Support staged group bid funding

docs/OPTIONAL_ALLIANCE_VICTORY.md

@@ -1,5 +1,24 @@
 # Optional three-stronghold alliance victory
 
+## Group ordinary-bid funding — 28 October 2026
+
+**Staged Basic prototype, not a selectable game mode.** A group member can
+allocate separately pledged spice from multiple allies to an ordinary bid.
+Each selected share remains committed while that bid leads and becomes
+withdrawable after an outbid. The winner pays the original donor split once;
+using a Karama instead releases the shares without spending them. The
+ordinary Emperor income and phase-end refunds remain in force. The donor sees
+the amount committed to the current bid, and the bidder sees the combined
+committed payment. Group controls and minimal legal bot decisions are connected
+in staged games.
+
+The [publisher FAQ, p. 2](https://www.gf9games.com/dune/wp-content/uploads/2020/11/Dune-FAQ-Nov-2020.pdf)
+describes allied contributions and the Emperor ally's payment returning to
+Emperor. Recipient-specific escrow and explicit per-donor allocation are
+provisional online procedures. This scope is Basic classic-faction ordinary
+auctions; optional modules, competing Truthtrance commitments, special
+auctions and complete group play remain separate. No lobby exposes group play.
+
 ## Group ordinary-shipment funding — 28 October 2026
 
 **Staged Basic prototype, not a selectable game mode.** Group allies can set
@@ -15,7 +34,7 @@ outgoing and incoming pledges; bots may continue using their own spice.
 
 This first path is limited to Basic classic-faction staged groups without a
 Guild member, optional modules, Karama shipment pricing or special transport.
-Guild-allied rates, other shipment types, group-funded bidding, and the
+Guild-allied rates, other shipment types, special auctions, and the
 remaining faction benefits and interactions are not connected. No lobby can
 start a group game yet. The recipient-specific pledge and allocation procedure
 is a provisional online convention rather than a printed worked example.