ChatGPT thinks. Codex works. ChatGPT 负责思考，Codex 负责干活。
中文 — ChatGPT 付费订阅的网页版额度大量闲置，Codex 却在消耗紧张的 API 额度做规划和 Review。本项目把"思考"交给你已付费的网页版 ChatGPT， Codex 只负责执行。不用 API Key、不搞逆向代理——官方网页 + 只读 MCP 桥接。
EN — ChatGPT Plus/Pro web quota sits idle while your coding agent burns scarce API/Codex tokens on planning and review. This project moves the thinking to the subscription you already pay for; Codex only executes. No API keys, no reverse proxy — official web UI plus a read-only MCP bridge.
中文 — 把 ChatGPT 网页版变成 Codex 编码会话的"规划与审查大脑"，执行权 完全保留在 Codex 手里。你的仓库永远不会被上传：ChatGPT 通过一条安全的、 OAuth 保护的只读 MCP 连接，按需读取当前工作区里它真正需要的那几行代码。
EN — Use the ChatGPT web app as the planning and review brain for your Codex coding sessions, while Codex keeps full ownership of execution. Your repository is never uploaded: ChatGPT reads exactly the lines it needs through a secure, OAuth-protected, read-only MCP connection to your current workspace.
Detailed docs below are in English · 详细中文文档见 README.zh-CN.md
中文 — 不懂 git、Node、终端？完全不需要懂。把下面这段话原样复制给你的 编码 Agent（Codex），然后去倒杯咖啡：
请帮我完整安装并配置 Codex with ChatGPT，全程自动，我是不懂技术的小白，
所有事情你自己做：
1. 环境自检：需要 git 和 Node.js ≥ 20，缺什么就自动安装
（macOS 用 Homebrew，Windows 用 winget），同时安装 cloudflared。
2. 下载：把 https://github.com/XiaoDuoYa/codex-with-chatgpt 克隆到
~/codex-with-chatgpt（已存在就 git pull 更新）。
3. 构建：在该目录里执行 corepack pnpm install 和 corepack pnpm build。
4. 安装 Skill：把仓库里的 skill/SKILL.md 复制到
~/.codex/skills/codex-with-chatgpt/SKILL.md，并把文件中
"The codex-with-chatgpt checkout lives at:" 那一行的路径改成实际克隆路径。
5. 首次配置：按 SKILL.md 里的 first-time setup 流程执行
（运行 c2c setup，用内置浏览器打开 ChatGPT 配置连接器并输入配对码）。
全程只用内置浏览器，禁止打开任何第三方浏览器。
6. 只有遇到需要我登录（ChatGPT / Cloudflare）、验证码或两步验证时才叫我，
而且一次只告诉我一个动作。
7. 完成后给我看 ✓ 清单，并确认文件读取测试通过。我不懂 MCP、OAuth、
Tunnel、端口这些词，不要向我解释；出了问题先自己修。
EN — Don't know git, Node, or terminals? You don't need to. Copy the paragraph below, paste it to your coding agent (Codex), and go grab a coffee:
Please install and configure "Codex with ChatGPT" for me, fully automatically.
I am a non-technical user — do everything yourself:
1. Check the environment: git and Node.js >= 20 must be available. Install
anything missing yourself (macOS: Homebrew, Windows: winget). Also install
cloudflared.
2. Download: clone https://github.com/XiaoDuoYa/codex-with-chatgpt into
~/codex-with-chatgpt (if it already exists, git pull to update).
3. Build: inside that folder run `corepack pnpm install` then `corepack pnpm build`.
4. Install the Skill: copy skill/SKILL.md to
~/.codex/skills/codex-with-chatgpt/SKILL.md, and update the line
"The codex-with-chatgpt checkout lives at:" to the actual clone path.
5. First-time setup: follow the SKILL.md "first-time setup" workflow
(run c2c setup, configure the ChatGPT connector in the BUILT-IN browser,
enter the pairing code). Never open a third-party browser.
6. Only interrupt me for logins (ChatGPT / Cloudflare), CAPTCHAs or 2FA —
and give me exactly ONE action at a time.
7. When done, show me the ✓ checklist and confirm the file-read test passed.
I don't know what MCP, OAuth, tunnels or ports are. Don't explain them.
If anything breaks, fix it yourself first.
