devy1540 · devy1540 · Aug 9, 2026 · Aug 9, 2026 · Aug 9, 2026
diff --git a/AGENTS.md b/AGENTS.md
@@ -1,7 +1,7 @@
 # Devy's Blog - Project Guide
 
 ## Overview
-React + TypeScript + Vite로 구축된 개인 기술 블로그. GitHub Pages 커스텀 도메인(`devy1540.dev`)에 배포.
+React + TypeScript + Vite로 구축된 개인 기술 블로그. GitHub Pages 커스텀 도메인(`dev.devy.dev`)에 배포.
 블로그 글은 Markdown 파일로 관리하며, 빌드 타임에 `import.meta.glob`으로 로드.
 
 ## Tech Stack
@@ -159,9 +159,9 @@ pnpm type-check # TypeScript 타입 체크
 ```
 
 ## Deployment
-- GitHub Pages: `devy1540.dev` (custom domain)
-- BASE_URL: `https://devy1540.dev`
-- Custom domain: `public/CNAME` = `devy1540.dev`
+- GitHub Pages: `dev.devy.dev` (custom domain)
+- BASE_URL: `https://dev.devy.dev`
+- Custom domain: `public/CNAME` = `dev.devy.dev`
 - 댓글: Giscus → `devy1540/devy1540.github.io` repo의 GitHub Discussions
 
 ## Code Conventions

diff --git a/CLAUDE.md b/CLAUDE.md
@@ -1,7 +1,7 @@
 # Devy's Blog - Project Guide
 
 ## Overview
-React + TypeScript + Vite로 구축된 개인 기술 블로그. GitHub Pages 커스텀 도메인(`devy1540.dev`)에 배포.
+React + TypeScript + Vite로 구축된 개인 기술 블로그. GitHub Pages 커스텀 도메인(`dev.devy.dev`)에 배포.
 블로그 글은 Markdown 파일로 관리하며, 빌드 타임에 `import.meta.glob`으로 로드.
 
 ## Tech Stack
@@ -159,9 +159,9 @@ pnpm type-check # TypeScript 타입 체크
 ```
 
 ## Deployment
-- GitHub Pages: `devy1540.dev` (custom domain)
-- BASE_URL: `https://devy1540.dev`
-- Custom domain: `public/CNAME` = `devy1540.dev`
+- GitHub Pages: `dev.devy.dev` (custom domain)
+- BASE_URL: `https://dev.devy.dev`
+- Custom domain: `public/CNAME` = `dev.devy.dev`
 - 댓글: Giscus → `devy1540/devy1540.github.io` repo의 GitHub Discussions
 
 ## Code Conventions

diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 <div align="center">
 
-<a href="https://devy1540.dev">
+<a href="https://dev.devy.dev">
   <img src="./public/og-image.png" alt="Devy Archive preview" width="720">
 </a>
 
@@ -13,15 +13,15 @@ React, TypeScript, Vite로 만든 개인 기술 블로그입니다.<br>
 
 <br>
 
-[![Deploy](https://img.shields.io/github/deployments/devy1540/devy1540.github.io/github-pages?label=github%20pages&logo=github&style=for-the-badge)](https://devy1540.dev)
+[![Deploy](https://img.shields.io/github/deployments/devy1540/devy1540.github.io/github-pages?label=github%20pages&logo=github&style=for-the-badge)](https://dev.devy.dev)
 [![React](https://img.shields.io/badge/React-19-61DAFB?logo=react&logoColor=white&style=for-the-badge)](https://react.dev)
 [![TypeScript](https://img.shields.io/badge/TypeScript-5.8-3178C6?logo=typescript&logoColor=white&style=for-the-badge)](https://www.typescriptlang.org)
 [![Vite](https://img.shields.io/badge/Vite-8-646CFF?logo=vite&logoColor=white&style=for-the-badge)](https://vite.dev)
 [![Tailwind CSS](https://img.shields.io/badge/Tailwind_CSS-4-06B6D4?logo=tailwindcss&logoColor=white&style=for-the-badge)](https://tailwindcss.com)
 
-[Live Site](https://devy1540.dev) &nbsp;&middot;&nbsp;
-[RSS](https://devy1540.dev/rss.xml) &nbsp;&middot;&nbsp;
-[Sitemap](https://devy1540.dev/sitemap.xml)
+[Live Site](https://dev.devy.dev) &nbsp;&middot;&nbsp;
+[RSS](https://dev.devy.dev/rss.xml) &nbsp;&middot;&nbsp;
+[Sitemap](https://dev.devy.dev/sitemap.xml)
 
 <br>
 
@@ -174,8 +174,8 @@ publishDate: "2025-12-01"   # optional, 예약 발행
 | Data Viz | Recharts |
 | Community | Giscus |
 | Analytics | Google Analytics, Google Apps Script API |
-| Deploy | GitHub Pages, custom domain `devy1540.dev` |
+| Deploy | GitHub Pages, custom domain `dev.devy.dev` |
 
