Function appendWhenIdle

src/screens/REPL.tsx:4867–4881

(msg: string)

            // so it lands after the assistant reply, not
            // between the user's prompt and the reply.
            const appendWhenIdle = (msg: string) => {
              if (!queryGuard.isActive) {
                appendStdout(msg);
                return;
              }
              const unsub = queryGuard.subscribe(() => {
                if (queryGuard.isActive) return;
                unsub();
                // Skip if the user stopped ultraplan while we
                // were waiting — avoids a stale "Monitoring
                // <url>" message for a session that's gone.
                if (!store.getState().ultraplanSessionUrl) return;
                appendStdout(msg);
              });
            };
            void launchUltraplan({
              blurb,
              getAppState: () => store.getState(),