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## Why Plugin-install preflight and the actual OAuth login flow used different discovery implementations. Preflight had a Codex-specific implementation that only queried authorization-server metadata on the MCP host, while login already used the upstream `rmcp` Rust MCP SDK. As a result, servers that advertise a separate authorization server through RFC 9728 Protected Resource Metadata were classified as OAuth-unsupported during plugin installation, so login was skipped. ## What changed - delegate plugin-install OAuth discovery to `rmcp::transport::AuthorizationManager`, the same implementation used by the login flow - let `rmcp` follow Protected Resource Metadata first and perform direct RFC 8414 authorization-server discovery when protected-resource discovery does not yield usable metadata - retain Codex's existing HTTP headers, timeout, `no_proxy` behavior, and scope normalization around that discovery - add unit coverage and a pure-MCP plugin-install integration test that proves the protected-resource path reaches OAuth client registration This only changes shared MCP OAuth discovery. App declarations and `appsNeedingAuth` behavior are unchanged. ## Verification - `just test -p codex-rmcp-client auth_status` - `just test -p codex-app-server plugin_install_starts_mcp_oauth` - real plugin-install smoke test with an isolated `CODEX_HOME`: both DigitalOcean MCP servers started OAuth callback listeners, while Linear continued to start its existing direct-discovery OAuth flow
4e6bc42266
·
2026-06-18 21:17:20 -07:00
7,631 Commits
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.