I was missing an example config.toml, and following docs/config.md alone was slower. I had GPT-5 scan the codebase for every accepted config key, check the defaults, and generate a single example config.toml with annotations. It lists all keys Codex reads from TOML, sets each to its effective default where it exists, leaves optional ones commented, and adds short comments on purpose and valid values. This should make onboarding faster and reduce configuration errors. I can rename it to config.example.toml or move it under docs/ if you prefer.
110 lines
4.6 KiB
Markdown
110 lines
4.6 KiB
Markdown
<p align="center"><code>npm i -g @openai/codex</code><br />or <code>brew install --cask codex</code></p>
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<p align="center"><strong>Codex CLI</strong> is a coding agent from OpenAI that runs locally on your computer.
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</br>
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</br>If you want Codex in your code editor (VS Code, Cursor, Windsurf), <a href="https://developers.openai.com/codex/ide">install in your IDE</a>
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</br>If you are looking for the <em>cloud-based agent</em> from OpenAI, <strong>Codex Web</strong>, go to <a href="https://chatgpt.com/codex">chatgpt.com/codex</a></p>
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<p align="center">
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<img src="./.github/codex-cli-splash.png" alt="Codex CLI splash" width="80%" />
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</p>
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---
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## Quickstart
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### Installing and running Codex CLI
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Install globally with your preferred package manager. If you use npm:
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```shell
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npm install -g @openai/codex
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```
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Alternatively, if you use Homebrew:
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```shell
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brew install --cask codex
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```
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Then simply run `codex` to get started:
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```shell
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codex
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```
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If you're running into upgrade issues with Homebrew, see the [FAQ entry on brew upgrade codex](./docs/faq.md#brew-upgrade-codex-isnt-upgrading-me).
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<details>
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<summary>You can also go to the <a href="https://github.com/openai/codex/releases/latest">latest GitHub Release</a> and download the appropriate binary for your platform.</summary>
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Each GitHub Release contains many executables, but in practice, you likely want one of these:
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- macOS
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- Apple Silicon/arm64: `codex-aarch64-apple-darwin.tar.gz`
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- x86_64 (older Mac hardware): `codex-x86_64-apple-darwin.tar.gz`
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- Linux
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- x86_64: `codex-x86_64-unknown-linux-musl.tar.gz`
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- arm64: `codex-aarch64-unknown-linux-musl.tar.gz`
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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.
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</details>
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### Using Codex with your ChatGPT plan
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<p align="center">
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<img src="./.github/codex-cli-login.png" alt="Codex CLI login" width="80%" />
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</p>
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Run `codex` and select **Sign in with ChatGPT**. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Team, Edu, or Enterprise plan. [Learn more about what's included in your ChatGPT plan](https://help.openai.com/en/articles/11369540-codex-in-chatgpt).
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You can also use Codex with an API key, but this requires [additional setup](./docs/authentication.md#usage-based-billing-alternative-use-an-openai-api-key). If you previously used an API key for usage-based billing, see the [migration steps](./docs/authentication.md#migrating-from-usage-based-billing-api-key). If you're having trouble with login, please comment on [this issue](https://github.com/openai/codex/issues/1243).
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### Model Context Protocol (MCP)
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Codex can access MCP servers. To configure them, refer to the [config docs](./docs/config.md#mcp_servers).
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### Configuration
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Codex CLI supports a rich set of configuration options, with preferences stored in `~/.codex/config.toml`. For full configuration options, see [Configuration](./docs/config.md).
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---
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### Docs & FAQ
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- [**Getting started**](./docs/getting-started.md)
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- [CLI usage](./docs/getting-started.md#cli-usage)
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- [Slash Commands](./docs/slash_commands.md)
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- [Running with a prompt as input](./docs/getting-started.md#running-with-a-prompt-as-input)
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- [Example prompts](./docs/getting-started.md#example-prompts)
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- [Custom prompts](./docs/prompts.md)
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- [Memory with AGENTS.md](./docs/getting-started.md#memory-with-agentsmd)
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- [**Configuration**](./docs/config.md)
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- [Example config](./docs/example-config.md)
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- [**Sandbox & approvals**](./docs/sandbox.md)
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- [**Authentication**](./docs/authentication.md)
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- [Auth methods](./docs/authentication.md#forcing-a-specific-auth-method-advanced)
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- [Login on a "Headless" machine](./docs/authentication.md#connecting-on-a-headless-machine)
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- **Automating Codex**
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- [GitHub Action](https://github.com/openai/codex-action)
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- [TypeScript SDK](./sdk/typescript/README.md)
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- [Non-interactive mode (`codex exec`)](./docs/exec.md)
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- [**Advanced**](./docs/advanced.md)
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- [Tracing / verbose logging](./docs/advanced.md#tracing--verbose-logging)
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- [Model Context Protocol (MCP)](./docs/advanced.md#model-context-protocol-mcp)
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- [**Zero data retention (ZDR)**](./docs/zdr.md)
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- [**Contributing**](./docs/contributing.md)
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- [**Install & build**](./docs/install.md)
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- [System Requirements](./docs/install.md#system-requirements)
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- [DotSlash](./docs/install.md#dotslash)
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- [Build from source](./docs/install.md#build-from-source)
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- [**FAQ**](./docs/faq.md)
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- [**Open source fund**](./docs/open-source-fund.md)
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---
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## License
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This repository is licensed under the [Apache-2.0 License](LICENSE).
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