Nomad changes

docs/snippets/wasm/plugins/pdf_only_processor.md

@@ -0,0 +1,71 @@
+# PDF-Only Post-Processor
+
+Register a post-processor that only processes PDF documents and filters others.
+
+```typescript title="WASM"
+import init, { registerPostProcessor, extractBytes } from "kreuzberg-wasm";
+
+await init();
+
+// Define a PDF-only post-processor
+const pdfOnlyProcessor = {
+  processingStage: () => "post-extraction",
+  process: (extractionResult) => {
+    // Check if this is a PDF extraction
+    const isPdf =
+      extractionResult.metadata?.mimeType === "application/pdf" ||
+      extractionResult.metadata?.source?.endsWith(".pdf");
+
+    if (!isPdf) {
+      // Skip processing for non-PDF documents
+      return extractionResult;
+    }
+
+    // Apply PDF-specific processing
+    const processed = {
+      ...extractionResult,
+      metadata: {
+        ...extractionResult.metadata,
+        pdfProcessed: true,
+        pageCount: extractionResult.metadata?.pageCount || 1,
+      },
+      // Normalize text for PDFs
+      text: (extractionResult.text || "")
+        .replace(/\n{3,}/g, "\n\n") // Remove excessive line breaks
+        .trim(),
+    };
+
+    return processed;
+  },
+};
+
+try {
+  registerPostProcessor(pdfOnlyProcessor);
+  console.log("PDF-only post-processor registered");
+} catch (error) {
+  console.error("Failed to register post-processor:", error);
+}
+
+// Test with various documents
+const testDocs = [
+  {
+    bytes: new Uint8Array([
+      /* PDF */
+    ]),
+    type: "application/pdf",
+  },
+  {
+    bytes: new Uint8Array([
+      /* HTML */
+    ]),
+    type: "text/html",
+  },
+];
+
+for (const doc of testDocs) {
+  const result = await extractBytes(doc.bytes, doc.type, {});
+  console.log(`${doc.type}: PDF-specific processing applied:`, result.metadata?.pdfProcessed);
+}
+```
+
+This processor applies PDF-specific transformations only to PDF documents.