By "finish package," the later trades are probably meant, which are often subcontracted (sometimes because they are not included from the start or sometimes because they are removed to save costs). So probably plumbing, possibly electrical work, tiling, painting, some even offer built-in wardrobes; here, exterior canopies and such were also mentioned. I believe the general contractors still earn quite well in that area, and there is still a lot of potential for adding extras.
Plumbing, electrical work, tiling, and painting are all included with us; our house seller did not offer exterior canopies, outdoor lamps, or built-in wardrobes.
And by "thick-as-a-bible interface documentation" the additional effort and documentation is probably meant, ...
Even though all trades are included with our house seller, I still hope for detailed documentation so that we know what was executed where and how, in case something has to be changed, repaired, or replaced later.
Thank you for your explanations, now I understand. :)
By finish package I mean the additions subcontracted to the local lamp store, metalworker, etc., such as the attachment of canopies, awnings, pergolas, and Griswold-style facade illumination, which the oh-so-individual home needs as much as the Manta needs a fox tail on the antenna. And the interface documentation are the datasheets you expect for upper cabinet hanging loads and the like, for which the general contractor should, please, give the trade-subcontracting builder exhaustive accountability.
I did not know that our house seller offered all that as well. We talked once about awnings, but he would only have offered the reinforcement at the respective spot, and we would have to decide immediately where exactly we wanted the awnings. He would not have sold or installed the awning itself. He also did not offer us outdoor lamps. It would have been fine with us if he had taken care of everything. So apparently there was a communication problem there as well. ;-)