Around the hard core sits a layer of methodological rules that decide what counts as evidence for the programme. These rules are not neutral methodology. They are a protective belt in Lakatos's sense: they exist to keep the hard core testable, and they are openly revisable when the evidence demands it. The hard core is not.
The current belt: evidence-first derivation (convergences produce mechanisms, never the reverse); journal-tier and author-tier gates on what enters the corpus; explicit source-type discrimination between primary, empirical, propagation, and challenge; explicit evidence-quality tagging from replicated through thin; canonical primary sources for every load-bearing claim, with no fallbacks accepted under deadline pressure; and the requirement that every extraction carry a verbatim quote from the actual source text.
Naming the belt openly is the move that distinguishes a research programme from a covert ideology. Lakatos's point: every framework has a protective belt. The honest ones say so.