I see it might be handy for exploring your own pipelines (and so are things like https://github.com/akavel/up/ ) , but I advise against using this for any serious project management. Nontrivial and/or crucial code-blocks in markdown files is an anti-pattern.
Once i find I'm re-using code from my markdown notes, I make it a script in ${dotfiles}/bin or in ${project}/scripts and put related docs in there. This feels like the inverse of this tool's imposed workflow and has the upside of composability of tools.
Then use something like a makefile to call these tools/scripts behind generic phony targets (or you can roll your own 'project.sh' entry point script if really needed). It then becomes just `make release`. it is portable already and does not add yet another host dependency on everybody nor a fricking javascript engine.
ps1: Same goes for weird stuff like https://pypi.org/project/taskipy/ . use `make release` over `poetry run task release`
ps2: if you're copy/pasting-workflow sucks: improve it. vim has :Terminal, it has yank-to-clipoard etc.