## Why Workspace-specific `AGENTS.md` loading needs to use the selected environment filesystem so remote workspaces and child agents read instructions from their actual environment instead of the host filesystem. The app-server should report the same instruction sources the initialized thread actually loaded, rather than independently rescanning configuration and filesystem state. ## What changed - Introduce `LoadedAgentsMd` to retain ordered user, project, and internal instructions with their provenance. - Load and canonicalize workspace `AGENTS.md` paths through the primary `EnvironmentManager` environment, then render the loaded instructions when constructing turn context. - Expose cached loaded instruction sources from initialized threads and use them for app-server start, resume, and fork responses. - Preserve global `CODEX_HOME` loading and separator behavior while excluding empty project files that did not supply model-visible instructions. - Add integration coverage for CLI injection, selected-environment provenance and rendering, empty environment selection, and cached sources on loaded-thread resume. ## Validation - `just test -p codex-core agents_md` - `just test -p codex-core selected_environment_sources_match_model_visible_instructions` - `just test -p codex-exec agents_md` - `just test -p codex-app-server instruction_sources` - `just test -p codex-app-server --status-level fail`
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.
