ApexCode is an independent open-source engineering control-plane project built on OpenAI Codex.
Status: bootstrap / experimental. ApexCode is not an official OpenAI product and is not endorsed by OpenAI.
- Final review closure v0.1 — owner review pending; no production claim
- Safety Kernel v0.1 — security-reviewed candidate
- Runtime Adapter v0.1 — first real Codex pre-execution policy gate
These documents describe reviewed experimental candidates; they do not claim production readiness or official OpenAI endorsement.
The project focuses on capabilities around Codex rather than replacing its core unnecessarily:
- persistent long-horizon task state
- multi-agent role orchestration
- evidence-driven completion gates
- anti-destructive R0–R5 policy classification
- provider-neutral model routing
- isolated Git worktrees
- browser/application verification
- remote and fleet-aware engineering
- reproducible ApexBench evaluation
ApexCode's core safety principle is:
Agent autonomy may increase. Authority does not automatically increase with it.
Current ApexCode-specific work is intentionally isolated under apexcode/ while integration points are validated. The current foundation is:
apex-policy: risk and authority classificationapex-task-state: persistent long-horizon state and safe transitionsapex-evidence: revision-bound proof and completion gates
These crates do not change upstream Codex runtime behavior.
Project documents:
The content below is retained from the upstream Codex project for compatibility and attribution while ApexCode's integration evolves.
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.
Run the following on Mac or Linux to install Codex CLI:
curl -fsSL https://chatgpt.com/codex/install.sh | shRun the following on Windows to install Codex CLI:
powershell -ExecutionPolicy ByPass -c "irm https://chatgpt.com/codex/install.ps1 | iex"The standalone installers download from https://releases.openai.com/codex by default and fall back to GitHub Releases if a metadata or asset download is unavailable. To force GitHub Releases, set CODEX_INSTALLER_USE_RELEASES_OPENAI_COM to false (0 and no are also accepted):
curl -fsSL https://chatgpt.com/codex/install.sh | CODEX_INSTALLER_USE_RELEASES_OPENAI_COM=false sh$env:CODEX_INSTALLER_USE_RELEASES_OPENAI_COM='false'; irm https://chatgpt.com/codex/install.ps1 | iexCodex CLI can also be installed via the following package managers:
# Install using npm
npm install -g @openai/codex# Install using Homebrew
brew install --cask codexThen 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.
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.
This repository is licensed under the Apache-2.0 License.