set preference and carry useful context across chats:

Choose a personality:

Friendly, pragmatic,or None

Add custom instructions:

In your global AGENTS.md

Carry context forward with memories:

Memories are separate from required project guidance. Keep instructions that must always apply in AGENTS.md or checked-in project documentation.

Add recent activity with Computer History

Review what Computer History includes before enabling it

Manage personalization:

pen Settings to update your personality, custom instructions, memories, and other available personalization controls. See ChatGPT desktop app settings for an overview of everyday preferences.