What version of Codex is running?
0.93.0
What subscription do you have?
Plus
Which model were you using?
No response
What platform is your computer?
Linux 6.2.0-35-generic x86_64 x86_64
What terminal emulator and version are you using (if applicable)?
Ghostty
What issue are you seeing?
Scrollback in Zellij still does not work even when alternate screen is disabled (--no-alt-screen / tui.alternate_screen="never"). This looks like a different root cause than #2558: Codex keeps doing full-screen redraws in the main buffer (cursor addressing, clears, scroll regions), so Zellij does not accumulate scrollback lines.
Versions
- codex-cli: 0.93.0
- zellij: 0.43.1
- OS: Linux
- TERM: xterm-256color
Environment notes
ZELLIJ is 0 by default in my session; I also tested with ZELLIJ=1 explicitly and behavior did not change.
What steps can reproduce the bug?
- Start Zellij.
- Run:
codex --no-alt-screen
(also tested codex -c 'tui.alternate_screen="never"' --no-alt-screen)
- Generate enough output to exceed pane height.
- Enter Zellij scroll/copy mode and try to scroll back.
What is the expected behavior?
Expected
Zellij pane scrollback should show earlier Codex output when alternate screen is disabled.
Actual
Only the current screen is visible; scrollback remains empty / truncated.
Additional information
Diagnostics
I captured terminal output with:
script -q -c "codex --no-alt-screen" /tmp/codex.tlog
Findings:
- No alt-screen sequences (
CSI ?1049h/?1047h/?47h not present)
- No scrollback clear (
CSI 3 J) and no terminal reset (ESC c)
- Full-screen redraw patterns present (cursor addressing
CSI row;col H, CSI J, CSI K, scroll regions CSI r, reverse index ESC M)
- Synchronized output toggles (
CSI ?2026 h/l) are present
This suggests --no-alt-screen keeps the full-screen TUI renderer, but just in the main buffer. Zellij doesn’t build scrollback from in-place redraws, so
there is still nothing to scroll.
Related
Possible direction
Add a true “inline / line-based output” mode (no cursor addressing / screen clears / scroll regions), or a config option that switches to a non-fullscreen renderer in Zellij.
What version of Codex is running?
0.93.0
What subscription do you have?
Plus
Which model were you using?
No response
What platform is your computer?
Linux 6.2.0-35-generic x86_64 x86_64
What terminal emulator and version are you using (if applicable)?
Ghostty
What issue are you seeing?
Scrollback in Zellij still does not work even when alternate screen is disabled (
--no-alt-screen/tui.alternate_screen="never"). This looks like a different root cause than #2558: Codex keeps doing full-screen redraws in the main buffer (cursor addressing, clears, scroll regions), so Zellij does not accumulate scrollback lines.Versions
Environment notes
ZELLIJis0by default in my session; I also tested withZELLIJ=1explicitly and behavior did not change.What steps can reproduce the bug?
codex --no-alt-screen(also tested
codex -c 'tui.alternate_screen="never"' --no-alt-screen)What is the expected behavior?
Expected
Zellij pane scrollback should show earlier Codex output when alternate screen is disabled.
Actual
Only the current screen is visible; scrollback remains empty / truncated.
Additional information
Diagnostics
I captured terminal output with:
script -q -c "codex --no-alt-screen" /tmp/codex.tlog
Findings:
CSI ?1049h/?1047h/?47hnot present)CSI 3 J) and no terminal reset (ESC c)CSI row;col H,CSI J,CSI K, scroll regionsCSI r, reverse indexESC M)CSI ?2026 h/l) are presentThis suggests
--no-alt-screenkeeps the full-screen TUI renderer, but just in the main buffer. Zellij doesn’t build scrollback from in-place redraws, sothere is still nothing to scroll.
Related
Possible direction
Add a true “inline / line-based output” mode (no cursor addressing / screen clears / scroll regions), or a config option that switches to a non-fullscreen renderer in Zellij.