Pins down the tier-discipline contract end-to-end:
- Credentials-only overlap doesn't fuse observations (F1 in
miniature).
- ASN-only overlap doesn't fuse observations (F2 in miniature).
- All three weak tiers (medium + low + very-low) stacked still
don't fuse — only a high-tier signal does.
- F1 (shared_wordlist) at identity-level: no false merges, every
row is its own predicted cluster, homogeneity = 1.0.
- F2 (vpn_hopping): 5 distinct ASNs collapse into 1 predicted
cluster, proving JA3 / HASSH dominate ASN as the design
requires.
The combination math itself was wired in commit 5; this commit is
the failure-mode regression suite that gates future tuning of the
tier weights.
anti
6a4592a8f5