Codex-Claude Unison v3.1.1 packaging and repository polish

Codex-Claude Unison v3.1.1 is a packaging and public-repository polish release for the Codex behavior, hooks, and verification layer.

Highlights:

• release archive now includes MIT license text;
• LICENSE.codex-claude-unison is included for installs into other repositories without overwriting host repo licenses;
• Python bytecode caches are excluded from the bundle;
• verifier now detects forbidden packaging artifacts;
• verifier now checks license presence;
• verifier compile checks are non-mutating;
• shell command tokenization is host-independent for Windows CI parity;
• GitHub Actions workflow uses current major actions and cross-platform smoke coverage;
• public docs avoid unsupported historical overclaims.

Archive:

• codex-claude-unison-portable-full-20260517-v3.1.1.zip
• SHA256: ba3843675b18ec54f925cfa20365caa6ce58d502b41086d423104941209937ea

Verification:

• source verifier: pass
• hook fixtures: pass
• installer fixtures: pass
• tool fixtures: pass
• clean archive extract verifier: pass
• GitHub Actions matrix on main: pass on ubuntu-latest, macos-latest, windows-latest with Python 3.9 and 3.12

Native Windows Codex hook runtime should still be verified on a Windows host before claiming full Windows runtime validation.