export declare function nativeCredentialStoreAvailable(): boolean;
/** Read the shield key from the Credential Manager. Undefined when absent/unavailable. */
export declare function readShieldKeyNative(shieldId: string): string | undefined;
/**
 * Store the shield key, read-back verified. Returns false when the native
 * store is unavailable or the verify failed — callers keep their fallback.
 */
export declare function saveShieldKeyNative(shieldId: string, shieldKey: string): boolean;
/** Remove the entry (unenroll / re-enroll cleanup). Best-effort. */
export declare function deleteShieldKeyNative(shieldId: string): void;
/**
 * Deep self-test probe: write + read + delete a throwaway entry with the exact
 * code paths used for the shield key. Proves the native store works end-to-end
 * on THIS machine under the current EDR/policy regime.
 */
export declare function nativeStoreRoundtripProbe(): {
    ok: boolean;
    detail: string;
};