Update this Swift Codex SDK port to match the latest relevant upstream `openai/codex` Python app-server SDK under `sdk/python/src/openai_codex` or the legacy `sdk/python/src/codex_app_server`, then refresh vendored upstream, typed model generation, and recorded metadata. Use when the user asks to sync upstream, bump `vendor/openai-codex`, catch up Python app-server behavior, compare against the v2 app-server schema, or update files like `UPSTREAM.md`, `README.md`, and `CHANGELOG.md` after parity work.
2026-06-07