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Abhinav
443f6b831e
# Why Codex currently negotiates MCP `2025-06-18`, where the client elicitation capability is represented as an empty object. We were still serializing `capabilities.elicitation.form`, which belongs to the later capability shape and can cause strict `2025-06-18` servers to reject `initialize` with an unrecognized-field error. This keeps the handshake aligned with the protocol version Codex actually negotiates and fixes the compatibility regression tracked in #17492. # What - Serialize the client elicitation capability as `elicitation: {}` for `2025-06-18`. - Keep elicitation advertised for both Codex Apps and custom MCP servers. - Tighten regression coverage so the unit test asserts both the Rust value and the serialized wire shape. - Add an app-server integration test that round-trips a form elicitation from a custom MCP server; the existing connector round-trip continues to cover the connector path. # Verification - `cargo test -p codex-mcp` - `cargo test -p codex-app-server mcp_server_elicitation_round_trip` - `cargo test -p codex-app-server mcp_server_tool_call_round_trips_elicitation` # Next steps - Decide whether `tool_call_mcp_elicitation=false` should also suppress capability advertisement during `initialize`. - Revisit `form` / `url` capability advertisement when Codex is ready to negotiate MCP `2025-11-25`, which defines that newer shape.
443f6b831e
·
2026-05-01 14:16:22 -07:00
6,089 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.