Any advanced tips for using skills and Claude Code for writing?

I've been using Claude Code for the past two weeks to build something like a screenwriting framework, and it goes ok. For sure better than just chatting in the browser. I have a local workspace with Markdown files and 20+ custom skills handling things like character building, themes, visual motifs, structure etc. I have also review skills to handle the ai "cheerleading" that hits my nerves.

I'm ok with the results so far and it helped a lot in a project i tried, but I still feel like I'm barely scratching the surface of what an agentic setup can do. Has anyone else built custom workflows or pushed Claude Code to the absolute limit for creative writing? Mostly development. I think ai can be more useful there and im really curious to find out what the celling is. Im thinking next step is building a rag with screenplays and theory books. IDK.