diff --git a/src/views/CardEntry.tsx b/src/views/CardEntry.tsx
index faa00e6..938f0d0 100644
--- a/src/views/CardEntry.tsx
+++ b/src/views/CardEntry.tsx
@@ -1,5 +1,5 @@
 import { useEffect, useRef, useState } from "react";
-import { api, CardRef, libraryKey } from "../api";
+import { api, CardRef, Deck, DeckEntry, DECK_STATUSES, isPhysical, libraryKey } from "../api";
 import { CardSearchBox, QtyStepper } from "../components";
 
 /** Rapid card entry: fuzzy search-as-you-type, ↑/↓ + Enter (or click) adds one copy. */
@@ -7,17 +7,42 @@ export function CardEntry() {
   const [query, setQuery] = useState("");
   const [results, setResults] = useState<CardRef[]>([]);
   const [recent, setRecent] = useState<
-    { oracleId: string; name: string; qty: number; location: string }[]
+    { oracleId: string; name: string; qty: number; location: string; deck: string }[]
   >([]);
   // Persisted so a "box" location sticks while entering a stack of cards.
   // Each library has its own boxes.
   const [location, setLocation] = useState(() => localStorage.getItem(libraryKey("add-location")) || "");
+  // Likewise a deck being filled from a pile of new cards. Retired decks
+  // aren't offered: they're kept for reference, not added to.
+  const [decks, setDecks] = useState<Deck[]>([]);
+  const [deckId, setDeckId] = useState<number | "">(() => {
+    const saved = Number(localStorage.getItem(libraryKey("add-deck")));
+    return saved > 0 ? saved : "";
+  });
   const searchInputRef = useRef<HTMLInputElement>(null);
 
   useEffect(() => {
     localStorage.setItem(libraryKey("add-location"), location);
   }, [location]);
 
+  useEffect(() => {
+    localStorage.setItem(libraryKey("add-deck"), String(deckId));
+  }, [deckId]);
+
+  useEffect(() => {
+    api.listDecks().then((all) => {
+      const open = all.filter((d) => d.status !== "retired");
+      setDecks(open);
+      // The remembered deck may since have been deleted or retired.
+      setDeckId((id) => (open.some((d) => d.id === id) ? id : ""));
+    });
+  }, []);
+
+  const deck = decks.find((d) => d.id === deckId) ?? null;
+  // A building/built deck holds its cards, so new copies go straight into it
+  // rather than into a box.
+  const intoDeck = deck !== null && isPhysical(deck.status);
+
   // Typing anywhere on this tab — without having clicked into another field
   // first — jumps focus to the search box and keeps the keystroke that
   // triggered it, instead of it going nowhere.
@@ -62,16 +87,40 @@ export function CardEntry() {
   }, [query]);
 
   async function add(card: CardRef) {
+    // Read the deck's slot before the new copy changes what it has spare.
+    const entry = deck ? (await api.deckContents(deck.id)).find((e) => e.oracle_id === card.oracle_id) : undefined;
     const qty = await api.addOwned(card.oracle_id, 1);
-    const loc = location.trim();
+    const loc = intoDeck ? "" : location.trim();
     if (loc) await api.setLocation(card.oracle_id, loc);
+    if (deck) await sendToDeck(deck, card.oracle_id, entry);
     setRecent((r) =>
-      [{ oracleId: card.oracle_id, name: card.name, qty, location: loc }, ...r].slice(0, 12),
+      [{ oracleId: card.oracle_id, name: card.name, qty, location: loc, deck: deck?.name ?? "" }, ...r].slice(0, 12),
     );
     setQuery("");
     setResults([]);
   }
 
+  /** Put a just-acquired copy in `deck`. It fills a slot the deck is short
+   * on when there is one, otherwise the deck gets one more copy. Short means
+   * not yet pulled for a building/built deck, which also counts the copy as
+   * pulled since it went straight in instead of into a box; for an idea deck
+   * it means not owned or claimed by other decks. A maybeboarded card moves
+   * to the main board. */
+  async function sendToDeck(deck: Deck, oracleId: string, entry: DeckEntry | undefined) {
+    const physical = isPhysical(deck.status);
+    let quantity = 1;
+    let pulled = 0;
+    if (entry && entry.is_maybeboard) {
+      quantity = entry.quantity;
+    } else if (entry) {
+      const short = physical ? entry.quantity_pulled < entry.quantity : entry.quantity_spare < entry.quantity;
+      quantity = short ? entry.quantity : entry.quantity + 1;
+      pulled = entry.quantity_pulled;
+    }
+    await api.setDeckCard(deck.id, oracleId, quantity, entry?.is_commander ?? false, false);
+    if (physical) await api.setDeckCardPulled(deck.id, oracleId, pulled + 1);
+  }
+
   async function adjust(oracleId: string, delta: number) {
     const qty = await api.addOwned(oracleId, delta);
     setRecent((r) => r.map((e) => (e.oracleId === oracleId ? { ...e, qty } : e)));
@@ -83,13 +132,27 @@ export function CardEntry() {
         <h2 className="page-header-title">Add Cards</h2>
       </div>
 
-      <div className="field" style={{ maxWidth: 260, marginBottom: "var(--space-3)" }}>
-        <label>Location for added cards (optional)</label>
-        <input
-          placeholder="e.g. Box 1 — prefilled onto each card"
-          value={location}
-          onChange={(e) => setLocation(e.target.value)}
-        />
+      <div className="row" style={{ gap: "var(--space-4)", flexWrap: "wrap", alignItems: "flex-start", marginBottom: "var(--space-3)" }}>
+        <div className="field" style={{ width: 260 }}>
+          <label>Location for added cards (optional)</label>
+          <input
+            placeholder={intoDeck ? "Not needed — goes into the deck" : "e.g. Box 1 — prefilled onto each card"}
+            value={intoDeck ? "" : location}
+            disabled={intoDeck}
+            onChange={(e) => setLocation(e.target.value)}
+          />
+        </div>
+        <div className="field" style={{ width: 260 }}>
+          <label>Send to deck (optional)</label>
+          <select value={deckId} onChange={(e) => setDeckId(e.target.value === "" ? "" : Number(e.target.value))}>
+            <option value="">Library only</option>
+            {decks.map((d) => (
+              <option key={d.id} value={d.id}>
+                {d.name} ({DECK_STATUSES.find((s) => s.value === d.status)?.label ?? d.status})
+              </option>
+            ))}
+          </select>
+        </div>
       </div>
 
       <CardSearchBox
@@ -110,6 +173,7 @@ export function CardEntry() {
             {recent.map((r, i) => (
               <li key={i} style={{ cursor: "default" }}>
                 <span className="card-name">{r.name}</span>
+                {r.deck && <span className="deck-chip">→ {r.deck}</span>}
                 {r.location && <span className="deck-chip">{r.location}</span>}
                 <span className="spacer" />
                 <QtyStepper