This is cool. I've been looking for something like this to pair with my nix env. Docker makes process management and logging in the dev environment so easy, but between the performance issues and abstraction leaks when jumping back and forth between native containers on linux and virtual machines on macos we gave up and started using nix to handle the reproducibility of our dev environment. The only thing I miss is the ease of process/service/log management. If anyone has any other solutions I would love to hear them.

Btw, there's a large number of tools that use the Procfile file format, including what appears to be the original one, written in Ruby https://github.com/ddollar/foreman (the readme has links to a partial list of foreman clones)

But I agree that overmind is the best of the bunch