diff --git a/AIChatPanel.xaml.cs b/AIChatPanel.xaml.cs
index 60ffe51..100f245 100644
--- a/AIChatPanel.xaml.cs
+++ b/AIChatPanel.xaml.cs
@@ -97,6 +97,7 @@ namespace AnotherReplayReader
         // 外部注入：每次请求前调用获取最新配置
         // 委托类型变更
         public Func<AiRequestContext>? GetRequestContext { get; set; }
+        public Func<AiPromptSettings>? GetPromptSettings { get; set; }
 
         // ---------- methods ----------
 
@@ -248,7 +249,7 @@ namespace AnotherReplayReader
                 FinishCurrentContent();
                 var requestContext = GetRequestContext();
 
-                var systemPrompt = AIAnalyze.GetSystemPrompt(replay, players);
+                var systemPrompt = AIAnalyze.GetSystemPrompt(replay, players, GetPromptSettings?.Invoke());
                 var userPrompt = AIAnalyze.BuildUserPrompt(replay.Mod, players, replayData, out var userPromptPrefix);
                 AppendLog($"让 AI 了解录像...", 
                     userPromptPrefix
@@ -358,6 +359,14 @@ namespace AnotherReplayReader
                     requestContext,
                     OnChunk,
                     _linkedCts.Token);
+                var validationResult = AIAnalysisValidation.ValidateMachineReadableClaims(segmentResult.Response);
+                if (validationResult.HasIssues)
+                {
+                    AppendLog(
+                        $"第{segmentIndex}段机器可读声明检查",
+                        AIAnalysisValidation.FormatIssues(validationResult.Issues),
+                        false);
+                }
                 _lastSuccessfulSegment = lastState.CurrentSegment;
                 lastState = segmentResult.State;
                 UpdateTokenDisplay(segmentResult);
@@ -831,4 +840,4 @@ namespace AnotherReplayReader
             return $"{n / m:0.#}{(binary ? "Mi" : "M")}{unit}";
         }
     }
-}
\ No newline at end of file
+}
diff --git a/AIProviderSettingsControl.xaml b/AIProviderSettingsControl.xaml
index 765814f..9b90ed5 100644
--- a/AIProviderSettingsControl.xaml
+++ b/AIProviderSettingsControl.xaml
@@ -32,6 +32,7 @@
         <!-- 右侧：Provider 编辑 + 模型管理 -->
         <Grid Grid.Column="1" Margin="10,0,0,0">
             <Grid.RowDefinitions>
+                <RowDefinition Height="Auto"/>
                 <RowDefinition Height="Auto"/>
                 <RowDefinition Height="*"/>
             </Grid.RowDefinitions>
@@ -69,8 +70,58 @@
                 </StackPanel>
             </Grid>
 
+            <!-- Prompt 管理区域 -->
+            <GroupBox Header="提示词" Grid.Row="1" Margin="0,5,0,0">
+                <Grid Margin="5">
+                    <Grid.RowDefinitions>
+                        <RowDefinition Height="Auto"/>
+                        <RowDefinition Height="Auto"/>
+                        <RowDefinition Height="Auto"/>
+                    </Grid.RowDefinitions>
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="100"/>
+                        <ColumnDefinition Width="*"/>
+                    </Grid.ColumnDefinitions>
+
+                    <CheckBox x:Name="_useCustomPromptCheck"
+                              Grid.Row="0" Grid.Column="1"
+                              Content="完全使用自定义 System Prompt"
+                              Margin="0,0,0,5"/>
+
+                    <Label Grid.Row="1" Grid.Column="0" Content="System Prompt"/>
+                    <TextBox x:Name="_customPromptBox"
+                             Grid.Row="1" Grid.Column="1"
+                             MinHeight="80"
+                             MaxHeight="160"
+                             AcceptsReturn="True"
+                             TextWrapping="Wrap"
+                             ScrollViewer.VerticalScrollBarVisibility="Auto"/>
+
+                    <Grid Grid.Row="2" Grid.ColumnSpan="2" Margin="0,5,0,0">
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="100"/>
+                            <ColumnDefinition Width="*"/>
+                            <ColumnDefinition Width="Auto"/>
+                        </Grid.ColumnDefinitions>
+                        <Label Grid.Column="0" Content="补充规则"/>
+                        <TextBox x:Name="_additionalRulesBox"
+                                 Grid.Column="1"
+                                 MinHeight="50"
+                                 MaxHeight="100"
+                                 AcceptsReturn="True"
+                                 TextWrapping="Wrap"
+                                 ScrollViewer.VerticalScrollBarVisibility="Auto"/>
+                        <StackPanel Grid.Column="2" Margin="5,0,0,0">
+                            <Button Content="应用提示词" Click="OnApplyPromptClick" Margin="2"/>
+                            <Button Content="恢复默认" Click="OnResetPromptClick" Margin="2"/>
+                            <Button Content="清空补充" Click="OnClearAdditionalRulesClick" Margin="2"/>
+                        </StackPanel>
+                    </Grid>
+                </Grid>
+            </GroupBox>
+
             <!-- 模型管理区域 -->
-            <GroupBox Header="模型" Grid.Row="1" Margin="0,5,0,0">
+            <GroupBox Header="模型" Grid.Row="2" Margin="0,5,0,0">
                 <DockPanel>
                     <StackPanel DockPanel.Dock="Top" Orientation="Horizontal" Margin="0,0,0,5">
                         <ComboBox x:Name="_modelComboBox"
@@ -128,4 +179,4 @@
             </GroupBox>
         </Grid>
     </Grid>
-</UserControl>
\ No newline at end of file
+</UserControl>
diff --git a/AIProviderSettingsControl.xaml.cs b/AIProviderSettingsControl.xaml.cs
index 6545844..69a1606 100644
--- a/AIProviderSettingsControl.xaml.cs
+++ b/AIProviderSettingsControl.xaml.cs
@@ -29,6 +29,7 @@ namespace AnotherReplayReader
         {
             InitializeComponent();
             _settings = AiSettings.Load();
+            RefreshPromptFields();
             RefreshProviderList();
             if (_settings.Providers.Count > 0)
             {
@@ -46,6 +47,52 @@ namespace AnotherReplayReader
             return new AiRequestContext(_currentProvider, _currentModel);
         }
 
