/**
 * Minimal semantic-version helpers.
 *
 * This is a small, real slice of the shared CLI-core surface (T7 lists semver
 * utilities among the core modules). It gives CI something meaningful to build
 * and test today; the larger cli-core modules (project identity/pin, OAuth
 * device login, machine credentials, setup-mcp/install-plugin) land in b2/b3.
 */
export interface SemVer {
    readonly major: number;
    readonly minor: number;
    readonly patch: number;
}
/**
 * Parse a strict `MAJOR.MINOR.PATCH` version string (no pre-release / build
 * metadata). Returns `null` for anything that is not a well-formed core semver.
 */
export declare function parseSemver(input: string): SemVer | null;
/** Whether `input` is a strict `MAJOR.MINOR.PATCH` version string. */
export declare function isValidSemver(input: string): boolean;
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