Answer Engine Optimization (AEO) skill — optimize content to be cited by AI language models (ChatGPT, Perplexity, Claude, Gemini, Mistral) as authoritative sources. Distinct from SEO (which optimizes for search rankings), AEO optimizes for citation in LLM-generated responses. 3 stdlib Python tools (aeo_audit, aeo_optimizer, citation_tracker), 3 references citing 8 sources each, industry-aware thresholds for 8 industries (saas/healthcare/finance/legal/ecommerce/b2b/media/education). Ported from alirezarezvani/aeo-box.