Offer first-death Kwisatz Haderach through the Tleilaxu Ambassador

game/tleilaxu-ambassador-leaders.ts

@@ -0,0 +1,36 @@
+import type { Game, Player } from './engine';
+import type { Leader } from './cards';
+
+type Context = Pick<Game, 'advanced'>;
+type Beneficiary = Pick<Player, 'faction' | 'leaders' | 'kwisatz' | 'battleLosses'>;
+export type TleilaxuAmbassadorLeaderChoice = { id: string; name: string; strength: number };
+
+const ownFirstDeath = (player: Beneficiary, leader: Leader) =>
+  leader.faction === player.faction && leader.dead && leader.deaths === 1 &&
+  !leader.capturedBy && !leader.gholaBy;
+
+/** Base p17 revives KH like a leader without adding it to the ordinary roster.
+ * Native KH death records start at cycle1; every existing return advances that
+ * marker. Repeat-return/ordinary-quota interpretation remains outside this grant. */
+function firstKwisatz(context: Context, player: Beneficiary): boolean {
+  return context.advanced && player.faction === 'atreides' && player.battleLosses >= 7 &&
+    player.kwisatz?.dead === true && (player.kwisatz.revivalCycle ?? 1) === 1;
+}
+
+/** Return the actual own identity, never a foreign disc or a cloned physical leader. */
+export function tleilaxuAmbassadorLeaderSelection(
+  context: Context, player: Beneficiary, id: unknown,
+): Leader | 'kwisatz' | null {
+  if (id === 'kwisatz') return firstKwisatz(context, player) ? 'kwisatz' : null;
+  return player.leaders.find(leader => leader.id === id && ownFirstDeath(player, leader)) ?? null;
+}
+
+export function tleilaxuAmbassadorLeaderChoices(
+  context: Context, player: Beneficiary,
+): TleilaxuAmbassadorLeaderChoice[] {
+  const choices: TleilaxuAmbassadorLeaderChoice[] = [];
+  for (const leader of player.leaders)
+    if (ownFirstDeath(player, leader)) choices.push({ id: leader.id, name: leader.name, strength: leader.strength });
+  if (firstKwisatz(context, player)) choices.push({ id: 'kwisatz', name: 'Kwisatz Haderach', strength: 2 });
+  return choices;
+}