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## Why `McpToolCall` was still an app-server item synthesized from deprecated legacy begin/end events. Recent item migrations moved this ownership into core `TurnItem`s, so MCP tool calls now follow the same canonical lifecycle and leave legacy events as compatibility fanout. Keeping the core item close to the v2 `ThreadItem::McpToolCall` shape also avoids spreading MCP result semantics across app-server conversion code. Core now owns whether a completed call is `completed` or `failed`, and whether the payload is a tool result or an error. ## What changed - Added core `TurnItem::McpToolCall` with flattened `server`, `tool`, `arguments`, `status`, `result`, and `error` fields. - Updated MCP tool call emitters, including MCP resource tools, to emit `ItemStarted`/`ItemCompleted` around directly constructed core MCP items. - Updated app-server v2 conversion to project the core MCP item into `ThreadItem::McpToolCall` without deriving status or splitting `Result` locally. - Ignored live deprecated MCP legacy fanout in app-server v2 to avoid duplicate item notifications, while keeping thread history replay on the legacy event path. ## Verification - `cargo test -p codex-protocol` - `cargo test -p codex-app-server-protocol` - `cargo test -p codex-core --lib mcp_tool_call` - `cargo check -p codex-app-server` - `cargo test -p codex-app-server mcp_tool_call_completion_notification_contains_truncated_large_result`
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.