export interface SuppressTerminalStderrOptions {
    /** Redirect target path; defaults to today's jeopi log file, then /dev/null. */
    redirectPath?: string;
    /** Bypass the macOS + same-terminal gate. Tests only. */
    force?: boolean;
}
/**
 * Redirect fd 2 away from the terminal while the TUI owns the viewport.
 * Returns true when suppression is (already) active. No-op — returning
 * false — off macOS, when stderr does not target the stdout terminal, or
 * when the libc fd ops are unavailable.
 */
export declare function suppressTerminalStderr(options?: SuppressTerminalStderrOptions): boolean;
/**
 * Re-point fd 2 at the saved terminal stderr. Safe to call unconditionally:
 * no-op when suppression is not active. Called at every terminal-ownership
 * release and by the postmortem fatal handlers before they print, so crash
 * reports reach the real terminal.
 */
export declare function restoreTerminalStderr(): void;
/** Whether fd 2 is currently redirected away from the terminal. */
export declare function isTerminalStderrSuppressed(): boolean;