Support for custom commands (custom slash commands)

What version of the VS Code extension are you using?

0.4.46

What subscription do you have?

ChatGPT Business

Which IDE are you using?

VS Code

What platform is your computer?

Darwin 25.1.0 arm64 arm

What issue are you seeing?

We have a need to be able run our own custom commands/prompts.

It seems the extension does not read from the .codex folder for anything, like the Codex CLI does. It would make sense that the extension reads .codex folder, as a place to live for codex custom commands and rules.

Currently the extension only support general slash commands - but no custom commands.

What steps can reproduce the bug?

1. make a custom command in .codex or similar .codex/prompts folder.
2. try and call it by writing / in the chat. It is not found.

What is the expected behavior?

1. make a custom command in .codex or similar .codex/prompts folder.
2. try and call it by writing / in the chat. It is now found and can be executed like a command.
3. it will read the content of the file just like a prompt

Additional information

Other Agents can do this. Like Claude, Co-Pilot, Cursor etc.