/**
 * Version check + update notice for the login command
 */
/**
 * Check if a newer CLI version is available and notify the user. Also recommends
 * the Node.js version the CLI is locked to (from `engines.node`) when the running
 * Node major differs.
 *
 * This is informational only — it never prompts and never installs. It just tells
 * the user what a newer version / supported Node looks like and the command to run.
 * Returns silently if everything is current or the check fails.
 *
 * @param noColor - disable ANSI colors in the output.
 * @param runningNodeVersion - the active Node version; injectable for testing.
 */
export declare function checkAndNotifyUpdate(noColor: boolean, runningNodeVersion?: string): Promise<void>;
/**
 * Returns true if `latest` is strictly newer than `current` using semver ordering.
 */
export declare function isNewerVersion(current: string, latest: string): boolean;
/**
 * Extract every supported Node major from an `engines.node` range. The canonical
 * form is `"24.x || 25.x || 26.x"` (→ [24, 25, 26]); for a bare lower bound or a
 * semver range (e.g. ">=24" or ">=24.0.0 <25.0.0") it falls back to the first
 * number (→ [24]). Returns an empty array when nothing is parseable.
 */
export declare function parseSupportedNodeMajors(engineRange: unknown): number[];
/**
 * Build the Node-version recommendation lines, or null when no recommendation is
 * needed (the running major is already supported, or the supported set is empty).
 *
 * @param supportedMajors - the Node majors the CLI supports (from `engines.node`).
 * @param runningVersion - the active Node version (with or without a leading "v").
 */
export declare function nodeVersionNotice(supportedMajors: number[], runningVersion: string): string[] | null;
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