- model, migration, command, job and admin-controller stubs start with
//summer:make <kind>; registry.gen.go keeps its generated-code header
- the registry scan accepts the directive and the older header
- command functions may take one *backpack.App; generatedCommands takes a
variadic app, so plugin.go files calling generatedCommands() still compile
- scaffolded plugins keep the app from Boot and return generatedCommands(p.app)
- make:command notes the nil app for an older plugin.go
- docs, help text and the blog example follow
70e4b4183c