diff --git a/.prettierignore b/.prettierignore
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+++ b/.prettierignore
@@ -1 +1 @@
-contents
+/contents
diff --git a/contents/articles/2019/09-30_2019a-first-lecture/index.mdx b/contents/articles/2019/09-30_2019a-first-lecture/index.mdx
index 54c5e0fd..0f5da60e 100644
--- a/contents/articles/2019/09-30_2019a-first-lecture/index.mdx
+++ b/contents/articles/2019/09-30_2019a-first-lecture/index.mdx
@@ -4,7 +4,8 @@ date: 2019-09-30T23:10:44+09:00
 categories:
   - "info"
 author: tnagaya
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 A セメスターが始まり、本日で一週間となりました。教養学部の皆様は、そろそろ履修が確定している頃ではないでしょうか。
diff --git a/contents/articles/2019/09-30_2019a-schedule/index.mdx b/contents/articles/2019/09-30_2019a-schedule/index.mdx
index df6612cd..3e69ae0e 100644
--- a/contents/articles/2019/09-30_2019a-schedule/index.mdx
+++ b/contents/articles/2019/09-30_2019a-schedule/index.mdx
@@ -4,7 +4,8 @@ date: 2019-09-30T15:52:03+09:00
 categories:
   - "info"
 author: tnagaya
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 ## 開講日程
diff --git a/contents/articles/2019/09-30_syllabus-supports-2019a/index.mdx b/contents/articles/2019/09-30_syllabus-supports-2019a/index.md
similarity index 95%
rename from contents/articles/2019/09-30_syllabus-supports-2019a/index.mdx
rename to contents/articles/2019/09-30_syllabus-supports-2019a/index.md
index fab4b554..2e90f3b3 100644
--- a/contents/articles/2019/09-30_syllabus-supports-2019a/index.mdx
+++ b/contents/articles/2019/09-30_syllabus-supports-2019a/index.md
@@ -4,7 +4,8 @@ date: 2019-09-30T03:55:32+09:00
 categories:
   - "info"
 author: tnagaya
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 本年度 S セメスターでも大変多くの方にご好評をいただいた「[Syllabus by ut.code();](https://syllabus.utcode.net/)」が、A セメスターの授業に対応しました。
diff --git a/contents/articles/2019/10-01_windows-home-to-education/index.mdx b/contents/articles/2019/10-01_windows-home-to-education/index.md
similarity index 98%
rename from contents/articles/2019/10-01_windows-home-to-education/index.mdx
rename to contents/articles/2019/10-01_windows-home-to-education/index.md
index 3889f570..ffb89b94 100644
--- a/contents/articles/2019/10-01_windows-home-to-education/index.mdx
+++ b/contents/articles/2019/10-01_windows-home-to-education/index.md
@@ -4,7 +4,8 @@ date: 2019-10-01T14:26:13+09:00
 categories:
   - "utokyo"
 author: tnagaya
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 皆さんが購入された Windows マシンに搭載されている OS は、最近であれば Windows 10 Home であることが多いかと思いますが、この Home エディションでは、開発に必須の Hyper-V（仮想化支援機能）が有効化できなくなっています。幸いなことに、東京大学は学生に向け、Windows 10 の最上位エディションと同等の機能が利用できる Education ライセンスを無償で提供しています。この記事では、そちらの利用方法を解説します。
diff --git a/contents/articles/2019/10-03_2019a-first-lecture-record/index.mdx b/contents/articles/2019/10-03_2019a-first-lecture-record/index.md
similarity index 99%
rename from contents/articles/2019/10-03_2019a-first-lecture-record/index.mdx
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index eeb68b3d..23605909 100644
--- a/contents/articles/2019/10-03_2019a-first-lecture-record/index.mdx
+++ b/contents/articles/2019/10-03_2019a-first-lecture-record/index.md
@@ -4,7 +4,8 @@ date: 2019-10-04T03:36:06+09:00
 categories:
   - "events"
 author: tnagaya
