Topic on Extension talk:GeoCrumbs

The extension does not clearly specify its usage. Can someone add these details?

It says "API" not "user interface" or "tags" so I guess it has to be defined on their website or git.

I am looking for the same information, here a are the further info I have been able to look for:

Developers/Maintainers

https://github.com/wikimedia/mediawiki-extensions-GeoCrumbs

https://github.com/wikimedia/mediawiki-extensions-GeoCrumbs/graphs/contributors

https://phabricator.wikimedia.org/diffusion/EGCR/

https://phabricator.wikimedia.org/tag/geocrumbs/