | {
    kind: 'use';
    manager: Manager;
} | Instead;
export declare const chooseManager: (root: string, given: Manager | undefined) => Choice;
export type Move = {
    at: string;
    block: string;
    name: string;
    to: string;
};
export declare const commandsInstead: (instead: Instead, moves: readonly Move[]) => string[];
export declare const insteadRefusal: ({ instead, moves, root }: {
    instead: Instead;
    moves: readonly Move[];
    root: string;
}) => string;
export declare const versionOf: (command: string, cwd: string) => Promise<string | undefined>;
export declare const yarnOneRefusal: (root: string) => Promise<string | undefined>;