* See [[mw:Help:CirrusSearch]] for help on how to best use the search functionality (including regex searches).
* https://phabricator.wikimedia.org/diffusion/ECIR/browse/master/CirrusSearch.php
* https://gitphabricator.wikimedia.org/blobdiffusion/mediawiki%2Fextensions%2FCirrusSearch.gitECIR/browse/HEADmaster/README
* https://wikitech.wikimedia.org/wiki/Search