Codex app: Allow developer instructions per project, not as a whole

What variant of Codex are you using?

App

What feature would you like to see?

Right now we can only add instructions for customization / personalization for the entire app - please allow customizations (custom developer prompt) _per_ project. When using the CLI, I utilize custom global prompts / roles (as developer instructions) separately from the AGENTS.md per project. This allows me to use a universal Swift Developer role for certain projects without repeating myself in each AGENTS.md

Additional information

_No response_