diff --git a/src/lib/server/ai/image-preprocess.ts b/src/lib/server/ai/image-preprocess.ts
index 3b51d0f..f69a91f 100644
--- a/src/lib/server/ai/image-preprocess.ts
+++ b/src/lib/server/ai/image-preprocess.ts
@@ -1,4 +1,4 @@
-import sharp from 'sharp';
+import type SharpType from 'sharp';
 
 const MAX_EDGE = 1600;
 const JPEG_QUALITY = 85;
@@ -8,10 +8,20 @@ export type PreprocessedImage = {
   mimeType: 'image/jpeg';
 };
 
+// Dynamic import: adapter-node bundelt server-code via Rollup/@rollup/plugin-commonjs,
+// und das packt sharp's dynamic-require fuer die native Plattform-.node-Binary
+// kaputt ins Bundle. Mit import() via Vite's Hint-Kommentar kann Rollup sharp
+// nicht auflösen und laesst es zur Laufzeit regulaer aus node_modules laden.
+async function loadSharp(): Promise<typeof SharpType> {
+  const mod = await import(/* @vite-ignore */ 'sharp');
+  return (mod as unknown as { default: typeof SharpType }).default ?? (mod as unknown as typeof SharpType);
+}
+
 // Resize auf max 1600px lange Kante, JPEG re-encode, Metadata strippen.
 // sharp liest HEIC/HEIF transparent, wenn libheif im libvips-Build enthalten ist
 // (in Alpine's vips-dev + in den offiziellen sharp-Prebuilds).
 export async function preprocessImage(input: Buffer): Promise<PreprocessedImage> {
+  const sharp = await loadSharp();
   const pipeline = sharp(input, { failOn: 'error' }).rotate(); // respect EXIF orientation
   const meta = await pipeline.metadata();
   if (!meta.width || !meta.height) {