[kinow]

CWL has a loops extension now that can he used for your example of convenging algorithms, https://cwltool.readthedocs.io/en/latest/loop.html

And most workflow systems that support loops/cycles could be used for that too (e.g. Cylc, ecFlow, Prefect, Orchesta/StackStorm, Covenant, etc.).

[epistasis]

Thanks for the CWL pointer; the evaluation of our team either got that one wrong when it was evaluated many years ago, or CWL added it, and in either case it's good to know.