Agent IDE — Codex fork for AI-native development environment
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Jörg Thalheim 44ceaf085b
Fix nix build (#4048)
I dropped the build of the old cli from the flake, where the default.nix
already seemed to removed in a previous iterations. Then I updated
flake.nix and codex-rs expression to be able to build again (see
individual commits for details).

Tested by running the following builds:


```
$ nix build .#packages.x86_64-linux.codex-rs
$ nix build .#packages.aarch64-darwin.codex-cli
```

---------

Signed-off-by: Jörg Thalheim <joerg@thalheim.io>
2025-10-17 12:19:08 -07:00
.devcontainer chore: install an extension for TOML syntax highlighting in the devcontainer (#1650) 2025-07-22 10:58:09 -07:00
.github Revert "feat(CI): Allow running rust-release manually and in dry-run mode (#5232)" (#5266) 2025-10-16 21:58:44 +00:00
.vscode chore: add rust-lang.rust-analyzer and vadimcn.vscode-lldb to the list of recommended extensions (#3172) 2025-09-04 10:47:46 -07:00
codex-cli detect Bun installs in CLI update banner (#5074) 2025-10-14 17:49:44 +00:00
codex-rs Fix nix build (#4048) 2025-10-17 12:19:08 -07:00
docs [MCP] Add support for resources (#5239) 2025-10-17 01:05:15 -04:00
scripts chore: introduce publishing logic for @openai/codex-sdk (#4543) 2025-10-01 08:29:59 -07:00
sdk/typescript Remove unused type (#5003) 2025-10-09 10:29:22 -07:00
.codespellignore feat: make it possible to toggle mouse mode in the Rust TUI (#971) 2025-05-16 16:16:50 -07:00
.codespellrc TypeScript SDK scaffold (#4455) 2025-09-29 13:27:13 -07:00
.gitignore feat: agent override file (#5215) 2025-10-15 17:46:01 +01:00
.npmrc chore: migrate to pnpm for improved monorepo management (#287) 2025-04-18 16:25:15 -07:00
.prettierignore [apply-patch] Clean up apply-patch tool definitions (#2539) 2025-08-21 20:07:41 -07:00
.prettierrc.toml Initial commit 2025-04-16 12:56:08 -04:00
AGENTS.md [MCP] Add support for resources (#5239) 2025-10-17 01:05:15 -04:00
CHANGELOG.md Point the CHANGELOG to the releases page (#2780) 2025-08-27 11:45:40 -07:00
cliff.toml bump(version): 0.1.2504251709 (#660) 2025-04-25 17:15:40 -07:00
flake.lock Fix nix build (#4048) 2025-10-17 12:19:08 -07:00
flake.nix Fix nix build (#4048) 2025-10-17 12:19:08 -07:00
LICENSE Initial commit 2025-04-16 12:56:08 -04:00
NOTICE resizable viewport (#1732) 2025-07-31 00:06:55 +00:00
package.json chore: subject docs/*.md to Prettier checks (#4645) 2025-10-03 11:35:48 -07:00
pnpm-lock.yaml Add structured-output support (#4793) 2025-10-05 18:17:50 -07:00
pnpm-workspace.yaml TypeScript SDK scaffold (#4455) 2025-09-29 13:27:13 -07:00
PNPM.md fix: include pnpm lock file (#377) 2025-04-18 17:01:11 -07:00
README.md [MCP] Improve docs (#4811) 2025-10-06 11:43:50 -04:00

npm i -g @openai/codex
or brew install 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 are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex

Codex CLI splash


Quickstart

Installing and running Codex CLI

Install globally with your preferred package manager. If you use npm:

npm install -g @openai/codex

Alternatively, if you use Homebrew:

brew install codex

Then simply run codex to get started:

codex
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
  • Linux
    • x86_64: codex-x86_64-unknown-linux-musl.tar.gz
    • arm64: codex-aarch64-unknown-linux-musl.tar.gz

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

Codex CLI login

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.

You can also use Codex with an API key, but this requires additional setup. If you previously used an API key for usage-based billing, see the migration steps. If you're having trouble with login, please comment on this issue.

Model Context Protocol (MCP)

Codex can access MCP servers. To configure them, refer to the config docs.

Configuration

Codex CLI supports a rich set of configuration options, with preferences stored in ~/.codex/config.toml. For full configuration options, see Configuration.


Docs & FAQ


License

This repository is licensed under the Apache-2.0 License.