- setup/gateway stages run under a real controlling terminal; with none
(curl | bash, Docker builds) they are skipped rather than failed.
- The repository-failure frame fixture has a commit; a commitless checkout
is an interrupted clone that gets re-cloned from the network.
- The unmerged-index fixture merges with an explicit identity; CI has no
git identity, so the merge never started and no conflict existed.
- The ps1 Python stage expects --no-registry on uv python install.
- pm/native_build.py finds PowerShell on the environment's own PATH, as
pm/shell.py does for bash; allowlisted alongside it.
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