+        public AiPromptSettings GetPromptSettings()
+        {
+            return _settings.Prompt;
+        }
+
+        private void RefreshPromptFields()
+        {
+            _useCustomPromptCheck.IsChecked = _settings.Prompt.UseCustomSystemPrompt;
+            _customPromptBox.Text = _settings.Prompt.CustomSystemPrompt;
+            _additionalRulesBox.Text = _settings.Prompt.AdditionalRules;
+        }
+
+        private void OnApplyPromptClick(object sender, RoutedEventArgs e)
+        {
+            _settings.Prompt.UseCustomSystemPrompt = _useCustomPromptCheck.IsChecked == true;
+            _settings.Prompt.CustomSystemPrompt = _customPromptBox.Text;
+            _settings.Prompt.AdditionalRules = _additionalRulesBox.Text;
+            _settings.Save();
+            MessageBox.Show("提示词配置已保存", "信息", MessageBoxButton.OK, MessageBoxImage.Information);
+        }
+
+        private void OnResetPromptClick(object sender, RoutedEventArgs e)
+        {
+            var result = MessageBox.Show(
+                "确定要恢复内置 System Prompt 吗？自定义 System Prompt 会被清空，补充规则会保留。",
+                "恢复默认提示词",
+                MessageBoxButton.YesNo,
+                MessageBoxImage.Question);
+            if (result != MessageBoxResult.Yes)
+            {
+                return;
+            }
+
+            _settings.Prompt.UseCustomSystemPrompt = false;
+            _settings.Prompt.CustomSystemPrompt = string.Empty;
+            _settings.Save();
+            RefreshPromptFields();
+        }
+
+        private void OnClearAdditionalRulesClick(object sender, RoutedEventArgs e)
+        {
+            _settings.Prompt.AdditionalRules = string.Empty;
+            _settings.Save();
+            RefreshPromptFields();
+        }
+
         // ---------- Provider 列表管理 ----------
         private void RefreshProviderList()
         {
@@ -377,4 +424,4 @@ namespace AnotherReplayReader
             _extraParamsBox.Text = "";
         }
     }
-}
\ No newline at end of file
+}
diff --git a/CONTEXT.md b/CONTEXT.md
new file mode 100644
index 0000000..d9a0073
--- /dev/null
+++ b/CONTEXT.md
@@ -0,0 +1,21 @@
+# Context
+
+## Glossary
+
+### Operation Fact
+A fact directly extracted from replay command data, such as command time, player, command name, UnitId, asset id, special power id, production queue, or target position.
+
+### UnitId Guess
+A hypothesis about what game object a UnitId represents. A UnitId Guess is not a fact unless it is directly supported by replay data or game rules.
+
+### Evidence Level
+The confidence assigned to a UnitId Guess or tactical conclusion. Valid levels are: confirmed, highly likely, possible, uncertain, and ruled out.
+
+### Validation Rule
+A deterministic rule that checks LLM claims against Operation Facts and known game rules.
+
+### Validation Issue
+A machine-detected problem in an LLM claim, such as a direct contradiction, weak evidence, missing alternative, or impossible timeline.
+
+### Revision Pass
+A hidden LLM request that receives the prior draft, validation issues, and relevant Operation Facts, then produces a corrected analysis without exposing apology or correction chatter to the user.
diff --git a/EventDump.xaml.cs b/EventDump.xaml.cs
index a056f75..ec189f7 100644
--- a/EventDump.xaml.cs
+++ b/EventDump.xaml.cs
@@ -449,6 +449,7 @@ namespace AnotherReplayReader
                 return;
             }
             _aiPanel.GetRequestContext = _aiSettings.GetCurrentContext!;
+            _aiPanel.GetPromptSettings = _aiSettings.GetPromptSettings;
 
