The aarch64 leg ran npm with only cargo added to launchd's PATH, which omits node. Both clean-machine
scripts said every binary runs and only looked for wai-pack and wai-remote-host: each now runs alone
and says its usage. check-wai-release-quickstart.py read a step's lines for the script's path, so an
echo of the path or a `|| true` after it passed; it now requires the script as the line's command,
the step's exit status to be the script's, and the Windows throw after it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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