Overview of HiKEY
BUILD
documents → trees, auto-parsed
two kinds of index cards
doc cards · section cards
offline, once
TRAVERSE ① Pick Documents
thousands → a few candidates
score = word overlap + semantic sim
target = title + heading paths
X100
Service
FAQ
TRAVERSE ② Pick Sections
candidates → top-K sections
section score = its single best-
matching unit (text·table·figure)
5.3 Battery › table ★
PACK
assemble within budget
key unit + heading path
+ neighboring tables·figures
→ one reader call → answer
zero LLM calls during search · narrowing is pure scoring → cheap and fast
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