diff --git a/app/MindWork AI Studio/Assistants/I18N/allTexts.lua b/app/MindWork AI Studio/Assistants/I18N/allTexts.lua
index 6ac89cdc..f70ad3ff 100644
--- a/app/MindWork AI Studio/Assistants/I18N/allTexts.lua	
+++ b/app/MindWork AI Studio/Assistants/I18N/allTexts.lua	
@@ -2278,6 +2278,9 @@ UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::
 -- Kind
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T1073024099"] = "Kind"
 
+-- Stop build
+UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T1150899861"] = "Stop build"
+
 -- Running
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T1160324588"] = "Running"
 
@@ -2593,6 +2596,9 @@ UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::
 -- Audience expertise
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T4279519256"] = "Audience expertise"
 
+-- Stopping build...
+UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T4290803141"] = "Stopping build..."
+
 -- If you need help, report the problem and include the project ID.
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T4292361710"] = "If you need help, report the problem and include the project ID."
 
diff --git a/app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor b/app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor
index d31026c8..ed4423fb 100644
--- a/app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor	
+++ b/app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor	
@@ -228,6 +228,16 @@
                                     </span>
                                 </MudTooltip>
                             }
+                            @if (this.CurrentBuildSession?.IsActive == true)
+                            {
+                                <MudButton Variant="Variant.Filled"
+                                           Color="Color.Error"
+                                           StartIcon="@Icons.Material.Filled.Stop"
+                                           OnClick="@this.CancelCurrentBuildAsync"
+                                           Disabled="@this.IsCurrentBuildCanceling">
+                                    @(this.IsCurrentBuildCanceling ? T("Stopping build...") : T("Stop build"))
+                                </MudButton>
+                            }
                         </MudStack>
                     </MudForm>
 
diff --git a/app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor.Build.cs b/app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor.Build.cs
index 6a537fe4..91e08ab2 100644
--- a/app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor.Build.cs	
+++ b/app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor.Build.cs	
@@ -7,13 +7,20 @@ namespace AIStudio.Assistants.VisualBriefing;
 
 public partial class VisualBriefingAssistant
 {
+    /// <summary>
+    /// Gets the active or canceling build session for the selected briefing.
+    /// </summary>
+    private AssistantSessionSnapshot? CurrentBuildSession => this.selectedBriefing is null ? null : this.AssistantSessionService.TryGetSnapshot(CreateBuildSessionKey(this.selectedBriefing.BriefingId));
+
+    /// <summary>
+    /// Gets whether cancellation was already requested for the selected briefing build.
+    /// </summary>
+    private bool IsCurrentBuildCanceling => this.CurrentBuildSession?.Status is AssistantSessionStatus.CANCELING;
+
     /// <summary>
     /// Gets whether the selected revision cannot be recompiled without model calls.
     /// </summary>
-    private bool CannotRecompile => this.IsCurrentBusy ||
-                                    this.selectedBriefing is null ||
-                                    this.selectedRevisionId == Guid.Empty ||
-                                    !this.SelectedVersionSupportsEdits;
+    private bool CannotRecompile => this.IsCurrentBusy || this.selectedBriefing is null || this.selectedRevisionId == Guid.Empty || !this.SelectedVersionSupportsEdits;
 
     /// <summary>
     /// Defines <c>CannotGenerate</c> for the visual briefing feature.
@@ -106,7 +113,7 @@ public partial class VisualBriefingAssistant
         var generationProvider = this.provider;
         var generationProfile = this.profile;
 
-        var sessionKey = new AssistantSessionKey(ComponentKind.VISUAL_BRIEFING_ASSISTANT, briefingId.ToString("D"));
+        var sessionKey = CreateBuildSessionKey(briefingId);
         if (this.AssistantSessionService.TryGetSnapshot(sessionKey)?.IsActive == true)
             return;
 
@@ -140,12 +147,13 @@ public partial class VisualBriefingAssistant
             
             if (!generation.Success || generation.Version is null)
             {
-                this.reusableContentBuildId = generation.CanContinueAsRebuild
-                    ? generation.Diagnostics.BuildId
-                    : null;
+                terminalStatus = generation.FailureCode is VisualBriefingFailureCode.CANCELED ? AssistantSessionStatus.CANCELED : AssistantSessionStatus.FAILED;
+                this.reusableContentBuildId = generation.CanContinueAsRebuild ? generation.Diagnostics.BuildId : null;
 
                 terminalIssue = generation.Issue;
-                this.Snackbar.Add(generation.Issue, Severity.Error);
+                if (terminalStatus is not AssistantSessionStatus.CANCELED)
+                    this.Snackbar.Add(generation.Issue, Severity.Error);
+                
                 return;
             }
 
@@ -211,7 +219,7 @@ public partial class VisualBriefingAssistant
 
         var recompileBriefing = this.selectedBriefing;
         var briefingId = recompileBriefing.BriefingId;
-        var sessionKey = new AssistantSessionKey(ComponentKind.VISUAL_BRIEFING_ASSISTANT, briefingId.ToString("D"));
+        var sessionKey = CreateBuildSessionKey(briefingId);
         if (this.AssistantSessionService.TryGetSnapshot(sessionKey)?.IsActive == true)
             return;
 