 ## 배포
 
-GitHub Pages로 배포하며, 커스텀 도메인은 `public/CNAME`의 `devy1540.dev`를 사용합니다. 빌드 시 `rss.xml`, `sitemap.xml`, route별 prerendered HTML이 함께 생성됩니다.
+GitHub Pages로 배포하며, 커스텀 도메인은 `public/CNAME`의 `dev.devy.dev`를 사용합니다. 빌드 시 `rss.xml`, `sitemap.xml`, route별 prerendered HTML이 함께 생성됩니다.
diff --git a/content/posts/en/blog-dev-04-search-seo.md b/content/posts/en/blog-dev-04-search-seo.md
@@ -90,7 +90,7 @@ export function useMetaTags({ title, description, url, type = "website" }) {
 
     setMeta("description", description || "Notes from development work.")
     setMeta("og:title", title || "Devy's Blog")
-    setMeta("og:url", `https://devy1540.dev${url || "/"}`)
+    setMeta("og:url", `https://dev.devy.dev${url || "/"}`)
     // ...
   }, [title, description, url, type])
 }
@@ -130,7 +130,7 @@ The same Vite plugin generates `rss.xml` at build time. It parses each post's fr
 ```html
 <link rel="alternate" type="application/rss+xml"
   title="Devy's Blog RSS"
-  href="https://devy1540.dev/rss.xml" />
+  href="https://dev.devy.dev/rss.xml" />
 ```
 
 ---

diff --git a/content/posts/en/blog-dev-06-ux-seo.md b/content/posts/en/blog-dev-06-ux-seo.md
@@ -99,7 +99,7 @@ Add one file: `public/robots.txt`. Vite copies files under `public/` directly in
 ```text
 User-agent: *
 Allow: /
-Sitemap: https://devy1540.dev/sitemap.xml
+Sitemap: https://dev.devy.dev/sitemap.xml
 ```
 
 - `User-agent: *` - applies to all crawlers
@@ -110,9 +110,9 @@ Sitemap: https://devy1540.dev/sitemap.xml
 
 After preparing robots.txt and sitemap, register the site in [Google Search Console](https://search.google.com/search-console).
 
-1. Register `https://devy1540.dev` with either URL prefix or domain property.
+1. Register `https://dev.devy.dev` with either URL prefix or domain property.
 2. Complete ownership verification.
-3. Submit `https://devy1540.dev/sitemap.xml` from the Sitemaps menu.
+3. Submit `https://dev.devy.dev/sitemap.xml` from the Sitemaps menu.
 
 It can take days or weeks for Google to index the site, so it is normal if it does not appear in search results immediately.
 

diff --git a/content/posts/ko/blog-dev-04-search-seo.md b/content/posts/ko/blog-dev-04-search-seo.md
@@ -90,7 +90,7 @@ export function useMetaTags({ title, description, url, type = "website" }) {
 
     setMeta("description", description || "개발하며 배운 것들을 정리하고 공유합니다.")
     setMeta("og:title", title || "Devy's Blog")
-    setMeta("og:url", `https://devy1540.dev${url || "/"}`)
+    setMeta("og:url", `https://dev.devy.dev${url || "/"}`)
     // ...
   }, [title, description, url, type])
 }
@@ -130,7 +130,7 @@ function sitemapPlugin() {
 ```html
 <link rel="alternate" type="application/rss+xml"
   title="Devy's Blog RSS"
-  href="https://devy1540.dev/rss.xml" />
+  href="https://dev.devy.dev/rss.xml" />
 ```
 
 ---

diff --git a/content/posts/ko/blog-dev-06-ux-seo.md b/content/posts/ko/blog-dev-06-ux-seo.md
@@ -97,7 +97,7 @@ const { isMobile, setOpenMobile } = useSidebar()
 ```
 User-agent: *
 Allow: /
-Sitemap: https://devy1540.dev/sitemap.xml
+Sitemap: https://dev.devy.dev/sitemap.xml
 ```
 
 - `User-agent: *` - 모든 크롤러에 적용
@@ -108,9 +108,9 @@ Sitemap: https://devy1540.dev/sitemap.xml
 
 robots.txt와 sitemap을 준비한 후, [Google Search Console](https://search.google.com/search-console)에서 사이트를 등록합니다.
 
