A working pattern library.
“A more granular understanding of who—or what—will access your pattern library can better inform its design, ensuring it’s used by as many people—or products—as possible.”
I believe quite strongly that pattern libraries should be custom and unique for each team, so they reflect the needs of the organization. And thinking about the consumers of your library is part of that, making sure that everyone (and everything) who needs to use it can do so easily.