New skill: social-graph-ranker
- Weighted social graph traversal with exponential decay across hops
- Bridge Score: B(m) = Σ w(t) · λ^(d(m,t)-1) ranks mutuals by target proximity
- Extended Score incorporates 2nd-order network (mutual-of-mutual connections)
- Final ranking includes engagement bonus for responsive connections
- Runs in parallel with lead-intelligence skill for combined warm+cold outreach
- Supports X API + LinkedIn CSV for graph harvesting
- Outputs tiered action list: warm intros, direct outreach, network gap analysis
Added to business-content install module. Catalog validates: 30/60/140.