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 2019/10/2（水）、2019/10/5（土）に実施された[第一回「エンジニアになろう」講習会](https://utcode.net/2019/info/2019a-first-lecture/)の講義スライドを書き起こした資料です。説明の簡略化のため、一部不正確な書き方をしている部分がありますが、ご了承ください。東京大学の学生が A セメスターで学習することを想定しています。
diff --git a/contents/articles/2019/10-03_2019a-first-lecture-report/index.mdx b/contents/articles/2019/10-03_2019a-first-lecture-report/index.md
similarity index 95%
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index 8d689d7c..db910882 100644
--- a/contents/articles/2019/10-03_2019a-first-lecture-report/index.mdx
+++ b/contents/articles/2019/10-03_2019a-first-lecture-report/index.md
@@ -3,7 +3,8 @@ title: "「エンジニアになろう」講習会初回講義を実施しまし
 date: 2019-10-03T12:01:25+09:00
 categories:
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: tnagaya
 ---
 
diff --git a/contents/articles/2019/10-03_2019a-first-lecture-report/image.webp b/contents/articles/2019/10-03_2019a-first-lecture-report/thumbnail.webp
similarity index 100%
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diff --git a/contents/articles/2019/10-05_2019a-first-saturday-lecture/index.mdx b/contents/articles/2019/10-05_2019a-first-saturday-lecture/index.md
similarity index 91%
rename from contents/articles/2019/10-05_2019a-first-saturday-lecture/index.mdx
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index 25f6b686..e9655b09 100644
--- a/contents/articles/2019/10-05_2019a-first-saturday-lecture/index.mdx
+++ b/contents/articles/2019/10-05_2019a-first-saturday-lecture/index.md
@@ -3,7 +3,8 @@ title: "第一回「エンジニアになろう」講習会土曜日の部を実
 date: 2019-10-06T08:59:05+09:00
 categories:
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: tnagaya
 ---
 
diff --git a/contents/articles/2019/10-05_2019a-first-saturday-lecture/image.webp b/contents/articles/2019/10-05_2019a-first-saturday-lecture/thumbnail.webp
similarity index 100%
rename from contents/articles/2019/10-05_2019a-first-saturday-lecture/image.webp
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diff --git a/contents/articles/2019/10-14_lecture-34-announcement/index.mdx b/contents/articles/2019/10-14_lecture-34-announcement/index.mdx
index 4e9f39af..773089a5 100644
--- a/contents/articles/2019/10-14_lecture-34-announcement/index.mdx
+++ b/contents/articles/2019/10-14_lecture-34-announcement/index.mdx
@@ -4,7 +4,8 @@ date: 2019-10-15T02:38:24+09:00
 categories:
   - "info"
 author: tnagaya
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 「エンジニアになろう」講習会第三回・第四回を、以下の日程・場所で開講いたします。
diff --git a/contents/articles/2019/11-03_utcode-lectures-01/index.mdx b/contents/articles/2019/11-03_utcode-lectures-01/index.md
similarity index 99%
rename from contents/articles/2019/11-03_utcode-lectures-01/index.mdx
rename to contents/articles/2019/11-03_utcode-lectures-01/index.md
index 76c4a969..034f0491 100644
--- a/contents/articles/2019/11-03_utcode-lectures-01/index.mdx
+++ b/contents/articles/2019/11-03_utcode-lectures-01/index.md
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #1"
 date: 2019-11-03T09:29:17+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 ようこそ！ut.code();へ。
diff --git a/contents/articles/2019/11-03_utcode-lectures-02/index.mdx b/contents/articles/2019/11-03_utcode-lectures-02/index.mdx
index 50364e7d..c10b8c1e 100644
--- a/contents/articles/2019/11-03_utcode-lectures-02/index.mdx
+++ b/contents/articles/2019/11-03_utcode-lectures-02/index.mdx
