Document Parsing as the Retrieval Bottleneck

Doulcet's 2024→2026 RAG retrospective: the bottleneck moved out of the model into retrieval, and inside retrieval into parsing — Glantz's 12 pain points cascade parsing→retrieval→synthesis, so one parsing failure lights up 7 of the other 11; reranking and corrective loops turned most pain points into routine engineering, long context did not kill RAG (cost, governance, audit), and what is left is structure loss at ingest — answered with spatial text, Markdown, structure-aligned chunking, and ParseBench