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## Why Goal idle continuation is extension-triggered model-visible work, so it should follow one core-owned rule for when automatic work may start. In particular, it should not jump ahead of queued user/client work, start while another task is active, or inject a continuation turn while the thread is in Plan mode. Keeping this policy in `try_start_turn_if_idle` avoids passing `collaboration_mode` or review-specific state through `ThreadLifecycleContributor::on_thread_idle`. Active `/review` is covered by the same active-task gate because Review turns are not steerable. ## What Changed - Teach `Session::try_start_turn_if_idle` to reject automatic idle turns in Plan mode, both before reserving an idle turn and after building the turn context. - Document `CodexThread::try_start_turn_if_idle` as the extension-facing gate for automatic idle work, including Plan-mode and active Review-task behavior. - Add focused coverage for Plan-mode rejection and active Review-task rejection without queuing synthetic input. ## Testing - `just test -p codex-core try_start_turn_if_idle`
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.