Tangled has a nix based workflow engine that looks very similar, if you are into nix and self-hosting runners
https://tangled.org/tangled.org/core/blob/master/docs/spindl...
(no affiliation)
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Blog post about Tangled's CI: https://blog.tangled.org/ci
How does this compare to just running Hydra yourself?
Very cool! Are there any blog posts or articles about Tangled? Docs seem pretty light.