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Extension OAuthAuthentication is MediaWiki extension that allows you to use another wiki as authentication point. The other wiki must be running another different extension Extension:OAuth

The configuration data for this extension is stored in a file called extension.json. This file is using manifest version 1 of JSON file format.

We want convert it to version manifest version 2. You can either do this manually or with the UpdateExtensionJsonSchema PHP script (this is recommended)

You can see examples of the changes needed in this task's description on Phabricator