Topic on Extension talk:Wikibase Client

As I understand it

• Wikibase = awesome technology
• Wikidata = site running that technology to provide millions of facts about items on Wikimedia projects
• Wikibase Client = lighterweight code for other wikis in the cluster that want to use facts from wikidata.

None of this is apparent wondering around

Meanwhile this page has

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but this extension is not obsolete, it's in use on tons of Wikimedia wikis (but not mediawiki.org).

I think

• if you want to develop, check out Extension:Wikibase and follow instructions
• if you want to see how WMF configures the site https://wikidata.wikimedia.org , check out Extension:Wikidata build and wander around in the operations/mediawiki-config repo, primariy in wmf-config/Wikibase.php

I still can't figure out what Wikibase Client is.

I'd guess Wikibase Client is this.

http://comments.gmane.org/gmane.org.wikimedia.wikidata/5353 is related.

Wikibase Client was a separate extension, hosted at https://gerrit.wikimedia.org/r/#/admin/projects/mediawiki/extensions/WikibaseClient. But this separate code repository was abandoned and Wikibase Client became a directory in Extension:Wikibase Repository. The separate documentation on this page is not fully up to date since then. The plan is to separate the two extensions again.