diff --git a/README-CN.md b/README-CN.md
index f123974..821e9ee 100644
--- a/README-CN.md
+++ b/README-CN.md
@@ -33,6 +33,9 @@
 
 除此之外，仓库还包含一部分 **TeamOpenSirius 自有协议**。这些类型位于 `Sirius.Protocol.InternalApi`，用于 OpenSirius 内部服务之间通信，例如游戏服务端、账号平台和 Realtime 后端。它们属于 OpenSirius 私有基础设施协议，**不是客户端原始 API 的一部分**。
 
+`PlatformScoreRecordMutationContracts.cs` 定义 SiriusServer 补录正常结算成绩、
+清空指定谱面打歌记录的请求与响应类型。
+
 简单来说，SiriusData 是以下模块之间的公共数据边界：
 
 - 从 YMST 客户端恢复出的协议与数据结构；
diff --git a/README.md b/README.md
index 1f3f6cc..d7beee0 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,9 @@ Most game-facing models in `Sirius.Protocol` were reconstructed and adapted from
 
 The repository also contains a small set of **TeamOpenSirius-specific contracts** under `Sirius.Protocol.InternalApi`. These models are private infrastructure contracts used for communication between OpenSirius services such as the game server, account/platform services, and realtime backend. They are **not** intended to represent original client APIs.
 
+`PlatformScoreRecordMutationContracts.cs` defines the requests and replies for adding
+a normally settled play and clearing one chart's play records in SiriusServer.
+
 In short, SiriusData acts as the shared boundary between:
 
 - reconstructed YMST client protocol structures;
diff --git a/src/Sirius.Protocol/Models/InternalApi/PlatformScoreRecordMutationContracts.cs b/src/Sirius.Protocol/Models/InternalApi/PlatformScoreRecordMutationContracts.cs
new file mode 100644
index 0000000..82eeb65
--- /dev/null
+++ b/src/Sirius.Protocol/Models/InternalApi/PlatformScoreRecordMutationContracts.cs
@@ -0,0 +1,58 @@
+using System.Text.Json.Serialization;
+
+namespace Sirius.Protocol.InternalApi;
+
+[JsonUnmappedMemberHandling(JsonUnmappedMemberHandling.Disallow)]
+public sealed class PlatformClearScoresRequest
+{
+    public required string OperationId { get; set; }
+    public required string Reason { get; set; }
+}
+
+[JsonUnmappedMemberHandling(JsonUnmappedMemberHandling.Disallow)]
+public sealed class PlatformAddScoreRequest
+{
+    public required string OperationId { get; set; }
+    public required string Reason { get; set; }
+    public required long PartyId { get; set; }
+    public required long LiveSettingMasterId { get; set; }
+    public bool UseStamina { get; set; } = true;
+    public int StaminaConsumptionRatio { get; set; } = 1;
+    public bool IsStoryEventChallenge { get; set; }
+    public required long Score { get; set; }
+    public long SenseScore { get; set; }
+    public long StarActScore { get; set; }
+    public int StarActCount { get; set; }
+    public required int MaxCombo { get; set; }
+    public required int FinalLife { get; set; }
+    public required PlatformScoreJudgements Judgements { get; set; }
+}
+
+[JsonUnmappedMemberHandling(JsonUnmappedMemberHandling.Disallow)]
+public sealed class PlatformScoreJudgements
+{
+    public required int PerfectStar { get; set; }
+    public required int Perfect { get; set; }
+    public required int Great { get; set; }
+    public required int Good { get; set; }
+    public required int Bad { get; set; }
+    public required int Miss { get; set; }
+}
+
+public sealed record PlatformScoreReward(int ThingType, long ThingId, int Quantity);
+
+public sealed record PlatformScoreMutationReply
+{
+    public long AccountId { get; init; }
+    public long MusicId { get; init; }
+    public int Difficulty { get; init; }
+    public long? ResultId { get; init; }
+    public long ClearedRecords { get; init; }
+    public double PlayerRate { get; init; }
+    public double MaxPlayerRate { get; init; }
+    public int TotalSpCount { get; init; }
+    public int PlayerRank { get; init; }
+    public int CurrentStamina { get; init; }
+    public PlatformScoreReward[] Rewards { get; init; } = [];
+    public bool AlreadyProcessed { get; init; }
+}