Chatgpt Codex Onboarding

Lets you connect an existing ChatGPT Plus, Pro, or Team subscription to access gpt-5-codex and related models without needing an API key. It's an OAuth device-code flow: you get a verification URL and code, the user logs into their OpenAI account in a browser, then you poll to finalize. The big gotcha is that the frontend won't show the new models until the user manually refreshes the page, so you have to tell them that explicitly or they'll think it failed. Only use this when someone explicitly says they want to sign in with their ChatGPT subscription. If they mention an API key instead, that's a different setup path entirely.

skills.sh installs: 2.5K
GitHub stars: 32
last updated: Aug 21, 2026

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Install

$ npx -y skills add starchild-ai-agent/official-skills --skill chatgpt-codex-onboarding --agent claude-code

Installs into .claude/skills of the current project.

Files

🔐 ChatGPT / Codex OAuth Onboarding

Use the user's existing ChatGPT or Codex subscription for gpt-5-codex, gpt-5, gpt-5-mini access — without an API key.

This is a script-mode skill — no tools registered. Read this file, then call the exports from a bash block.

When to use this skill

✅ Use when the user EXPLICITLY says one of:

"Sign in with my ChatGPT account"
"Use my Codex subscription"
"Connect my ChatGPT Plus / Pro / Team / Enterprise"
"Login with OpenAI / ChatGPT"

❌ Do NOT use for:

BYOK / API-key-based setup ("Add OpenAI API key", "I have an OpenAI key")
Other vendors that sound similar (Anthropic, Gemini, Qwen, etc.) → use byok-custom-model
"Add the OpenAI model" without subscription context — ASK first whether they want OAuth (subscription) or BYOK (API key)

SKILL.md on GitHub