servicepack v1.2.22 — slogging v1.7.0 The framework code is untouched: it uses the blank import and never names a handler type. The scaffold's custom-handler example is what changed — slogconf.AddHandler became slogconf.AddSink, in the README and in cmd/init.go's comment. That is the part that mattered. Examples in a scaffold are copied into every generated project, so leaving the removed call would compile here and break each new project downstream. Migrating a generated project: AddHandler -> AddSink, or SetOutput if you meant to replace stdout/stderr rather than add alongside it.