run_command() enforces a list[str] argv contract, so a shell parameter
served no purpose beyond keeping an unnecessary shell-injection surface
that a future refactor could re-enable. Remove the parameter (and its
now-dead ValueError guard) so shell=False is the only possible behavior.
Assisted-by: GitHub Copilot (model: Claude Opus 4.8, autonomous)
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 74a1bd02-f6cd-412a-b5a8-a7767a5e058d
run_command() forwarded shell= straight to subprocess.run, so a caller
passing shell=True would invoke a shell. Reject shell=True with ValueError
(keeping the parameter for signature compatibility) and drop shell= from
both subprocess.run calls.
Enable ruff S602/S604/S605 to flag any future shell=True reintroduction,
annotate the one intentional workflow shell sink with # noqa: S602, and
document the shell-step execution risk in workflows/PUBLISHING.md.
