This notice is being sent to wikitech-l for the benefit of technical
subscribers who aren't subscribed to that list, due to concern that these
changes may affect many API clients. For notification of all breaking
changes to the Action API, please subscribe at
https://lists.wikimedia.org/mailman/listinfo/mediawiki-api-announce.

Error codes for parameter validation errors are changing. Among others,
"noX" becomes "missingparam" and "unknown_X" becomes "badvalue". See the
full announcement at
https://lists.wikimedia.org/pipermail/mediawiki-api-announce/2020-February/000151.html
for details.

Various unusual values for integer-type parameters will no longer be
accepted, basically anything that isn't an optional ASCII sign ('+' or '-')
followed by ASCII digits. See
https://lists.wikimedia.org/pipermail/mediawiki-api-announce/2020-February/000152.html
for details.

Both of these changes will most likely go out to Wikimedia wikis with
1.35.0-wmf.19. See https://www.mediawiki.org/wiki/MediaWiki_1.35/Roadmap
for a schedule.

--
Brad Jorsch (Anomie)
Senior Software Engineer
Wikimedia Foundation
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