Thought this might help others who have to communicate with a difficult co parent. Those who are argumentative, avoiders, narcissistic traits etc.
I write what I want to say/want to happen in notes. Then I go to chatgpt and ask it to rewrite what I've written succinctly using Non violent communication language. And it spits it out. Clear, concise, no fluff, no apology and very little the other person can try to seize upon and attack
It's saved me hours of trying to write texts and emails. Obviously, the other person is difficult by definition so there's every chance they won't respond/be reasonable with a request, but there's nothing for them to hang onto and start an argument about.
Hope this helps someone else