panama-command-install-contract matched the literal string
`do "$script"; done`, so it failed the moment that loop gained error
reporting and spanned more than one line -- while the property it exists
to protect, each setup stage running in its own process, was unchanged.
It now checks that property directly: the installer must not source
anything under setup/scripts, and must execute them. Verified it still
catches an installer rewritten to source its stages, which the
first attempt at the replacement did not -- the pattern anchored to the
start of a line, and the sourcing appeared mid-line behind an `if`.
Claude-Session: https://claude.ai/code/session_01BRvzt4H8XXLPVH5MyYdk9L
Gabriel Brown