Nomad changes

docs/snippets/c/utils/vector_database_integration.md

@@ -0,0 +1,55 @@
+```c title="C"
+#include "kreuzberg.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+    const char *document_path = "document.pdf";
+    const char *document_id = "doc-001";
+
+    const char *config_json =
+        "{"
+        "\"chunking\": {"
+        "\"chunker_type\": \"character\","
+        "\"max_characters\": 512,"
+        "\"overlap\": 50,"
+        "\"embedding\": {"
+        "\"model\": {\"preset\": {\"name\": \"balanced\"}},"
+        "\"normalize\": true,"
+        "\"batch_size\": 32"
+        "}"
+        "}"
+        "}";
+
+    KREUZBERGExtractionConfig *config = kreuzberg_extraction_config_from_json(config_json);
+    if (!config) {
+        fprintf(stderr, "config parse failed (code %d): %s\n",
+                kreuzberg_last_error_code(),
+                kreuzberg_last_error_context());
+        return 1;
+    }
+
+    KREUZBERGExtractionResult *result =
+        kreuzberg_extract_file_sync(document_path, NULL, config);
+    if (!result) {
+        fprintf(stderr, "extraction failed (code %d): %s\n",
+                kreuzberg_last_error_code(),
+                kreuzberg_last_error_context());
+        kreuzberg_extraction_config_free(config);
+        return 1;
+    }
+
+    /* The chunks JSON array carries content + embedding + metadata for each
+       chunk. Pass this directly to your vector database client (pgvector,
+       Qdrant, Pinecone, etc.) along with the document_id as a metadata field. */
+    char *chunks_json = kreuzberg_extraction_result_chunks(result);
+    printf("document_id: %s\n", document_id);
+    printf("chunks (JSON, ready to upsert into a vector DB):\n%s\n",
+           chunks_json ? chunks_json : "[]");
+    kreuzberg_free_string(chunks_json);
+
+    kreuzberg_extraction_result_free(result);
+    kreuzberg_extraction_config_free(config);
+    return 0;
+}
+```