b4e230f8de
- Added a network sandbox proxy with policy enforcement to better control outbound network access. (#8442) - Introduced the first phase of connectors support via the app server and MCP integration, including new config/docs updates. (#9667) - Shipped collaboration mode as beta in the TUI, with a clearer plan → execute handoff and simplified mode selection (Coding vs Plan). (#9690, #9712, #9802, #9834) - Added ephemeral threads and improved collaboration tool provenance metadata for spawned threads. (#9765, #9769) - WebSocket connections now support proxy configuration. (#9719) ## Bug Fixes - Fixed exec policy parsing for multiline quoted arguments. (#9565) - `--yolo` now skips the git repository check instead of failing outside a repo. (#9590) - Improved resume reliability by handling out-of-order events and prompting for the working directory when it differs. (#9512, #9731) - Backspace no longer deletes a text element when the cursor is at the element’s left edge. (#9630) - Config loading errors are clearer and more actionable across surfaces. (#9746) - Default model selection now respects filtered presets to avoid invalid defaults. (#9782) ## Documentation - Corrected a typo in the experimental collaboration prompt template. (#9716) - Added documentation for the new connectors configuration surface. (#9667) ## Chores - Refreshed the bundled model catalog/presets. (#9726) - Updated GitHub Actions for Node 24 compatibility. (#9722) ## Changelog Full Changelog: https://github.com/openai/codex/compare/rust-v0.89.0...rust-v0.90.0 - #9715 feat: fix formatting of `codex features list` @bolinfest - #9716 Fix typo in experimental_prompt.md @iudizm - #9719 feat: support proxy for ws connection @apanasenko-oai - #9712 TUI: prompt to implement plan and switch to Execute @charley-oai - #9713 use machine scope instead of user scope for dpapi. @iceweasel-oai - #9726 Update models.json @github-actions - #9667 [connectors] Support connectors part 1 - App server & MCP @mzeng-openai - #9674 feat(app-server) Expose `personality` @dylan-hurd-oai - #9733 Change the prompt for planning and reasoning effort @aibrahim-oai - #9730 Hide mode cycle hint while a task is running @charley-oai - #9720 feat: add session source as otel metadata tag @alexsong-oai - #9565 Fix execpolicy parsing for multiline quoted args @jdsalasca - #9745 chore: use some raw strings to reduce quoting @bolinfest - #9753 nit: exclude PWD for rc sourcing @jif-oai - #9690 feat: tui beta for collab @jif-oai - #9116 Persist text element ranges and attached images across history/resume @charley-oai - #9777 plan mode prompt change @aibrahim-oai - #9590 fix(exec): skip git repo check when --yolo flag is used @zerone0x - #9722 Upgrade GitHub Actions for Node 24 compatibility @salmanmkc - #9611 Print warning if we skip config loading @gt-oai - #9782 Select default model from filtered presets @aibrahim-oai - #9512 Fix resume picker when user event appears after head @jdsalasca - #9787 Remove stale TODO comment from defs.bzl @jcoens-openai - #9700 still load skills @gt-oai - #9791 Load untrusted rules @gt-oai - #9707 bundle sandbox helper binaries in main zip, for winget. @iceweasel-oai - #9792 Chore: remove mode from header @aibrahim-oai - #9793 change collaboration mode to struct @aibrahim-oai - #8442 feat: introducing a network sandbox proxy @viyatb-oai - #9802 Have a coding mode and only show coding and plan @aibrahim-oai - #9746 Another round of improvements for config error messages @etraut-openai - #9812 Remove batman reference from experimental prompt @charley-oai - #9769 feat: add thread spawn source for collab tools @jif-oai - #9765 feat: ephemeral threads @jif-oai - #9819 fix: libcc link @jif-oai - #9820 fix: musl build @jif-oai - #9316 fix(windows-sandbox): remove request files after read @MaxMiksa - #9630 Prevent backspace from removing a text element when the cursor is at the element’s left edge @charley-oai - #9840 Revert "fix: musl build" @aibrahim-oai - #9778 Raise welcome animation breakpoint to 37 rows @mzeng-openai - #9731 Ask for cwd choice when resuming session from different cwd @charley-oai - #9841 Revert "fix: libcc link" @aibrahim-oai - #9806 Use collaboration mode masks without mutating base settings @aibrahim-oai - #9834 Mark collab as beta @pakrym-oai - #9847 Revert "Revert "fix: musl build"" @jif-oai - #9855 feat: cap number of agents @jif-oai
Codex CLI (Rust Implementation)
We provide Codex CLI as a standalone, native executable to ensure a zero-dependency install.
