🔐 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.

See also

• byok-custom-model skill — for vendor-key BYOK setup (DIFFERENT mechanism, NOT OAuth)
• config/context/references/model-onboarding.md — overall model-selection landscape

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"