declare const POLICY_A_KEY_RE: RegExp;
export interface KeySanitizeResult {
    /** True when `key` differs from `raw`. */
    changed: boolean;
    /** The Policy-A-valid key (== `raw` when nothing needed changing). */
    key: string;
    /** Human-readable list of the transforms that fired (empty when unchanged). */
    reasons: string[];
}
export declare function sanitizePolicyAKey(raw: string): KeySanitizeResult;
/** True when a key already satisfies Policy A (no sanitizing needed). */
export declare function isPolicyAConformant(key: string): boolean;
export { POLICY_A_KEY_RE };