Guardoc: 46% fewer documentation errors on a two-tier Nova pipeline.

Seven stages: Textract extraction, chunking at clinical boundaries, Titan Text Embeddings V2, patient-partitioned DynamoDB, type/recency pre-filtering, k-NN retrieval, then Nova for classification with source traceability. The cost tiering is the design choice worth stealing: Nova 2 Lite handles text review and filtering, and only final multimodal reasoning over PDF layout and handwriting escalates to Nova Pro. Reported: 46% fewer documentation errors, 70% fewer audit fines, 65% lower litigation exposure, $400K+ annual ROI per facility, 74% reduction in hospital transfers per 100 admissions in one deployment. No latency or token-cost figures published, which is the gap. (AWS)