Enable Basic Nexus Kull and native reactions

docs/RULE_DECISIONS.md

@@ -1,5 +1,13 @@
 # Rule decision index
 
+## Basic native Nexus reactions and Kull — 30 October 2026
+
+Fresh Basic E1/E2 Nexus starts retain native Harkonnen, Ixian and Guild
+reaction initialization even with every selected family seated. The bounded
+CHOAM/classic Nexus Kull preview is now available by default; the existing
+counter and response ordering stays provisional.
+[Scope](NEXUS_CARD_RULES.md#basic-native-nexus-reactions-and-kull--30-october-2026).
+
 ## Basic public Semuta and Nexus — 30 October 2026
 
 Fresh CHOAM-deck Richese Nexus starts compose existing Semuta, CHOAM and