e0ae219f36
Fixes #9501 Contributing guide: https://github.com/openai/codex/blob/main/docs/contributing.md ## Summary The resume picker requires a session_meta line and at least one user_message event within the initial head scan. Some rollout files contain multiple session_meta entries before the first user_message, so the user event can fall outside the default head window and the session is omitted from the picker even though it is resumable by ID. This PR keeps the head summary bounded but extends scanning for a user_message once a session_meta has been observed. The summary still caps stored head entries, but we allow a small, bounded extra scan to find the first user event so valid sessions are not filtered out. ## Changes - Continue scanning past the head limit (bounded) when session_meta is present but no user_message has been seen yet. - Mark session_meta as seen even if the head summary buffer is already full. - Add a regression test with multiple session_meta lines before the first user_message. ## Why This Is Safe - The head summary remains bounded to avoid unbounded memory usage. - The extra scan is capped (USER_EVENT_SCAN_LIMIT) and only triggers after a session_meta is seen. - Behavior is unchanged for typical files where the user_message appears early. ## Testing - cargo test -p codex-core --lib test_list_threads_scans_past_head_for_user_event
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 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, Team, 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.