Four places in the repo (the registry, the resolver, the packet renderer and a gate's allowance) cited a
research spec that lives outside the repository, so a reader of the code could not follow the reference.
library/lists/README.md now documents the list as built: how a list is chosen, the registry and its five
lists with their measured counts, where membership is generated, the two tiers (narrowing DOXA's rows,
failing closed; IMB rows per map), the data sources and their terms, and the questions still open. The
four citations point at it.
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