In one of his recent podcasts he explained that he wanted to create a mixture of Google Earth and a libray. So "Library" is specifically meant as a name for the mixed data source aggregation.
To be clear: The entire software is vibecoded in a language Pritlove doesn't even have worked with prior to that. But when it comes to talking about his ideas Pritlove surely does not need a LLM. This guy basically started the German podcast scene and has been talking about software for at least 30 years.