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## Why Permission profiles can mark filesystem entries as unreadable with `deny` rules, including glob patterns. Several shell execution paths treated known-safe commands or execpolicy `allow` rules as sufficient to run outside the filesystem sandbox. That is not valid for read-capable commands: for example, `cat` or `ls` may be reasonable to allow generally, but dropping the sandbox would also drop deny-read constraints such as `**/*.env`. ## What changed - Added a shared check that treats active deny-read restrictions as incompatible with unsandboxed execution. - Kept first-attempt execution sandboxed for explicit escalation and execpolicy allow bypasses when deny-read entries are present. - Prevented no-sandbox retry after a sandbox denial when the active filesystem policy contains deny-read entries. - Updated the zsh-fork execve path so prefix-rule `allow` decisions continue inside the current sandbox when deny-read restrictions are active. ## Verification - `cargo test -p codex-core tools::sandboxing::tests` - `cargo test -p codex-core tools::runtimes::shell::unix_escalation::tests` - `cargo test -p codex-core shell_command_enforces_glob_deny_read_policy`
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
Run the following on Mac or Linux to install Codex CLI:
curl -fsSL https://chatgpt.com/codex/install.sh | sh
Run the following on Windows to install Codex CLI:
powershell -ExecutionPolicy ByPass -c "irm https://chatgpt.com/codex/install.ps1 | iex"
Codex CLI can also be installed via the following package managers:
# 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.