diff --git a/Services/AnthropicService.cs b/Services/AnthropicService.cs
index ae7c851..dc84d61 100644
--- a/Services/AnthropicService.cs
+++ b/Services/AnthropicService.cs
@@ -231,7 +231,9 @@ public partial class AnthropicService
             foreach (var block in content.EnumerateArray())
             {
                 var blockType = block.TryGetProperty("type", out var bt) ? bt.GetString() ?? "" : "";
-                if (blockType != "image" && blockType != "file") continue;
+                // "document" = Frontend-Format für PDFs (chat.js sendet type:'document' für non-image files).
+                // "file" = Legacy-Alias für Datei-Anhänge.
+                if (blockType != "image" && blockType != "file" && blockType != "document") continue;
 
                 var source = block.TryGetProperty("source", out var src) ? src : default;
                 if (source.ValueKind == JsonValueKind.Undefined) continue;