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## Why Tool dispatch had two serialization mechanisms: - `supports_parallel_tool_calls` decides whether a tool participates in the shared parallel-execution lock. - `is_mutating` separately gated some calls inside dispatch. That second hook no longer carried its weight. The remaining parallel-support flag is already the per-tool concurrency policy, so keeping a second mutating gate made dispatch harder to follow and left behind extra session plumbing that only existed for that path. ## What changed - Removed `is_mutating` from tool handlers and deleted the `tool_call_gate` path that existed only to support it. - Simplified dispatch and routing to rely on the existing per-tool `supports_parallel_tool_calls` boolean. - Dropped the now-unused handler overrides and related session/test scaffolding. - Kept the router/parallel tests focused on the surviving per-tool behavior. - Removed the unused `codex-utils-readiness` dependency from `codex-core` as a follow-up fix for `cargo shear`. ## Testing - `cargo test -p codex-core parallel_support_does_not_match_namespaced_local_tool_names` - `cargo test -p codex-core mcp_parallel_support_uses_handler_data` - `cargo test -p codex-core tools_without_handlers_do_not_support_parallel`
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.