- Empty repository, leaving only a note in the README file.
- Archive Phabricator project for the stuff. (Tool-WMT-bots)
- Edit Phabricator project description, and add link to this ticket.
- Mark the repository read-only in Gerrit, and prefix description with [ARCHIVED] .
- Archive the repo mirror in Phabricator Diffusion. (rTWMT)
- Delete the repo mirror on GitHub.com.
See parent task as for why it should be archived. I don’t have +2 on WMT though.