u/Tricky-Engineer-5680

I am embarrassingly over my head with Claude. I originally built custom agents in ChatGPT that knew our current projects, goals, target market, etc. I could ask it to write something for me and it would automatically reference our projects and goals and write in our brand voice. I'm trying to do the same with Claude (our company has migrated over to this AI) but do I use persistent memory? Do i have to upload a .md file with context every time I need to prompt it? I'm looking for NON developer project help. How do i build something easy to use? I have the Pro account if that matters.