diff --git a/CHANGELOG.md b/CHANGELOG.md
index 88f8337c..bc916eca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how
 * fix(lint): match behavior of declare linter to checkdoc (#272)
 * fix(test): ERT test fails on Emacs 30+ (cc1f4e15b7b40b986ad1a93f6e40d121340598de)
 * fix(test): eask options should not be passed to buttercup (#281)
+* feat(core): Lazy install on required packages (#284)
 
 ## 0.10.x
 > Released Jun 13, 2024
diff --git a/docs/content/Development-API/_index.en.md b/docs/content/Development-API/_index.en.md
index 31d4bc95..20aeb244 100644
--- a/docs/content/Development-API/_index.en.md
+++ b/docs/content/Development-API/_index.en.md
@@ -249,7 +249,7 @@ Initialize packages for use.
 
 Scope that temporary makes archives available.
 
-`ARCHIVES` can either be a string or a list of strings.
+The argument `ARCHIVES` can either be a string or a list of strings.
 
 ```elisp
 (eask-with-archives "melpa"
@@ -260,6 +260,21 @@ Scope that temporary makes archives available.
 💡 This is handy when you need certain packages from certain archives.
 {{< /hint >}}
 
+## 🔍 Function: eask-archive-install-packages (`archives` `names`)
+
+Install packages with archives setup.
+
+The arugment `names` can be a symbol or list of symbols.
+
+```elisp
+(eask-archive-install-packages '("gnu" "melpa")
+                               'el2org)  ; accept list
+```
+
+{{< hint info >}}
+💡 This only installs packages if they are missing.
+{{< /hint >}}
+
 ## 🔍 Function: eask-package-desc (`name` &optional `current`)
 
 Build package descriptor for a package.
@@ -975,7 +990,7 @@ Return size of the current package.
 Create execution with the responsive message output.
 
 ```elisp
-(eask-with-progress 
+(eask-with-progress
   "Downloading files... "
   (eask-with-verbosity 'debug  ; Often used with `eask-with-verbosity'
     ;; Execute some operations..
diff --git a/docs/content/Development-API/_index.zh-tw.md b/docs/content/Development-API/_index.zh-tw.md
index a7b9cc7f..90b3c8bf 100644
--- a/docs/content/Development-API/_index.zh-tw.md
+++ b/docs/content/Development-API/_index.zh-tw.md
@@ -246,7 +246,7 @@ $ eask init
 
 臨時使存檔可用的範圍。
 
-`ARCHIVES` 可以是字符串或字符串列表。
+參數 `archives` 可以是字串或字串列表。
 
 ```elisp
 (eask-with-archives "melpa"
@@ -254,7 +254,22 @@ $ eask init
 ```
 
 {{< hint info >}}
-💡 當您需要某些檔案中的某些包時，這很方便。
+💡 當您需要某些存檔中的特定套件時，這非常方便。
+{{< /hint >}}
+
+## 🔍 函式: eask-archive-install-packages (`archives` `names`)
+
+使用 archives 設定安裝套件。
+
+參數 `names` 可以是符號或符號列表。
+
+```elisp
+(eask-archive-install-packages '("gnu" "melpa")
+                               'el2org)  ; 接受列表
+```
+
+{{< hint info >}}
+💡 這只會在套件遺失時安裝套件。
 {{< /hint >}}
 
 ## 🔍 函式: eask-package-desc (`name` &optional `current`)
@@ -965,7 +980,7 @@ This will kill Emacs process.
 使用響應消息輸出創建執行。
 
 ```elisp
-(eask-with-progress 
+(eask-with-progress
   "檔案下載中s... "
   (eask-with-verbosity 'debug  ; 通常與 `eask-with-verbosity` 一起使用
     ;; 執行一些操作..