In our quest to get all things into Matrix, we've also sent Salt events into a Matrix room. This is extremely useful to monitor the results of automatic highstate runs, individual commands, etc.
Blog
Post Nagios/Icinga alerts to a Matrix room

We just added Matrix notifications to an old Icinga server we have, because why not? We love having everything in Matrix...
Getting the group into the URL with Purl
The corners of Drupal 8 that aren't there are quickly dwindling, but there are still some that need to get worked out. While upgrading our internal issue tracker, we hit a new one -- getting a group context set via a URL alias, and generally keeping posts within a group.
How do you keep a high bar of quality on dozens of sites every day?
DevOps is the union of development, operations, and quality assurance -- but it's really the other way around.
Building a Membership site in Drupal 8
Memberships are not all the same. Some memberships last a lifetime, others last a year, or a month. Some memberships are for an individual, others for a couple, others for an entire family.
Fixing Drupal 8.3 upgrade issues - TwigExtension, Layouts, and Tweaks
Lots of stuff has been changing in Drupal 8 recently. In 8.3.0, a new experimental "layout discovery" module was added to core, which conflicted with the contrib "layout plugin" module.
Added D8 Rules support to Matrix API
As of today, the Drupal Matrix API module now supports sending messages to a room via Rules. Now you can automatically configure notifications to Matrix rooms without touching any code!
Client accidentally deleted their server. We recovered in less than an hour!
This is why you want to be on our maintenance plans. Our number one priority is recoverability, from just about any risk. And today, we had a client that needed this, in a very bad way!
Added reminders to our Matrix bot
!remind me to respond to Bill in 2 hours
Rolled a SphinxQL Docker container
Yesterday, while assessing a new client site, we ran across a technology we have not seen before: Sphinx Search.
Is your website safe from a cyber attack?
As I write, we're in the midst of a big Ransomware attack. Millions of computers have been infected, with their data encrypted, held ransom pending an extortion payment or deleted. Supposedly.
Recovering old data
A past customer just called, with email trouble... suddenly their email had stopped delivering. This customer had been acquired by another company, and we had shut off their web hosting service months ago, as their website had been retired.