DKL — Domain Knowledge Layer

Karsa’s per-domain data cache. Every piece of data fetched or computed during measurement is stored in the DKL, preventing redundant API calls across pipelines. The DKL stores fetched page content, API responses (Knowledge Graph, Wikipedia, Wikidata, PageSpeed), extracted entity summaries, VS probe intelligence, brand profile, latest AS score, and a Signal Profile summary. The Signal Profile is the compact representation of a domain’s measurement state used by the IKL for cross-network analysis.