BotForge Uses Four-Tier Parallel RAG Pipeline to Boost AI Query Accuracy
Developers building BotForge, an AI-powered no-code chatbot platform, designed a four-tier retrieval system to handle real-world query challenges like typos, partial phrases, and paraphrased questions. The pipeline runs four strategies simultaneously — semantic vector search using Google's Gemini embeddings, MongoDB Atlas keyword indexing, regex-based partial matching, and Levenshtein distance typo correction. Results from all four strategies are deduplicated and merged using a weighted scoring function to surface the most relevant documents. Running the strategies in parallel via Promise.all keeps end-to-end latency to a median of around 780ms, avoiding the multiplicative cost of sequential execution. The system achieved approximately 90% retrieval accuracy on test queries, with planned improvements including embedding caching and a cross-encoder re-ranking step.
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