import type { VersionInfo, DocsPage } from '../types.js';
/**
 * Validate that a version string is acceptable (semver-like or named).
 */
export declare function validateVersionString(version: string): boolean;
/**
 * Compare two version strings for sorting. Named versions sort before semver.
 * Returns negative if a < b, positive if a > b, 0 if equal.
 */
export declare function compareVersions(a: string, b: string): number;
/**
 * Select the default version from a list. Returns the one marked isDefault,
 * or falls back to the latest by version comparison.
 */
export declare function selectDefaultVersion(versions: VersionInfo[]): VersionInfo | null;
/**
 * Prepare page objects for insertion when copying pages to a new version.
 */
export declare function prepareVersionCopy(sourcePages: DocsPage[], newVersionId: string): Array<{
    versionId: string;
    title: string;
    slug: string;
    content: unknown;
    sortOrder: number;
    parentId: string | null;
}>;
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