iceweasel-oai
8121710ffe
## Summary This PR installs a first wave of WFP (Windows Filtering Platform) filters that reduce the surface area of network egress vulnerabilities for the Windows Sandbox. - Add persistent Windows Filtering Platform provider, sublayer, and filters for the Windows sandbox offline account. - Install WFP filters during elevated full setup, log failures non-fatally, and emit setup metrics when analytics are enabled. - Bump the Windows sandbox setup version so existing users rerun full setup and receive the new filters. ## What WFP is Windows Filtering Platform (WFP) is the low-level Windows networking policy engine underneath things like Windows Firewall. It lets privileged code install persistent filtering rules at specific network stack layers, with conditions like "only traffic from this Windows account" or "only this remote port," and an action like block. In this change, we create a Codex-owned persistent WFP provider and sublayer, then install block filters scoped to the Windows sandbox's offline user account via `ALE_USER_ID`. That means the filters are targeted at sandboxed processes running as that account, rather than globally affecting the host. ## Initial filter set We are starting with 12 concrete WFP filters across a few high-value bypass surfaces. The table below describes the filter families rather than one filter per row: | Area | Concrete filters | Purpose | | --- | --- | --- | | ICMP | 4 filters: ICMP v4/v6 on `ALE_AUTH_CONNECT` and `ALE_RESOURCE_ASSIGNMENT` | Block direct ping-style network reachability checks from the offline account. | | DNS | 2 filters: remote port `53` on `ALE_AUTH_CONNECT_V4/V6` | Block direct DNS queries that bypass our intended proxy/offline path. | | DNS-over-TLS | 2 filters: remote port `853` on `ALE_AUTH_CONNECT_V4/V6` | Block encrypted DNS attempts that could bypass ordinary DNS interception. | | SMB / NetBIOS | 4 filters: remote ports `445` and `139` on `ALE_AUTH_CONNECT_V4/V6` | Block Windows file-sharing/network share traffic from sandboxed processes. | For IPv4/IPv6 coverage, the port-based filters are installed on both `ALE_AUTH_CONNECT_V4` and `ALE_AUTH_CONNECT_V6`. ICMP also gets both connect-layer and resource-assignment-layer coverage because ICMP traffic is shaped differently from ordinary TCP/UDP port traffic. ## Validation - `cargo fmt -p codex-windows-sandbox` (completed with existing stable-rustfmt warnings about `imports_granularity = Item`) - `cargo test -p codex-windows-sandbox wfp::tests` - `cargo test -p codex-windows-sandbox` (fails in existing legacy PowerShell sandbox tests because `Microsoft.PowerShell.Utility` could not be loaded; WFP tests passed before that failure)
Codex CLI (Rust Implementation)
We provide Codex CLI as a standalone 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. If you provide both a prompt argument and piped stdin, Codex appends stdin as a <stdin> block after the prompt so patterns like echo "my output" | codex exec "Summarize this concisely" work naturally. 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 [--log-denials] [COMMAND]...
# Linux
codex sandbox linux [COMMAND]...
# Windows
codex sandbox windows [COMMAND]...
# Legacy aliases
codex debug seatbelt [--log-denials] [COMMAND]...
codex debug landlock [COMMAND]...
To try a writable legacy sandbox mode with these commands, pass an explicit config override such
as -c 'sandbox_mode="workspace-write"'.
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 becomes 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.