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Michael Bolin
feb9eddc51
## Why When unified exec is configured to launch through the zsh fork, local commands should not let the model override the shell binary with the `shell` parameter. The configured zsh fork is the mechanism that makes `execv(2)` interception reliable, so exposing `shell` for local zsh-fork execution would create a confusing API surface and undermine the composition. Remote environments are different: zsh-fork interception is local-only, so remote unified-exec calls must keep direct unified-exec behavior and still expose `shell` when a remote environment can be selected. ## What Changed - Taught the `exec_command` schema builder to omit the `shell` parameter when requested. - Hid `shell` from the unified-exec tool schema only when zsh-fork unified exec applies to all selectable environments. - Kept `shell` visible when any remote environment can be targeted, because those calls run through direct unified exec. - Made unified exec choose the effective shell mode per selected environment: local environments keep zsh-fork mode, remote environments use direct mode. - Left direct unified-exec behavior unchanged, including support for model-specified shells there. ## Verification - Added schema coverage showing `exec_command` can hide `shell`. - Added planner coverage showing zsh-fork unified exec hides `shell` for local-only execution while direct unified exec still exposes it. - Added planner coverage showing `shell` remains visible when a remote environment is available. - Added handler coverage showing remote environments use direct unified-exec shell mode instead of zsh-fork mode. - Ran the focused `codex-core` shell-parameter and zsh-fork tests. --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/openai/codex/pull/24980). * #24982 * #24981 * __->__ #24980
feb9eddc51
·
2026-06-01 20:22:28 +00:00
7,024 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.