diff --git a/packages/happy-app/sources/components/markdown/MermaidRenderer.tsx b/packages/happy-app/sources/components/markdown/MermaidRenderer.tsx
index 290d48854..1252df2ae 100644
--- a/packages/happy-app/sources/components/markdown/MermaidRenderer.tsx
+++ b/packages/happy-app/sources/components/markdown/MermaidRenderer.tsx
@@ -1,9 +1,11 @@
 import * as React from 'react';
-import { View, Platform, Text } from 'react-native';
+import { View, Platform, Text, Pressable } from 'react-native';
 import { WebView } from 'react-native-webview';
 import { StyleSheet, useUnistyles } from 'react-native-unistyles';
 import { Typography } from '@/constants/Typography';
 import { t } from '@/text';
+import * as Clipboard from 'expo-clipboard';
+import { Modal } from '@/modal';
 
 // Style for Web platform
 const webStyle: any = {
@@ -20,6 +22,26 @@ export const MermaidRenderer = React.memo((props: {
     const { theme } = useUnistyles();
     const [dimensions, setDimensions] = React.useState({ width: 0, height: 200 });
     const [svgContent, setSvgContent] = React.useState<string | null>(null);
+    const [isHovered, setIsHovered] = React.useState(false);
+
+    const copyMermaidSource = React.useCallback(async () => {
+        try {
+            await Clipboard.setStringAsync(props.content);
+            Modal.alert(t('common.success'), t('markdown.mermaidCopied'), [{ text: t('common.ok'), style: 'cancel' }]);
+        } catch (error) {
+            console.error('Failed to copy mermaid source:', error);
+            Modal.alert(t('common.error'), t('markdown.copyFailed'), [{ text: t('common.ok'), style: 'cancel' }]);
+        }
+    }, [props.content]);
+
+    // Reusable copy button component
+    const renderCopyButton = (visible: boolean) => (
+        <View style={[style.copyButtonWrapper, visible && style.copyButtonWrapperVisible]}>
+            <Pressable style={style.copyButton} onPress={copyMermaidSource}>
+                <Text style={style.copyButtonText}>{t('common.copy')}</Text>
+            </Pressable>
+        </View>
+    );
 
     const onLayout = React.useCallback((event: any) => {
         const { width } = event.nativeEvent.layout;
@@ -93,12 +115,19 @@ export const MermaidRenderer = React.memo((props: {
         }
 
         return (
-            <View style={style.container}>
+            <View
+                style={style.container}
+                // @ts-ignore - Web only events
+                onMouseEnter={() => setIsHovered(true)}
+                // @ts-ignore - Web only events
+                onMouseLeave={() => setIsHovered(false)}
+            >
                 {/* @ts-ignore - Web only */}
                 <div
                     style={webStyle}
                     dangerouslySetInnerHTML={{ __html: svgContent }}
                 />
+                {renderCopyButton(isHovered)}
             </View>
         );
     }
@@ -164,6 +193,7 @@ export const MermaidRenderer = React.memo((props: {
                         }
                     }}
                 />
+                {renderCopyButton(true)}
             </View>
         </View>
     );
@@ -173,11 +203,13 @@ const style = StyleSheet.create((theme) => ({
     container: {
         marginVertical: 8,
         width: '100%',
+        position: 'relative',
     },
     innerContainer: {
         width: '100%',
         backgroundColor: theme.colors.surfaceHighest,
         borderRadius: 8,
+        position: 'relative',
     },
     loadingContainer: {
         justifyContent: 'center',
@@ -215,4 +247,32 @@ const style = StyleSheet.create((theme) => ({
         fontSize: 14,
         lineHeight: 20,
     },
+    copyButtonWrapper: {
+        position: 'absolute',
+        top: 8,
+        right: 8,
+        opacity: 0,
+        zIndex: 10,
+        elevation: 10,
+        pointerEvents: 'none',
+    },
+    copyButtonWrapperVisible: {
+        opacity: 1,
+        pointerEvents: 'auto',
+    },
+    copyButton: {
+        backgroundColor: theme.colors.surfaceHighest,
+        paddingHorizontal: 8,
+        paddingVertical: 4,
+        borderRadius: 4,
+        borderWidth: 1,
+        borderColor: theme.colors.divider,
+        cursor: 'pointer',
+    },
+    copyButtonText: {
+        ...Typography.default(),
+        color: theme.colors.text,
+        fontSize: 12,
+        lineHeight: 16,
+    },
 }));
diff --git a/packages/happy-app/sources/text/translations/ca.ts b/packages/happy-app/sources/text/translations/ca.ts
index 76d928500..903617a4b 100644
--- a/packages/happy-app/sources/text/translations/ca.ts
+++ b/packages/happy-app/sources/text/translations/ca.ts
@@ -783,6 +783,7 @@ export const ca: TranslationStructure = {
         codeCopied: 'Codi copiat',
         copyFailed: 'Error al copiar',
         mermaidRenderFailed: 'Error al renderitzar el diagrama mermaid',
+        mermaidCopied: 'Codi font de Mermaid copiat',
     },
 
     artifacts: {
diff --git a/packages/happy-app/sources/text/translations/en.ts b/packages/happy-app/sources/text/translations/en.ts
index 6329b24eb..8b53a58fa 100644
--- a/packages/happy-app/sources/text/translations/en.ts
+++ b/packages/happy-app/sources/text/translations/en.ts
@@ -798,6 +798,7 @@ export const en: TranslationStructure = {
         codeCopied: 'Code copied',
         copyFailed: 'Failed to copy',
         mermaidRenderFailed: 'Failed to render mermaid diagram',
+        mermaidCopied: 'Mermaid source copied',
     },
 
