Restore “custom prompts” feature

What variant of Codex are you using?

codex-cli 0.137.0

What feature would you like to see?

Skills cannot replace custom prompts.

Sometimes, when there are many changes in the codebase, I want to send a message to Codex like, "Scan this codebase for bugs. If you find a real bug, you get one point. If it's not a bug but you report it as one, you lose two points." Making this into a skill would be quite strange.

In theory, I could write "After completing the task, provide a git commit message" in the skill, but sometimes the AI forgets, so I still need to remind it occasionally.

Additional information

_No response_