diff --git a/.gitignore b/.gitignore
index 54b52f6..c9fe027 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /target
 /tests
+/tmp
diff --git a/Makefile b/Makefile
index bd90def..819ecdb 100644
--- a/Makefile
+++ b/Makefile
@@ -13,3 +13,4 @@ fix:
 build:
 	cargo build
 	cp target/debug/skeleton bin/skeleton
+	cp target/debug/skeleton tmp/skeleton
diff --git a/bin/skeleton b/bin/skeleton
index 0c63dfb..d4babc7 100755
Binary files a/bin/skeleton and b/bin/skeleton differ
diff --git a/src/help.rs b/src/help.rs
index a2bdba2..267c8b9 100644
--- a/src/help.rs
+++ b/src/help.rs
@@ -21,12 +21,14 @@ pub fn help_command() {
     eprintln!();
     eprintln!("OPTIONS:");
     eprintln!("  rails  : Ruby on Rails");
+    eprintln!("  react  : React+Vite");
     eprintln!("  next   : Next.js");
     eprintln!("  rust   : Rust, Axum and SQLx");
     eprintln!("  python : Python, FastAPI and SQLAlchemy");
     eprintln!("  flutter: Flutter");
     eprintln!();
     eprintln!("ARGS:");
+    eprintln!("  new   : create new project.");
     eprintln!("  init  : initialize project.");
     eprintln!("  help  : help.");
 }
diff --git a/src/main.rs b/src/main.rs
index 9a97ad1..9dbfd72 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,6 +5,7 @@ mod help;
 mod nextjs;
 mod python;
 mod rails;
+mod react;
 mod rust;
 
 fn main() {
@@ -25,6 +26,7 @@ fn main() {
     let _current_path = env::current_dir().unwrap();
     let main_command = args[1].clone();
     let sub_command = args[2].clone();
+    let options_command = ext_cmd(&args);
 
     /*
     println!("current path is {}", current_path.display());
@@ -34,10 +36,18 @@ fn main() {
 
     match main_command.as_str() {
         "rails" => match sub_command.as_str() {
+            "new" => rails::new_rails(&options_command),
+            "api" => rails::api_rails(&options_command),
             "init" => rails::init_rails(),
             "help" => rails::help_rails(),
             _ => not_found(&sub_command),
         },
+        "react" => match sub_command.as_str() {
+            "new" => react::new_react(),
+            "init" => react::init_react(),
+            "help" => react::help_react(),
+            _ => not_found(&sub_command),
+        },
         "next" => match sub_command.as_str() {
             "init" => nextjs::init_next(),
             "help" => nextjs::help_next(),
@@ -67,3 +77,10 @@ fn not_found(text: &str) {
     println!("! {} is not found.", text);
     println!("! example: skeleton help");
 }
+
+fn ext_cmd(args: &[String]) -> String {
+    match args.get(3) {
+        Some(arg) => arg.to_string(),
+        None => "".to_string(),
+    }
+}
diff --git a/src/nextjs.rs b/src/nextjs.rs
index 8443748..261fda1 100644
--- a/src/nextjs.rs
+++ b/src/nextjs.rs
@@ -104,11 +104,7 @@ pub fn init_next() {
     // add .gitignore
     println!("+ append .gitignore");
     let path = Path::new(".gitignore");
-    let mut file = OpenOptions::new()
-        .write(true)
-        .append(true)
-        .open(path)
-        .unwrap();
+    let mut file = OpenOptions::new().append(true).open(path).unwrap();
 
     writeln!(file, ".env").unwrap();
 
diff --git a/src/rails.rs b/src/rails.rs
index cdd2a3b..6ceba2a 100644
--- a/src/rails.rs
+++ b/src/rails.rs
@@ -1,6 +1,7 @@
 use std::fs::OpenOptions;
-use std::io::Write;
+use std::io::{self, Write};
 use std::path::Path;
+use std::process::Command;
 
 pub fn init_rails() {
     println!("= init rails");
@@ -11,11 +12,7 @@ pub fn init_rails() {
         return println!("! Gemfile is not found.");
     }
 
-    let mut file = OpenOptions::new()
-        .write(true)
-        .append(true)
-        .open(path)
-        .unwrap();
+    let mut file = OpenOptions::new().append(true).open(path).unwrap();
 
     writeln!(
         file,
@@ -27,8 +24,51 @@ pub fn init_rails() {
     println!("= init rails finished.");
 }
 
+//
+// # 新しいRailsアプリの作成(WebApp)
+// $ rails new {project-app-name} -d postgresql -T -B -a propshaft -c tailwind
+pub fn new_rails(name: &str) {
+    println!("= rails new {}", name);
+
+    let mut bundle = Command::new("rails");
+    bundle
+        .arg("new")
+        .arg(name)
+        .args(["-d", "postgresql"])
+        .arg("-T")
+        .arg("-B")
+        .args(["-a", "propshaft"])
+        .args(["-c", "tailwind"]);
+    let output = bundle.output().expect("failed to execute rails command");
+
+    io::stdout().write_all(&output.stdout).unwrap();
+    println!("= rails new project created.");
+}
+
+//
+// # 新しいRailsアプリの作成(APIモード)
+// $ rails new {project-app-name} --api -d postgresql -T -B
+pub fn api_rails(name: &str) {
+    println!("= rails new {} --api", name);
+
+    let mut bundle = Command::new("rails");
+    bundle
+        .arg("new")
+        .arg(name)
+        .arg("--api")
+        .args(["-d", "postgresql"])
+        .arg("-T")
+        .arg("-B");
+    let output = bundle.output().expect("failed to execute rails command");
+
+    io::stdout().write_all(&output.stdout).unwrap();
+    println!("= rails api project created.");
+}
+
 pub fn help_rails() {
     println!("? help rails commands");
     println!("  rails init");
     println!("  rails help");
+    println!("  rails new project-name");
+    println!("  rails api project-name");
 }
diff --git a/src/react.rs b/src/react.rs
new file mode 100644
index 0000000..0cb0d7a
--- /dev/null
+++ b/src/react.rs
@@ -0,0 +1,12 @@
+pub fn new_react() {
+    println!("= new react");
+}
+
+pub fn init_react() {
+    println!("= init react");
+}
+
+pub fn help_react() {
+    println!("  react init");
+    println!("  react new");
+}