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Codex CLI 0.42.0 release notes
- Version
- 0.42.0
- Released
- Status
- Stable release
What's new in Codex CLI 0.42.0
The official notes for Codex CLI 0.42.0 list 9 changes: 2 new features and 7 other changes.
- 2 new features
- 7 other changes
Highlights
- new feature New responses-api-proxy component to simplify and secure response handling/proxying
- new feature Added secure mode: CODEX_SECURE_MODE=1 to restrict process observability
- other change Experimental Rust SDK–based MCP client introduced
- other change More explicit codex exec events, including item.started and improved output display
- other change Safer command execution: dangerous command checks in core and Windows-specific safety
Our short summary: changes are counted and classified automatically from the official notes, and highlights are shortened. The complete, authoritative list is in the official release notes on GitHub.
Full release notes on GitHub (Codex CLI 0.42.0)
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