todsacerdotiGitHub's Historic Uptime
Even better IMO is this status page: https://mrshu.github.io/github-statuses/
"The Missing GitHub Status Page" with overall aggregate percentages. Currently at 90.84% over the last 90 days. It was at 90.00% a couple days ago.
It has been pretty rough. Their own numbers report just a single `9` for Actions in Feb 2026 with 98% uptime. But that said -- I don't get the 90% number.
Anecdotally, it seems believable that 1 in 50 times (2%) in Feb that Actions barfed. Which is not very nice, but it wasn't at 1 in 10 times (10%).
It looks like the aggregate stats are more of a venn diagram than an average. So if 1/N services are down, the aggregate is considered down. I don't think this is an accurate way to calculate this. It should be weighted or in some way show partial outages. This belief is derived from the Google SRE book, in particular chapters 3 (embracing risk) and 4 (service level objectives)
I don't use half of the services, the answer is not straight forward