In the Aggregate Pipeline, when the stage is Project, have an option to auto-generate "field_name : 1" entries for all the fields in the source data.

It's not uncommon for me to want to include all or most of the fields I already have, plus a few calculated fields.

But once you add calculated fields, you have to specify all the other fields you want to pass through, in the form "field_name : 1". Otherwise, all you'll get from this stage is your calculated field(s).

I suggest a button or context menu option to auto-generate "field_name : 1" entries for all the other fields.

This would work better for my use case than auto-completion, because if there were more than 10 or so fields, I'd still have a lot of clicking and ": 1," typing to do.

And it's always easier to delete unwanted entries than to type the wanted entries in, even with auto-completion.