From bf772ed9f433d710ad3cb5cd55d6a82cf0f8daba Mon Sep 17 00:00:00 2001
From: "ry.yamafuji" <ry.yamafuji@gmail.com>
Date: Sun, 7 Dec 2025 18:38:04 +0900
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---
 README.md                  | 54 +++++++++++++++++++++++++++++++++++++-
 gas-sample/.clasp.json     | 16 +++++++++++
 gas-sample/Code.js         |  4 +++
 gas-sample/appsscript.json |  7 +++++
 readme/gcs.md              |  0
 5 files changed, 80 insertions(+), 1 deletion(-)
 create mode 100644 gas-sample/.clasp.json
 create mode 100644 gas-sample/Code.js
 create mode 100644 gas-sample/appsscript.json
 create mode 100644 readme/gcs.md

diff --git a/README.md b/README.md
index a0bdefd..d8eea06 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,55 @@
 # gas-common-dev
 
-Google Apps Scriptに関する共通ソース
+Google Apps Scriptに関する共通ソース
+
+## Develop
+
+Google Apps Script (GAS) は通常ブラウザのエディタで書きますが、
+VS Code でローカル開発 → GAS にデプロイ → ローカルである程度テストという流れも可能です。
+
+#### GASの開発に必要なもの
+
+* Node.js / npm
+* Google アカウント
+* clasp
+* VS Code
+
+#### 開発構築
+
+```sh
+# clasp をインストール
+npm install -g @google/clasp
+# GAS へのログイン
+clasp login
+# GASプロジェクトを作成する(JS)
+mkdir gas-sample
+cd gas-sample
+clasp create --type standalone --title "Sample GAS Project"
+# スプレッドシートの場合
+clasp create --type sheets --title "My Sheet Project"
+```
+
+作成されたCode.jsにソースを書きます
+
+Code.js
+```js
+function helloWorld() {
+  const sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
+  sheet.getRange(1, 1).setValue("Hello from JavaScript!");
+}
+```
+
+GASにデプロイする
+
+```sh
+clasp push
+# 強制
+# clasp push --force
+```
+
+デプロイしたプロジェクトをスプレッドシートと紐づける必要があります
+
+```sh
+clasp create --type sheets --title "My Sheet Project"
+```
+
diff --git a/gas-sample/.clasp.json b/gas-sample/.clasp.json
new file mode 100644
index 0000000..1d995a8
--- /dev/null
+++ b/gas-sample/.clasp.json
@@ -0,0 +1,16 @@
+{
+  "scriptId": "1JhI9GMgJpjI-ogbtfOFYCRhlMd3NnlkQs6dNuvS0JwyuwMPG8Wct-OuM",
+  "rootDir": "",
+  "scriptExtensions": [
+    ".js",
+    ".gs"
+  ],
+  "htmlExtensions": [
+    ".html"
+  ],
+  "jsonExtensions": [
+    ".json"
+  ],
+  "filePushOrder": [],
+  "skipSubdirectories": false
+}
\ No newline at end of file
diff --git a/gas-sample/Code.js b/gas-sample/Code.js
new file mode 100644
index 0000000..7b3abcf
--- /dev/null
+++ b/gas-sample/Code.js
@@ -0,0 +1,4 @@
+function helloWorld() {
+  const sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
+  sheet.getRange(1, 1).setValue("Hello from JavaScript!");
+}
\ No newline at end of file
diff --git a/gas-sample/appsscript.json b/gas-sample/appsscript.json
new file mode 100644
index 0000000..3cf1d24
--- /dev/null
+++ b/gas-sample/appsscript.json
@@ -0,0 +1,7 @@
+{
+  "timeZone": "America/New_York",
+  "dependencies": {
+  },
+  "exceptionLogging": "STACKDRIVER",
+  "runtimeVersion": "V8"
+}
\ No newline at end of file
diff --git a/readme/gcs.md b/readme/gcs.md
new file mode 100644
index 0000000..e69de29