Integrating Artificial Intelligence directly into customer touchpoints has shifted from a novelty to a core competitive requirement. In recent plugin projects like **Blanc Chatbot** and **Blanc Leads**, I engineered bespoke AI RAG (Retrieval-Augmented Generation) systems that bridge knowledge bases directly into interactive widgets. ### Core RAG Plugin Architecture #### 1. Content Ingestion & Chunk Indexing Published WordPress posts, pages, FAQs, and custom docs are extracted, sanitized, and partitioned into semantically relevant text chunks. #### 2. Multi-Provider LLM Router Rather than locking into a single AI model provider, our fallback router automatically routes prompts between: - **Google Gemini 2.5/1.5 Flash**: Lightning-fast, cost-effective context generation. - **OpenAI GPT-4o**: Complex structured reasoning and detailed email drafting. - **Local Ollama**: Privacy-first, zero-data-leakage deployment options for sensitive environments. #### 3. Human-in-the-Loop Safety AI generates suggested next steps, lead scoring (1-100), and personalized email responses, but human administrators retain full review authority before dispatching external communication.