Codex CLI v0.159.0 Public — New input steering and enhanced Mermaid rendering

By the editors ／ Model: gemma-4-26b-a4b-it-qat-6bitAs of: 2026-09-29

Codex CLI v0.159.0 has been released, introducing several new features and stability improvements for terminal-based interactions.

New Features and Improvements

Instant Interrupt: An opt-in feature that allows new user input to steer the model during active responses or long-running code-mode calls.
Enhanced Mermaid Rendering: Native support for expanded flowchart edges, labels, and node groups.
UI Enhancements: New sessions now feature a compact welcome screen with consistent headers and periodic usage tips.
Improved Transcript Navigation: Users can now scroll through transcripts while deciding whether to implement a plan.
Improved Clipboard Support: Copying transcript selections now preserves Markdown tables, formatting, and significant whitespace.

Bug Fixes

Windows Stability: Resolved issues where spawning code-mode hosts or MCP servers caused stray console windows.
Session Management: Blank sessions now retain drafts when switching tasks, and threads can be archived before their first turn.
Security and Permissions: Corrected macOS TLS access in network-enabled sandboxes and ensured approved commands retain explicit filesystem denials.
Authentication: Fixed reliable ChatGPT browser sign-in for local app servers.

Sources