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## Why The TUI startup test surface had drifted into expensive, brittle coverage: - `tui/tests/suite/no_panic_on_startup.rs` was already ignored as flaky while still spawning a PTY to exercise malformed exec-policy rules. - `tui/tests/suite/model_availability_nux.rs` used a seeded session, cursor-query spoofing, and repeated interrupts to verify a narrow resume-path invariant. - `app/tests.rs` had started accumulating unrelated startup and summary coverage in one flat module even after the surrounding app code was split into feature modules. This keeps those behaviors covered while making the tests cheaper to understand and less likely to rot. It also preserves the malformed-rules regression from #8803 without requiring a terminal orchestration test. ## What changed - Replaced the malformed `rules` startup PTY case with a direct exec-policy loader regression: [`rules_path_file_returns_read_dir_error`](21b6b5622f/codex-rs/core/src/exec_policy_tests.rs (L264-L284)) - Made the existing fresh-session-only startup tooltip behavior explicit with [`should_prepare_startup_tooltip_override`](21b6b5622f/codex-rs/tui/src/app/thread_routing.rs (L1272-L1279)), then added focused coverage for the resume/fork gate and the persisted NUX counter. - Split startup and session-summary coverage out of `tui/src/app/tests.rs` into dedicated modules so the test layout better mirrors the current app architecture. - Converted one single-message goal validation snapshot into semantic assertions where layout was not the behavior under test. - Removed the two PTY-heavy suite files that the narrower tests now supersede. ## Verification - `cargo test -p codex-core rules_path_file_returns_read_dir_error` - `cargo test -p codex-tui startup_` - `cargo test -p codex-tui session_summary_` - `cargo test -p codex-tui goal_slash_command_rejects_oversized_objective`
npm i -g @openai/codex
or brew install --cask codex
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
Install globally with your preferred package manager:
# 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.