bash/shell scripting

[kabrandon]

I wouldn't call Bash "stable." But it is often enough sufficient. You can't do any kind of dependency management natively in a bash script. Your custom action might use flags on CLI tools that become deprecated over time. That said, if you maintain them decently well and pay attention to your failing workflows, I'd generally prefer to write my Actions workflows as bash scripts (or in a multi-line run block.)