T35235 https://phabricator.wikimedia.org/T35235 has been around since 2011, and it's now fixed with the merge of Gerrit change 183315 https://gerrit.wikimedia.org/r/#/c/183315/. For the effects this will have for bots and other API clients, see the announcement on mediawiki-api-announce https://lists.wikimedia.org/pipermail/mediawiki-api-announce/2015-April/000079.html .

For developers, this means that it's much easier to provide formatting for your log entry parameters: it's now *possible* for extensions, and no longer hard-coded in ApiQueryLogEvents for core.

If anyone is looking at updating existing log entries or creating new ones for improved parameter formatting, you should be able to get the general idea from the core formatters I did in that Gerrit change. But don't hesitate to ask me for help if necessary, and please do add me as a reviewer on relevant changesets.

Thanks!