import type { CliInstallMethod } from "../core/cli-types.js";
export interface UpdateCheckCache {
    lastCheckedAt: string;
    latestVersion: string;
    currentVersion: string;
}
export declare function getUpdateCheckPath(): string;
/**
 * Read cached update check result. Returns null if missing or expired.
 */
export declare function readUpdateCheck(maxAgeMs?: number): Promise<UpdateCheckCache | null>;
/**
 * Check for the latest CLI version and write the result to the cache file.
 * Runs inline with a short timeout — no child process needed.
 */
export declare function checkForUpdate(currentVersion: string, installMethod: CliInstallMethod): Promise<void>;
/**
 * Simple semver comparison: returns true if `latest` is newer than `current`.
 */
export declare function isNewerVersion(current: string, latest: string): boolean;
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