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## Why `Runtime::block_on` executes the top-level future on the caller's OS thread, not on one of Tokio's worker threads. That matters for the interactive CLI because the Tokio runtime already configures larger worker stacks, while the process main thread can still have a smaller platform default stack. This showed up as a `/clear` crash on macOS: starting a fresh TUI thread reloads config, and the stack-heavy TOML deserialization path can overflow before the new session is actually started. ## What Changed - Run the regular `arg0_dispatch_or_else` async entrypoint on a named `codex-main` thread. - Give that thread the same `TOKIO_WORKER_STACK_SIZE_BYTES` stack budget already used for Tokio worker threads. - Keep `Arg0DispatchPaths` and the arg0 alias guard lifetime behavior the same. - Resume panics from the spawned main thread so panic behavior is preserved. ## Verification - `cargo check -p codex-cli` currently fails because the top-level CLI/TUI future is not `Send` under the new thread boundary.
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
Run the following on Mac or Linux to install Codex CLI:
curl -fsSL https://chatgpt.com/codex/install.sh | sh
Run the following on Windows to install Codex CLI:
powershell -ExecutionPolicy ByPass -c "irm https://chatgpt.com/codex/install.ps1 | iex"
Codex CLI can also be installed via the following package managers:
# 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.