             await _aiPanel.StartAnalysisAsync(replay, _model.Players, cached, cachedPrefixSums, _cancellation.Token);
         }
diff --git a/Utils/AIAnalysisValidation.cs b/Utils/AIAnalysisValidation.cs
new file mode 100644
index 0000000..7e886d0
--- /dev/null
+++ b/Utils/AIAnalysisValidation.cs
@@ -0,0 +1,381 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+using System.Text.RegularExpressions;
+
+namespace AnotherReplayReader.Utils
+{
+    internal enum AIValidationSeverity
+    {
+        Info,
+        WeakEvidence,
+        Warning,
+        Contradiction,
+        Fatal
+    }
+
+    internal enum AIValidationIssueKind
+    {
+        InvalidMachineReadableClaims,
+        MissingMachineReadableClaims,
+        MissingAlternative,
+        WeakEvidence,
+        MissingEvidence,
+        InvalidEvidenceLevel,
+        UnitCapabilityContradiction,
+        UnitTimelineContradiction,
+        UnsupportedGameKnowledge
+    }
+
+    internal enum AIEvidenceLevel
+    {
+        Confirmed,
+        HighlyLikely,
+        Possible,
+        Uncertain,
+        RuledOut
+    }
+
+    internal sealed record AIUnitClaim(
+        string UnitId,
+        string Player,
+        string Claim,
+        AIEvidenceLevel EvidenceLevel,
+        ImmutableArray<string> Evidence,
+        ImmutableArray<string> Alternatives,
+        ImmutableArray<string> NeedsConfirmation);
+
+    internal sealed record AIEventClaim(
+        string Claim,
+        AIEvidenceLevel EvidenceLevel,
+        ImmutableArray<string> Evidence);
+
+    internal sealed record AITimelineClaim(
+        string Claim,
+        AIEvidenceLevel EvidenceLevel,
+        ImmutableArray<string> Evidence);
+
+    internal sealed record AIMachineReadableClaims(
+        ImmutableArray<AIUnitClaim> UnitClaims,
+        ImmutableArray<AIEventClaim> EventClaims,
+        ImmutableArray<AITimelineClaim> TimelineClaims)
+    {
+        public static AIMachineReadableClaims Empty { get; } = new(
+            ImmutableArray<AIUnitClaim>.Empty,
+            ImmutableArray<AIEventClaim>.Empty,
+            ImmutableArray<AITimelineClaim>.Empty);
+    }
+
+    internal sealed record AIValidationIssue(
+        AIValidationSeverity Severity,
+        AIValidationIssueKind Kind,
+        string Message,
+        string? UnitId = null,
+        TimeSpan? Time = null);
+
+    internal sealed record AIValidationResult(
+        AIMachineReadableClaims Claims,
+        ImmutableArray<AIValidationIssue> Issues)
+    {
+        public static AIValidationResult Empty { get; } =
+            new(AIMachineReadableClaims.Empty, ImmutableArray<AIValidationIssue>.Empty);
+
+        public bool RequiresRevision =>
+            Issues.Any(i => i.Severity is AIValidationSeverity.Contradiction or AIValidationSeverity.Fatal);
+
+        public bool HasIssues => !Issues.IsEmpty;
+    }
+
+    internal static class AIAnalysisValidation
+    {
+        private static readonly Regex _jsonFenceRegex = new(
+            @"```(?:json)?\s*(\{[\s\S]*?\})\s*```",
+            RegexOptions.IgnoreCase | RegexOptions.Compiled);
+
+        public static AIValidationResult ValidateMachineReadableClaims(string response)
+        {
+            var issues = ImmutableArray.CreateBuilder<AIValidationIssue>();
+            var json = ExtractJsonObject(response);
+            if (json is null || string.IsNullOrWhiteSpace(json))
+            {
+                issues.Add(new AIValidationIssue(
+                    AIValidationSeverity.Warning,
+                    AIValidationIssueKind.MissingMachineReadableClaims,
+                    "AI 未输出机器可读声明，无法进行自动验证。"));
+                return new AIValidationResult(AIMachineReadableClaims.Empty, issues.ToImmutable());
+            }
+
+            var claims = ParseClaims(json, issues);
+            if (claims is null)
+            {
+                return new AIValidationResult(AIMachineReadableClaims.Empty, issues.ToImmutable());
+            }
+
+            ValidateClaimSelfConsistency(claims, issues);
+            return new AIValidationResult(claims, issues.ToImmutable());
+        }
+
+        public static string FormatIssues(ImmutableArray<AIValidationIssue> issues)
+        {
+            if (issues.IsEmpty)
+            {
+                return "未发现机器可读声明问题。";
+            }
+
+            var sb = new StringBuilder();
+            foreach (var issue in issues)
+            {
+                var unitText = string.IsNullOrWhiteSpace(issue.UnitId)
+                    ? string.Empty
+                    : $" UnitId={issue.UnitId}";
+                sb.AppendLine($"[{issue.Severity}/{issue.Kind}]{unitText} {issue.Message}");
+            }
+            return sb.ToString().TrimEnd();
+        }
+
+        private static string? ExtractJsonObject(string response)
+        {
+            var markerIndex = response.LastIndexOf("[机器可读声明]", StringComparison.OrdinalIgnoreCase);
+            var searchText = markerIndex >= 0 ? response.Substring(markerIndex) : response;
+
+            var matches = _jsonFenceRegex.Matches(searchText);
+            if (matches.Count > 0)
+            {
+                return matches[matches.Count - 1].Groups[1].Value;
+            }
+
+            var start = searchText.LastIndexOf('{');
+            var end = searchText.LastIndexOf('}');
