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## Why Older sessions can contain model-warning records persisted as `user` messages, including the unified exec process-limit warning, the `apply_patch`-via-`exec_command` warning, and the model-mismatch high-risk cyber fallback warning. Those warnings are no longer produced as conversation history items, but when old sessions compact they should still be recognized as injected context rather than preserved as real user turns. ## What changed - Removed `record_model_warning` and the production paths that emitted these warning messages into conversation history. - Added `LegacyUnifiedExecProcessLimitWarning`, `LegacyApplyPatchExecCommandWarning`, and `LegacyModelMismatchWarning` contextual fragments that are used only for matching old persisted messages. - Registered the legacy fragments with contextual user message detection so compaction filters them through the existing fragment path. - Added focused compaction coverage for old warning messages being dropped during compacted-history processing. ## Testing - `cargo test -p codex-core warning` - `just fix -p codex-core`
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.