# Chunking strategies on the same runbook (all-MiniLM-L6-v2, 37 questions)

strategy                                     chunks  meanToks  hit@1  hit@3  hit@5   cut  top3Toks
TokenTextSplitter 128 tokens                     19     114.1  31/37  35/37  36/37     0        335
TokenTextSplitter 64 tokens, minChars=10         42      51.7  27/37  32/37  34/37     1        160
SentenceSplitter 128 tokens, no overlap          20     108.5  24/37  33/37  34/37     0        341
SentenceSplitter 128 tokens, 1 sentence overlap     24     113.5  30/37  33/37  36/37     0        337
SentenceSplitter 64 tokens, no overlap           41      52.8  30/37  34/37  34/37     0        161
one chunk per paragraph                          37      56.4  34/37  36/37  36/37     0        176
one chunk per paragraph + section heading        37      62.7  32/37  35/37  36/37     0        194
one chunk per section (JsoupDocumentReader)      12     178.7  31/37  37/37  37/37     0        529

--- 37 chunks from 36 paragraphs ---
last paragraph chunk: section=12. Decommissioning, text="Helios Operations Runbook - Confidential"

--- what a paragraph chunk with its heading looks like ---
metadata: {chunk_index=2, section=1. Backups and Restore, source=runbook.docx}
text: 1. Backups and Restore\nPoint-in-time recovery is available for the last 7 days. To request a recovery, the service owne