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## Why Starting a new session should not have to wait for an unchanged stdio MCP server to initialize before its tools can be presented to the model. ## What changed - Cache recent tool catalogs for matching stdio MCP server configurations and use them while a new live connection starts in the background. - Bound the process-wide cache to 32 entries with a 30-minute TTL, and key entries by the server configuration, environment, working directory, and elicitation capabilities that affect the catalog. - Keep connection-specific instructions and tool annotations out of cached catalogs. Resolve tool calls against the live connection so tools that are unavailable or hidden in the new session cannot be invoked from stale data. - Publish only the newest completed catalog fetch and do not cache HTTP servers or stdio configurations that depend on remotely sourced environment values. ## Testing - Add coverage for cache expiration, environment changes, catalog sanitization, and out-of-order refreshes. - Add an end-to-end test that starts inference from cached definitions while a replacement MCP process initializes, then verifies calls and visibility against the live process. GitOrigin-RevId: 2ed0f29ba53ace12532730f951b175c588aa3ae7
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.