Codex CLI rust-v0.158.0 introduces several functional improvements to the terminal user interface (TUI) and expanded connectivity options for Model Context Protocol (MCP) servers.
Codex CLI rust-v0.158.0 Release — Enhanced TUI controls and expanded MCP integration
New Features and Improvements
- Enhanced TUI Experience: Users can now configure copy-on-select and right-click paste within the fullscreen TUI. Additionally, copied transcript selections now preserve Markdown formatting.
- Expanded MCP Support: The CLI can now connect to MCP servers requiring pre-registered OAuth client secrets via
codex mcp add --oauth-client-secret. - Security and Connection Enhancements: WebSocket connections to exec-server are now secured with bearer tokens. Furthermore, terminal input approval is enabled by default for commands running with elevated permissions.
- Image Generation Updates: Image generation and editing now allow for explicit requests for transparent backgrounds, and edits can accept conversation images backed by files.
Bug Fixes
- Sandbox and Permissions: Resolved various Windows sandbox failures related to path handling and credential rejection, and fixed Linux sandbox startup issues involving nested writable roots.
- macOS Optimizations: Patch operations now correctly recognize system path aliases, reducing unnecessary approval prompts.
- UI and Rendering: Fixed issues with Mermaid flowchart rendering for quoted labels and ampersands, and addressed TUI responsiveness during clipboard operations.
- Reliability: Improved command completion event reporting and fixed various issues related to Guardian authorization reviews and message ordering.
Sources
- rust-v0.158.0 （2026-09-28）