Enable paired Ecaz and Moritani Discovery preview

docs/RULE_DECISIONS.md

@@ -1,5 +1,12 @@
 # Rule decision index
 
+## Ecaz and Moritani with Discovery alone — 29 October 2026
+
+The selected E3 pair can use original Discovery without a Nexus or independent
+card prerequisite. The existing paired-arrival storm order remains provisional;
+other module and full-mode limits remain open.
+[Scope](DISCOVERY_PROTOTYPE.md#ecaz-and-moritani-with-discovery-alone--29-october-2026).
+
 ## Great Maker Sneak arrival — 29 October 2026
 
 Great Maker retains its signed reserve arrival while the separately committed