import { type Tree } from '@nx/devkit';
import { type SupportedRsbuildMajorVersion } from './versions';
/**
 * Returns the declared @rsbuild/core major version from the workspace's
 * package.json when it matches a supported major, or `undefined` otherwise
 * (fresh install, dist tag, unknown major). Below-floor enforcement is
 * handled at generator entry points via `assertSupportedRsbuildVersion`.
 */
export declare function getInstalledRsbuildMajorVersion(tree: Tree): SupportedRsbuildMajorVersion | undefined;
/**
 * Returns the installed @rsbuild/core major version resolved at runtime from
 * node_modules. For use in executors and runtime code where no Tree is
 * available. Returns `null` when @rsbuild/core can't be resolved or the
 * installed major isn't supported.
 */
export declare function getInstalledRsbuildVersionRuntime(): SupportedRsbuildMajorVersion | null;
/**
 * Returns the version-map entry for the installed major, falling back to the
 * latest supported map when no installed version is detected (fresh install)
 * or the detected major is outside the supported window.
 */
export declare function getRsbuildVersionsForInstalledMajor(tree: Tree): {
    rsbuildVersion: string;
    rsbuildPluginReactVersion: string;
    rsbuildPluginVueVersion: string;
    rsbuildPluginSassVersion: string;
};