+            if (start >= 0 && end > start)
+            {
+                return searchText.Substring(start, end - start + 1);
+            }
+
+            return null;
+        }
+
+        private static AIMachineReadableClaims? ParseClaims(
+            string json,
+            ImmutableArray<AIValidationIssue>.Builder issues)
+        {
+            try
+            {
+                using var doc = JsonDocument.Parse(json, new JsonDocumentOptions
+                {
+                    AllowTrailingCommas = true,
+                    CommentHandling = JsonCommentHandling.Skip
+                });
+
+                var root = doc.RootElement;
+                if (root.ValueKind != JsonValueKind.Object)
+                {
+                    issues.Add(new AIValidationIssue(
+                        AIValidationSeverity.Warning,
+                        AIValidationIssueKind.InvalidMachineReadableClaims,
+                        "机器可读声明不是 JSON object。"));
+                    return null;
+                }
+
+                return new AIMachineReadableClaims(
+                    ReadUnitClaims(root),
+                    ReadSimpleClaims(root, "eventClaims")
+                        .Select(c => new AIEventClaim(c.Claim, c.EvidenceLevel, c.Evidence))
+                        .ToImmutableArray(),
+                    ReadSimpleClaims(root, "timelineClaims")
+                        .Select(c => new AITimelineClaim(c.Claim, c.EvidenceLevel, c.Evidence))
+                        .ToImmutableArray());
+            }
+            catch (JsonException ex)
+            {
+                issues.Add(new AIValidationIssue(
+                    AIValidationSeverity.Warning,
+                    AIValidationIssueKind.InvalidMachineReadableClaims,
+                    $"机器可读声明 JSON 解析失败：{ex.Message}"));
+                return null;
+            }
+        }
+
+        private static ImmutableArray<AIUnitClaim> ReadUnitClaims(JsonElement root)
+        {
+            if (!TryGetArray(root, "unitClaims", out var unitClaims))
+            {
+                return ImmutableArray<AIUnitClaim>.Empty;
+            }
+
+            var result = ImmutableArray.CreateBuilder<AIUnitClaim>();
+            foreach (var item in unitClaims.EnumerateArray())
+            {
+                if (item.ValueKind != JsonValueKind.Object)
+                {
+                    continue;
+                }
+
+                result.Add(new AIUnitClaim(
+                    ReadFlexibleString(item, "unitId"),
+                    ReadFlexibleString(item, "player"),
+                    ReadFlexibleString(item, "claim"),
+                    ReadEvidenceLevel(item),
+                    ReadStringArray(item, "evidence"),
+                    ReadStringArray(item, "alternatives"),
+                    ReadStringArray(item, "needsConfirmation")));
+            }
+            return result.ToImmutable();
+        }
+
+        private sealed record SimpleClaim(
+            string Claim,
+            AIEvidenceLevel EvidenceLevel,
+            ImmutableArray<string> Evidence);
+
+        private static ImmutableArray<SimpleClaim> ReadSimpleClaims(JsonElement root, string propertyName)
+        {
+            if (!TryGetArray(root, propertyName, out var claims))
+            {
+                return ImmutableArray<SimpleClaim>.Empty;
+            }
+
+            var result = ImmutableArray.CreateBuilder<SimpleClaim>();
+            foreach (var item in claims.EnumerateArray())
+            {
+                if (item.ValueKind != JsonValueKind.Object)
+                {
+                    continue;
+                }
+
+                result.Add(new SimpleClaim(
+                    ReadFlexibleString(item, "claim"),
+                    ReadEvidenceLevel(item),
+                    ReadStringArray(item, "evidence")));
+            }
+            return result.ToImmutable();
+        }
+
+        private static void ValidateClaimSelfConsistency(
+            AIMachineReadableClaims claims,
+            ImmutableArray<AIValidationIssue>.Builder issues)
+        {
+            foreach (var claim in claims.UnitClaims)
+            {
+                if (string.IsNullOrWhiteSpace(claim.UnitId))
+                {
+                    issues.Add(new AIValidationIssue(
+                        AIValidationSeverity.Warning,
+                        AIValidationIssueKind.InvalidMachineReadableClaims,
+                        "Unit claim 缺少 unitId。"));
+                }
+                if (string.IsNullOrWhiteSpace(claim.Claim))
+                {
+                    issues.Add(new AIValidationIssue(
+                        AIValidationSeverity.Warning,
+                        AIValidationIssueKind.InvalidMachineReadableClaims,
+                        "Unit claim 缺少 claim。",
+                        claim.UnitId));
+                }
+                if (claim.EvidenceLevel is AIEvidenceLevel.Confirmed or AIEvidenceLevel.HighlyLikely
+                    && claim.Evidence.IsEmpty)
+                {
+                    issues.Add(new AIValidationIssue(
+                        AIValidationSeverity.Warning,
+                        AIValidationIssueKind.MissingEvidence,
+                        "高置信 UnitId 推测缺少 evidence。",
