Dealing with mentally ill but “competent” clients?

Baby/ Toddler PD. How do y’all approach situations where a client insists they are a CI, that others are trying to mind control them via microwaves/ 5G/ misc electronics, are victims of gang stalking, etc.?

How should you react/ respond when they shut down or begin to distrust you if they feel you are dismissive of their delusions or distrust their narrative?

Any tips on what to absolutely avoid in these circumstances? Generally and in terms of protecting my ass (while also protecting the clients’ too~obviously)?

Not really sure how to navigate these situations and haven’t really received much guidance.