Unable to create custom "/" commands.

What version of Codex is running?

v0.72.0

What subscription do you have?

plus

Which model were you using?

gpt-5.1-codex-max medium

What platform is your computer?

Linux 6.17.4-76061704-generic x86_64 x86_64

What issue are you seeing?

i do not have access to the features described in the documentation, custom "/" commands.

https://developers.openai.com/codex/guides/slash-commands#create-your-own-slash-commands-with-custom-prompts

What steps can reproduce the bug?

Uploaded thread: 019b1984-

What is the expected behavior?

ability to run custom "/" commands from either "prompts" or "tools".

Additional information

_No response_