Asserts is built around the best practices laid out in the SRE Handbook
[https://sre.google/sre-book/table-of-contents/] and uses SAAFE for its
assertion categories extending the Golden Signals
[https://sre.google/sre-book/monitoring-distributed-systems/#xref_monitoring_golden-signals]
described in the handbook. Traditionally Golden Signals have used the Rate,
Errors and
