Escape sequences such as `[105;1:3u` are inserted when typing prompts

Resolved 💬 5 comments Opened Aug 22, 2025 by your-diary Closed Nov 3, 2025

💡 Likely answer: A maintainer (etraut-openai, contributor) responded on this thread — see the highlighted reply below.

What version of Codex is running?

codex-cli 0.23.0

Which model were you using?

_No response_

What platform is your computer?

Darwin 24.6.0 arm64 arm

What steps can reproduce the bug?

When I type a prompt, escape sequences are often inserted.

For example, when I type

What response will be returned when an expire

, the actual result is

What response will be returned when an expi[105;1:3ure[114;1:3u

, meaning two escape sequences [105;1:3u and [114;1:3u are inserted for some reason.

What is the expected behavior?

_No response_

What do you see instead?

_No response_

Additional information

I'm using iTerm2 as a terminal emulator.

echo $TERM outputs xterm-256color.

View original on GitHub ↗

5 Comments

etraut-openai contributor · 10 months ago

Thanks for the bug report. Apologies for the slow response — we are behind on responding to issues.

Is this problem still occurring for you with the latest version of Codex? We've made a lot of changes and improvements since 0.23.0.

your-diary · 9 months ago

@etraut-openai
Recently I don't have the issue.
Closing...

(Let me reopen the issue when I stared to having the issue again.)

hkroger · 8 months ago

I am getting these same sequences with latest codex. I am using iTerm2 3.6.6 if that makes any difference.

❯ codex --version
codex-cli 0.66.0

hkroger · 8 months ago

Can you @etraut-openai reopen this?

etraut-openai contributor · 8 months ago

@hkroger, please file a new bug with configuration details (e.g. the terminal you're using) and repro steps. The problem you're seeing unlikely to be the same cause as the problem described by the OP in this thread.