Demystifying AI: Building a Simple RAG from Scratch Without Frameworks

research#rag📝 Blog|Analyzed: Apr 9, 2026 10:15
Published: Apr 9, 2026 01:12
1 min read
Zenn GenAI

Analysis

This comprehensive tutorial offers a fantastic opportunity for developers to dive deep into the mechanics of Retrieval-Augmented Generation (RAG) by building one entirely from scratch. By intentionally bypassing heavy frameworks like LangChain, readers gain invaluable, foundational insights into the core processes such as indexing and generating. It is an incredibly empowering resource for anyone looking to truly understand the underlying architecture of modern AI tools.
Reference / Citation
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"By intentionally not using frameworks (such as LangChain) and implementing it from scratch, the purpose is to deepen the understanding of the internal processing, since frameworks abstract many processes and make it difficult to grasp what is happening behind the scenes."
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Zenn GenAIApr 9, 2026 01:12
* Cited for critical analysis under Article 32.