Michael Bolin
6fcc528a43
As explained in detail in the doc comment for `ParseMode::Lenient`, we have observed that GPT-4.1 does not always generate a valid invocation of `apply_patch`. Fortunately, the error is predictable, so we introduce some new logic to the `codex-apply-patch` crate to recover from this error. Because we would like to avoid this becoming a de facto standard (as it would be incompatible if `apply_patch` were provided as an actual executable, unless we also introduced the lenient behavior in the executable, as well), we require passing `ParseMode::Lenient` to `parse_patch_text()` to make it clear that the caller is opting into supporting this special case. Note the analogous change to the TypeScript CLI was https://github.com/openai/codex/pull/930. In addition to changing the accepted input to `apply_patch`, it also introduced additional instructions for the model, which we include in this PR. Note that `apply-patch` does not depend on either `regex` or `regex-lite`, so some of the checks are slightly more verbose to avoid introducing this dependency. That said, this PR does not leverage the existing `extract_heredoc_body_from_apply_patch_command()`, which depends on `tree-sitter` and `tree-sitter-bash`: https://github.com/openai/codex/blob/5a5aa899143f9b9ef606692c401b010368b15bdb/codex-rs/apply-patch/src/lib.rs#L191-L246 though perhaps it should.
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, though we plan to publish Codex to other package managers soon.
npm i -g @openai/codex@native
codex
You can also download a platform-specific release directly from our GitHub Releases.
Config
Codex supports a rich set of configuration options. See config.md for details.
Model Context Protocol Support
Codex CLI functions as an MCP client that can connect to MCP servers on startup. See the mcp_servers section in the configuration documentation for details.
It is still experimental, but you can also launch Codex as an MCP server by running codex mcp. Using the @modelcontextprotocol/inspector is
npx @modelcontextprotocol/inspector codex mcp
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.