-1. **URL 접두어** 또는 **도메인 속성** 방식으로 `https://devy1540.dev` 등록
+1. **URL 접두어** 또는 **도메인 속성** 방식으로 `https://dev.devy.dev` 등록
 2. 소유권 인증 완료
-3. Sitemaps 메뉴에서 `https://devy1540.dev/sitemap.xml` 제출
+3. Sitemaps 메뉴에서 `https://dev.devy.dev/sitemap.xml` 제출
 
 Google이 색인하는 데 며칠~몇 주 걸릴 수 있으므로 바로 검색 결과에 나타나지 않아도 정상입니다.
 

diff --git a/docs/admin.md b/docs/admin.md
@@ -26,8 +26,8 @@ GitHub OAuth로 로그인한 관리자가 블로그 페이지 안에서 글의 *
 1. https://github.com/settings/developers → **New OAuth App**
 2. 입력:
    - **Application name**: `devy-blog-admin` (자유)
-   - **Homepage URL**: `https://devy1540.dev`
-   - **Authorization callback URL**: `https://devy1540.dev/admin/callback/`
+   - **Homepage URL**: `https://dev.devy.dev`
+   - **Authorization callback URL**: `https://dev.devy.dev/admin/callback/`
      - 로컬 테스트도 하려면 **Add another callback URL**로 `http://localhost:5173/admin/callback/` 추가
 3. 생성 후 **Client ID** 복사. **Generate a new client secret**으로 secret도 발급(한 번만 표시되니 보관).
 
@@ -40,7 +40,7 @@ GitHub OAuth로 로그인한 관리자가 블로그 페이지 안에서 글의 *
 이 저장소는 OAuth 토큰 교환 서버를 포함하지 않습니다. 별도로 운영하는 HTTPS API가
 `POST { "code": "..." }` 요청을 받아 GitHub OAuth App의 `client_secret`으로 토큰을 교환하고,
 성공 시 `{ "access_token": "..." }`을 반환해야 합니다. API에서는 허용 Origin을
-`https://devy1540.dev`로 제한하고 `client_secret`을 서버 측 시크릿으로 관리하세요.
+`https://dev.devy.dev`로 제한하고 `client_secret`을 서버 측 시크릿으로 관리하세요.
 
 ---
 
@@ -68,7 +68,7 @@ git commit && git push   # main 푸시 → GitHub Actions 배포
 
 ## 5. 사용
 
-1. `https://devy1540.dev/admin` 접속 → **GitHub로 로그인**
+1. `https://dev.devy.dev/admin` 접속 → **GitHub로 로그인**
 2. 인증되면 글 목록이 뜨고, 각 글의 **초안으로 / 발행하기** 버튼으로 토글
 3. 토글 시 frontmatter가 커밋되고, 재빌드 후 반영(목록 상단에 안내)
 4. 로그인하면 사이드바에도 **관리자** 메뉴가 나타남

diff --git a/index.html b/index.html
@@ -11,22 +11,22 @@
     <meta name="description" content="Devy의 개발과 운영 기록을 문제 해결 중심으로 모아둔 아카이브입니다." />
     <meta property="og:title" content="Devy Archive" />
     <meta property="og:description" content="Devy의 개발과 운영 기록을 문제 해결 중심으로 모아둔 아카이브입니다." />
-    <meta property="og:url" content="https://devy1540.dev" />
+    <meta property="og:url" content="https://dev.devy.dev" />
     <meta property="og:type" content="website" />
     <meta property="og:site_name" content="Devy Archive" />
-    <meta property="og:image" content="https://devy1540.dev/og-image.png?v=20260610" />
+    <meta property="og:image" content="https://dev.devy.dev/og-image.png?v=20260610" />
     <meta property="og:image:width" content="1200" />
     <meta property="og:image:height" content="630" />
     <meta property="og:image:alt" content="Devy Archive preview image" />
     <meta property="og:locale" content="ko_KR" />
-    <link rel="canonical" href="https://devy1540.dev" />
+    <link rel="canonical" href="https://dev.devy.dev" />
     <meta name="twitter:card" content="summary_large_image" />
     <meta name="twitter:title" content="Devy Archive" />
     <meta name="twitter:description" content="Devy의 개발과 운영 기록을 문제 해결 중심으로 모아둔 아카이브입니다." />
-    <meta name="twitter:image" content="https://devy1540.dev/og-image.png?v=20260610" />
+    <meta name="twitter:image" content="https://dev.devy.dev/og-image.png?v=20260610" />
     <meta name="twitter:image:alt" content="Devy Archive preview image" />
-    <link rel="alternate" type="application/rss+xml" title="Devy Archive RSS" href="https://devy1540.dev/rss.xml" />
-    <link rel="sitemap" type="application/xml" title="Sitemap" href="https://devy1540.dev/sitemap.xml" />
+    <link rel="alternate" type="application/rss+xml" title="Devy Archive RSS" href="https://dev.devy.dev/rss.xml" />
+    <link rel="sitemap" type="application/xml" title="Sitemap" href="https://dev.devy.dev/sitemap.xml" />
     <link rel="stylesheet" as="style" crossorigin href="https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.min.css" />
     <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-2383130502932429"
       crossorigin="anonymous"></script>

diff --git a/public/CNAME b/public/CNAME
@@ -1 +1 @@
-devy1540.dev
+dev.devy.dev