/**
 * Update check for the lumen PI extension.
 * Lifted from @the-forge-flow/visual-explainer-pi: src/update-check.ts.
 *
 * Fetches the latest version from npm registry and compares with current version
 * to notify users when an update is available.
 */
export interface UpdateInfo {
    currentVersion: string;
    latestVersion: string;
    updateAvailable: boolean;
}
/**
 * Check if an update is available
 * Returns null if check fails (silently)
 */
export declare function checkForUpdates(_pi: unknown): Promise<UpdateInfo | null>;
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