codex-with-chatgpt: Offload Codex Planning and Reviews to ChatGPT Web Subscription

You have unused quota on your ChatGPT Plus/Pro web subscription, while Codex burns API credits for planning and reviews. This tool divides roles: 'thinking' happens on the already-paid ChatGPT web interface, and only 'execution' is handled by Codex. It connects the official web UI with a read-only MCP bridge without requiring API key issuance or reverse proxies.

The mechanism is straightforward. Codex and ChatGPT exchange only status messages under 1KB, such as INIT, PLAN, EXECUTED, and REVIEW. Actual code or logs are not transmitted; instead, ChatGPT directly retrieves necessary files or git diffs via eight read-only MCP tools. After execution, ChatGPT independently verifies the actual changes and test records.

The security design defaults to 'write-protected'. The server contains no delete, modify, or shell execution tools, making it impossible to bypass via prompt injection. Each token is bound to a specific workspace, and access to sensitive files like .env or SSH keys is blocked. Authentication is handled using OAuth 2.1 and one-time pairing codes, ensuring that a public URL alone cannot perform any actions.

Installation is completed by copying and pasting installation instructions to the Codex agent. The agent automatically handles everything from installing git, Node.js, and cloudflared to building and configuration. Users only need to perform minimal steps such as logging into ChatGPT or authenticating with Cloudflare. This is an unofficial community project under the MIT license and has no official affiliation with OpenAI.