Last modified: 2014-09-30 01:20:53 UTC
The "Performer" field at Special:Log should support autocompletion.
We don't have a way of querying (through the API) for a list of *all* users beginning with any given string - opensearch will only give us those with existing user pages.
Ignore me, we do - list=allusers does it with auprefix. (Thanks MatmaRex.)
Change 110820 had a related patch set uploaded by Alex Monk: Autocomplete performer field on Special:Log https://gerrit.wikimedia.org/r/110820
Hmm, anons.
Change 110820 merged by jenkins-bot: Implement autocompletion for Performer field on Special:Log https://gerrit.wikimedia.org/r/110820