## Summary - keep the realtime mock websocket open for the handoff steering test after scripted responses - avoid racing the mock server close before the standalone handoff append is observed, which was showing up as a Windows timeout in CI __Details__: Failures in samples seem to be caused by: 1. The mock websocket sends conversation.handoff.requested. 2. The mock immediately closes the websocket because start_websocket_server(...) defaults to close_after_requests: true. 3. On Windows, that close often surfaces as os error 10053 / 10054. 4. The realtime stream shuts down before the routed handoff finishes creating/steering the follow-up request. 5. The test waits for the expected follow-up event and times out. The PR changes only step 2: for this test, the mock websocket stays open after sending the scripted handoff event. The same handoff event is still sent, and the test still asserts the important steering behavior: 1. first Responses request has the original prompt 2. first request does not contain realtime delegation 3. second Responses request does contain the realtime delegation ## Validation - `just fmt` - `just test -p codex-core --test all suite::realtime_conversation::inbound_handoff_request_steers_active_turn` ## Recent CI failures with the same signature - https://github.com/openai/codex/actions/runs/27538033492/job/81392362858 - 2026-06-15, `[codex] update multi-agent v2 prompts` - same test failed after `conversation.handoff.requested`; websocket read failed with `os error 10053` - https://github.com/openai/codex/actions/runs/27543877820/job/81412200651 - 2026-06-15, `feat: dispatch queued user messages through core idle extensions` - same test failed; websocket read failed with `os error 10054` - https://github.com/openai/codex/actions/runs/27544342375/job/81413801641 - 2026-06-15, `[codex] Make marketplace loading capability aware` - same test failed; websocket read failed with `os error 10053`
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.
