I would like to share a small handful of methods across recipes in a chef repo. I know that on a cookbook level I can put code in modules in the libraries directory (see relate
You can use a library defined function from another cookbook but you must teach Chef that your cookbook depends on the providing cookbook.
So, for example, if in cookbook A, you have a libraries/default.rb that provides some function f, you can access it from cookbook B so long as B's metadata.rb file includes the line:
depends "A"
See the Chef documentation on metadata and libraries for more details.