Support group Guild-rate reserve shipments

docs/OPTIONAL_ALLIANCE_VICTORY.md

@@ -1,5 +1,23 @@
 # Optional three-stronghold alliance victory
 
+## Group Guild-rate shipments — 28 October 2026
+
+**Staged Basic prototype, not a selectable game mode.** Guild and both members
+of its group receive the ordinary rounded Guild reserve-shipment rate. When
+that rate changes the price, the original unpaid Karama response resolves
+before movement or payment. If canceled, the declared donor shares stay fixed
+and the shipper must fund the full-price remainder; otherwise the declaration
+returns unused and a replacement uses the full rate. Each payer's contribution
+is routed individually: Guild's own payment goes to the bank, while other
+payments go to Guild. The table quote and minimal bot use the same group rate.
+
+The [publisher rules, p. 19](https://www.gf9games.com/dunegame/wp-content/uploads/Dune-Rulebook.pdf)
+grant the Guild rate to its ally; the [FAQ, p. 7](https://www.gf9games.com/dune/wp-content/uploads/2020/11/Dune-FAQ-Nov-2020.pdf)
+permits Karama to prevent that rate. Applying the benefit and original split
+to both members of a larger group is a provisional composition. Special
+transports, independent purchased rates, optional modules and full group play
+remain separate; no lobby exposes the group option.
+
 ## Group ordinary-bid funding — 28 October 2026
 
 **Staged Basic prototype, not a selectable game mode.** A group member can
@@ -32,9 +50,9 @@ formation, preserved for surviving edges and revoked on departure, with
 aggregated refunds for removed edges. Controls show only the viewer's own
 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, special auctions, and the
+This first path is limited to Basic classic-faction staged groups without
+optional modules, independently purchased Karama shipment pricing or special transport.
+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.