Author exact fixture bytes, preserve quoted physical operands, and use local
rsync paths. Inspect the serialized target structurally and make the MSYS
literal-argument fixture explicit without changing production policy.
Provision real POSIX test tools in Windows CI and anchor release-proof test
selectors to actual job headers. Keep existing checks and assertions intact.
Remove one blank between related model-call metadata assignments so the
current target observer composes within the unchanged function-size limit.
