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OpenAI Refreshes Codex CLI With Fullscreen Terminal Interface and Parallel-Work Controls

September 29, 2026 at 14:21 EDT

Software Dev & Coding
AI Agents

OpenAI has refreshed Codex CLI with a fullscreen terminal interface and workflow controls aimed at developers who want to supervise coding agents from the command line. The shift, spread across late-September releases, turns a previously optional fullscreen transcript into the default experience and adds new affordances for selection, forking, worktrees and background sessions.

September 2026 · OpenAI

Codex CLI becomes a fullscreen agent console

The terminal refresh moves Codex toward a command-center workflow: larger transcripts, cleaner rendering, conversation forking, worktrees and safer background sessions.

late-September release notes in the refresh window

0.157.0

release that enabled fullscreen transcripts by default

default recent managed worktrees kept by Codex

Feature volume stayed high

New-feature bullets listed in the three release notes.

0.156.0

0.157.0

0.158.0

What the new terminal loop enables

Fullscreen transcript

Why developers like it

A larger TUI, cleaner rendering and visible agent state fit developers who already live in the terminal.

Where teams should test

Paste behavior, daemon startup, permissions and worktree setup can vary by platform and project.

The point

Codex CLI is being repositioned from a chat-like helper into a terminal control room for agentic coding, with practical migration checks still part of the story.

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