diff --git a/kotlin/list-ops/src/main/kotlin/ListExt.kt b/kotlin/list-ops/src/main/kotlin/ListExt.kt
new file mode 100644
index 0000000..7fb2615
--- /dev/null
+++ b/kotlin/list-ops/src/main/kotlin/ListExt.kt
@@ -0,0 +1,27 @@
+fun <T> List<T>.customAppend(inpList: List<T>): List<T>{
+    return emptyList<T>()
+}
+
+fun <T> List<List<T>>.customConcat(): List<T>{
+    return emptyList<T>()
+}
+
+fun <T> List<T>.customFilter(inpFunc: (T) -> Boolean): List<T>{
+    return emptyList<T>()
+}
+
+fun <T> List<T>.customSize() : Int{
+    return 0
+}
+
+fun <T> List<T>.customReverse(): List<T>{
+    return emptyList<T>()
+}
+
+fun <T> List<T>.customFoldLeft(acc: T, inpFunc: (T, T) -> T): List<T>{
+    return emptyList<T>()
+}
+
+fun <T> List<T>.customFoldRight(acc: T, inpFunc: (T, T) -> T): List<T>{
+    return emptyList<T>()
+}
\ No newline at end of file