Gerrit change 152760,[1] likely to be merged in time for 1.24wmf17,[2] will remove the 'props' and 'errors' result properties from the output of action=paraminfo. The format of the former was never clearly specified, and the latter can be extremely difficult to keep updated and will only get worse as more error handling is moved out of the API and into the underlying core code.

Further detail and discussion of this change is at https://www.mediawiki.org/wiki/Requests_for_comment/API_roadmap#Removal_of_c...

[1]: https://gerrit.wikimedia.org/r/#/c/152760/ [2]: https://www.mediawiki.org/wiki/MediaWiki_1.24/Roadmap