extensions/

Details

Valid go.mod file

The Go module system was introduced in Go 1.11 and is the official dependency management solution for Go.
Redistributable license

Redistributable licenses place minimal restrictions on how software can be used, modified, and redistributed.
Tagged version

Modules with tagged versions give importers more predictable builds.
Stable version

When a project reaches major version v1 it is considered stable.
Learn more about best practices

The runtime package is currently restricted to producing code that is usable in both the CLI application(s) and the API application(s).

Code contained in these packages allows the API to use custom versions of global code in the meantime.