## What changed
- Require macOS Desktop app bundles to pass strict `codesign` verification for the Codex bundle identifier and OpenAI signing team.
- Verify downloaded apps before installation and existing apps before launch.
- Add tests that reject unsigned bundles, ad-hoc signatures, and attempts to launch an unsigned existing app.
GitOrigin-RevId: 9b23739281d8abf7fc30c5366960eb1bb07a1b7d