diff --git a/packages/core/src/registry/formats.ts b/packages/core/src/registry/formats.ts
index 2f0a111..9d6b222 100644
--- a/packages/core/src/registry/formats.ts
+++ b/packages/core/src/registry/formats.ts
@@ -1,7 +1,9 @@
 export const TEXT_EXTENSIONS = [
   'txt', 'json', 'js', 'mjs', 'cjs', 'css', 'java', 'py',
   'html', 'htm', 'jsx', 'ts', 'tsx', 'xml', 'log', 'vue',
-  'yaml', 'yml', 'ini', 'sh', 'bash', 'sql', 'go', 'rs', 'diff',
+  'yaml', 'yml', 'ini', 'sh', 'bash', 'sql', 'go', 'rs',
+  'diff', 'patch', 'bundle', 'bdl',
 ] as const;
 
 export const DRAWING_EXTENSIONS = [
-  'drawio', 'dio', 'excalidraw',
+  'drawio', 'dio', 'excalidraw', 'mermaid', 'mmd', 'plantuml', 'puml',
 ] as const;
diff --git a/apps/viewer-demo/src/components/HelloWorld.vue b/apps/viewer-demo/src/components/HelloWorld.vue
index 8eac333..a071444 100644
--- a/apps/viewer-demo/src/components/HelloWorld.vue
+++ b/apps/viewer-demo/src/components/HelloWorld.vue
@@ -135,7 +135,11 @@ const sampleGroups: SampleGroup[] = [
     family: 'drawing',
     items: [
       { name: 'XMind 脑图', url: '/example/mindmap.xmind' },
+      { name: 'Mermaid 架构图', url: '/example/architecture.mermaid' },
+      { name: 'PlantUML 时序图', url: '/example/sequence.plantuml' },
       { name: 'Excalidraw', url: '/example/flow.excalidraw' },
       { name: 'draw.io', url: '/example/process.drawio' }
     ]
   },