Use the shared source owner for Mach-O and PyInstaller admission, descriptor and selected-path identity, hashing and cleanup. Retain lipo joining and reader-owned PyInstaller admission, caller cancellation and private PYZ leases. Centralize admission failure projection and remove the superseded PyInstaller wrapper.
Preserve physical identity verification before late hash-completion cancellation. Close an owned source before returning failed initial metadata acquisition and retain the exact handle when close fails. A focused regression failed twice before that fix and now passes.
Validation: fresh runtime build, 259 focused fixture tests, nine documentation checks and all local static/discovery/duplication gates passed. An earlier check also ran four system-lipo suite cases (three read-only native inspections) before the final source fix; those were excluded from subsequent fixture qualification.