Three review/CI corrections to the install flow:
The compat handshake now runs before the quarantine-clear and launch
block. It is a server-side check unrelated to Gatekeeper, and the
previous ordering let a failed quarantine clear (always the case where
xattr is absent, e.g. Linux CI) skip the handshake entirely.
Reinstalls remove the existing bundle before extraction so the
post-extraction existence check actually proves the fresh bundle
landed; an unremovable bundle aborts install instead of extracting
over it.
Declining the launch prompt now prints the same run-ccs-bar hint as
the non-TTY path instead of ending silently. Install tests inject the
newer deps (clearQuarantine, isBarRunning, promptLaunch) everywhere
the defaults could touch host binaries, keeping results identical on
macOS and Linux runners.