Support group departures in joint commitment plans

docs/OPTIONAL_ALLIANCE_VICTORY.md

@@ -1,5 +1,18 @@
 # Optional three-stronghold alliance victory
 
+## Group admission with joint commitments — 29 October 2026
+
+**Staged Basic prototype, not a selectable game mode.** The joint
+turn-action planner recognizes an existing group and can quote the member's
+own departure. Pending invitations pause joint reconciliation while departure
+is unavailable. Admission checks a detached completed group against the
+participant's combined accepted payment and travel answers, so commitments
+continue to share the actual resources. Admission requiring departure remains
+available when its joint witness can quote that owned departure. Payment to a
+former ally can be quoted after leaving. Actual whole-turn group changes,
+group funding with member commitments, wider
+profiles and lobby entry remain unfinished.
+
 ## Group admission with live commitments — 29 October 2026
 
 **Staged Basic prototype, not a selectable game mode.** A proposer or
@@ -14,12 +27,11 @@ decline when their own acceptance is blocked. The pending invitation can be
 declined, and alliance answers are not released merely because it temporarily
 prevents departure. Unanimous consent remains a provisional online procedure.
 
-Admission stays fenced for a participant with both an alliance answer and an
-unresolved payment or travel-family answer when the older whole-turn planner
-is present: that planner still assumes pairs. Group funding with a member's
-commitment, whole-turn Nexus changes, wider profiles and lobby entry remain
-unfinished. These focused staged cases do not certify complete group play or
-expansion combinations.
+Admission originally stayed fenced for a participant with both an alliance
+answer and an unresolved payment or travel-family answer when the older
+whole-turn planner was present; the later group-aware route above narrows
+that fence. These staged cases do not certify complete group play or expansion
+combinations.
 
 ## Group departures and unrelated commitments — 29 October 2026