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## Why This is another small step in the `codex-core` -> `codex-tools` migration described in `AGENTS.md`. `core/src/tools/spec.rs` and `core/src/tools/code_mode/mod.rs` were both hand-rolling the same pure transformation: convert visible `ToolSpec`s into code-mode nested tool definitions, then sort and deduplicate by tool name. That logic does not depend on core runtime state or handlers, so keeping it in `codex-core` makes `spec.rs` harder to peel out later than it needs to be. ## What Changed - Add `collect_code_mode_tool_definitions()` to `codex-rs/tools/src/code_mode.rs`. - Reuse that helper from `codex-rs/core/src/tools/spec.rs` when assembling the `exec` tool description. - Reuse the same helper from `codex-rs/core/src/tools/code_mode/mod.rs` when exposing nested tool metadata to the code-mode runtime. This is intended to be a straight refactor with no behavior change and no new test surface. ## Verification - `cargo test -p codex-tools` - `cargo test -p codex-core tools::spec::tests` - `cargo test -p codex-core code_mode_only_`
npm i -g @openai/codex
or brew install --cask codex
Codex CLI is a coding agent from OpenAI that runs locally on your computer.
If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE.
If you want the desktop app experience, run
codex app or visit the Codex App page.
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex.
Quickstart
Installing and running Codex CLI
Install globally with your preferred package manager:
# Install using npm
npm install -g @openai/codex
# Install using Homebrew
brew install --cask codex
Then simply run codex to get started.
You can also go to the latest GitHub Release and download the appropriate binary for your platform.
Each GitHub Release contains many executables, but in practice, you likely want one of these:
- macOS
- Apple Silicon/arm64:
codex-aarch64-apple-darwin.tar.gz - x86_64 (older Mac hardware):
codex-x86_64-apple-darwin.tar.gz
- Apple Silicon/arm64:
- Linux
- x86_64:
codex-x86_64-unknown-linux-musl.tar.gz - arm64:
codex-aarch64-unknown-linux-musl.tar.gz
- x86_64:
Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.
Using Codex with your ChatGPT plan
Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Team, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.
You can also use Codex with an API key, but this requires additional setup.
Docs
This repository is licensed under the Apache-2.0 License.