diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ccdc38d..29a109f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -36,6 +36,8 @@ jobs:
 
           cd R1 && echo "R1"
 
+          bash test_completion.sh
+
           git pad list || true
           git pad status || true
           git pad remote || true
diff --git a/README.md b/README.md
index 0aa109b..b149344 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ that uses custom refs(`refs/issues/latest`, `refs/remote/$REMOTE/issues/latest`)
 
 * Philosophy
 * Design
+* Install
 * Usage
 * Implementation Detail
 * Related Projects
@@ -59,15 +60,37 @@ that uses custom refs(`refs/issues/latest`, `refs/remote/$REMOTE/issues/latest`)
 * Freedom to customize
   * You can use pre-commit, post-commit hooks.
     * eg. Use AI API to polish issues
+
+## Install <small><sup>[▲](#table-of-contents)</sup></small>
+
+* run the following in bash(or zsh)
+
+```
+git clone https://github.com/kwhkim/git-pad.git
+cd git-pad
+bash install.sh
+```
+
+Script above will add the line similar to the following to ~/.bashrc or ~/.zschrc depending on OS
+
+```
+## git-pad
+PATH=$PATH:/home/user/git/git-pad;
+export PATH;
+source /home/user/git/git-pad/autocompletion.sh;
+```
+
+Delete them to uninstall.
   
 ## Usage <small><sup>[▲](#table-of-contents)</sup></small>
 
 ```{bash}
-# Install
+# Quick-setup or run install.sh above
 git clone https://github.com/kwhkim/git-pad.git
 cd git-pad
 PATH=$PATH:$(pwd)  # replace $(pwd) with the directory name where git-pad, git-pad-utils live
 
+# get to the project directory and test git-pad
 cd $GIT_PROJECT_PATH
 git pad init # or git pad clone if there is already remote 
 git pad list
@@ -164,6 +187,8 @@ git pad list
 
 ## To-Dos <small><sup>[▲](#table-of-contents)</sup></small>
 
+* ~~auto-completion~~ : enable <TAB> after `git pad` or `git pad edit`
+
 * Different Template for Issue types
   * Current, only one `TEMPLATE.md` for all issues
     * possibly, `git pad new --type=bug` to specify the type and the template.
diff --git a/install.sh b/install.sh
new file mode 100644
index 0000000..3bc121e
--- /dev/null
+++ b/install.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+# shellcheck disable=SC2016
+if [ ! -f "git-pad" ] || [ ! -f "autocompletion.sh" ]; then
+  echo '!E: Not in git-pad directory';
+  exit 1
+fi
+
+block='
+## git-pad
+PATH=$PATH:'"$PWD"';
+export PATH;
+source '"$(realpath autocompletion.sh);"
+
+shell_name="$(basename "$SHELL")"
+
+case "$shell_name" in
+  bash) rc="$HOME/.bashrc" ;;
+  zsh)  rc="$HOME/.zshrc" ;;
+  *) echo "Unsupported shell"; exit 1 ;;
+esac
+
+grep -q '## git-pad' "$rc" 2>/dev/null || echo "$block" >> "$rc"
\ No newline at end of file