On December 4, 2023, we will be moving
  the nmfs-stock-synthesis organization over to the NOAA
  Fisheries GitHub Enterprise Cloud (GHEC) account under
  the nmfs-ost organization.
  The nmfs-stock-synthesis repositories and the
    documentation github.io site will be down on December 4th as we
  migrate over to GHEC.
Additionally, the repository names will add ss3 to the
  beginning of each name (e.x. ss3-source-code, ss3-test-models, etc.)
  so that the repos belonging to stock synthesis will be easily
  identifiable under the nmfs-ost org. It will likely take
  us a few days to ensure that all links are updated with the new org
  and repo names, so we appreciate your patience during this time. Come
  December 15th, if you find a link that isn't working, please submit an
  issue and we will promptly fix it.
We ask that you go ahead and update any bookmarks that you have saved
  to the new github org/repo link and to the new github.io site. GitHub does provide an automatic
  redirect when the names of repositories change so you should initially
  still be taken to the new url even using the previous url. We will be
  creating a redirect for the github.io site to allow a similar thing to happen
  with that (though this only persists only for however long we retain
  the old github.io org/repo name).
Please feel free to email nmfs.stock.synthesis@noaa.gov if you have any
  further questions or concerns about the upcoming move to GHEC.