import type { Context, Next } from 'hono';
/**
 * Unified auth middleware.
 * - localhost requests (127.0.0.1 / ::1) → pass through (MCP)
 * - API key in Authorization header → validate against api_keys table
 * - Session cookie → validate via Better Auth
 */
export declare function unifiedAuth(c: Context, next: Next): Promise<void | (Response & import("hono").TypedResponse<{
    error: string;
}, 401, "json">)>;