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## Why Fixes #17139. On macOS, runtime diagnostics such as `MallocStackLogging` messages can be written directly to process stderr while the inline TUI owns the terminal. Those bytes paint into the same viewport as the composer without passing through the renderer or composer state, making diagnostic output appear to leak into the input area. ## What Changed - Add a macOS terminal stderr guard while the inline TUI owns the viewport. - Restore stderr when Codex returns terminal ownership for external interactive programs, suspend/resume, panic handling, and normal shutdown. - Add an fd-level regression test that verifies output is suppressed only while terminal ownership is held and restored at each handoff boundary. ## How to Test 1. On macOS, launch the interactive TUI and leave the composer visible. 2. Exercise the workflow that triggers an allocator/runtime stderr diagnostic during an active session, as reported in #17139. 3. Confirm the diagnostic no longer overwrites the active composer region. 4. Suspend or exit the TUI and confirm subsequent terminal stderr output remains visible. The platform diagnostic is environment-dependent, so the deterministic regression check is the new fd-lifecycle test in `tui::terminal_stderr::tests::suppresses_stderr_only_while_terminal_is_owned`. Targeted validation: - `just argument-comment-lint-from-source -p codex-tui` passed. - `just test -p codex-tui` exercised and passed the new stderr-guard regression test. The full invocation currently fails in two unrelated guardian-policy tests, `update_feature_flags_disabling_guardian_clears_review_policy_and_restores_default` and `update_feature_flags_disabling_guardian_clears_manual_review_policy_without_history`, which reproduce when rerun in isolation.
Codex CLI is a coding agent from OpenAI that runs locally on your computer.
If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE.
If you want the desktop app experience, run
codex app or visit the Codex App page.
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex.
Quickstart
Installing and running Codex CLI
Run the following on Mac or Linux to install Codex CLI:
curl -fsSL https://chatgpt.com/codex/install.sh | sh
Run the following on Windows to install Codex CLI:
powershell -ExecutionPolicy ByPass -c "irm https://chatgpt.com/codex/install.ps1 | iex"
Codex CLI can also be installed via the following package managers:
# Install using npm
npm install -g @openai/codex
# Install using Homebrew
brew install --cask codex
Then simply run codex to get started.
You can also go to the latest GitHub Release and download the appropriate binary for your platform.
Each GitHub Release contains many executables, but in practice, you likely want one of these:
- macOS
- Apple Silicon/arm64:
codex-aarch64-apple-darwin.tar.gz - x86_64 (older Mac hardware):
codex-x86_64-apple-darwin.tar.gz
- Apple Silicon/arm64:
- Linux
- x86_64:
codex-x86_64-unknown-linux-musl.tar.gz - arm64:
codex-aarch64-unknown-linux-musl.tar.gz
- x86_64:
Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.
Using Codex with your ChatGPT plan
Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Business, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.
You can also use Codex with an API key, but this requires additional setup.
Docs
This repository is licensed under the Apache-2.0 License.