We went with a

• github-hosted
  • ability to configure actions on push and release within the means of the feature team
  • familiar UI/workflows reduce barrier to entry for all trades (while gerrit's "interface suffers from usability deficits, and its workflow differs from mainstream industry practices")
  • most everyone has credentials already
  • existing 3rd party integrations (e.g. chromatic)
• monorepo
  • reap the benefits of clear package separation while still allowing direct re-use across packages without release (enabled by lerna)
  • synced version numbers of packages (e.g. on tokens and vue-components) on release, c.f. vue-cli, will hopefully help consuming applications (likely using both the component library and design token packages) to keep them aligned
  • needed a name acting as an umbrella led to creation of a new repository instead of re-using "wikibase/vuejs-components" or "wmde/wikit-css/" (a rename would have been due for either, so we decided to keep them for historical purposes instead)

The decision is also documented in this ADR.

There is not much to review here. The ADR already exists, I added what I could think of in the comment above.