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## Why `CODEX_RS_SSE_FIXTURE` let integration-style CLI, exec, and TUI tests bypass the normal Responses transport by reading SSE from local files. That kept test-only behavior wired through production client code. The affected tests can stay hermetic by using the existing `core_test_support::responses` mock server and passing `openai_base_url` instead. ## What Changed - Removed the `CODEX_RS_SSE_FIXTURE` flag, `codex_api::stream_from_fixture`, the `env-flags` dependency, and the checked-in SSE fixture files. - Repointed the affected core, exec, and TUI tests at `MockServer` with the existing SSE event constructors. - Removed the Bazel test data plumbing for the deleted fixtures and refreshed cargo/Bazel lock state. ## Verification - `cargo build -p codex-cli` - `cargo test -p codex-api` - `cargo test -p codex-core --test all responses_api_stream_cli` - `cargo test -p codex-core --test all integration_creates_and_checks_session_file` - `cargo test -p codex-exec --test all ephemeral` - `cargo test -p codex-exec --test all resume` - `cargo test -p codex-tui --test all resume_startup_does_not_consume_model_availability_nux_count` - `just bazel-lock-update` - `just bazel-lock-check` - `just fix -p codex-api -p codex-core -p codex-exec -p codex-tui` - `git diff --check`
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.