Splitting into services enforces nothing if they share a database; splitting into modules with a checked dependency rule enforces more. A build failure on a cross-module import is…
A leading underscore is a convention that anything can ignore; a hash-prefixed field is a syntax error to access from outside. The #field in obj brand check is…
An image scanner identifies packages from manifests, so anything installed by a shell pipe or copied in as a binary is invisible to it. A green scan means…
A deprecation cannot complete without knowing who is still calling, and an aggregate request count answers none of the questions that matter. The client identifier being a bounded…
One call turns on three separate checks that each convert a silent misbehaviour into an exception. The third is the one with the largest immediate yield, because a…
ACL v1 gave one key pattern for all permitted commands; selectors let a user read one prefix and write another. ACL DRYRUN is the command that makes this…
Every application should read and write through an alias rather than an index name, which turns a mapping change from an outage into a swap. The two actions…
A subscriber to your webhooks needs to know how long they have to fix an outage, and the answer is usually undocumented. The total window matters more than…
A CI runner is shared, throttled and occasionally slow, so any assertion about wall-clock time fails eventually for reasons unrelated to the code. Query counts and memory are…