Parent-Child Retrieval overview

Hierarchical chunk retrieval pipeline that embeds small child chunks for precise similarity matching but returns the larger parent chunk as context. Child chunks (e.g., individual paragraphs) are embedded and searched; when a child matches, the parent chunk (e.g., the full section or page) is returned to provide surrounding context. This pattern improves both retrieval precision (small chunks match better) and generation quality (large context prevents information loss).