Best way to go from an Excel list of Contact IDs to a Civi group
I get regular requests to turn an external list of contact IDs into a Civi group. I don't have a nice way of doing this atm.
Search Builder
The best approach I have so far is with Search Builder, of all things. I have a little bit of javascript that adds an input and then turns that into a search builder search. This sends the data via POST to the usual search results screen, where you can save it to a group in the normal way. You can do this with tens of thousands of IDs.
But Search Builder is going away, and it'd be nice to do it in a nice Form Builder screen that doesn't need refreshing.
Search Kit / Form Builder
Search Kit can't quite do it. You can't paste in a comma-separated list of IDs:
(you can paste in comma-separated lists for other fields, just not when it's not a lookup field like Contact ID)
I thought about making a custom quickform that links to a Search with the values in the URL - but this hits limits of the max length of URLs. And we regularly have tens of thousands of people.
Any other ideas? Is there any way to send data to Search Kit in the POST?