a52c91d8b5
## Why `code_mode_only_guides_all_tools_search_and_calls_deferred_app_tools` was failing because code-mode prompt generation used the same nested tool spec list for both the model-visible `exec` guide and the runtime `ALL_TOOLS` surface. That allowed deferred MCP/app tools, such as `calendar_timezone_option_99`, to leak into the `exec` description even though they should only be discoverable through `ALL_TOOLS` at runtime. ## What changed Split code-mode nested tool planning into two sets in `core/src/tools/spec_plan.rs`: - runtime nested tool specs still include deferred tools, so `tools[...]` and `ALL_TOOLS` can call them - `exec` prompt docs only render non-deferred tools, so deferred app tools stay out of the model-visible guide ## Validation - `cargo test -p codex-core --test all code_mode_only_guides_all_tools_search_and_calls_deferred_app_tools -- --nocapture` - looped the same focused test 5 additional times with `cargo test -q -p codex-core --test all code_mode_only_guides_all_tools_search_and_calls_deferred_app_tools`
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, Business, 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.