A local path repository committed by accident, and an install on a machine where the path does not exist. A path repository is the right tool for developing…
A major distribution upgrade, by rebuild, with no changes to the provisioning script at all. A provisioning script that is exercised monthly is a script that works when…
A major version upgrade with no configuration change, on a build that had already been reduced to a proxy declaration. A configuration that has shrunk to one line…
An API key making four hundred requests a day, belonging to nobody we had a record of. A key labelled “test” making four hundred production requests a day…
An hour with a specification, against a week of inferring behaviour from a library’s source. A client library encodes one interpretation of a specification and the parts it…
Six weeks of writing two columns, and a check that they agree. The nightly agreement check is what makes a dual-write window safe, and it caught exactly the…