Preflight worm-ride arrivals for bot candidates

game/bot-arrival.ts

@@ -224,3 +224,37 @@ export function botArrivalBlock(g: GameView, action: Action): string | null {
     throw error;
   }
 }
+
+/** The worm decision itself is replaced before entry reactions; only a new
+ * intrusion or another pending control conflicts with the destination.
+ * Homeworld riders retain their separate unsupported-combination policy.
+ */
+export function botWormRideArrivalBlock(g: GameView, to: string, sector: number): string | null {
+  const ride = g.decision;
+  if (g.status !== 'playing' || g.phase !== 1 || ride?.kind !== 'wormRide' ||
+    ride.player !== g.me || g.homeworlds || !validLocation(to, sector))
+    return null;
+  try {
+    quoteCompletedMovementArrival({
+      advanced: g.advanced,
+      overlapSupported: g.arrivalOverlapMode === true,
+      players: g.players,
+      order: { player: g.me, origin: ride.territory, to,
+        advisors: false, wantsFighters: false },
+      ambassadors: (g.ambassadors?.tokens ?? []).map(
+        ({ zone, location, effect }) => ({ zone, location, effect })),
+      terror: (g.moritaniTerror?.tokens ?? []).map(
+        ({ status, location }) => ({ status, location })),
+      controls: {
+        response: !!g.response, decision: false,
+        pendingTerror: !!g.terrorEntry, pendingAmbassador: !!g.ambassadorEntry,
+        paidBox: false,
+      },
+      flight: null,
+    });
+    return null;
+  } catch (error) {
+    if (error instanceof MovementArrivalError) return error.message;
+    throw error;
+  }
+}

game/bots.ts

@@ -100,7 +100,7 @@ import { sandmasterDefaultChoice } from './sandmaster-movement';
 import { sandmasterWormCollection } from './sandmaster-worm';
 import { richeseCardDefinition } from './richese-cards';
 import { presenceAt } from './force-presence';
-import { botArrivalBlock } from './bot-arrival';
+import { botArrivalBlock, botWormRideArrivalBlock } from './bot-arrival';
 import { validateCohortSelection, type OrnithopterMode } from './ornithopter';
 import { fighterCount, isAdvisor } from './advisors';
 import { casualtyOptions, maxCombatDial, maxCombatSupport, type CombatForces } from './combat';
@@ -2667,7 +2667,8 @@ function policyActions(g: GameView): Action[] {
       ...destinations(g)
         .filter(
           (to) =>
-            to.t !== d.territory && botEntryAllowed(g, me, to.t, to.s, 'move'),
+            to.t !== d.territory && botEntryAllowed(g, me, to.t, to.s, 'move') &&
+            !botWormRideArrivalBlock(g, to.t, to.s),
         )
         .slice(0, 16)
         .map(