export declare function getOptionalDepPackageName(platform?: string, arch?: string): string;
/**
 * Resolve the relayfile-mount binary path.
 *
 * Search order:
 *   1. Explicit env override (RELAYFILE_MOUNT_BIN)
 *   2. Local source-checkout build (bin/ or dist/), when loaded from a checkout
 *   3. Platform-specific optional-dep package — primary production path
 *   4. PATH lookup
 *
 * @returns Absolute path to the binary, or null if none is found.
 */
export declare function getRelayfileMountBinaryPath(): string | null;
/**
 * Human-readable error explaining that the optional-dep package for the
 * current platform/arch isn't installed.
 */
export declare function formatMountNotFoundError(): string;