## Summary - retry ERS `409 environment_offline` responses inside the existing exec-server recovery loop - keep all other registry conflicts terminal - add focused coverage for both cases ## Root cause When an exec server disconnects and reconnects, the client already starts recovery and calls ERS `/connect`. During the transient executor presence gap, ERS can return `409 environment_offline`. The retry classifier treated every 409 as terminal, so the first response aborted the existing 25-second recovery window before the executor came back online. That then caused active processes to be marked lost. This change classifies only the structured `environment_offline` conflict as retryable. Recovery continues with the existing bounded deadline, exponential backoff, and jitter. ## Validation - `just test -p codex-exec-server client::recovery::tests` — 4 passed - `just fix -p codex-exec-server` — passed - `just fmt` — passed - Full `just test -p codex-exec-server` reached unrelated macOS filesystem-sandbox integration failures because nested `/usr/bin/sandbox-exec` is denied in this environment (`sandbox_apply: Operation not permitted`).
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.
