Add random faction deal and prediction draft

docs/RULE_DECISIONS.md

@@ -1,5 +1,15 @@
 # Rule decision index
 
+## Faction allocation before setup — 28 October 2026
+
+The supplied revised rulebook, physical p. 4 (printed p. 2), describes random
+faction dealing or descending turn-prediction-number draft order and permits
+swaps. The prototype implements the first two methods in the lobby, retaining
+direct selection and existing start gates. Each faction seat receives its own
+draw in the two-person/four-faction mode; that composition and the automatic
+AI pick are software interpretations. Consensual swaps remain unfinished.
+[Scope](FACTION_ALLOCATION.md).
+
 ## Advanced Voice and ordinary card names — 28 October 2026
 
 The supplied revised Advanced rules, physical p. 28 (printed p. 26), permit a