/**
 * Shared CORS origin-checking logic for the TinaCMS dev server.
 *
 * By default only localhost / 127.0.0.1 / [::1] (any port) are allowed.
 * Users can extend this via `server.allowedOrigins` in their tina config.
 * The special keyword `'private'` expands to all RFC 1918 private-network
 * IP ranges (10.x, 172.16-31.x, 192.168.x) — useful for WSL2, Docker
 * bridge networks, etc.
 */
/**
 * Build a CORS `origin` callback compatible with the `cors` npm package.
 */
export declare function buildCorsOriginCheck(allowedOrigins?: (string | RegExp)[]): (origin: string | undefined, callback: (err: Error | null, allow?: boolean) => void) => void;