Add per-answer thinking disclosure

app/MindWork AI Studio/Provider/Anthropic/AnthropicResponse.cs

@@ -36,6 +36,13 @@ public sealed record AnthropicResponse
         .Where(x => ReadString(x, "type").Equals("text", StringComparison.Ordinal))
         .Select(x => ReadString(x, "text")));
 
+    /// <summary>
+    /// The human-readable thinking the model returned, with redacted blocks omitted.
+    /// </summary>
+    public string GetThinkingOutput() => string.Concat(this.Content
+        .Where(x => ReadString(x, "type").Equals("thinking", StringComparison.Ordinal))
+        .Select(x => ReadString(x, "thinking")));
+
     private static string ReadString(JsonElement item, string propertyName)
     {
         if (item.ValueKind is not JsonValueKind.Object ||
@@ -45,4 +52,4 @@ public sealed record AnthropicResponse
 
         return property.GetString() ?? string.Empty;
     }
-}
+}

app/MindWork AI Studio/Provider/Anthropic/AnthropicToolCallingAdapter.cs

@@ -55,6 +55,7 @@ public sealed class AnthropicToolCallingAdapter(Model chatModel, IList<IMessageB
         this.lastResponse = response;
         return new ToolCallingRound(
             response.GetTextOutput(),
+            response.GetThinkingOutput(),
             response.GetToolUses()
                 .Select(toolUse => new ToolCallingRequestedCall(
                     toolUse.Id,
@@ -85,4 +86,4 @@ public sealed class AnthropicToolCallingAdapter(Model chatModel, IList<IMessageB
         Content = content,
         IsError = isError,
     });
-}
+}

app/MindWork AI Studio/Provider/Anthropic/Delta.cs

@@ -6,4 +6,5 @@ namespace AIStudio.Provider.Anthropic;
 /// </summary>
 /// <param name="Type">The type of the delta.</param>
 /// <param name="Text">The text of the delta.</param>
-public readonly record struct Delta(string Type, string Text);
+/// <param name="Thinking">The human-readable thinking delta.</param>
+public readonly record struct Delta(string Type, string Text, string Thinking);

app/MindWork AI Studio/Provider/Anthropic/ResponseStreamLine.cs

@@ -10,10 +10,15 @@ namespace AIStudio.Provider.Anthropic;
 public readonly record struct ResponseStreamLine(string Type, int Index, Delta Delta) : IResponseStreamLine
 {
     /// <inheritdoc />
-    public bool ContainsContent() => this != default && !string.IsNullOrWhiteSpace(this.Delta.Text);
+    public bool ContainsContent() => this != default &&
+                                     (!string.IsNullOrEmpty(this.Delta.Text) || !string.IsNullOrEmpty(this.Delta.Thinking));
 
     /// <inheritdoc />
-    public ContentStreamChunk GetContent() => new(this.Delta.Text, []);
+    public ContentStreamChunk GetContent() => this.Delta.Type switch
+    {
+        "thinking_delta" => new(string.Empty, this.Delta.Thinking, []),
+        _ => new(this.Delta.Text, string.Empty, []),
+    };
 
     #region Implementation of IAnnotationStreamLine
 
@@ -29,4 +34,4 @@ public readonly record struct ResponseStreamLine(string Type, int Index, Delta D
     public IList<ISource> GetSources() => [];
 
     #endregion
-}
+}