+                        claim.UnitId));
+                }
+                if (claim.EvidenceLevel is AIEvidenceLevel.Possible or AIEvidenceLevel.Uncertain
+                    && claim.Alternatives.IsEmpty
+                    && claim.NeedsConfirmation.IsEmpty)
+                {
+                    issues.Add(new AIValidationIssue(
+                        AIValidationSeverity.WeakEvidence,
+                        AIValidationIssueKind.MissingAlternative,
+                        "低置信 UnitId 推测应提供 alternatives 或 needsConfirmation。",
+                        claim.UnitId));
+                }
+            }
+        }
+
+        private static bool TryGetArray(JsonElement root, string propertyName, out JsonElement array)
+        {
+            if (root.TryGetProperty(propertyName, out array)
+                && array.ValueKind == JsonValueKind.Array)
+            {
+                return true;
+            }
+
+            array = default;
+            return false;
+        }
+
+        private static AIEvidenceLevel ReadEvidenceLevel(JsonElement item)
+        {
+            var value = ReadFlexibleString(item, "evidenceLevel");
+            return NormalizeEvidenceLevel(value);
+        }
+
+        private static AIEvidenceLevel NormalizeEvidenceLevel(string value)
+        {
+            value = value.Trim().Replace("_", "").Replace("-", "").Replace(" ", "");
+            return value.ToLowerInvariant() switch
+            {
+                "confirmed" or "确定" => AIEvidenceLevel.Confirmed,
+                "highlylikely" or "high" or "高度可能" => AIEvidenceLevel.HighlyLikely,
+                "possible" or "可能" => AIEvidenceLevel.Possible,
+                "ruledout" or "excluded" or "已排除" => AIEvidenceLevel.RuledOut,
+                _ => AIEvidenceLevel.Uncertain,
+            };
+        }
+
+        private static string ReadFlexibleString(JsonElement item, string propertyName)
+        {
+            if (!item.TryGetProperty(propertyName, out var value))
+            {
+                return string.Empty;
+            }
+
+            return value.ValueKind switch
+            {
+                JsonValueKind.String => value.GetString() ?? string.Empty,
+                JsonValueKind.Number => value.GetRawText(),
+                JsonValueKind.True => "true",
+                JsonValueKind.False => "false",
+                _ => string.Empty,
+            };
+        }
+
+        private static ImmutableArray<string> ReadStringArray(JsonElement item, string propertyName)
+        {
+            if (!item.TryGetProperty(propertyName, out var value))
+            {
+                return ImmutableArray<string>.Empty;
+            }
+
+            if (value.ValueKind == JsonValueKind.String)
+            {
+                var text = value.GetString();
+                return string.IsNullOrWhiteSpace(text)
+                    ? ImmutableArray<string>.Empty
+                    : ImmutableArray.Create(text!);
+            }
+
+            if (value.ValueKind != JsonValueKind.Array)
+            {
+                return ImmutableArray<string>.Empty;
+            }
+
+            var result = new List<string>();
+            foreach (var element in value.EnumerateArray())
+            {
+                var text = element.ValueKind == JsonValueKind.String
+                    ? element.GetString()
+                    : element.GetRawText();
+                if (!string.IsNullOrWhiteSpace(text))
+                {
+                    result.Add(text!);
+                }
+            }
+            return result.ToImmutableArray();
+        }
+    }
+}
diff --git a/Utils/AIAnalyze.cs b/Utils/AIAnalyze.cs
index a529744..60748b3 100644
--- a/Utils/AIAnalyze.cs
+++ b/Utils/AIAnalyze.cs
@@ -17,13 +17,51 @@ namespace AnotherReplayReader.Utils
 {
     internal sealed class AIAnalyze
     {
-        public static string GetSystemPrompt(Replay replay, ImmutableSortedDictionary<int, Player> players)
+        public static string GetSystemPrompt(
+            Replay replay,
+            ImmutableSortedDictionary<int, Player> players,
+            AiPromptSettings? promptSettings = null)
+        {
+            var defaultPrompt = BuildDefaultSystemPrompt(replay, players);
+            return ComposeSystemPrompt(defaultPrompt, promptSettings);
+        }
+
+        public static string ComposeSystemPrompt(string defaultPrompt, AiPromptSettings? promptSettings)
+        {
+            var customSystemPrompt = promptSettings?.CustomSystemPrompt ?? string.Empty;
+            if (promptSettings?.UseCustomSystemPrompt == true
+                && !string.IsNullOrWhiteSpace(customSystemPrompt))
+            {
+                defaultPrompt = customSystemPrompt;
+            }
+
+            var additionalRules = promptSettings?.AdditionalRules ?? string.Empty;
+            if (!string.IsNullOrWhiteSpace(additionalRules))
+            {
+                defaultPrompt = defaultPrompt.TrimEnd()
+                    + "\n\n# 用户自定义补充规则\n"
+                    + additionalRules.Trim();
+            }
+
+            return defaultPrompt.Replace("\r", "");
+        }
+
+        public static string BuildDefaultSystemPrompt(Replay replay, ImmutableSortedDictionary<int, Player> players)
         {
 
