Dear Ops,
WMF Legal just launched the developer app guidelines here:
https://wikimediafoundation.org/wiki/Developer_app_guidelines
We wanted to have a link to the guidelines on the dumps page (https://dumps.wikimedia.org/) under the "Legal" section above the Copyright licenses.
The sentence could state:
App Guidelines:
Guidelines for developers on how to properly reuse Wikimedia data, trademarks, and content.
Thanks,
Vickie