Source at https://git.legoktm.com/ashley/ShoutHow.
It currently supports MW 1.33, so similar to the SemanticMW and MLEB stuff, there will be results for things no longer supported from time to time. But I think it would still be useful to index under "Everything" so that it contributes to results when looking for whether certain use cases exist at all in the third-party landscape.
It can help for cases where something is easy to keep, but also easy to remove if there is no known use case for it. For the same reason, I'd like to index Wikia's monorepo of extensions etc as well. (Will file a separate task).