             var generalDescriptions = @"
 你是一位 RTS 游戏数据分析师，你擅长从大量数据中发现有趣的规律和细节。
 用户则是一位玩家，用户会向你提供玩家操作记录，你要对其进行分析。
 
+# 核心原则
+- 你只能根据用户提供的操作记录、玩家信息、下方游戏规则和明确给出的背景知识进行分析。
+- 不要使用现实世界常识或其他 RTS 游戏常识覆盖这里的游戏设定。例如：步兵、直升机、建筑水陆摆放、运输能力、两栖能力都必须以这里的规则和单位描述为准。
+- 不确定时必须保留多个候选，不要为了让解说流畅而过早下定论。
+- 对 UnitId、单位类型、战术意图的判断必须区分证据等级：确定、高度可能、可能、待确认、已排除。
+- 每个关键推理都应当包含支持证据；如果存在会推翻该推理的反证，也要主动指出。
+- 如果某个技能或行为可以对应多个单位，先列出候选，并说明还需要哪些后续迹象才能确认。
+- 对已经被操作记录直接否定的判断必须修正或放弃，不要坚持原结论。
+
 # 输入格式
 ## 用户初始输入
 - 玩家信息
@@ -83,11 +121,36 @@ namespace AnotherReplayReader.Utils
 - 也可以重点关注PlayerTech、英雄、工程师
 - 按照**推理指南**进行详细的思考与推理，列举你的推理与发现
 - 输出：该阶段的各个主要事件，以及你的推理和发现
+- 假如推测 UnitId 对应的单位，请在正文中自然描述，并在末尾输出机器可读声明，方便程序验证
 
