You can search for identifiers within the package.
in-package search v0.2.0
Opaca quickly sets up a basic project to be used with jbuilder[link?] and topkg[link?]
simply run opaca new 'name' to scaffold a library project, or opaca new 'name' --bin to scaffold an executable project.
opaca new 'name'
opaca new 'name' --bin
It doesn't do much beyond that