Support selected Nexus decks with leader skills

docs/LEADER_SKILLS_RUNTIME.md

@@ -1,5 +1,17 @@
 # Leader Skills first functional prototype
 
+## Selected Nexus with unused families — 29 October 2026
+
+**Prototyped / Partial.** A fresh Basic or Advanced Nexus table can train
+leaders while using selected expansion decks without independent Ecaz cards,
+even when a selected family has no seated native faction. Existing Skills and
+Nexus controls and physical components remain in use. Ecaz Occupy and Advanced
+Moritani assassination retain their native setup; Advanced Harkonnen with
+Ecaz or Moritani remains guarded. Twelve related files pass 121 cases. Public
+Basic/Advanced starts train leaders, trigger a real Nexus draw and shipment,
+and resolve Discovery with controlled unopened card order. Optional-module
+interactions, complete games and deployed verification remain open.
+
 ## Independent band inventory — 26 October 2026
 
 A bounded delivery inventory finds connected first versions of all28 independent