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #2"
 date: 2019-11-03T09:30:33+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 ## 黒いアイツ
diff --git a/contents/articles/2019/11-03_utcode-lectures-03/index.mdx b/contents/articles/2019/11-03_utcode-lectures-03/index.mdx
index 5d214f07..cc545db2 100644
--- a/contents/articles/2019/11-03_utcode-lectures-03/index.mdx
+++ b/contents/articles/2019/11-03_utcode-lectures-03/index.mdx
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #3"
 date: 2019-11-03T09:30:56+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 今回からお待ちかねプログラミングの時間です！まずはターミナルで
diff --git a/contents/articles/2019/11-03_utcode-lectures-04/index.mdx b/contents/articles/2019/11-03_utcode-lectures-04/index.mdx
index 9adea629..f109d598 100644
--- a/contents/articles/2019/11-03_utcode-lectures-04/index.mdx
+++ b/contents/articles/2019/11-03_utcode-lectures-04/index.mdx
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #4"
 date: 2019-11-03T09:31:18+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 今回はデザインです。ある意味 Web 開発の一番楽しいところですね。ある程度までは非常にスムーズに進められるのですが、こだわり始めると途端に面倒になってきます。
diff --git a/contents/articles/2019/11-03_utcode-lectures-05/index.mdx b/contents/articles/2019/11-03_utcode-lectures-05/index.mdx
index 5eadc7d0..c093fb6a 100644
--- a/contents/articles/2019/11-03_utcode-lectures-05/index.mdx
+++ b/contents/articles/2019/11-03_utcode-lectures-05/index.mdx
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #5"
 date: 2019-11-03T09:31:53+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 ## 環境構築
diff --git a/contents/articles/2019/11-03_utcode-lectures-06/index.mdx b/contents/articles/2019/11-03_utcode-lectures-06/index.md
similarity index 99%
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index eef3facb..58d81154 100644
--- a/contents/articles/2019/11-03_utcode-lectures-06/index.mdx
+++ b/contents/articles/2019/11-03_utcode-lectures-06/index.md
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #6"
 date: 2019-11-03T09:32:28+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 ## JavaScript から始めるオブジェクト指向
diff --git a/contents/articles/2019/11-03_utcode-lectures-07/index.mdx b/contents/articles/2019/11-03_utcode-lectures-07/index.md
similarity index 99%
rename from contents/articles/2019/11-03_utcode-lectures-07/index.mdx
rename to contents/articles/2019/11-03_utcode-lectures-07/index.md
index b0b7faa5..363ef726 100644
--- a/contents/articles/2019/11-03_utcode-lectures-07/index.mdx
+++ b/contents/articles/2019/11-03_utcode-lectures-07/index.md
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #7"
 date: 2019-11-03T11:50:11+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 前回の記事はだいぶ抽象的な内容が多く辛かったかと思いますが、今回からはまた具体的な内容に入っていきます。
diff --git a/contents/articles/2019/11-03_utcode-lectures-08/index.mdx b/contents/articles/2019/11-03_utcode-lectures-08/index.mdx
index a188423d..11aca6aa 100644
--- a/contents/articles/2019/11-03_utcode-lectures-08/index.mdx
+++ b/contents/articles/2019/11-03_utcode-lectures-08/index.mdx
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #8"
 date: 2019-11-03T13:45:01+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 久しぶりに楽しい回です。次回からまた辛い部分になってくるので、気合を入れて頑張りましょう！
diff --git a/contents/articles/2019/11-07_utcode-lectures-09/index.mdx b/contents/articles/2019/11-07_utcode-lectures-09/index.mdx