 ## 3. 最终总结阶段
 触发条件：用户输入包含：""请对以上内容进行总结""
 - 输出：所有分析的总结，以及这次对局的完整介绍
 
+# 机器可读声明
+仅限于：分段分析阶段（第2阶段）
+如果你对 UnitId、关键事件或时间线做出了可验证推测，请在回答末尾附加下面格式。
+必须先输出一行`[机器可读声明]`，然后输出一个 JSON 代码块：
+[机器可读声明]
+```json
+{
+  ""unitClaims"": [
+    {
+      ""unitId"": 123,
+      ""player"": ""PlayerA"",
+      ""claim"": ""AlliedMCV"",
+      ""evidenceLevel"": ""possible"",
+      ""evidence"": [""8:30 使用 SpecialPower_UnpackReplaceSelf""],
+      ""alternatives"": [""AlliedMiner 展开后的指挥中心""],
+      ""needsConfirmation"": [""是否曾使用 SpecialPower_PackReplaceSelf"", ""后续是否作为建造者出现""]
+    }
+  ],
+  ""eventClaims"": [],
+  ""timelineClaims"": []
+}
+```
+如果没有可验证推测，可以输出空数组。不要在 JSON 里写注释。
+
 # 推理指南
 推理需要分成多个阶段
 1. 观察
@@ -953,6 +1016,7 @@ PlayerA: 开始出兵
 请按照按照[观察]、[分析]、[推理]、[进一步思考（可选）]的步骤，对各个事件进行分析和推理。
 
 假如当前阶段存在一些较为重要的单位、而且能够推测出它们可能是什么单位，则可以列出单位的UnitId以及你对单位的推测
+如果你列出了 UnitId 推测、关键事件推测或时间线推测，请在回答末尾附加`[机器可读声明]` JSON 代码块；如果没有相关推测，则输出空数组。
 ";
             return instruction.Trim().Replace("\r", "");
         }
@@ -1273,8 +1337,8 @@ PlayerA: 开始出兵
                 result.ReasoningTokens = GetIntegerProperty(usage, "reasoning_tokens") ?? result.ReasoningTokens;
             }
 
-            // 提取 usage（如果存在）
-            if (doc.RootElement.TryGetProperty("error", out var error) && usage.ValueKind == JsonValueKind.Object)
+            // 提取 error（如果存在）
+            if (doc.RootElement.TryGetProperty("error", out var error) && error.ValueKind == JsonValueKind.Object)
             {
                 if (error.TryGetProperty("message", out var message))
                 {
diff --git a/Utils/AiSettings.cs b/Utils/AiSettings.cs
index e043249..fe7306f 100644
--- a/Utils/AiSettings.cs
+++ b/Utils/AiSettings.cs
@@ -18,11 +18,21 @@ namespace AnotherReplayReader
         public string ApiKey { get; set; } = string.Empty;
         public List<AiModel> Models { get; set; } = [];
 
-        public double DefaultTemperature { get; set; } = 0.75;
+        public double DefaultTemperature { get; set; } = 0.35;
         public double DefaultTopP { get; set; } = 0.95;
         public int DefaultMaxTokens { get; set; } = 16384;
     }
 
