Mutual-Follow Analyzer
Define a list L, scan each member's following, rank
candidates by in-degree inside L.
Create a new list ↓
contacts_filter + {"is_decision_maker": true, "limit": 1500} pulls
from contacts.person. handle_list + {"handles": ["vitalik", "@haydenz"]}
is ad-hoc. Run peoplefinder mfa list-materialize --name <name> after creation
to populate mfa.list_member.
no lists yet — run peoplefinder mfa list-create