codex cli sometimes exits, saying "The cursor position could not be read within a normal duration"

I am using a custom PTY manager to spawn agent TUI sessions. I was able to work around this issue by responding to the cursor position request.

        // Auto-respond to cursor position queries when no clients are attached
        // Many TUIs send CSI 6 n ("DSR: Report Cursor Position") and expect
        // the terminal to reply with CSI row ; col R. When no web client is
        // attached, there is no terminal emulator to answer, so we synthesize
        // a safe default of 1;1.
        if (this.getConnectedClientCount() === 0 && typeof data === 'string') {
          try {
            // Match both 8-bit CSI (\x9B) and 7-bit ESC [ (\x1b[) forms
            const hasCprRequest = /(?:\x9B|\x1b\[)\??6n/.test(data);
            if (hasCprRequest && this.ptyProcess && this.is_active) {
              // Respond with "ESC [ 1 ; 1 R"
              logger.info(`Session ${this.session_id}: Detected cursor position request (CSI 6n) with no clients attached, responding with ESC[1;1R`);
              this.ptyProcess.write("\x1b[1;1R");
            }
          } catch (e) {
            // Non-fatal: ignore parsing errors
          }
        }

I am not a terminal emulation expert but it seems nonstandard to exit if there is no response to the query. Or perhaps tmux should be responding, I really don't know.

Should be fixed by https://github.com/openai/codex/pull/2870