Kuba Rogut
Kuba Rogut is a Deployed Engineer at turbopuffer, where he helps customers build semantic and full-text search systems at scale. He has presented AI Engineer/AI Council sessions on adding semantic code search to Claude Code, and previously worked on AI products including SFX Engine.
RAG Is Becoming Agentic Retrieval, Not Disappearing
Kuba Rogut, a deployed engineer at Turbopuffer, argues that claims about RAG’s death rely on defining it as a narrow, one-shot vector search pattern. In his account, retrieval-augmented generation is becoming a broader agentic retrieval system: vector search, full-text search, grep, regex, glob and filters used iteratively by models that keep looking until they have the right context. He points to Cursor’s semantic-search gains and contrasts its upfront indexing with Claude Code’s per-session grep approach to frame embeddings as cached compute whose value depends on reuse.
Semantic Search Cut Claude Code’s Wasted File Reads to One in Eight
Kuba Rogut of Turbopuffer benchmarked Claude Code on 50 ContextBench tasks to test whether it found the right code context, not whether it solved the tasks. He argues that adding semantic search to windowed grep made Claude Code’s file reads much more precise, cutting irrelevant reads from about one in three to one in eight, but did not make semantic retrieval a blanket replacement for grep. In Rogut’s results, semantic search helped when related code shared behavior rather than keywords, while grep remained stronger when the relevant term or import path was explicit.