chore: import upstream snapshot with attribution

2026-07-13 13:24:08 +08:00
commit 0d3cb498a3
5438 changed files with 1316560 additions and 0 deletions
@@ -0,0 +1,78 @@
+const dedent = require('dedent');
+
+/**
+ * Detects MIME type from base64 magic numbers
+ *
+ * Note: This is duplicated from src/evaluatorHelpers.ts to keep the example
+ * self-contained and runnable without dependencies on core promptfoo internals.
+ *
+ * Magic numbers (base64-encoded file signatures):
+ * - JPEG: /9j/
+ * - PNG: iVBORw0KGgo
+ * - GIF: R0lGODlh or R0lGODdh
+ * - WebP: UklGR (RIFF)
+ * - BMP: Qk0 or Qk1
+ * - TIFF: SUkq or TU0A
+ * - ICO: AAABAA
+ */
+function getMimeTypeFromBase64(base64Data) {
+  if (base64Data.startsWith('/9j/')) {
+    return 'image/jpeg';
+  } else if (base64Data.startsWith('iVBORw0KGgo')) {
+    return 'image/png';
+  } else if (base64Data.startsWith('R0lGODlh') || base64Data.startsWith('R0lGODdh')) {
+    return 'image/gif';
+  } else if (base64Data.startsWith('UklGR')) {
+    return 'image/webp';
+  } else if (base64Data.startsWith('Qk0') || base64Data.startsWith('Qk1')) {
+    return 'image/bmp';
+  } else if (base64Data.startsWith('SUkq') || base64Data.startsWith('TU0A')) {
+    return 'image/tiff';
+  } else if (base64Data.startsWith('AAABAA')) {
+    return 'image/x-icon';
+  }
+  // Fallback to JPEG if no magic number is matched
+  return 'image/jpeg';
+}
+
+module.exports = (context) => {
+  return [
+    {
+      role: 'system',
+      content: dedent`
+        You are an AI assistant tasked with analyzing and classifying images. Your goal is to determine the type of clothing item depicted in the image and provide additional relevant information.
+
+        Please analyze the image and provide:
+        1. Classification (must be one of: T-shirt/top, Trouser, Pullover, Dress, Coat, Sandal, Shirt, Sneaker, Bag, Ankle boot)
+        2. Primary color or color scheme
+        3. Notable features or patterns
+        4. Approximate style or era (e.g., modern, vintage, classic)
+        5. Confidence level (1-10, where 1 is least confident and 10 is most confident)
+        6. Brief reasoning for the classification
+
+        Provide your response as a JSON object with the following structure:
+        {
+          "classification": string (one of the allowed categories),
+          "color": string,
+          "features": string,
+          "style": string,
+          "confidence": number (1-10),
+          "reasoning": string
+        }
+      `,
+    },
+    {
+      role: 'user',
+      content: [
+        {
+          type: 'image_url',
+          image_url: {
+            url: `data:${getMimeTypeFromBase64(context.vars.image_base64)};base64,${
+              context.vars.image_base64
+            }`,
+          },
+        },
+      ],
+    },
+  ];
+};