Requests made by the TermboxRemoteRenderer should include information in the UserAgent about:

• The version of MediaWiki
• The version of Wikibase
• The version of Termbox (could be taken e.g. as the commit of the submodule or as the version from package.json)
• The version of PHP Runtime
• (the id of the initial request to mediawiki)
• Whether the request is called out to Curl or uses PHP