Fixture 7 ratchet: one campaign across 3 multi-week operational
windows with stable JA3 + HASSH + C2. The production clusterer must
fold all 3 into one cluster despite multi-week silence between
windows; completeness = 1.0.
Time-shift invariance test: applying a +90 day delta to every
session start (and the per-attacker first/last seen) must produce
the same cluster membership as the baseline. This is the runtime
counterpart of the static no-time-fields check on Observation. If
either check ever fails, the clusterer has accidentally grown a
recency-aware edge — fixture 7's whole reason for existing.
anti
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