/**
 * The major version of the installed `@angular/compiler` package, parsed
 * from `o.VERSION.major`. Falls back to `DEFAULT_ASSUMED_MAJOR` when the
 * version is unavailable.
 */
export declare const ANGULAR_MAJOR: number;
/**
 * Returns `true` when the installed Angular major is at least `major`.
 * Use this to gate code paths that depend on APIs introduced in a
 * specific Angular release.
 *
 * @example
 *   if (angularVersionAtLeast(21)) {
 *     // Use Angular 21+ API
 *   } else {
 *     // Fall back to v19/v20 behavior
 *   }
 */
export declare function angularVersionAtLeast(major: number): boolean;