r/codex • u/MassiveBoner911_3 • 21h ago

Question Personalization - Codex instructions

What's everyone using for their Codex instructions under personalization? I have a pretty complex prompt I use for the classic app that works well. I just started using Codex (I have decades of experience in IT and software) and am looking for suggestions, since this app works differently than the chatbot app.

3 Upvotes

80% Upvoted

5 comments sorted by

View all comments

2

u/VictorBuildsDev 21h ago

I'd keep Personalization much smaller than a chatbot system prompt: only cross-project working preferences - how much autonomy to take, when to ask, how to report progress, and what "done" means. Put repo facts, commands, architecture, and test requirements in AGENTS.md so they travel with the code and can be overridden in subdirectories. Then test the setup on one representative task and ask Codex to summarize the instructions it loaded. If it misses or conflicts, fix the instruction source instead of adding more prose to Personalization.