Updates · 更新 — The Skill checks GitHub once a day and updates itself when a new version is released; no action needed. You can also say "更新 Codex with ChatGPT" anytime. / Skill 每天自动检查一次 GitHub，有新版本会自动更新，无需任何操作； 也可以随时对 Codex 说"更新 Codex with ChatGPT"。
The sections below are in English. 以下详细内容为英文，中文完整版见 README.zh-CN.md。
- Install the Codex Skill: copy
skill/to~/.codex/skills/codex-with-chatgpt/. - Tell Codex: "Set up Codex with ChatGPT." (中文: "使用 Codex with ChatGPT 完成首次配置。")
- Use Codex normally: "Use Codex with ChatGPT to implement XXX."
That's the whole manual. You don't need to know what MCP, OAuth, tunnels, ports or localhost are — Codex configures everything automatically and you just see:
Codex with ChatGPT
✓ Project detected
✓ Workspace Bridge started
✓ Secure connection established
✓ ChatGPT connected
✓ File read test passed
Ready.
The only step that may need you: logging into ChatGPT (and nothing else).
┌───────────────────────────┐
│ ChatGPT Web │
│ Reason / Plan / Review │
└──────────┬──────────▲─────┘
│ │
MCP │ │ Computer Use
Data Plane │ │ Control Plane (<1 KB messages)
▼ │
┌─────────────────────┐
│ C2C Bridge │ loopback-only HTTP server
│ read-only MCP │ OAuth 2.1 + one-time pairing code
│ OAuth + Pairing │ Cloudflare Quick Tunnel
│ Tunnel Manager │
└──────────┬──────────┘
│ read-only
▼
┌─────────────────────┐ ┌─────────────────────┐
│ Local Workspace │◀─────────│ Codex Harness │
└─────────────────────┘ edit/git │ shell / tests / fix │
└─────────────────────┘
- Control plane (Computer Use): Codex and ChatGPT exchange tiny structured
[C2C]state messages —INIT → PLAN → EXECUTED → REVIEW → DONE. No diffs, no logs, no file bodies are ever pasted. - Data plane (MCP): ChatGPT pulls what it needs itself through 8 read-only
tools:
workspace_info,list_directory,read_file,search_workspace,git_status,git_diff,test_status,execution_summary. - Independent review: after Codex executes, ChatGPT inspects the actual git diff and test records through MCP — it never trusts "all tests passed" claims blindly.
- Read-only by construction: write/delete/shell/commit tools simply do not exist on the server. No prompt injection can enable them.
- One workspace = one boundary: every token is bound to a single workspace;
path containment uses canonical realpaths (symlink/
..//absolute-path escapes are all blocked and tested). - Sensitive files never leave:
.env*, keys, SSH, credentials are denied by default (.env.exampleallowed);.c2cignoreadds your own rules. - Knowing the URL grants nothing: the public MCP endpoint requires OAuth 2.1 (PKCE S256, dynamic client registration, rotating refresh tokens). Without a token: 401. Wrong workspace: 403.
- The model never sees long-lived credentials: the only secret that ever touches a browser is a one-time pairing code (5-minute TTL, 5 attempts, rate-limited, destroyed on use).
Full threat model: docs/security.md
pnpm install
pnpm build # -> dist/, exposes the `c2c` bin
pnpm test # vitest: 76 tests (path security, OAuth, pairing, MCP e2e)
c2c setup # bridge + tunnel + pairing code, all in one
c2c sandbox-allow # whitelist the settings dir in Codex (macOS + Windows)
c2c status / doctor / pair / unpair / logs / stopRequirements: Node.js >= 20, git. cloudflared for the public connection
(auto-detected; the Skill installs it for you).
Docs: architecture · protocol · security · troubleshooting
src/
bridge/ loopback HTTP server, port recovery, admin API
mcp/ 8 read-only tools, stateless Streamable HTTP
auth/ OAuth 2.1 (PKCE, DCR, refresh rotation, revocation)
pairing/ one-time pairing codes (CSPRNG, TTL, rate limits)
workspace/ path containment, sensitive-file policy, search, git
tunnel/ TunnelProvider abstraction + Cloudflare Quick Tunnel
execution/ execution records for the review loop
process/ daemon lifecycle
cli/ the c2c CLI
skill/ the Codex Skill (the real UX layer)
tests/ unit + integration tests
docs/ architecture / protocol / security / troubleshooting
V1. Verified end-to-end: bridge, OAuth + pairing, public tunnel, ChatGPT connector setup, zero-touch first-run experience.
Unofficial community project. Not affiliated with or endorsed by OpenAI.