Over-contributed to HSA?

I have family HDHP coverage. Part-way through the year, my wife signed herself (only) up for Direct Primary Care (DPC). That makes her ineligible for HSA.

 

I'm employed. She's not. I have an HSA. She doesn't. We are not withdrawing anything from our HSA this year.

 

I have read that my contribution limit is not affected by other family members HSA-eligibility, so long as I have HDHP coverage.  Is that accurate? Can someone provide a definitive reference (because I just found it on a random web site.)

 

Can I still make the maximum family *contribution* to my HSA? Why?