Can I trigger multiple automation programs from a single process? Will there be any issue if the working directory is the same, if I run the programs in parallel?

Should be fine on all accounts. The only thing which might have issues is some languages might have threading issues for running inline programs in parallel.

Thanks Fraser, it seems to be working well (tried 3 .up for different stacks in parallel) The only thing is it spikes memory usage so sometimes my fly.io machine shuts down, will need to dig into that soon. I'm using a

shared-cpu-1x

instance with 1GB memory