idk, it just seems like a complicated way to run a command in a docker container. i didn't see any ci/cd pipeline actually taking place or how it integrates with all those services.
Except for gitlab, you have to write your on .yaml by hand. I not finished the exporters/generators.
After write your Makefile, integrated with a engine isn't a big problem.
Take a look at .travis.yml, .gitlab-ci.yml, .circleci/config.yml and .github/workflows/main.yml they are very similar and dumb, just call all jobs resolved in Makefile.
The propose is a agnostic pipeline language, that can run in github actions, Jenkins or local.
The makefile is a tool that already is used with this propose.
Makefile is based in local files or folders .PHONY says to make don't looking for this items on project and just run the block of code