e84ee33cc0
## Summary - add the guardian reviewer flow for `on-request` approvals in command, patch, sandbox-retry, and managed-network approval paths - keep guardian behind `features.guardian_approval` instead of exposing a public `approval_policy = guardian` mode - route ordinary `OnRequest` approvals to the guardian subagent when the feature is enabled, without changing the public approval-mode surface ## Public model - public approval modes stay unchanged - guardian is enabled via `features.guardian_approval` - when that feature is on, `approval_policy = on-request` keeps the same approval boundaries but sends those approval requests to the guardian reviewer instead of the user - `/experimental` only persists the feature flag; it does not rewrite `approval_policy` - CLI and app-server no longer expose a separate `guardian` approval mode in this PR ## Guardian reviewer - the reviewer runs as a normal subagent and reuses the existing subagent/thread machinery - it is locked to a read-only sandbox and `approval_policy = never` - it does not inherit user/project exec-policy rules - it prefers `gpt-5.4` when the current provider exposes it, otherwise falls back to the parent turn's active model - it fail-closes on timeout, startup failure, malformed output, or any other review error - it currently auto-approves only when `risk_score < 80` ## Review context and policy - guardian mirrors `OnRequest` approval semantics rather than introducing a separate approval policy - explicit `require_escalated` requests follow the same approval surface as `OnRequest`; the difference is only who reviews them - managed-network allowlist misses that enter the approval flow are also reviewed by guardian - the review prompt includes bounded recent transcript history plus recent tool call/result evidence - transcript entries and planned-action strings are truncated with explicit `<guardian_truncated ... />` markers so large payloads stay bounded - apply-patch reviews include the full patch content (without duplicating the structured `changes` payload) - the guardian request layout is snapshot-tested using the same model-visible Responses request formatter used elsewhere in core ## Guardian network behavior - the guardian subagent inherits the parent session's managed-network allowlist when one exists, so it can use the same approved network surface while reviewing - exact session-scoped network approvals are copied into the guardian session with protocol/port scope preserved - those copied approvals are now seeded before the guardian's first turn is submitted, so inherited approvals are available during any immediate review-time checks ## Out of scope / follow-ups - the sandbox-permission validation split was pulled into a separate PR and is not part of this diff - a future follow-up can enable `serde_json` preserve-order in `codex-core` and then simplify the guardian action rendering further --------- Co-authored-by: Codex <noreply@openai.com> |
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| .config | ||
| .github/workflows | ||
| ansi-escape | ||
| app-server | ||
| app-server-protocol | ||
| app-server-test-client | ||
| apply-patch | ||
| arg0 | ||
| artifacts | ||
| async-utils | ||
| backend-client | ||
| chatgpt | ||
| cli | ||
| cloud-requirements | ||
| cloud-tasks | ||
| cloud-tasks-client | ||
| codex-api | ||
| codex-backend-openapi-models | ||
| codex-client | ||
| codex-experimental-api-macros | ||
| config | ||
| core | ||
| debug-client | ||
| docs | ||
| exec | ||
| execpolicy | ||
| execpolicy-legacy | ||
| feedback | ||
| file-search | ||
| hooks | ||
| keyring-store | ||
| linux-sandbox | ||
| lmstudio | ||
| login | ||
| mcp-server | ||
| network-proxy | ||
| ollama | ||
| otel | ||
| package-manager | ||
| process-hardening | ||
| protocol | ||
| responses-api-proxy | ||
| rmcp-client | ||
| scripts | ||
| secrets | ||
| shell-command | ||
| shell-escalation | ||
| skills | ||
| state | ||
| stdio-to-uds | ||
| test-macros | ||
| tui | ||
| utils | ||
| vendor | ||
| windows-sandbox-rs | ||
| .gitignore | ||
| BUILD.bazel | ||
| Cargo.lock | ||
| Cargo.toml | ||
| clippy.toml | ||
| config.md | ||
| default.nix | ||
| deny.toml | ||
| node-version.txt | ||
| 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? 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.
Use codex exec --ephemeral ... to run without persisting session rollout files to disk.
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".
In workspace-write, Codex also includes ~/.codex/memories in its writable roots so memory maintenance does not require an extra approval.
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.
If you want to contribute or inspect behavior in detail, start by reading the module-level README.md files under each crate and run the project workspace from the top-level codex-rs directory so shared config, features, and build scripts stay aligned.