?? ?? tool_result preview ??? ???? golden workbook ??? ??

?? ??
- ??, ??, ?? ?? tool_result preview? ??? ??? ???? replacement state? ?? ??? ? ??? ??? ?? ??? ??
- XLSX ?? ?? ??? ?? ?? ?? workbook golden ??? ??? summary/dashboard/detail ??? ????? ??

?? ????
- AgentMessageInvariantHelper? synthetic tool_result preview ?? ??? ??? QueryPreviewContent? ?? ?? ?? ??? tool_use_id, tool_name, ??? content/output/error ?? preview? ????? ??
- BuildToolResultPreviewMap? ?? preview? ?? ???? ?? ?? synthetic preview? ?? ??? ??
- AgentMessageInvariantHelperTests? ??? preview? ?? long tool_result? synthetic preview? ???? ??? explicit preview ?? ?? ??? ?? ??
- AgentQueryContextBuilderTests? synthetic preview? query view ?? ? ?? ???? ???? ????? ??
- ExcelSkillGoldenWorkbookTests? ??? summary/dashboard/detail, formula, data validation, conditional formatting? ??? ?? ?? workbook? Needs work: none ? Repair guide: none? ????? ??
- README.md? docs/DEVELOPMENT.md? 2026-04-15 09:36 (KST) ?? ?? ??? ?? ??? ??

?? ??
- dotnet build src/AxCopilot/AxCopilot.csproj -c Release -v minimal -p:OutputPath=bin\\verify_preview_golden_finish\\ -p:IntermediateOutputPath=obj\\verify_preview_golden_finish\\ : ?? 0 / ?? 0
- dotnet test src/AxCopilot.Tests/AxCopilot.Tests.csproj -c Release -v minimal --filter "AgentMessageInvariantHelperTests|AgentQueryContextBuilderTests|AgentQueuedCommandProjectorTests|ExcelSkillGoldenWorkbookTests|ExcelSkillDashboardSummaryTests|PptxSkillGoldenDeckTests" -p:OutputPath=bin\\verify_preview_golden_finish_tests\\ -p:IntermediateOutputPath=obj\\verify_preview_golden_finish_tests\\ : ?? 10

src/AxCopilot/Services/Agent/AgentMessageInvariantHelper.cs

@@ -8,13 +8,17 @@ namespace AxCopilot.Services.Agent;
 /// </summary>
 internal static class AgentMessageInvariantHelper
 {
+    private const int SyntheticPreviewTextLimit = 280;
+
     public static Dictionary<string, string> BuildToolResultPreviewMap(IEnumerable<ChatMessage>? messages)
     {
         var previews = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
         if (messages == null)
             return previews;
 
-        foreach (var message in messages)
+        var bufferedMessages = messages as IList<ChatMessage> ?? messages.ToList();
+
+        foreach (var message in bufferedMessages)
         {
             if (string.IsNullOrWhiteSpace(message.QueryPreviewContent))
                 continue;
@@ -24,6 +28,16 @@ internal static class AgentMessageInvariantHelper
             previews[toolResultId] = message.QueryPreviewContent!;
         }
 
+        foreach (var message in bufferedMessages)
+        {
+            if (!TryGetToolResultId(message, out var toolResultId) || previews.ContainsKey(toolResultId))
+                continue;
+            if (!TryBuildSyntheticToolResultPreview(message, out var preview))
+                continue;
+
+            previews[toolResultId] = preview;
+        }
+
         return previews;
     }
 
@@ -164,4 +178,93 @@ internal static class AgentMessageInvariantHelper
             doc?.Dispose();
         }
     }
+
+    internal static bool TryBuildSyntheticToolResultPreview(ChatMessage message, out string preview)
+    {
+        preview = "";
+        if (!TryGetToolResultId(message, out var toolResultId))
+            return false;
+
+        var content = message.Content ?? "";
+        if (string.IsNullOrWhiteSpace(content))
+            return false;
+
+        try
+        {
+            using var doc = JsonDocument.Parse(content);
+            var root = doc.RootElement;
+            var toolName = root.TryGetProperty("tool_name", out var toolNameEl)
+                ? toolNameEl.GetString()
+                : null;
+            var previewText = ExtractPreviewText(root);
+            if (string.IsNullOrWhiteSpace(previewText))
+                previewText = "tool result available";
+
+            var payload = new Dictionary<string, object?>
+            {
+                ["type"] = "tool_result",
+                ["tool_use_id"] = toolResultId,
+                ["tool_name"] = toolName,
+                ["content"] = previewText
+            };
+
+            preview = JsonSerializer.Serialize(payload);
+            return true;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    private static string ExtractPreviewText(JsonElement root)
+    {
+        if (root.TryGetProperty("content", out var contentEl))
+        {
+            var preview = NormalizePreviewText(contentEl.ValueKind switch
+            {
+                JsonValueKind.String => contentEl.GetString() ?? "",
+                JsonValueKind.Object or JsonValueKind.Array => contentEl.GetRawText(),
+                JsonValueKind.Number or JsonValueKind.True or JsonValueKind.False => contentEl.ToString(),
+                _ => ""
+            });
+            if (!string.IsNullOrWhiteSpace(preview))
+                return preview;
+        }
+
+        if (root.TryGetProperty("output", out var outputEl))
+        {
+            var preview = NormalizePreviewText(outputEl.ValueKind switch
+            {
+                JsonValueKind.String => outputEl.GetString() ?? "",
+                JsonValueKind.Object or JsonValueKind.Array => outputEl.GetRawText(),
+                JsonValueKind.Number or JsonValueKind.True or JsonValueKind.False => outputEl.ToString(),
+                _ => ""
+            });
+            if (!string.IsNullOrWhiteSpace(preview))
+                return preview;
+        }
+
+        if (root.TryGetProperty("error", out var errorEl) && errorEl.ValueKind == JsonValueKind.String)
+            return NormalizePreviewText(errorEl.GetString() ?? "");
+
+        return "";
+    }
+
+    private static string NormalizePreviewText(string text)
+    {
+        if (string.IsNullOrWhiteSpace(text))
+            return "";
+
+        var collapsed = string.Join(" ", text
+            .Replace('\r', ' ')
+            .Replace('\n', ' ')
+            .Replace('\t', ' ')
+            .Split(' ', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries));
+
+        if (collapsed.Length <= SyntheticPreviewTextLimit)
+            return collapsed;
+
+        return collapsed[..(SyntheticPreviewTextLimit - 3)].TrimEnd() + "...";
+    }
 }