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Eric Traut
a50cb205b7
## Summary The plugin MCP tool-listing test could hide MCP startup failures by polling `ListMcpTools` until its own 30s deadline. If the plugin MCP server startup had already failed or timed out, the session-owned MCP manager would keep returning an empty tool list, so CI only reported `discovered tools: []` instead of the startup state that mattered. This makes the test synchronize on `McpStartupComplete` for the sample plugin MCP server before asserting listed tools, and gives the Bazel-launched test server a larger startup window. ## Notes Confidence is about 80%. The source path strongly supports the RCA: a failed MCP startup is represented as an empty tool list through `ListMcpTools`, so the old polling contract could not distinguish "not ready yet" from "startup already failed." I could not retrieve the CI execution-log artifact to confirm the exact hidden startup error, but the observed Ubuntu Bazel failure matches this path: repeated `ListMcpTools` responses with no tools until the test-local timeout fired. I think this is the right solution because it keeps plugin behavior unchanged and fixes only the test contract. Future startup failures should now report the `McpStartupComplete` failure/cancellation instead of timing out on an empty tool snapshot. This test was introduced in https://github.com/openai/codex/pull/12864.
a50cb205b7
·
2026-04-23 14:08:40 -07:00
5,745 Commits
npm i -g @openai/codex
or brew install --cask codex
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
Install globally with your preferred package manager:
# 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.