diff --git a/source/Falsy.d.ts b/source/Falsy.d.ts
deleted file mode 100644
index ecb62f3..0000000
--- a/source/Falsy.d.ts
+++ /dev/null
@@ -1 +0,0 @@
-export type Falsy = false | '' | 0 | null | undefined;
diff --git a/source/basic/Falsy.d.ts b/source/basic/Falsy.d.ts
new file mode 100644
index 0000000..c99517d
--- /dev/null
+++ b/source/basic/Falsy.d.ts
@@ -0,0 +1,17 @@
+/**
+ * A type representing all the values that are considered falsy in JavaScript.
+ *
+ * In JavaScript, falsy values are those that evaluate to `false` in a Boolean context.
+ * This type includes:
+ *
+ * - `false` : The Boolean false value.
+ * - `''` : An empty string.
+ * - `0`: The number zero.
+ * - `null`: The null value representing the absence of any value.
+ * - `undefined`: A value that indicates a variable has not been assigned a value.
+ *
+ * This type can be useful for defining variables, parameters, or return types that
+ * should only accept or return falsy values.
+ */
+
+export type Falsy = false | '' | 0 | null | undefined;
diff --git a/source/Primitive.d.ts b/source/basic/Primitive.d.ts
similarity index 100%
rename from source/Primitive.d.ts
rename to source/basic/Primitive.d.ts
diff --git a/source/basic/index.d.ts b/source/basic/index.d.ts
new file mode 100644
index 0000000..f02ac4e
--- /dev/null
+++ b/source/basic/index.d.ts
@@ -0,0 +1,2 @@
+export type { Falsy } from './Falsy';
+export type { Primitive } from './Primitive';
diff --git a/source/index.d.ts b/source/index.d.ts
new file mode 100644
index 0000000..9444bcd
--- /dev/null
+++ b/source/index.d.ts
@@ -0,0 +1 @@
+export * from './basic';