From 473036c739739d3501a4b6b28ba9de00a7d7433e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Peer=20Sch=C3=BCtt?=
 <20603780+peerschuett@users.noreply.github.com>
Date: Tue, 10 Jun 2025 14:29:18 +0200
Subject: [PATCH] Removed `<think>` tags from text processing in reasoning
 models and updated related components.

---
 .../Chat/ContentBlockComponent.razor                   |  4 ++--
 app/MindWork AI Studio/Chat/ContentText.cs             |  2 ++
 app/MindWork AI Studio/Chat/StringExtension.cs         | 10 ++++++----
 app/MindWork AI Studio/wwwroot/changelog/v0.9.48.md    |  1 +
 4 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/app/MindWork AI Studio/Chat/ContentBlockComponent.razor b/app/MindWork AI Studio/Chat/ContentBlockComponent.razor
index f0bfcd71..07db41eb 100644
--- a/app/MindWork AI Studio/Chat/ContentBlockComponent.razor	
+++ b/app/MindWork AI Studio/Chat/ContentBlockComponent.razor	
@@ -67,12 +67,12 @@
                             @if (this.Content.IsStreaming)
                             {
                                 <MudText Typo="Typo.body1" Style="white-space: pre-wrap;">
-                                    @textContent.Text
+                                    @textContent.Text.RemoveThinkTags()
                                 </MudText>
                             }
                             else
                             {
-                                <MudMarkdown Value="@textContent.Text.RemoveThinkTags()" OverrideHeaderTypo="@Markdown.OverrideHeaderTypo" CodeBlockTheme="@this.CodeColorPalette"/>
+                                <MudMarkdown Value="@textContent.Text.RemoveThinkTags().Trim()" OverrideHeaderTypo="@Markdown.OverrideHeaderTypo" CodeBlockTheme="@this.CodeColorPalette"/>
                             }
                         }
                     }
diff --git a/app/MindWork AI Studio/Chat/ContentText.cs b/app/MindWork AI Studio/Chat/ContentText.cs
index 13d8f3ce..590bef35 100644
--- a/app/MindWork AI Studio/Chat/ContentText.cs	
+++ b/app/MindWork AI Studio/Chat/ContentText.cs	
@@ -119,6 +119,8 @@ public sealed class ContentText : IContent
             this.InitialRemoteWait = false;
             this.IsStreaming = false;
         }, token);
+
+        this.Text = this.Text.RemoveThinkTags().Trim();
         
         // Inform the UI that the streaming is done:
         await this.StreamingDone();
diff --git a/app/MindWork AI Studio/Chat/StringExtension.cs b/app/MindWork AI Studio/Chat/StringExtension.cs
index 7eef7841..d229a0b4 100644
--- a/app/MindWork AI Studio/Chat/StringExtension.cs	
+++ b/app/MindWork AI Studio/Chat/StringExtension.cs	
@@ -4,13 +4,15 @@ public static class StringExtensions
 {
     public static string RemoveThinkTags(this string input)
     {
-        if (string.IsNullOrEmpty(input) || !input.StartsWith("<think>"))
+        const string OPEN_TAG = "<think>";
+        const string CLOSE_TAG = "</think>";
+        if (string.IsNullOrEmpty(input) || !input.StartsWith(OPEN_TAG))
             return input;
         
-        int endIndex = input.IndexOf("</think>");
+        var endIndex = input.IndexOf(CLOSE_TAG, StringComparison.Ordinal);
         if (endIndex == -1)
-            return input;
+            return string.Empty;
         
-        return input.Substring(endIndex + "</think>".Length);
+        return input[(endIndex + CLOSE_TAG.Length)..];
     }
 }
\ No newline at end of file
diff --git a/app/MindWork AI Studio/wwwroot/changelog/v0.9.48.md b/app/MindWork AI Studio/wwwroot/changelog/v0.9.48.md
index 11526d08..b2500c67 100644
--- a/app/MindWork AI Studio/wwwroot/changelog/v0.9.48.md	
+++ b/app/MindWork AI Studio/wwwroot/changelog/v0.9.48.md	
@@ -1 +1,2 @@
 # v0.9.48, build 223 (2025-06-xx xx:xx UTC)
+- Removed `<think>` tags from streaming and final text output because of reasoning models.
\ No newline at end of file