Local Codex

Delegate coding tasks to the local OpenAI Codex CLI agent using your ChatGPT Pro subscription (OAuth, no API charges).

When to Use

• User wants to generate, refactor, or review code via Codex
• User wants to run codex exec for non-interactive tasks
• User wants to use Codex's GPT-5.5 agent capabilities
• User mentions "codex", "run codex", "delegate to codex"

Authentication (OAuth / ChatGPT Pro)

CRITICAL: This skill uses OAuth authentication from ~/.codex/auth.json (ChatGPT Pro flat-rate subscription). Do NOT set OPENAI_API_KEY or pass API keys — that would switch to pay-per-use billing.

• Codex desktop app and CLI share the same auth cache
• If auth fails, run codex login in terminal (browser OAuth flow)
• For auth issues, see references/oauth-guide.md