evawong-oai
0156b1e61f
## Summary Make FileSystemSandboxPolicy the semantic source of truth for project root metadata protection. Under writable roots, `.git`, `.codex`, and `.agents` stay protected unless user policy grants an explicit write rule for that metadata path. ## Scope 1. Add `protected_metadata_names` to `WritableRoot`. 2. Teach `FileSystemSandboxPolicy::can_write_path_with_cwd` to reject protected metadata writes under writable roots unless explicitly allowed. 3. Default workspace write profiles to protect `.git`, `.codex`, and `.agents`. 4. Add the Linux fallback setup needed before Linux enforcement lands later in the stack. ## Reviewer Focus 1. The policy decision belongs in FileSystemSandboxPolicy, not shell command parsing. 2. Legacy SandboxPolicy remains a compatibility projection, not the source of the new rule. 3. Explicit user write rules can still opt into these metadata paths. ## Stack 1. Policy primitive: this PR 2. macOS Seatbelt adapter: #19847 3. Shell preflight UX: #19848 4. Runtime profile propagation: #19849 5. Linux bubblewrap adapter: #19852 ## Validation 1. codex protocol permissions tests 2. formatting for codex protocol and codex linux sandbox 3. diff whitespace 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.