b903285746
This is a significant change to how layers of configuration are applied. In particular, the `ConfigLayerStack` now has two important fields: - `layers: Vec<ConfigLayerEntry>` - `requirements: ConfigRequirements` We merge `TomlValue`s across the layers, but they are subject to `ConfigRequirements` before creating a `Config`. How I would review this PR: - start with `codex-rs/app-server-protocol/src/protocol/v2.rs` and note the new variants added to the `ConfigLayerSource` enum: `LegacyManagedConfigTomlFromFile` and `LegacyManagedConfigTomlFromMdm` - note that `ConfigLayerSource` now has a `precedence()` method and implements `PartialOrd` - `codex-rs/core/src/config_loader/layer_io.rs` is responsible for loading "admin" preferences from `/etc/codex/managed_config.toml` and MDM. Because `/etc/codex/managed_config.toml` is now deprecated in favor of `/etc/codex/requirements.toml` and `/etc/codex/config.toml`, we now include some extra information on the `LoadedConfigLayers` returned in `layer_io.rs`. - `codex-rs/core/src/config_loader/mod.rs` has major changes to `load_config_layers_state()`, which is what produces `ConfigLayerStack`. The docstring has the new specification and describes the various layers that will be loaded and the precedence order. - It uses the information from `LoaderOverrides` "twice," both in the spirit of legacy support: - We use one instances to derive an instance of `ConfigRequirements`. Currently, the only field in `managed_config.toml` that contributes to `ConfigRequirements` is `approval_policy`. This PR introduces `Constrained::allow_only()` to support this. - We use a clone of `LoaderOverrides` to derive `ConfigLayerSource::LegacyManagedConfigTomlFromFile` and `ConfigLayerSource::LegacyManagedConfigTomlFromMdm` layers, as appropriate. As before, this ends up being a "best effort" at enterprise controls, but is enforcement is not guaranteed like it is for `ConfigRequirements`. - Now we only create a "user" layer if `$CODEX_HOME/config.toml` exists. (Previously, a user layer was always created for `ConfigLayerStack`.) - Similarly, we only add a "session flags" layer if there are CLI overrides. - `config_loader/state.rs` contains the updated implementation for `ConfigLayerStack`. Note the public API is largely the same as before, but the implementation is quite different. We leverage the fact that `ConfigLayerSource` is now `PartialOrd` to ensure layers are in the correct order. - A `Config` constructed via `ConfigBuilder.build()` will use `load_config_layers_state()` to create the `ConfigLayerStack` and use the associated `ConfigRequirements` when constructing the `Config` object. - That said, a `Config` constructed via `Config::load_from_base_config_with_overrides()` does _not_ yet use `ConfigBuilder`, so it creates a `ConfigRequirements::default()` instead of loading a proper `ConfigRequirements`. I will fix this in a subsequent PR. Then the following files are mostly test changes: ``` codex-rs/app-server/tests/suite/v2/config_rpc.rs codex-rs/core/src/config/service.rs codex-rs/core/src/config_loader/tests.rs ``` Again, because we do not always include "user" and "session flags" layers when the contents are empty, `ConfigLayerStack` sometimes has fewer layers than before (and the precedence order changed slightly), which is the main reason integration tests changed. |
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| .. | ||
| .cargo | ||
| .config | ||
| .github/workflows | ||
| ansi-escape | ||
| app-server | ||
| app-server-protocol | ||
| app-server-test-client | ||
| apply-patch | ||
| arg0 | ||
| async-utils | ||
| backend-client | ||
| chatgpt | ||
| cli | ||
| cloud-tasks | ||
| cloud-tasks-client | ||
| codex-api | ||
| codex-backend-openapi-models | ||
| codex-client | ||
| common | ||
| core | ||
| docs | ||
| exec | ||
| exec-server | ||
| execpolicy | ||
| execpolicy-legacy | ||
| feedback | ||
| file-search | ||
| keyring-store | ||
| linux-sandbox | ||
| lmstudio | ||
| login | ||
| mcp-server | ||
| mcp-types | ||
| ollama | ||
| otel | ||
| process-hardening | ||
| protocol | ||
| responses-api-proxy | ||
| rmcp-client | ||
| scripts | ||
| stdio-to-uds | ||
| tui | ||
| tui2 | ||
| utils | ||
| windows-sandbox-rs | ||
| .gitignore | ||
| Cargo.lock | ||
| Cargo.toml | ||
| clippy.toml | ||
| code | ||
| config.md | ||
| default.nix | ||
| deny.toml | ||
| README.md | ||
| rust-toolchain.toml | ||
| rustfmt.toml | ||
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? Follow the walkthrough in
docs/getting-started.mdfor prompts, keyboard shortcuts, and session management. - Already shipping with Codex and want deeper control? Jump to
docs/advanced.mdand the configuration reference atdocs/config.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.