## Why `wait_agent` can be called while mailbox mail is already pending. The previous implementation subscribed for future mailbox sequence changes and then waited for the next notification. If the mail was queued before that wait started, no new notification arrived, so the tool could sit until `timeout_ms` even though mail was ready to deliver. ## What Changed - Added `Session::has_pending_mailbox_items()` for checking pending mailbox mail through the session API. - Updated `multi_agents_v2::wait` to return immediately when pending mailbox mail already exists before sleeping on a new mailbox sequence update. - Reworked the regression coverage in `multi_agents_tests.rs` so already queued mailbox mail must wake `wait_agent` promptly. Relevant code: - [`wait_agent` pending-mail check](https://github.com/openai/codex/blob/aa8ca06e83cf2a3dc22f86f37caec6cc2d9533ea/codex-rs/core/src/tools/handlers/multi_agents_v2/wait.rs#L55-L60) - [`Session::has_pending_mailbox_items`](https://github.com/openai/codex/blob/aa8ca06e83cf2a3dc22f86f37caec6cc2d9533ea/codex-rs/core/src/session/mod.rs#L2979-L2981) - [`multi_agent_v2_wait_agent_returns_for_already_queued_mail`](https://github.com/openai/codex/blob/aa8ca06e83cf2a3dc22f86f37caec6cc2d9533ea/codex-rs/core/src/tools/handlers/multi_agents_tests.rs#L2854) ## Verification - `cargo test -p codex-core multi_agent_v2_wait_agent_returns_for_already_queued_mail`
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.
