hi @dmakweba !
You're right, there's no real description in the playbook repo. It does have the roles included as submodules, but if you don't know that you need to clone the repo recursively, you won't get them. I'll see if I can send @MarcoFargetta_0c9b1 some suggestions for improving this.
In the meantime, you should be able to get everything you need by doing :
git clone --recursive https://github.com/osct/IDPOpenManagement
and then run then
migration.yml playbook. Of course, check the vars in the roles first.