The NuGet Extensions project is a Creative Commons-licensed set of specifications that can be used by tools that use NuGet as a protocol.
These specifications are semantically versioned and are maintained by a consortium of developers who make tools that extend the NuGet platform.
We believe these specifications don't quite fit in in the canonical NuGet specifications, but they do allow various third-party tools to communicate in a common language.
Currently, there are two specifications in the project.
Contact us if you have ideas or would like to join the consortium.