This concerns anyone deploying code, enabling a banner, or making an edit to site JS (e.g. MediaWiki:Common.js or site-wide gadgets).
When making changes please make sure you check the client error public graph to confirm that the changes haven't introduced errors to our ecosystem.
An alert has also been set up which will fire if more than 3k error events occur within a 5 minute period to the wikimedia-operations channel and email the readers web team. Notifications can be sent to other alerting groups if defined (please ask here).
cc @thcipriani @dduvall @Pcoombe @Esanders @Tgr @Urbanecm @kostajh @santhosh @egardner @Ladsgroup - please communicate to your peers so they know to check during deploys of banners/code. I also suggest setting up a highlight word in IRC for *wikimedia-client-errors-alerts* so that the log spam.