     artifacts: {
diff --git a/packages/happy-app/sources/text/translations/es.ts b/packages/happy-app/sources/text/translations/es.ts
index 41c17664e..a2b4e8b25 100644
--- a/packages/happy-app/sources/text/translations/es.ts
+++ b/packages/happy-app/sources/text/translations/es.ts
@@ -783,6 +783,7 @@ export const es: TranslationStructure = {
         codeCopied: 'Código copiado',
         copyFailed: 'Error al copiar',
         mermaidRenderFailed: 'Error al renderizar el diagrama mermaid',
+        mermaidCopied: 'Código fuente de Mermaid copiado',
     },
 
     artifacts: {
diff --git a/packages/happy-app/sources/text/translations/it.ts b/packages/happy-app/sources/text/translations/it.ts
index 6dbfb52ac..25432d8ea 100644
--- a/packages/happy-app/sources/text/translations/it.ts
+++ b/packages/happy-app/sources/text/translations/it.ts
@@ -812,6 +812,7 @@ export const it: TranslationStructure = {
         codeCopied: 'Codice copiato',
         copyFailed: 'Copia non riuscita',
         mermaidRenderFailed: 'Impossibile renderizzare il diagramma mermaid',
+        mermaidCopied: 'Codice sorgente Mermaid copiato',
     },
 
     artifacts: {
diff --git a/packages/happy-app/sources/text/translations/ja.ts b/packages/happy-app/sources/text/translations/ja.ts
index 090480d7a..98c222932 100644
--- a/packages/happy-app/sources/text/translations/ja.ts
+++ b/packages/happy-app/sources/text/translations/ja.ts
@@ -815,6 +815,7 @@ export const ja: TranslationStructure = {
         codeCopied: 'コードをコピーしました',
         copyFailed: 'コピーに失敗しました',
         mermaidRenderFailed: 'Mermaidダイアグラムのレンダリングに失敗しました',
+        mermaidCopied: 'Mermaidソースコードをコピーしました',
     },
 
     artifacts: {
diff --git a/packages/happy-app/sources/text/translations/pl.ts b/packages/happy-app/sources/text/translations/pl.ts
index 55401af6a..152e50ef5 100644
--- a/packages/happy-app/sources/text/translations/pl.ts
+++ b/packages/happy-app/sources/text/translations/pl.ts
@@ -793,6 +793,7 @@ export const pl: TranslationStructure = {
         codeCopied: 'Kod skopiowany',
         copyFailed: 'Błąd kopiowania',
         mermaidRenderFailed: 'Nie udało się wyświetlić diagramu mermaid',
+        mermaidCopied: 'Kod źródłowy Mermaid skopiowany',
     },
 
     artifacts: {
diff --git a/packages/happy-app/sources/text/translations/pt.ts b/packages/happy-app/sources/text/translations/pt.ts
index 75d9afed2..e233d99c1 100644
--- a/packages/happy-app/sources/text/translations/pt.ts
+++ b/packages/happy-app/sources/text/translations/pt.ts
@@ -783,6 +783,7 @@ export const pt: TranslationStructure = {
         codeCopied: 'Código copiado',
         copyFailed: 'Falha ao copiar',
         mermaidRenderFailed: 'Falha ao renderizar diagrama mermaid',
+        mermaidCopied: 'Código fonte Mermaid copiado',
     },
 
     artifacts: {
diff --git a/packages/happy-app/sources/text/translations/ru.ts b/packages/happy-app/sources/text/translations/ru.ts
index 930474bb7..59366feef 100644
--- a/packages/happy-app/sources/text/translations/ru.ts
+++ b/packages/happy-app/sources/text/translations/ru.ts
@@ -793,6 +793,7 @@ export const ru: TranslationStructure = {
         codeCopied: 'Код скопирован',
         copyFailed: 'Ошибка копирования',
         mermaidRenderFailed: 'Не удалось отобразить диаграмму mermaid',
+        mermaidCopied: 'Исходный код Mermaid скопирован',
     },
 
     artifacts: {
diff --git a/packages/happy-app/sources/text/translations/zh-Hans.ts b/packages/happy-app/sources/text/translations/zh-Hans.ts
index a9db3ead3..e13e55d65 100644
--- a/packages/happy-app/sources/text/translations/zh-Hans.ts
+++ b/packages/happy-app/sources/text/translations/zh-Hans.ts
@@ -785,6 +785,7 @@ export const zhHans: TranslationStructure = {
         codeCopied: '代码已复制',
         copyFailed: '复制失败',
         mermaidRenderFailed: '渲染 mermaid 图表失败',
+        mermaidCopied: 'Mermaid 源码已复制',
     },
 
     artifacts: {
diff --git a/packages/happy-app/sources/text/translations/zh-Hant.ts b/packages/happy-app/sources/text/translations/zh-Hant.ts
index e09ca6f3c..4a3e23a4d 100644
--- a/packages/happy-app/sources/text/translations/zh-Hant.ts
+++ b/packages/happy-app/sources/text/translations/zh-Hant.ts
@@ -784,6 +784,7 @@ export const zhHant: TranslationStructure = {
         codeCopied: '程式碼已複製',
         copyFailed: '複製失敗',
         mermaidRenderFailed: '渲染 mermaid 圖表失敗',
+        mermaidCopied: 'Mermaid 原始碼已複製',
     },
 
     artifacts: {