+    /// <summary>
+    /// AI 分析提示词配置。
+    /// </summary>
+    public class AiPromptSettings
+    {
+        public bool UseCustomSystemPrompt { get; set; }
+        public string CustomSystemPrompt { get; set; } = string.Empty;
+        public string AdditionalRules { get; set; } = string.Empty;
+    }
+
     /// <summary>
     /// 模型条目
     /// </summary>
@@ -270,6 +280,7 @@ namespace AnotherReplayReader
     public class AiSettings
     {
         public List<AiProvider> Providers { get; set; } = [];
+        public AiPromptSettings Prompt { get; set; } = new();
 
         // 以下两个不持久化，由 UI 层维护当前选中项
         [System.Text.Json.Serialization.JsonIgnore]
@@ -289,6 +300,7 @@ namespace AnotherReplayReader
                     var settings = JsonSerializer.Deserialize<AiSettings>(json);
                     if (settings is { } value && value.Providers.Count > 0)
                     {
+                        value.Prompt ??= new AiPromptSettings();
                         return settings;
                     }
                 }
@@ -342,4 +354,4 @@ namespace AnotherReplayReader
             File.WriteAllText(ConfigPath, json);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/WIP.md b/WIP.md
new file mode 100644
index 0000000..1b263bd
--- /dev/null
+++ b/WIP.md
@@ -0,0 +1,233 @@
+# AI Analysis WIP
+
+## User Need
+
+The application is adding AI analysis for Red Alert 3 replay operation logs. The current flow sends player information and a compacted operation log to a chat-completion-compatible LLM, then displays the analysis in `AIChatPanel`.
+
+The main goals are:
+
+- Improve the current system prompt.
+- Make the system prompt configurable by the user.
+- Reduce AI analysis errors, especially errors caused by general-world assumptions or overconfident UnitId guesses.
+- Add a validation path for LLM output so wrong claims can be detected and corrected without wasting all prior reasoning.
+
+## Current Code Areas
+
+- `Utils/AIAnalyze.cs`: builds the system prompt, user prompts, segment prompts, final summary prompts, and performs OpenAI-compatible chat completion calls.
+- `AIChatPanel.xaml.cs`: runs the analysis workflow, displays streaming chunks, retries failed segments, and now logs machine-readable claim validation results.
+- `Utils/AiSettings.cs`: stores AI provider/model settings and now prompt settings.
+- `AIProviderSettingsControl.xaml(.cs)`: edits provider/model settings and now prompt settings.
+- `EventDump.xaml.cs`: generates the replay operation text and starts AI analysis.
+- `Utils/AIAnalysisValidation.cs`: new validation model and parser for machine-readable AI claims.
+- `CONTEXT.md`: glossary for the AI analysis domain.
+
+## Discussion Notes
+
+### Prompt Problems
+
+The current prompt has a lot of useful game knowledge, but the LLM can still:
+
+- Use common sense that is wrong for the game or mod.
+- Assume infantry, helicopters, transports, amphibious movement, and water placement work like they do in other RTS games.
+- Treat one observed skill as conclusive evidence when multiple units share that skill.
+- Overstate UnitId guesses.
+
+Examples discussed:
+
+- Only units explicitly marked amphibious can move on both land and water.
+- Only units explicitly marked as passenger transports can transport infantry.
+- Building water placement depends on game rules, not common assumptions.
+- `SpecialPower_UnpackReplaceSelf` does not uniquely identify an Allied MCV because Allied miners can also unpack into a command hub.
+- A UnitId claimed as an aircraft should be challenged if the same UnitId is observed using an unpack/deploy skill.
+- A UnitId claimed as a bomber should be challenged if it is operated before the player starts producing their first bomber.
+
+### Prompt Decisions
+
+The default prompt should explicitly require:
+
+- Evidence-first analysis.
+- No use of external common sense over replay facts and supplied game rules.
+- UnitId guesses with evidence levels.
+- Multiple candidates when a behavior has several possible sources.
+- Support evidence and possible counter-evidence for important claims.
+- Correction or abandonment of claims contradicted by replay facts.
+
+Evidence levels currently used:
+
+- confirmed
+- highly likely
+- possible
+- uncertain
+- ruled out
+
+The default provider temperature was lowered from `0.75` to `0.35` because this task is closer to audit/reconstruction than creative writing.
+
+### Prompt Configuration Decisions
+
+The prompt is now configurable through AI settings.
+
+The design has two prompt layers:
+
+- A built-in dynamic system prompt, still assembled from replay/mod/faction/map context.
+- User prompt settings:
+  - optional full custom system prompt
+  - additional rules appended to the final system prompt
+
+This keeps the normal path safe while allowing advanced users to override the whole prompt.
+
+### Validation Philosophy
+
+LLM natural-language analysis should not be treated as directly valid. The plan is to validate structured claims emitted by the LLM.
+
+Important decision:
+
+- Do not immediately throw away a whole analysis when a problem is found.
+- Do not show the user two competing analyses or apology text such as "sorry, my previous answer was wrong."
+- Prefer a hidden revision pass: send the draft, validation issues, and relevant replay facts back to the AI, asking it to output a clean corrected version without mentioning the revision.
+- Limit retries/revisions. If the model still cannot resolve a claim, downgrade confidence or mark it uncertain instead of looping forever.
+
+Severity model:
+
+- `Info`: useful diagnostic only.
+- `WeakEvidence`: claim may be plausible but lacks enough support.
+- `Warning`: malformed or questionable claim that should be logged or possibly revised.
+- `Contradiction`: claim conflicts with replay facts or game rules and should trigger revision.
+- `Fatal`: output cannot be used for the current phase, such as empty or unparseable required output.
+
+### JSON Format Decision
+
+We discussed whether to require JSON or use a simpler line-based format.
+
+Decision:
+
+- Use JSON for machine-readable claims.
+- Keep the schema small.
+- Make the parser tolerant.
+
+Reasoning:
+
+- JSON can naturally represent evidence arrays, alternatives, and needed confirmations.
+- A custom line format would be easier for a trivial parser but would become fragile once nested data is needed.
+- The app can tolerate partial or missing JSON by logging validation issues instead of failing the whole analysis.
+
+Current expected shape:
+
+```json
+{
+  "unitClaims": [
+    {
+      "unitId": 123,
+      "player": "PlayerA",
+      "claim": "AlliedMCV",
+      "evidenceLevel": "possible",
+      "evidence": ["8:30 使用 SpecialPower_UnpackReplaceSelf"],
+      "alternatives": ["AlliedMiner 展开后的指挥中心"],
+      "needsConfirmation": ["是否曾使用 SpecialPower_PackReplaceSelf", "后续是否作为建造者出现"]
+    }
+  ],
+  "eventClaims": [],
+  "timelineClaims": []
+}
+```
+
+The prompt asks the AI to output:
+
+```text
+[机器可读声明]
+```json
+{ ... }
+```
+```
+
+The parser first looks for the last fenced JSON block near `[机器可读声明]`, then falls back to the last `{...}` block.
+
+## Validation We Can Do
+
+### Implemented Now
+
+Format validation:
+
+- Missing machine-readable claims.
+- JSON parse failure.
+- Root value is not an object.
+
+Self-consistency validation:
+
+- Unit claim missing `unitId`.
+- Unit claim missing `claim`.
+- High-confidence UnitId guess without evidence.
+- Low-confidence UnitId guess without alternatives or needed confirmation.
+
+### Near-Term Validations
+
+These need replay facts extracted from `CommandChunk` or an intermediate fact index:
+
+- UnitId special power contradictions.
+- UnitId production timeline contradictions.
+- UnitId used as builder vs claimed as non-builder unit.
+- Claims that use game knowledge not present in rules, such as transport/amphibious/building-placement abilities.
+- Missing alternatives for ambiguous skills such as Allied unpack.
+
+### Suggested Fact Index
+
+Useful derived facts:
+
+- `UnitId -> first observed time`
+- `UnitId -> observed special powers`
+- `UnitId -> observed as builder`
+- `UnitId -> observed as production structure`
+- `Player -> first production time by asset id`
+- `Player -> selected UnitIds over time`
+- `Player -> tech/protocol choices`
+- `Player -> building placements by asset and position`
+
+## Current Progress
+
+Implemented:
+
+- Added `CONTEXT.md` glossary.
+- Added prompt settings:
+  - `AiPromptSettings`
+  - `UseCustomSystemPrompt`
+  - `CustomSystemPrompt`
+  - `AdditionalRules`
+- Added prompt editing UI to `AIProviderSettingsControl`.
+- Connected prompt settings from `EventDump` to `AIChatPanel` to `AIAnalyze`.
+- Split default prompt construction from prompt composition.
+- Strengthened default prompt with evidence-first and uncertainty rules.
+- Added machine-readable JSON claim instructions to system and segment prompts.
+- Added `Utils/AIAnalysisValidation.cs` with:
+  - evidence level enum
+  - machine-readable claim records
+  - validation issue records
+  - JSON extraction and parsing
+  - initial self-consistency checks
+- Added per-segment validation logging in `AIChatPanel`.
+
+Build status:
+
+- `dotnet build AnotherReplayReader.csproj --no-restore` succeeds.
+- Remaining warnings are existing nullable warnings in `AIAnalyze.cs` stream response handling and a `System.Text.Encoding.CodePages` support warning for `net461`.
+
+## Open Questions
+
+- Should AI natural-language output continue streaming live, or should content be buffered until validation and possible revision are complete?
+- Should reasoning chunks remain visible during hidden revision, or should only final content be shown?
+- How strict should missing machine-readable claims be?
+  - Current behavior: warning log only.
+  - Possible future behavior: one hidden repair request asking the model to append valid claims.
+- Should validation issues be visible by default, or only in an advanced/debug foldout?
+- How much game-unit knowledge should live in code versus prompt text?
+- Should the first verifier use hardcoded RA3/Corona knowledge, or should it load a small unit capability table from data files?
+
+## Suggested Next Steps
+
+1. Build a replay fact index from `CommandChunk`.
+2. Add first deterministic validation rules:
+   - ambiguous Allied unpack
+   - pack/unpack consistency
+   - UnitId used as builder
+   - first production time vs first operation time
+3. Decide whether to buffer per-segment content before display.
+4. Add one hidden revision pass for `Contradiction` issues.
+5. Add validation summary UI, such as "验证器发现并修正 N 个问题".