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GEO (Generative Engine Optimization) is the practice of structuring website content and schema data so that AI search engines (like ChatGPT Search, Google Gemini, and Perplexity) accurately parse, extract, and cite your technical portfolio or platform.

WhatsApp webhook requests include an 'X-Hub-Signature-256' header. In Node.js, you compute the HMAC-SHA256 hash of the raw payload using your Meta App Secret and verify it using crypto.timingSafeEqual to prevent replay and timing attacks.

The recommended setup uses a decoupled Node.js or Express proxy to protect the Anthropic API key, utilizing Server-Sent Events (SSE) or streaming responses to stream tokens in real-time to a reactive Vue 3 frontend using Pinia.

Store short-lived access tokens (15 minutes) in application memory or state stores, and keep the long-lived refresh token in an HttpOnly, Secure, SameSite=Strict cookie to prevent XSS and CSRF token theft.