Enable mixed selected-deck Discovery previews

docs/CURRENT_STATUS.md

@@ -17,6 +17,16 @@ open mode gates.
 
 ## Current checkpoint and work
 
+**Mixed selected-deck Discovery without extra variants — 29 October.
+Prototyped / Partial.** Basic and Advanced previews can select Discovery with
+E3 plus Ix and/or CHOAM without also selecting Nexus or independent cards.
+Selected decks need not all have a seated native faction. Thirteen related
+files pass 82 cases; public-start runtime fixtures exercise Ixian setup and
+shipment, a Discovery blow and the Ecaz/Moritani entry, with controlled unopened
+Spice and token placement. Advanced Moritani/Harkonnen, deeper interactions,
+complete games and deployed verification remain open.
+[Scope](DISCOVERY_PROTOTYPE.md#mixed-selected-deck-discovery-alone--29-october-2026).
+
 **Fresh Richese No-Field on native Homeworld — 29 October. Prototyped /
 Partial.** Advanced Richese can provisionally place a fresh concealed marker on
 its own World for one spice. The native physical reserve pool stays unchanged,

docs/DISCOVERY_PROTOTYPE.md

@@ -1,5 +1,21 @@
 # Discovery functional prototype
 
+## Mixed selected-deck Discovery alone — 29 October 2026
+
+**Prototyped / Partial.** Basic and Advanced previews can use Discovery with
+selected Ecaz/Moritani, Ixians/Tleilaxu and/or CHOAM/Richese decks without
+requiring Nexus or the independent Ecaz cards. A selected deck need not have a
+seated native faction. Existing Tech3+ and Advanced Stronghold prerequisites,
+unrelated overlay restrictions and the Advanced Moritani/Harkonnen boundary
+remain. The Ecaz/Moritani paired arrival retains its provisional storm order;
+its Fremen/Guild Ambassador-created child restrictions are still separate.
+
+Thirteen related files pass 82 cases. Public-start Basic and Advanced fixtures
+exercise original Ixian setup and shipment, an actual Discovery blow, Duke
+acquisition and Robbery with legal bot choices. Unopened Spice order and original
+Ambassador/Terror placement are controlled. Other optional-module interactions,
+complete games and deployed verification remain open.
+
 ## Ecaz and Moritani with Discovery alone — 29 October 2026
 
 **Prototyped / Partial.** A fresh Basic or Advanced preview can select both

docs/RULE_DECISIONS.md

@@ -1,5 +1,12 @@
 # Rule decision index
 
+## Mixed selected-deck Discovery alone — 29 October 2026
+
+Discovery no longer requires Nexus or independent cards when E3 is selected
+alongside Ix and/or CHOAM decks. Existing entry-order interpretations and
+unsupported interaction boundaries remain.
+[Scope](DISCOVERY_PROTOTYPE.md#mixed-selected-deck-discovery-alone--29-october-2026).
+
 ## Fresh native Homeworld No-Field — 29 October 2026
 
 Advanced Richese may provisionally place its fresh marker on its own World for