Great tool!
I tried to look at interaction between myself and @Catrope through mediawiki.org, and it displayed the full log, but when I tried to click one of the interaction results, I got "Error ajax error 0"
Looking at the console, the error is CORS:
tools.wmflabs.org/:1 Failed to load https://mediawiki.org/w/api.php?action=compare&fromrev=717092&torelative=prev&formatversion=2&format=json&origin=*&prop=diff|user|ids: Redirect from 'https://mediawiki.org/w/api.php?action=compare&fromrev=717092&torelative=prev&formatversion=2&format=json&origin=*&prop=diff|user|ids' to 'https://www.mediawiki.org/w/api.php?action=compare&fromrev=717092&torelative=prev&formatversion=2&format=json&origin=*&prop=diff|user|ids' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://tools.wmflabs.org' is therefore not allowed access.