Oh that's interesting! In my mind we are now on the cusp of being able to scan all these archives and have them be read by LLMs (in a first pass). Do you agree with that assessment, or am I being naive here?
Old books aren't that neat, you tend to have a lot of notes and other documents, translations, scribal annotations from different eras interleaved or in the margins. You need to make decisions about that stuff as you go, which requires being informed about the context and meaning of those documents, that may well be in another language, or from hundreds of years before or after the document you're trying to process. For any given physical object it's quite likely that no single scholar has all the information necessary.
It is also extremely important to preserve all the context, things like which exact pages a fragment is stuck between, even its orientation, can be critical information to later scholars. And then in all of this you're handling ancient & precious one of a kind paper documents. It's just slow going, and well beyond what I would even consider "skilled labor" this very much is the work of research & scholarship. By the time you get a camera pointed at a page you're at the easy part.
As for imaging, there is Irish Scripts on Screen (https://www.isos.dias.ie/) which covers many different places and time periods.
Answering the grandparent comment, LLMs are not good at Old Irish. Seriously, they are awful at it. There is just too little data for it to work. I wrote a very little bit about text clustering in Old/Middle Irish (see https://doi.org/10.1515/9783110680744-005). I think the better place to start is transcription and there are some tools out there which help, like Transcribus (https://www.transkribus.org/), which I haven't used but it looks useful.
edit:typos
And of course, title pages are a later invention so the only way to know what’s in a manuscript is to actually read it.
That said, I've found the recent LLMs will happily accept an entire book of scanned pages (just the images) and summarize the complete contents in one single go, which definitely has a very useful purpose in cataloging and indexing publications. For a project I'm doing I have millions of documents in hundreds of languages where only images of the pages exist, so I'm trying to get a good idea of the contents, then a user can choose to open the document and read the full text in its original format and layout.