Forgot unversioned xd

SVSim.EmulatedEntrypoint/Models/Dtos/Responses/Deck/DeckListResponse.cs

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+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Responses.Deck;
+
+/// <summary>
+/// Shape consumed by `DeckGroupListData(jsonData, format)` for a single-format call —
+/// the format-scoped decks land under `user_deck_list` (vs. the per-format keys used
+/// by /practice/deck_list with Format.All).
+/// </summary>
+[MessagePackObject]
+public class DeckListResponse
+{
+    [Key("maintenance_card_list")] public List<long> MaintenanceCardList { get; set; } = new();
+    [Key("user_deck_list")] public List<UserDeck>? UserDeckList { get; set; }
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Responses/Deck/DeckUpdateResponse.cs

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+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Common;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Responses.Deck;
+
+/// <summary>
+/// /deck/update response. Minimum-viable per spec is just {achieved_info, reward_list};
+/// the full shape also includes the refreshed deck list. We include user_deck_list to
+/// save the client a follow-up /deck/info round-trip.
+/// </summary>
+[MessagePackObject]
+public class DeckUpdateResponse
+{
+    [Key("user_deck_list")] public List<UserDeck>? UserDeckList { get; set; }
+    [Key("achieved_info")] public Dictionary<string, object> AchievedInfo { get; set; } = new();
+    [Key("reward_list")] public List<Reward> RewardList { get; set; } = new();
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Responses/Deck/EmptyDeckNumberResponse.cs

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+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Responses.Deck;
+
+[MessagePackObject]
+public class EmptyDeckNumberResponse
+{
+    /// <summary>The next free deck slot number. 0 indicates "no slots available".</summary>
+    [Key("empty_deck_num")] public int EmptyDeckNum { get; set; }
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Responses/Deck/SingleDeckResponse.cs

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+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Responses.Deck;
+
+/// <summary>
+/// Single-deck-update response. Consumed by DeckListUtility.DeckUpdate(user_deck,
+/// format, DeckAttributeType.CustomDeck). Shape is "one UserDeck wrapped under
+/// `user_deck` key" — same for update_name, update_sleeve, update_leader_skin,
+/// update_random_leader_skin.
+/// </summary>
+[MessagePackObject]
+public class SingleDeckResponse
+{
+    [Key("user_deck")] public UserDeck? UserDeck { get; set; }
+}