diff --git a/packages/client/index.ts b/packages/client/index.ts
index d2535b1..624662f 100644
--- a/packages/client/index.ts
+++ b/packages/client/index.ts
@@ -1,3 +1,11 @@
+/**
+ * @module
+ * LINE SelfBot Client
+ */
+
+/**
+ * @description LINE SelfBot Client
+ */
 export class Client {
     constructor() {
         throw new Error("not impl")
diff --git a/packages/utils/obs/index.ts b/packages/utils/obs/index.ts
index 36433e8..68a8052 100644
--- a/packages/utils/obs/index.ts
+++ b/packages/utils/obs/index.ts
@@ -3,7 +3,7 @@
  * Utility for LINE OBS
  */
 
-import { ALL_STRING, WEB_SCHEME_PREFIX } from "../common/types.ts";
+import type { ALL_STRING, WEB_SCHEME_PREFIX } from "../common/types.ts";
 
 type LINE_OBS_PREFIX =
 	| "obs://"
@@ -12,19 +12,34 @@ type LINE_OBS_PREFIX =
 	| WEB_SCHEME_PREFIX<"obs.line-apps.com/">
 	| ALL_STRING;
 
+/**
+ * @description LINE Obs Utility
+ */
 class LINE_OBS_BASE {
 	constructor(
 		public prefix: LINE_OBS_PREFIX = "obs://",
 	) {}
 
+    /**
+     * @param hash {string} obs hash
+     * @returns line-obs url
+     */
 	public createURI(hash: string): string {
 		return this.prefix + hash;
 	}
 
+    /**
+     * @param mid {string} user mid
+     * @returns line-obs profile-image url
+     */
 	public createProfileImage(mid: string): string {
 		return this.prefix + "os/p/" + mid;
 	}
 
+    /**
+     * @param gid {string} group id
+     * @returns line-obs group-image url
+     */
 	public createGroupImage(gid: string): string {
 		return this.prefix + "os/g/" + gid;
 	}
diff --git a/packages/utils/scheme/index.ts b/packages/utils/scheme/index.ts
index 1b72240..7e92c58 100644
--- a/packages/utils/scheme/index.ts
+++ b/packages/utils/scheme/index.ts
@@ -3,7 +3,7 @@
  * Utility for LINE Scheme URI
  */
 
-import { ALL_STRING, WEB_SCHEME_PREFIX } from "../common/types.ts";
+import type { ALL_STRING, WEB_SCHEME_PREFIX } from "../common/types.ts";
 
 type LINE_SCHEME_PREFIX =
 	| "line://"
@@ -11,15 +11,24 @@ type LINE_SCHEME_PREFIX =
 	| WEB_SCHEME_PREFIX<"line.naver.jp/R/">
 	| ALL_STRING;
 
+/**
+ * @description LINE Scheme Utility
+ */
 class LINE_SCHEME_BASE {
 	constructor(
 		public prefix: LINE_SCHEME_PREFIX = "line://",
 	) {}
 
+	/**
+     * @returns home url
+     */
 	public getHome(): string {
 		return this.prefix + "home";
 	}
 
+	/**
+     * @returns user profile setting url
+     */
 	public getProfile(): string {
 		return this.prefix + "profile";
 	}