Simple MediaWiki extension for wiki talk signatures with Scratch avatars.
Uses the Scratch 2.0 site API to fetch avatar thumbnail image URLs:
http://scratch.mit.edu/site-api/users/all/{username}/
Installation
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Just drop this folder into MediaWiki's "extensions/" folder, and add
require_once( "$IP/extensions/mw-ScratchSig2/ScratchSig2.php" );
to your "LocalSettings.php".