index 22426e93..da6b7e16 100644
--- a/contents/articles/2019/11-07_utcode-lectures-09/index.mdx
+++ b/contents/articles/2019/11-07_utcode-lectures-09/index.mdx
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #9"
 date: 2019-11-07T16:26:46+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 ## 環境構築
diff --git a/contents/articles/2019/11-10_utcode-lectures-10/index.mdx b/contents/articles/2019/11-10_utcode-lectures-10/index.mdx
index cc97deb0..926e4dc7 100644
--- a/contents/articles/2019/11-10_utcode-lectures-10/index.mdx
+++ b/contents/articles/2019/11-10_utcode-lectures-10/index.mdx
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #10"
 date: 2019-11-10T17:34:28+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 ## クライアントがデータを送信する仕組み
diff --git a/contents/articles/2019/11-16_utcode-lectures-11/index.mdx b/contents/articles/2019/11-16_utcode-lectures-11/index.mdx
index 6ec7470b..fee7ee9d 100644
--- a/contents/articles/2019/11-16_utcode-lectures-11/index.mdx
+++ b/contents/articles/2019/11-16_utcode-lectures-11/index.mdx
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #11"
 date: 2019-11-16T16:22:36+09:00
 categories:
   - "internal"
-image: ./ajax.webp
+thumbnail:
+  src: ./ajax.webp
 ---
 
 今回は重ための内容から入ります。眠くなる時間帯に読まないようにしましょう。
diff --git a/contents/articles/2019/12-15_komaba-fes-70/index.mdx b/contents/articles/2019/12-15_komaba-fes-70/index.md
similarity index 99%
rename from contents/articles/2019/12-15_komaba-fes-70/index.mdx
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index cd045790..0787e49e 100644
--- a/contents/articles/2019/12-15_komaba-fes-70/index.mdx
+++ b/contents/articles/2019/12-15_komaba-fes-70/index.md
@@ -3,7 +3,8 @@ title: "第70回駒場祭で「はじめてのWebプログラミング教室」
 date: 2019-12-15T14:34:09+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 第 70 回駒場祭は、2019/11/22〜11/24 の３日間で開催されました。本年度の駒場祭は、初日が平日であったことに加え、雨天予報が出ていたため、来場者数の減少が危惧されていましたが、私たち ut.code();の企画「はじめての Web プログラミング教室」では、多くの方にお越しいただきました。本当にありがとうございました。
diff --git a/contents/articles/2019/12-15_komaba-fes-70/image.webp b/contents/articles/2019/12-15_komaba-fes-70/thumbnail.webp
similarity index 100%
rename from contents/articles/2019/12-15_komaba-fes-70/image.webp
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diff --git a/contents/articles/2019/12-22_utcode-lectures-12/index.mdx b/contents/articles/2019/12-22_utcode-lectures-12/index.mdx
index 39971f7e..f9587cfc 100644
--- a/contents/articles/2019/12-22_utcode-lectures-12/index.mdx
+++ b/contents/articles/2019/12-22_utcode-lectures-12/index.mdx
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #12"
 date: 2019-12-22T09:04:30+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 辛い回が続きます・・・もう少しの辛抱です！
diff --git a/contents/articles/2019/12-23_utcode-lectures-13/index.mdx b/contents/articles/2019/12-23_utcode-lectures-13/index.mdx
index 583aead4..f8ffeaba 100644
--- a/contents/articles/2019/12-23_utcode-lectures-13/index.mdx
+++ b/contents/articles/2019/12-23_utcode-lectures-13/index.mdx
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #13"
 date: 2019-12-23T17:25:06+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 今回はフロントエンドに戻ります。ここからは比較的新しい開発手法を取り入れていきます。
diff --git a/contents/articles/2020/02-15_utcode-lectures-14/index.mdx b/contents/articles/2020/02-15_utcode-lectures-14/index.md
