## Why A [Windows Cargo build](https://github.com/openai/codex/actions/runs/24754807756/job/72425641062) on `main` timed out in several unrelated-looking suites at the same time: - `codex-app-server` account tests failed before account logic, while `mcp.initialize()` was waiting for the first JSON-RPC response. - `codex-core` `apply_patch_cli` tests timed out while running full Codex/apply_patch turns. - `codex-windows-sandbox` legacy session tests timed out while creating restricted-token child processes and private desktops. The app-server log reached the test harness write path in [`McpProcess::initialize_with_params`](https://github.com/openai/codex/blob/731b54d08fb93aec31fb020999a62447886f3ab3/codex-rs/app-server/tests/common/mcp_process.rs#L244-L263), but never printed the matching stdout read from [`read_jsonrpc_message`](https://github.com/openai/codex/blob/731b54d08fb93aec31fb020999a62447886f3ab3/codex-rs/app-server/tests/common/mcp_process.rs#L1123-L1128). The server initialize handler is a small bookkeeping/response path ([`message_processor.rs`](https://github.com/openai/codex/blob/731b54d08fb93aec31fb020999a62447886f3ab3/codex-rs/app-server/src/message_processor.rs#L601-L728)), so the failure looks like Windows runner process/pipe scheduling starvation rather than account-specific behavior. ## What Changed This updates `.config/nextest.toml` to serialize two process-heavy sets: - `codex-core` tests matching `package(codex-core) & kind(test) & test(apply_patch_cli)` - `codex-windows-sandbox` tests matching `package(codex-windows-sandbox) & test(legacy_)` `codex-app-server` integration tests were already serialized inside their own package; this change reduces overlap with the other suites that were saturating the runner at the same time. ## Verification - `cargo nextest list --filterset "package(codex-core) & kind(test) & test(apply_patch_cli)"` - `cargo nextest list --filterset "package(codex-windows-sandbox) & test(legacy_)"` The Windows sandbox filter naturally lists no tests on macOS, but it validates the nextest filter/config syntax locally.
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.
