Four decorators around an HTTP client, composed in an order that is obvious once and unrecoverable afterwards. Signing inside retry is mandatory — a retried request needs a…
Tests describing what a consumer reads, written by them, run by us. Owning the tests ourselves means asserting what we intended, and the risk is the gap between…
A service-to-service certificate issued by an internal authority in 2022, with a three-year validity nobody had recorded. A certificate with a three-year validity is a reminder set three…
A job constructed with a model, serialised, and executed against a row that had changed in the intervening four minutes. Framework model serialisation re-fetches by identifier, which is…
A module diagram maintained by hand since 2023, compared against the graph the code actually forms. Four edges that do not exist are aspirational and six that are…
An interface added in 2023 against the rule that says not to, and a second implementation in 2025 that vindicated it by accident. The rule about interfaces with…
A textarea that resizes to its content, in one CSS declaration, replacing a script that had been copied between projects since 2016. The lh unit is what makes…
Eight parallel processes, and one test group that writes to a fixed path on disk. Two runs — parallel for everything and serial for the exceptions — is…