/**
 * Best-effort "new version available" check against the npm registry.
 *
 * Compares the locally-installed @agentled/cli version (from package.json)
 * against the latest published on npm and prints a one-line warning if the
 * user is behind. Never blocks setup on failure — a flaky network or
 * registry should not prevent first-time onboarding.
 */
/**
 * Read the version field from this package's own package.json. Returns
 * '0.0.0-dev' as a fallback so a missing/unreadable file doesn't crash setup.
 */
export declare function getInstalledCliVersion(): string;
export interface VersionCheckResult {
    installed: string;
    latest: string | null;
    /** True if the registry returned a version newer than installed. */
    outdated: boolean;
    /** Set when the registry could not be reached or parsed. */
    error?: string;
}
export declare function checkCliVersion(): Promise<VersionCheckResult>;
/** One-line summary suitable for the setup banner. Returns null if there is nothing to say. */
export declare function summarizeVersionCheck(r: VersionCheckResult): string | null;