@@ -241,8 +249,11 @@ public partial class VisualBriefingAssistant
 
             if (!result.Success || result.Version is null)
             {
+                terminalStatus = result.FailureCode is VisualBriefingFailureCode.CANCELED ? AssistantSessionStatus.CANCELED : AssistantSessionStatus.FAILED;
                 terminalIssue = result.Issue;
-                this.Snackbar.Add(result.Issue, Severity.Error);
+                if (terminalStatus is not AssistantSessionStatus.CANCELED)
+                    this.Snackbar.Add(result.Issue, Severity.Error);
+                
                 return;
             }
 
@@ -371,6 +382,22 @@ public partial class VisualBriefingAssistant
                 parentRevisionOverride: this.latestBuild.ParentRevisionId);
     }
 
+    /// <summary>
+    /// Requests cancellation for the build running on the selected briefing.
+    /// </summary>
+    private async Task CancelCurrentBuildAsync()
+    {
+        if (this.selectedBriefing is null)
+            return;
+
+        var sessionKey = CreateBuildSessionKey(this.selectedBriefing.BriefingId);
+        if (this.AssistantSessionService.TryGetSnapshot(sessionKey)?.Status is not AssistantSessionStatus.RUNNING)
+            return;
+
+        await this.AssistantSessionService.CancelAsync(sessionKey, this);
+        this.StateHasChanged();
+    }
+
     /// <summary>
     /// Gets the six UI groups for the eight durable build stages.
     /// </summary>
@@ -506,7 +533,11 @@ public partial class VisualBriefingAssistant
         if (this.generatingBriefings.Contains(briefingId))
             return true;
 
-        var key = new AssistantSessionKey(ComponentKind.VISUAL_BRIEFING_ASSISTANT, briefingId.ToString("D"));
-        return this.AssistantSessionService.TryGetSnapshot(key)?.IsActive == true;
+        return this.AssistantSessionService.TryGetSnapshot(CreateBuildSessionKey(briefingId))?.IsActive == true;
     }
+
+    /// <summary>
+    /// Creates the assistant-session key used by a visual briefing build.
+    /// </summary>
+    private static AssistantSessionKey CreateBuildSessionKey(Guid briefingId) => new(ComponentKind.VISUAL_BRIEFING_ASSISTANT, briefingId.ToString("D"));
 }
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Plugins/languages/de-de-43065dbc-78d0-45b7-92be-f14c2926e2dc/plugin.lua b/app/MindWork AI Studio/Plugins/languages/de-de-43065dbc-78d0-45b7-92be-f14c2926e2dc/plugin.lua
index 53877fe3..d931ab66 100644
--- a/app/MindWork AI Studio/Plugins/languages/de-de-43065dbc-78d0-45b7-92be-f14c2926e2dc/plugin.lua	
+++ b/app/MindWork AI Studio/Plugins/languages/de-de-43065dbc-78d0-45b7-92be-f14c2926e2dc/plugin.lua	
@@ -2280,6 +2280,9 @@ UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::
 -- Kind
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T1073024099"] = "Typ"
 
+-- Stop build
+UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T1150899861"] = "Erstellung stoppen"
+
 -- Running
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T1160324588"] = "Wird ausgeführt"
 
@@ -2595,6 +2598,9 @@ UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::
 -- Audience expertise
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T4279519256"] = "Fachkenntnisse der Zielgruppe"
 
+-- Stopping build...
+UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T4290803141"] = "Erstellung wird angehalten …"
+
 -- If you need help, report the problem and include the project ID.
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T4292361710"] = "Wenn Sie Hilfe benötigen, melden Sie das Problem und geben Sie die Projekt-ID an."
 
diff --git a/app/MindWork AI Studio/Plugins/languages/en-us-97dfb1ba-50c4-4440-8dfa-6575daf543c8/plugin.lua b/app/MindWork AI Studio/Plugins/languages/en-us-97dfb1ba-50c4-4440-8dfa-6575daf543c8/plugin.lua
index 27e64d11..84c7892a 100644
--- a/app/MindWork AI Studio/Plugins/languages/en-us-97dfb1ba-50c4-4440-8dfa-6575daf543c8/plugin.lua	
+++ b/app/MindWork AI Studio/Plugins/languages/en-us-97dfb1ba-50c4-4440-8dfa-6575daf543c8/plugin.lua	
@@ -2280,6 +2280,9 @@ UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::
 -- Kind
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T1073024099"] = "Kind"
 
+-- Stop build
+UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T1150899861"] = "Stop build"
+
 -- Running
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T1160324588"] = "Running"
 
@@ -2595,6 +2598,9 @@ UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::
 -- Audience expertise
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T4279519256"] = "Audience expertise"
 
+-- Stopping build...
+UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T4290803141"] = "Stopping build..."
+
 -- If you need help, report the problem and include the project ID.
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T4292361710"] = "If you need help, report the problem and include the project ID."