OpenAI Codex CLI

CI-only build tools for native Windows voice releases. These archives are not included in Codex user packages.

• cygwin-build-inputs.tar.gz: 103 pinned Cygwin binary packages and the signed package index used by the offline build installer.
• cygwin-build-sources.tar: all 83 corresponding source package archives at the exact versions named by that index. It includes the upstream source, patches, and build recipes provided in Cygwin's -src packages.
• cygwin-source-map.json: each selected binary package mapped to its source archive and the source size and SHA-512 digest from the pinned index.
• CYGWIN-SOURCE-NOTICE.txt: source access and licensing notice.

The binary and source archive SHA-256 pins live in .github/scripts/voice-cygwin-snapshot.json in the Codex repository. Cygwin describes the licensing terms at https://cygwin.com/licensing.html. Licenses vary by package; consult the corresponding source and binary package archives for their notices.

Install with pip install --upgrade openai-codex==0.154.0 (Python 3.10 or later). This release includes the matching openai-codex-cli-bin==0.154.0 runtime.

• Add max and ultra reasoning-effort values. #39662

• Add ExternalMessage to synchronous and asynchronous run() and turn() calls. External content can start a turn or join an active regular turn with tool-level authority; it does not grant user authorization. Consumers receive independent event streams. #44086

• Add include_turns on resume/fork, turn_service_tier for one newly started turn, and source metadata. History selection changes the returned response, not model context. Existing defaults are preserved when these options are omitted. #44084

• Refresh generated protocol models and notifications, and preserve completion events that arrive before a turn-start response. #44032, #44400

Check these migrations when upgrading: