Allow CLI to use skills as first token in prompt - Remove "Unrecognized command"

What version of Codex CLI is running?

codex-cli 0.120.0

What subscription do you have?

Pro

Which model were you using?

_No response_

What platform is your computer?

_No response_

What terminal emulator and version are you using (if applicable)?

_No response_

What issue are you seeing?

If you start a message to codex with a valid command i.e. /babysit-pr it fails with "Unrecognized command"

So you have to add a token in front like, "use" when really that should not be necessary.

Sometimes, I specifically want to start a sentence with a skill like,/test this new feature, which is like a rather large verb behind that but the AI will absolutely get it once it processes the skill.

However, this is not allowed...for seemingly historical reasons when commands and skills had to be treated 100% differently.

What steps can reproduce the bug?

Create a valid skill, invoke it in the middle of a sentence. Do it again at the start. it fails.

What is the expected behavior?

It simply processes the skill as it otherwise would.

Additional information

_No response_