/**
 * Semantic versioning utility functions
 */
type RangeEvaluation = boolean | null;
/**
 * Validate if a string is a valid semantic version
 *
 * @param version Version string to validate (can have optional 'v' prefix)
 * @returns true if valid semver, false otherwise
 */
export declare function isValidSemver(version: string): boolean;
/**
 * Validate and normalize a semantic version string
 *
 * @param version Version string to validate
 * @throws Error if version is not valid semver
 * @returns Normalized version without 'v' prefix
 */
export declare function validateAndNormalizeSemver(version: string): string;
/**
 * Check whether a dependency range includes a concrete workspace package version.
 *
 * This intentionally supports only the small zero-dependency subset doctor needs:
 * workspace: protocol ranges, exact versions, ^, ~, >=, and OR-joined (`||`)
 * combinations of those forms. Unknown syntax returns null so advisory checks can
 * skip it without producing false warnings.
 *
 * @param range Dependency range string from package.json
 * @param version Concrete workspace package version
 * @returns true/false when evaluated, null when the syntax is outside the supported subset
 */
export declare function rangeIncludesVersion(range: string, version: string): RangeEvaluation;
export {};