When the pipeline stops
A failed build has many possible causes and only some of them are yours. Before debugging a pipeline that worked an hour ago, it is worth ten seconds to check whether the code host or the package registry has declared a problem. GitHub reports Actions, Git operations, the API and Packages separately; npm reports installation and publishing separately.
The opposite check matters as well. If both show no incident, the failure is more likely in your own change, in a pinned dependency or in a credential that expired.
Communication APIs
Twilio is a special case: its status page includes the delivery state of mobile carriers around the world, so it is in a "minor incident" state most of the time. What matters is the incident title, which names the carrier and country. This site collects Twilio's overall state and open incidents and leaves the per-country detail to the official page.