/**
 * Environment Detection Utilities
 *
 * Detects headless environments (SSH, Docker, no display) to enable
 * graceful degradation of features that require a graphical desktop.
 *
 * @since v2.3.11
 */
/**
 * Detect if running in a headless environment (no graphical desktop).
 *
 * Checks for:
 * - SSH session (SSH_CLIENT or SSH_TTY set)
 * - Docker container (/.dockerenv exists or `container` env var set)
 * - Linux without display server (no DISPLAY or WAYLAND_DISPLAY)
 */
export declare function isHeadless(): boolean;
/**
 * Check if we can reasonably expect `xdg-open` / `open` to work.
 * Returns false in headless environments where browser opening will fail.
 */
export declare function canOpenBrowser(): boolean;
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