diff --git a/.gitignore b/.gitignore
index 85df344..27c37b2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,4 +8,4 @@ pgvector/
 snake_game/
 pacman_game/
 ai_videos.csv
-
+config.toml
diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
index 16353a6..5d9a1b5 100644
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -4,7 +4,7 @@
             "name": "Linux",
             "includePath": [
                 "${workspaceFolder}/**",
-                "${workspaceFolder}/liboai/include",
+                "${workspaceFolder}/src/liboai/include",
                 "/usr/include/poppler/cpp"
             ],
             "defines": [],
diff --git a/README.md b/README.md
index 5bb5223..a931777 100644
--- a/README.md
+++ b/README.md
@@ -96,6 +96,12 @@ cd mentals-ai
 
 **Configuration**
 
+Copy the sample configuration file:
+
+```shell
+cp config.toml.sample config.toml
+```
+
 Place your API key in the `config.toml` file:
 
 ```bash
diff --git a/config.toml b/config.toml.sample
similarity index 100%
rename from config.toml
rename to config.toml.sample
diff --git a/src/pgvector.cpp b/src/pgvector.cpp
index 6a18607..92954c9 100644
--- a/src/pgvector.cpp
+++ b/src/pgvector.cpp
@@ -162,8 +162,12 @@ expected<void, std::string> PgVector::write_content(
     );
     std::string name_value = name ? *name : "";
     std::string desc_value = desc ? *desc : "";
-    txn.exec_params(sql, content_id, name_value, desc_value, content, 
-        (std::ostringstream() << embedding).str());
+
+    std::ostringstream oss;
+    oss << embedding;
+    std::string embedding_str = oss.str();
+
+    txn.exec_params(sql, content_id, name_value, desc_value, content, embedding_str);
     unguard();
     return {};
 }
@@ -198,7 +202,12 @@ expected<json, std::string> PgVector::search_content(
         { "distance_function"   , CosineDistance        },
         { "limit"               , to_string(limit)      }
     }));
-    pqxx::result res = txn.exec_params(sql, (std::ostringstream() << search_vector).str());
+
+    std::ostringstream oss;
+    oss << search_vector;
+    std::string search_vector_str = oss.str();
+
+    pqxx::result res = txn.exec_params(sql, search_vector_str);
     txn.commit();
     json j_result = json::array();
     for (auto row : res) {