When separator=”\n” Silently Breaks Chunk Overlap in RAG Pipelines
A structural limitation of CharacterTextSplitter In Retrieval-Augmented Generation (RAG) pipelines, chunk overlap is commonly treated as a reliable mechanism to preserve semantic continuity between adjacent chunks. The idea is straightforward: reuse part of the end of one chunk at the beginning of the next to avoid artificial context breaks. However, this assumption does not always…