repoze.zcml is a package which provides basic ZCML directives for the Zope Component Architecture (such as utility, subscriber, and adapter). You should use repoze.zcml if your application doesn't need the more advanced features of the "stock" directive types of the same names present in zope.configuration (e.g. permissions, and trusted adapters/utilities).
Please see docs/index.rst for the documentation.