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Chris Bookholt
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## Why On Windows, Codex uses a PowerShell safe-command classifier to decide whether a command is read-only enough to run without additional approval. The classifier lowers `EndBlock.Statements` into argv-like command words and checks those words against a safelist. PowerShell can execute code stored elsewhere in the AST. Parameter defaults, named blocks, `using` preambles, and top-level `trap` handlers are not represented in the lowered statement list. Ignoring those regions can make a side-effecting script look like a read-only command. ## What Fail closed whenever a PowerShell script contains executable AST content that the current lowering does not represent. ## How - Return `unsupported` for parameter, dynamic-parameter, begin, process, and clean blocks. - Return `unsupported` for `using module` and `using assembly` preambles. - Return `unsupported` for non-empty `EndBlock.Traps` collections. - Preserve compatibility with Windows PowerShell 5.1 by looking up `CleanBlock` dynamically. - Treat `unsupported` as a failure to prove that the command is safe, routing it through the normal approval path. - Add parser-level and end-to-end regressions for parameter blocks, named blocks, using statements, and trap handlers. This does not make these PowerShell forms invalid or prevent them from running. It prevents automatic safe-command approval when the classifier cannot account for all executable behavior. ## Testing - `just test -p codex-shell-command` - Windows CI exercises the parser and end-to-end safe-command regressions against a real PowerShell installation. --------- Co-authored-by: viyatb-oai <viyatb@openai.com>
27f22b54ae
·
2026-06-23 03:09:20 +00:00
7,714 Commits
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.