The macho check asserted a valid signature for every Mach-O under the studio
home, and failed the macos-15 mask/pipe leg on 29 files: lxml, charset_normalizer,
cygrpc, _upb, fontTools, caio, brotli and a bundled libportaudio.dylib. Those are
MH_BUNDLE and MH_DYLIB images dlopen'd into a process without library validation,
they ship unsigned in the wheels, and the same run had already installed and
imported them with the installer exiting 0.
Key the signature half off the Mach-O filetype and run it only on main
executables. Report an absent seal separately from one that fails to verify, and
capture codesign output instead of piping it into grep, which returned the
unsigned exit status through pipefail and called every unsigned binary broken.
The architecture half is unchanged and still a hard failure: it is what closes
the Rosetta 2 gap. The zero-Mach-O guard is unchanged. The .venv_t5_* sidecars
stay in scope; setup.sh creates them during a normal install and
transformers_version.py puts them on sys.path, so they are payload.
9b0f6d76d4