/**
 * Cross-platform "open this URL in the default browser" helper.
 *
 * Used by `topic open` and `trail open-web`. Detaches + unrefs the child so
 * the CLI returns immediately rather than waiting on the browser process.
 * Headless machines (CI, ssh sessions) will see a friendly stderr warning;
 * the URL itself is still printed to stdout by the caller, so the user can
 * always copy it.
 */
export declare function openInBrowser(url: string): void;
//# sourceMappingURL=open-url.d.ts.map