Rules rev 3: Ward is a choice, Chaos honors the shield

WARD's text says "you may play at that time" — under rules revision 3
the choice is made by setting the trap: an armWard command toggles it
on your own turn (your secret; a private wardSet event and a rail
note), and the spring fires only while set, consuming the card and
the arming together. Async games keep their agency without an
interrupt window, exactly as the ambush system solved this before.

CHAOS gains its printed interactions: "FULL SHIELD removes a player
from participation" — a defender's shield sits them out instead of
stopping the spell, and after the counter chain every bystander gets
a shield window in seat order (chaosPending; queue head owes a
response in lobby summaries, the rail says whose hand hangs in the
balance) before the pile forms among the unshielded. "REFLECTIONS
have no effect" — both reflections are refused as counters. ABSORB
SPELL still eats the whole thing through the existing absorb path.

Both changes are frozen behind deckRev 3 so every stored game — and
the live one — replays byte-for-byte under its own rules. Five new
tests cover armed/unarmed wards, shielded defenders and bystanders,
the reflection refusal, and the legacy auto-ward.

Not deployed — a live game is in progress.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/web/src/App.svelte

@@ -87,6 +87,8 @@
       : null,
   );
   const youMustDiscard = $derived(view != null && view.pendingDiscard === view.you);
+  const youMustShield = $derived(view?.chaosPending?.queue[0] === view?.you && view != null);
+  const holdingWard = $derived(view?.yourHand.some((c) => c.cardId === "ward") ?? false);
 
   const selectedDef = $derived(selectedCard ? cardDef(selectedCard.cardId) : null);
   const EDGE_CARDS = new Set([
@@ -181,7 +183,7 @@
     if (!view) return;
     peekCard = null;
     peekCreatureId = null;
-    if (youMustRespond) {
+    if (youMustRespond || youMustShield) {
       dispatch({ type: "counteract", instanceId: card.instanceId });
       return;
     }
@@ -1003,6 +1005,17 @@
           <div class="slip">{view.activePlayerId} is taking their turn…</div>
         {/if}
 
+        {#if view.yourWardArmed}
+          <div class="slip ambush-note">🗡 Your ward is set — a thief who grabs your treasure bleeds for 3.</div>
+        {/if}
+        {#if youMustShield}
+          <div class="slip urgent">
+            Chaos comes for your hand — tap your Full Shield to sit out, or
+            <button class="stamp tiny" onclick={pass}>let it take you</button>
+          </div>
+        {:else if view.chaosPending}
+          <div class="slip">Chaos gathers — waiting on {view.chaosPending.queue[0]}…</div>
+        {/if}
         {#each idleCreatures as c (c.id)}
           {@const moves = c.movesPerTurn - c.movementUsed}
           <div class="slip creature-note">
@@ -1197,6 +1210,10 @@
               onclick={() => dispatch({ type: "pickUpObject", instanceId: obj.instanceId })}>
               Pick up {cardDef(obj.cardId).name}</button>
           {/each}
+          {#if holdingWard}
+            <button class="stamp" onclick={() => dispatch({ type: "armWard", armed: !view.yourWardArmed })}>
+              {view.yourWardArmed ? "Stand down the ward" : "Set the ward"}</button>
+          {/if}
           <button class="stamp" class:primary={punchWallMode} disabled={view.turn.attackUsed && !punchWallMode}
             onclick={() => (punchWallMode = !punchWallMode)}>
             {punchWallMode ? "Click the wall to punch — or cancel" : "Punch a wall…"}</button>