Enable paired Ecaz and Moritani Discovery preview

docs/DISCOVERY_PROTOTYPE.md

@@ -1,5 +1,22 @@
 # Discovery functional prototype
 
+## Ecaz and Moritani with Discovery alone — 29 October 2026
+
+**Prototyped / Partial.** A fresh Basic or Advanced preview can select both
+Ecaz and Moritani with Discovery without adding Nexus or the independent Ecaz
+cards. The existing setup supplies the original factions and Discovery
+components. A paired Ambassador/Terror entry uses the existing provisional
+storm-order queue; the original move and payment occur once. Existing faction,
+Discovery, human and minimal bot controls remain in use. Advanced Moritani
+with Harkonnen and unrelated overlays retain their existing boundaries.
+
+Twelve related files pass 77 cases. The focused public-start fixtures exercise
+an actual Discovery Spice Blow and the shared arrival with Duke acquisition and
+Robbery, using controlled unopened Spice order and original token placement.
+Original Tech/Stronghold seat and rules limits have initializer coverage; full
+games, further optional-module and nested-arrival interactions and deployed
+verification remain open.
+
 ## Great Maker and Sneak Attack — 29 October 2026
 
 **Prototyped / Partial.** Great Maker's signed reserve arrival can wait for a