Resolve direct advanced Sneak arrivals

game/engine.ts

@@ -27887,6 +27887,9 @@ function sneakAttackOptions(
   let blocked: string | null = null;
   try {
     allowedEntry(g, owner, entry.territory, entry.sector);
+    if (g.advanced && (entry.resume === 'wormRide' || g.pendingArrivalOverlap?.resume === 'wormRide' ||
+      g.pendingAmbassador?.resume === 'wormRide'))
+      blocked = 'Sneak Attack during a worm ride needs its original ride continuation; send no forces or leave the token hidden.';
   } catch (error) {
     if (!(error instanceof RuleError)) throw error;
     blocked = error.message;
@@ -28168,7 +28171,10 @@ function decideTerror(g: Game, p: Player, action: Action) {
     const revivalArrival: RevivalEntryParent | undefined = amount > 0 && entry.revivalArrival
       ? {event:entry.revivalArrival.event,terror:{event:entry.entrySignature!,owner:p.id,
         territory:entry.territory,sector:entry.sector,amount,elite:0}} : undefined;
-    const advancedNativeOverlap = g.advanced && bareAdvancedNativeArrivalOverlap(g) && !!g.pendingArrivalOverlap;
+    // Worm continuations can advance the phase synchronously; their child
+    // arrival needs a separate retained worm cursor before it can be queued.
+    const advancedNativeArrival = g.advanced && entry.resume !== 'wormRide' &&
+      g.pendingArrivalOverlap?.resume !== 'wormRide' && g.pendingAmbassador?.resume !== 'wormRide';
     if (caladan) (g.homeworldVictoryReinforcement!.terrorArrivals ??= []).push(caladan.receipt);
     finishTerrorEntry(g);
     if (caladan) {
@@ -28185,7 +28191,7 @@ function decideTerror(g: Game, p: Player, action: Action) {
         phase:g.phase,revivalArrival,revivalSneakAdvisor:true});
       return;
     }
-    if (amount > 0 && (advancedNativeOverlap || !g.advanced &&
+    if (amount > 0 && (advancedNativeArrival || !g.advanced &&
       (g.pendingArrivalOverlap || g.pendingAmbassador || g.pendingTerrorEntry || g.response || g.decision))) {
       // The child may have opened the original Terror decision. Let it finish
       // before offering advisor reactions for this already-committed group.

game/reference.ts

@@ -4227,6 +4227,7 @@ export const RULE_TOPICS: RuleTopic[] = [
       'Sabotage: randomly draw and discard a Treachery Card from the entrant if possible. Then you may give that player a card of your choice from your own hand. Giving a card is optional. If the gift puts the recipient above their hand limit, the recipient provisionally chooses one held card to discard, including the gift; the original entry waits for that fresh discard and any supported Semuta reaction.',
       'Sneak Attack: send up to five of your reserve forces into the triggered territory at no cost, respecting storm and occupancy restrictions. This particular entry is allowed even when Atomics Aftermath is present.',
       'Before revealing Sneak Attack, inspect its private available maximum and any reason positive entry is blocked. You may keep it hidden. Revealing spends the token even if you then choose Send no forces. For a supported entry, select zero through the displayed maximum; forces enter the arrival’s territory and sector without consuming your ordinary shipment or movement turn. Zero remains available when positive entry is blocked. Aftermath’s printed exception allows this reserve entry even after Atomics resolves. A positive entry during Shipment and Movement is treated as an off-planet shipment for the Heighliners token, which accrues its once-per-turn income for its owner, and the committed entry finishes before Bene Gesserit may answer it with an Intrusion choice or a free spiritual-advisor shipment.',
+      'In Advanced play outside a worm continuation, the separate Sneak group can also trigger an eligible Ecaz Ambassador after its Bene Gesserit reactions. A positive Sneak group during a worm continuation is temporarily unavailable until the rider continuation can be preserved; leaving the token hidden or sending zero remains possible.',
       'The random Assassination token is separate from the advanced Assassinate Leaders advantage. Neither ability supplies the other’s selection or timing rules.',
     ],
     checklist: [
@@ -4234,7 +4235,7 @@ export const RULE_TOPICS: RuleTopic[] = [
       { area: 'Player controls', status: 'Partial', detail: 'Original actual390px Reveal Assassination resolves a captive Duke death6, displays Tanks inspection and resumes native Harkonnen movement. No selectable victim or projected pool; no overflow/browser errors.', evidence: ['components/game-table.tsx', 'components/duke-vidal.tsx'] },
       { area: 'AI', status: 'Partial', detail: 'All four policies make accepted original decisions: Easy reveals, Medium/Hard/Brutal form an accepted Enemy of My Enemy alliance in the actual native position. Legal participation only; no calibrated strategy claim.', evidence: ['game/bots.ts'] },
       { area: 'Documentation', status: 'Partial', detail: 'Effective-control exceptional pool, public victim and spent-empty behavior are labelled provisional and separate from Advanced battle-loss Assassinate Leaders. Native printed values and no foreign-Ghola Duke remain binding.', evidence: ['docs/MORITANI_ASSASSINATION_SNEAK.md', 'docs/MORITANI_TERROR_RULES.md', 'docs/RULE_DECISIONS.md'] },
-      { area: 'Verification', status: 'Partial', detail: 'Affected22-file195/195 and types/lint/build pass. Pure custody/identity/value boundaries plus original capture-to-Terror runtime and real table death6 pass. Empty boundary resumes genuine Guild entry but stages prior native deaths. Full combinations/deployed acceptance open.', evidence: ['tests/moritani-terror-assassination.test.ts', 'tests/moritani-terror-assassination-runtime.test.ts', 'tests/moritani-force-leader.test.ts'] },
+      { area: 'Verification', status: 'Partial', detail: 'Advanced direct Sneak and related arrivals pass ten files and 73 cases, with genuine setup and controlled physical token placements; a staged worm case exercises its temporary guard. Earlier affected22-file195/195 and types/lint/build pass for Assassination. Pure custody/identity/value boundaries plus original capture-to-Terror runtime and real table death6 pass. Empty boundary resumes genuine Guild entry but stages prior native deaths. Full combinations/deployed acceptance open.', evidence: ['tests/advanced-sneak-direct-runtime.test.ts', 'tests/ambassador-terror-overlap-worm.test.ts', 'tests/moritani-terror-assassination.test.ts', 'tests/moritani-terror-assassination-runtime.test.ts', 'tests/moritani-force-leader.test.ts'] },
     ],
     related: [
       'moritani-terror',