From b5aedc8b7e661ae1715da5d3f63155220deb06b1 Mon Sep 17 00:00:00 2001
From: Ryu <114303361+ryuapp@users.noreply.github.com>
Date: Sat, 21 Feb 2026 14:28:22 +0900
Subject: [PATCH 1/2] fix: remove package manager fallback

---
 src/hooks/dependencies.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/hooks/dependencies.ts b/src/hooks/dependencies.ts
index 979587b..1eef001 100644
--- a/src/hooks/dependencies.ts
+++ b/src/hooks/dependencies.ts
@@ -84,7 +84,7 @@ const registerInstallationHook = (
 
     let packageManager: string
 
-    if (pmArg && installedPackageManagerNames.includes(pmArg)) {
+    if (pmArg) {
       packageManager = pmArg
     } else {
       packageManager = await select({
@@ -111,6 +111,10 @@ const registerInstallationHook = (
       try {
         await spawn(command, args, {
           cwd: directoryPath,
+          // On Windows, stderr from cmd.exe is encoded in the OEM code page (e.g. CP932),
+          // which causes garbled text when Node.js reads it as UTF-8.
+          // Using 'inherit' pipes stderr directly to the terminal to avoid this.
+          stderr: 'inherit',
         })
       } catch (error: unknown) {
         if (error instanceof SubprocessError) {

From 8ad9a050059929832eb29bf70bec754bd3a20f52 Mon Sep 17 00:00:00 2001
From: Ryu <114303361+ryuapp@users.noreply.github.com>
Date: Sat, 21 Feb 2026 15:24:07 +0900
Subject: [PATCH 2/2] fix: improve type safe for package manager names

---
 src/hooks/dependencies.ts | 22 ++++++++++++++--------
 src/index.ts              |  6 +++---
 2 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/src/hooks/dependencies.ts b/src/hooks/dependencies.ts
index 1eef001..02763ea 100644
--- a/src/hooks/dependencies.ts
+++ b/src/hooks/dependencies.ts
@@ -7,9 +7,16 @@ import type { EventEmitter } from 'node:events'
 import { exit } from 'node:process'
 import { projectDependenciesHook } from '../hook'
 
-type PackageManager = 'npm' | 'bun' | 'deno' | 'pnpm' | 'yarn'
-
-const knownPackageManagers: { [key: string]: string } = {
+export const knownPackageManagerNames = [
+  'npm',
+  'bun',
+  'deno',
+  'pnpm',
+  'yarn',
+] as const
+export type PackageManager = (typeof knownPackageManagerNames)[number]
+
+const knownPackageManagers: Record<PackageManager, string> = {
   npm: 'npm install',
   bun: 'bun install',
   deno: 'deno install',
@@ -17,7 +24,6 @@ const knownPackageManagers: { [key: string]: string } = {
   yarn: 'yarn',
 }
 
-export const knownPackageManagerNames = Object.keys(knownPackageManagers)
 const currentPackageManager = getCurrentPackageManager()
 
 // Deno and Netlify need no dependency installation step
@@ -25,14 +31,14 @@ const excludeTemplate = ['deno', 'netlify']
 
 export type EventMap = {
   dependencies: unknown[]
-  packageManager: unknown[]
+  packageManager: [PackageManager]
   completed: unknown[]
 }
 
 const registerInstallationHook = (
   template: string,
   installArg: boolean | undefined,
-  pmArg: string | undefined,
+  pmArg: PackageManager | undefined,
   emitter: EventEmitter<EventMap>,
 ) => {
   if (excludeTemplate.includes(template)) {
@@ -82,14 +88,14 @@ const registerInstallationHook = (
       return
     }
 
-    let packageManager: string
+    let packageManager: PackageManager
 
     if (pmArg) {
       packageManager = pmArg
     } else {
       packageManager = await select({
         message: 'Which package manager do you want to use?',
-        choices: installedPackageManagerNames.map((template: string) => ({
+        choices: installedPackageManagerNames.map((template) => ({
           title: template,
           value: template,
         })),
diff --git a/src/index.ts b/src/index.ts
index ce4aecc..28279e7 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -16,7 +16,7 @@ import {
   knownPackageManagerNames,
   registerInstallationHook,
 } from './hooks/dependencies'
-import type { EventMap } from './hooks/dependencies'
+import type { EventMap, PackageManager } from './hooks/dependencies'
 
 const [major, minor] = version.split('.')
 const ref = `v${major}.${minor}`
@@ -78,7 +78,7 @@ program
   .action(main)
 
 type ArgOptions = {
-  pm?: string
+  pm?: PackageManager
   offline: boolean
   install?: boolean
   template?: string
@@ -156,7 +156,7 @@ async function main(
   // Default package manager
   let packageManager = pm ?? 'npm'
   emitter.addListener('packageManager', (pm) => {
-    packageManager = String(pm)
+    packageManager = pm
   })
 
   registerInstallationHook(templateName, install, pm, emitter)