The goal of opam-rt is to test for regressions in OPAM.
OPAM has already its own test suite but some corner-cases are more easily tested in a more dedicated framework (ie. not a collection of shell scripts, but something well-designed and written in a real programming language).
This is work-in-progress, mainly dedicated to test the new opam update strategy. As it is still the early days, the API will certainly evolve quite quickly.
Any external contribution, as testing ideas or pull request, is most than welcome.