similarity index 99%
rename from contents/articles/2020/02-15_utcode-lectures-14/index.mdx
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index 269a7f28..8928ef8a 100644
--- a/contents/articles/2020/02-15_utcode-lectures-14/index.mdx
+++ b/contents/articles/2020/02-15_utcode-lectures-14/index.md
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #14"
 date: 2020-02-16T00:58:01+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 前回、JavaScript が ECMAScript（ES と略されることが多いです）をベースとしていることを学習しました。ECMAScript は、バージョンが 5 から 6 に上がると同時に、大幅な機能追加が行われました。現代の JavaScript は巨大化・複雑化の一途を辿っていますが、この理由の一端は、ES6 以降に実装された文法機能が劇的に開発効率を上げたことにもあります。この回では、昨今の JavaScript では必須の考え方である不変性（イミュータビリティ）の考え方について学びます。
diff --git a/contents/articles/2020/02-16_utcode-lectures-15/index.mdx b/contents/articles/2020/02-16_utcode-lectures-15/index.mdx
index bde68357..ece9bb78 100644
--- a/contents/articles/2020/02-16_utcode-lectures-15/index.mdx
+++ b/contents/articles/2020/02-16_utcode-lectures-15/index.mdx
@@ -3,7 +3,8 @@ title: "ut.code(); 学習カリキュラム #15"
 date: 2020-02-16T15:46:31+09:00
 categories:
   - "internal"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 今回は、昨今のフロントエンド開発の人気ライブラリ React を用いて開発する手法を学びます。
diff --git a/contents/articles/2020/07-29_activity-resumption/index.mdx b/contents/articles/2020/07-29_activity-resumption/index.md
similarity index 96%
rename from contents/articles/2020/07-29_activity-resumption/index.mdx
rename to contents/articles/2020/07-29_activity-resumption/index.md
index 30f97bc6..e77aa826 100644
--- a/contents/articles/2020/07-29_activity-resumption/index.mdx
+++ b/contents/articles/2020/07-29_activity-resumption/index.md
@@ -3,7 +3,8 @@ title: "夏季休業期間中の活動のお知らせ"
 date: 2020-07-29T12:21:19+09:00
 categories:
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code();では、新型コロナウイルスの感染拡大の影響を受け、活動を自粛しておりましたが、7 月 15 日付で東京大学から発表された「[学生の皆さんへ　理事・副学長メッセージ](https://www.u-tokyo.ac.jp/ja/general/COVID-19-message-20200715.html)」を受け、夏休みの活動を再開することといたしました。活動は感染予防に十分配慮したうえで実施しますが、当面の間オンライン通話も併用する予定です。
diff --git a/contents/articles/2020/07-29_activity-resumption/image.webp b/contents/articles/2020/07-29_activity-resumption/thumbnail.webp
similarity index 100%
rename from contents/articles/2020/07-29_activity-resumption/image.webp
rename to contents/articles/2020/07-29_activity-resumption/thumbnail.webp
diff --git a/contents/articles/2020/08-04_summer-activities/index.mdx b/contents/articles/2020/08-04_summer-activities/index.mdx
index 5f35d43c..a5229b54 100644
--- a/contents/articles/2020/08-04_summer-activities/index.mdx
+++ b/contents/articles/2020/08-04_summer-activities/index.mdx
@@ -3,7 +3,8 @@ title: "夏季休業期間中の活動日程"
 date: 2020-08-04T17:27:14+09:00
 categories:
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 夏季休業期間中は、以下の日程で活動します。
diff --git a/contents/articles/2020/08-04_summer-activities/image.webp b/contents/articles/2020/08-04_summer-activities/thumbnail.webp
similarity index 100%
rename from contents/articles/2020/08-04_summer-activities/image.webp
rename to contents/articles/2020/08-04_summer-activities/thumbnail.webp
diff --git a/contents/articles/2020/09-21_may-fes-93/index.mdx b/contents/articles/2020/09-21_may-fes-93/index.md
similarity index 95%
rename from contents/articles/2020/09-21_may-fes-93/index.mdx
