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## Why Codex desktop copies bundled Windows binaries out of `WindowsApps` into a LocalAppData runtime cache before launching `codex.exe`. Sandboxed commands can then need to execute helpers from that cache, but the sandbox user group may not have read/execute access to the runtime bin directory. This makes the Windows sandbox refresh path repair that access directly so the packaged desktop runtime remains usable from sandboxed sessions. ## What changed - Added `setup_runtime_bin` to locate `%LOCALAPPDATA%\OpenAI\Codex\bin`, matching the desktop bundled-binaries destination path, with the same `USERPROFILE\AppData\Local` fallback shape. - During refresh setup, check whether `CodexSandboxUsers` already has read/execute access to the runtime bin directory. - If access is missing, grant `CodexSandboxUsers` `OI/CI/RX` inheritance on that directory. - If the runtime bin directory does not exist, no-op cleanly. ## Verification - `cargo build -p codex-windows-sandbox --bin codex-windows-sandbox-setup` - `cargo test -p codex-windows-sandbox --bin codex-windows-sandbox-setup` - Manual Windows ACL exercise against the installed packaged runtime bin: - existing inherited `CodexSandboxUsers:(I)(OI)(CI)(RX)` no-ops without changing SDDL - after disabling inheritance and removing the group ACE, setup adds `CodexSandboxUsers:(OI)(CI)(RX)` - with `LOCALAPPDATA` pointed at a fake location without `OpenAI\Codex\bin`, setup exits successfully and does not create the directory - restored the real runtime bin with inherited ACLs and confirmed the final SDDL matched the baseline exactly
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.