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## Why `codex-core` currently owns the generic contextual-fragment trait and several reusable fragment implementations. That makes it harder for other crates to share the same host-owned model-input abstraction without depending on all of `codex-core`. This change extracts the reusable fragment machinery into a small `codex-context-fragments` crate so future extension and skills work can depend on the fragment abstraction directly. ## What Changed - Added the `codex-context-fragments` crate with: - `ContextualUserFragment` - `FragmentRegistration` / `FragmentRegistrationProxy` - additional-context fragment types - Moved `SkillInstructions` into `codex-core-skills`, since skill-specific rendering belongs with skills rather than generic core context machinery. - Kept `codex-core` re-exporting the fragment types it still uses internally, so existing call sites keep the same shape. - Updated Cargo and Bazel workspace metadata for the new crate. ## Verification - `cargo metadata --locked --format-version 1 --no-deps` - `just bazel-lock-update` - `just bazel-lock-check`
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.