This package provides a test release for upcoming LaTeX2e
kernel changes. Testing by the LaTeX team itself suggests that
the code is stable and usable, but wider use by knowledgeable
users is desired. The code here is used by TeX systems to
create dedicated formats, for example pdflatex-dev and
lualatex-dev, which can then be used explicitly for testing,
simply by changing your program invocation.

Homepage:
https://ctan.org/pkg/latex-base-dev
