use-package was written by John Wiegley. Its development started in 2012, and it got merged into Emacs in 2022, in preparation of the release of Emacs 29.1.
Dozens of people have contributed to use-package over the years with bug reports, documentation and code. They are too many to list here, but we thank them all for their contributions.
This Texinfo manual was written by Stefan Kangas, as a significant rewrite of the old use-package manual and README.