Installing Codex
Today, the easiest way to install Codex is via npm:
npm i -g @openai/codex
codex
You can also install via Homebrew (brew install --cask codex) or download a platform-specific release directly from our GitHub Releases.
Documentation quickstart
- First run with Codex? Start with
docs/getting-started.md(links to the walkthrough for prompts, keyboard shortcuts, and session management). - Want deeper control? See
docs/config.mdanddocs/install.md.
What's new in the Rust CLI
The Rust implementation is now the maintained Codex CLI and serves as the default experience. It includes a number of features that the legacy TypeScript CLI never supported.
Config
Codex supports a rich set of configuration options. Note that the Rust CLI uses config.toml instead of config.json. See docs/config.md for details.
Model Context Protocol Support
MCP client
Codex CLI functions as an MCP client that allows the Codex CLI and IDE extension to connect to MCP servers on startup. See the configuration documentation for details.
MCP server (experimental)
Codex can be launched as an MCP server by running codex mcp-server. This allows other MCP clients to use Codex as a tool for another agent.
Use the @modelcontextprotocol/inspector to try it out:
npx @modelcontextprotocol/inspector codex mcp-server
Use codex mcp to add/list/get/remove MCP server launchers defined in config.toml, and codex mcp-server to run the MCP server directly.
Notifications
You can enable notifications by configuring a script that is run whenever the agent finishes a turn. The notify documentation includes a detailed example that explains how to get desktop notifications via terminal-notifier on macOS. When Codex detects that it is running under WSL 2 inside Windows Terminal (WT_SESSION is set), the TUI automatically falls back to native Windows toast notifications so approval prompts and completed turns surface even though Windows Terminal does not implement OSC 9.
codex exec to run Codex programmatically/non-interactively
To run Codex non-interactively, run codex exec PROMPT (you can also pass the prompt via stdin) and Codex will work on your task until it decides that it is done and exits. Output is printed to the terminal directly. You can set the RUST_LOG environment variable to see more about what's going on.
Experimenting with the Codex Sandbox
To test to see what happens when a command is run under the sandbox provided by Codex, we provide the following subcommands in Codex CLI:
# macOS
codex sandbox macos [--full-auto] [--log-denials] [COMMAND]...
# Linux
codex sandbox linux [--full-auto] [COMMAND]...
# Windows
codex sandbox windows [--full-auto] [COMMAND]...
# Legacy aliases
codex debug seatbelt [--full-auto] [--log-denials] [COMMAND]...
codex debug landlock [--full-auto] [COMMAND]...
Selecting a sandbox policy via --sandbox
The Rust CLI exposes a dedicated --sandbox (-s) flag that lets you pick the sandbox policy without having to reach for the generic -c/--config option:
# Run Codex with the default, read-only sandbox
codex --sandbox read-only
# Allow the agent to write within the current workspace while still blocking network access
codex --sandbox workspace-write
# Danger! Disable sandboxing entirely (only do this if you are already running in a container or other isolated env)
codex --sandbox danger-full-access
The same setting can be persisted in ~/.codex/config.toml via the top-level sandbox_mode = "MODE" key, e.g. sandbox_mode = "workspace-write".
Code Organization
This folder is the root of a Cargo workspace. It contains quite a bit of experimental code, but here are the key crates:
core/contains the business logic for Codex. Ultimately, we hope this to be a library crate that is generally useful for building other Rust/native applications that use Codex.exec/"headless" CLI for use in automation.tui/CLI that launches a fullscreen TUI built with Ratatui.cli/CLI multitool that provides the aforementioned CLIs via subcommands.