If you’ve been building RAG systems and something feels off, this post explains why. It picks up where earlier discussions left off and looks at what happens when retrieval stops being something you can inspect or control. The focus is on how teams actually guide AI answers in practice, not by adding more embeddings, but by rethinking retrieval as a first-class part of the system. Along the way, it contrasts vector-heavy approaches with graph-style thinking and introduces the idea of a BM25-based Document RAG Agent as a practical way to regain visibility into how answers are formed.

This topic matters right now because GraphRAG has taken off fast, and for good reason, but many teams are realizing that managing graph schemas, ontologies, and lifecycle rules is a serious commitment. At the same time, pure VectorRAG often feels too fuzzy when correctness and audits matter. The BM25-based Document RAG Agent sits in the middle, borrowing structure from GraphRAG without the full overhead, and grounding retrieval in signals people already understand. As AI systems move from demos to production, especially in regulated or high-risk environments, this kind of tradeoff is becoming a daily decision point for teams trying to ship systems they can explain, debug, and trust.

Dive into the full article here: https://bit.ly/4pz0D3b.