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## Why #27870 teaches the MCP extension how to discover stdio MCP servers declared by a selected executor plugin, but app-server does not yet install that contributor or initialize its per-thread state. As a result, `thread/start.selectedCapabilityRoots` can select the plugin while its MCP servers remain inactive. This PR closes that app-server wiring gap: ```text thread/start(selectedCapabilityRoots) -> initialize the thread's selected-plugin MCP snapshot -> read the selected plugin's .mcp.json through its environment -> start declared stdio servers in that environment -> expose their tools only on the selected thread ``` ## What changed - Install the selected-executor-plugin MCP contributor in app-server using the existing shared `EnvironmentManager`. - Initialize its frozen thread snapshot when `thread/start` includes selected capability roots. - Document that selected plugin stdio MCPs are activated in their owning environment. - Add an app-server E2E covering the complete selection-to-tool-call path. The E2E verifies that: - the selected MCP process receives an executor-only environment value, proving the tool runs through the selected environment; - the MCP tool is advertised to the model and can be called; - a normal MCP config reload does not discard the thread's frozen selected-plugin registration; - another thread without the selected root does not see the MCP server. ## Scope - Existing sessions without `selectedCapabilityRoots` are unchanged. - Only stdio MCP declarations are activated. HTTP declarations remain inactive. - This does not change selected-root persistence across resume/fork or add hosted-plugin behavior. ## Verification - Focused app-server E2E: `selected_executor_plugin_exposes_its_stdio_mcp_only_to_that_thread` ## Stack Stacked on #27870.
c8c78b63a7
·
2026-06-15 16:23:37 +02:00
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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.