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## Why This PR switches the `shell_command` zsh-fork path over to `codex-shell-escalation` so the new shell tool can use the shared exec-wrapper/escalation protocol instead of the `zsh_exec_bridge` implementation that was introduced in https://github.com/openai/codex/pull/12052. `zsh_exec_bridge` relied on UNIX domain sockets, which is not as tamper-proof as the FD-based approach in `codex-shell-escalation`. ## What Changed - Added a Unix zsh-fork runtime adapter in `core` (`core/src/tools/runtimes/shell/unix_escalation.rs`) that: - runs zsh-fork commands through `codex_shell_escalation::run_escalate_server` - bridges exec-policy / approval decisions into `ShellActionProvider` - executes escalated commands via a `ShellCommandExecutor` that calls `process_exec_tool_call` - Updated `ShellRuntime` / `ShellCommandHandler` / tool spec wiring to select a `shell_command` backend (`classic` vs `zsh-fork`) while leaving the generic `shell` tool path unchanged. - Removed the `zsh_exec_bridge`-based session service and deleted `core/src/zsh_exec_bridge/mod.rs`. - Moved exec-wrapper entrypoint dispatch to `arg0` by handling the `codex-execve-wrapper` arg0 alias there, and removed the old `codex_core::maybe_run_zsh_exec_wrapper_mode()` hooks from `cli` and `app-server` mains. - Added the needed `codex-shell-escalation` dependencies for `core` and `arg0`. ## Tests - `cargo test -p codex-core shell_zsh_fork_prefers_shell_command_over_unified_exec` - `cargo test -p codex-app-server turn_start_shell_zsh_fork -- --nocapture` - verifies zsh-fork command execution and approval flows through the new backend - includes subcommand approve/decline coverage using the shared zsh DotSlash fixture in `app-server/tests/suite/zsh` - To test manually, I added the following to `~/.codex/config.toml`: ```toml zsh_path = "/Users/mbolin/code/codex3/codex-rs/app-server/tests/suite/zsh" [features] shell_zsh_fork = true ``` Then I ran `just c` to run the dev build of Codex with these changes and sent it the message: ``` run `echo $0` ``` And it replied with: ``` echo $0 printed: /Users/mbolin/code/codex3/codex-rs/app-server/tests/suite/zsh In this tool context, $0 reflects the script path used to invoke the shell, not just zsh. ``` so the tool appears to be wired up correctly. ## Notes - The zsh subcommand-decline integration test now uses `rm` under a `WorkspaceWrite` sandbox. The previous `/usr/bin/true` scenario is auto-allowed by the new `shell-escalation` policy path, which no longer produces subcommand approval prompts.
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, Team, 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.