rename to contents/articles/2020/09-21_may-fes-93/index.md
index 7b6bcc65..720545ca 100644
--- a/contents/articles/2020/09-21_may-fes-93/index.mdx
+++ b/contents/articles/2020/09-21_may-fes-93/index.md
@@ -3,7 +3,8 @@ title: "第93回五月祭に参加しました"
 date: 2020-09-21T11:55:55+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 [第 93 回五月祭](https://gogatsusai.jp/93/visitor/)は、新型コロナウイルスの影響により当初の予定どおりの開催ができなくなってしまったため、9 月 20 日〜9 月 21 日にかけて、オンラインでの開催となりました。ut.code();では、農学部キャンパスから Zoom にて配信を行いました。
diff --git a/contents/articles/2020/09-21_may-fes-93/image.webp b/contents/articles/2020/09-21_may-fes-93/thumbnail.webp
similarity index 100%
rename from contents/articles/2020/09-21_may-fes-93/image.webp
rename to contents/articles/2020/09-21_may-fes-93/thumbnail.webp
diff --git a/contents/articles/2020/11-25_komaba-fes-71/index.mdx b/contents/articles/2020/11-25_komaba-fes-71/index.md
similarity index 94%
rename from contents/articles/2020/11-25_komaba-fes-71/index.mdx
rename to contents/articles/2020/11-25_komaba-fes-71/index.md
index fa961d23..66a3e39f 100644
--- a/contents/articles/2020/11-25_komaba-fes-71/index.mdx
+++ b/contents/articles/2020/11-25_komaba-fes-71/index.md
@@ -3,7 +3,8 @@ title: "第71回駒場祭に参加しました"
 date: 2020-11-25T23:41:02+09:00
 categories:
   - "utokyo"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 本年度の駒場祭は、五月祭と同様オンラインでの開催となりました。ut.code();では、[Blockly](https://github.com/google/blockly)を用いたプログラミング教室を Zoom 上で開催しました。例年よりも小規模なものになってしまったものの、熱心に取り組んでくださった皆様に支えられ、本年度も最後まで走りきることができました。お忙しい中ご参加いただいた方、本当にありがとうございました！
diff --git a/contents/articles/2020/11-25_komaba-fes-71/image.webp b/contents/articles/2020/11-25_komaba-fes-71/thumbnail.webp
similarity index 100%
rename from contents/articles/2020/11-25_komaba-fes-71/image.webp
rename to contents/articles/2020/11-25_komaba-fes-71/thumbnail.webp
diff --git a/contents/articles/2021/03-14_utmap-times/index.mdx b/contents/articles/2021/03-14_utmap-times/index.md
similarity index 97%
rename from contents/articles/2021/03-14_utmap-times/index.mdx
rename to contents/articles/2021/03-14_utmap-times/index.md
index 1347fa8b..1cb03889 100644
--- a/contents/articles/2021/03-14_utmap-times/index.mdx
+++ b/contents/articles/2021/03-14_utmap-times/index.md
@@ -3,7 +3,8 @@ title: "UTmap Timesを制作しています"
 date: 2021-03-14T14:04:25+09:00
 categories:
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 現在、ut.code();では、[UTmap Times](https://utmap.jp/)の制作に取り組んでいます。
diff --git a/contents/articles/2021/03-14_utmap-times/image.webp b/contents/articles/2021/03-14_utmap-times/thumbnail.webp
similarity index 100%
rename from contents/articles/2021/03-14_utmap-times/image.webp
rename to contents/articles/2021/03-14_utmap-times/thumbnail.webp
diff --git a/contents/articles/2021/04-16_welcome-events/index.mdx b/contents/articles/2021/04-16_welcome-events/index.md
similarity index 97%
rename from contents/articles/2021/04-16_welcome-events/index.mdx
rename to contents/articles/2021/04-16_welcome-events/index.md
index 74543787..28a107a3 100644
--- a/contents/articles/2021/04-16_welcome-events/index.mdx
+++ b/contents/articles/2021/04-16_welcome-events/index.md
@@ -3,7 +3,8 @@ title: "2021年度新歓日程"
 date: 2021-04-16T09:12:03+09:00
 categories:
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code();では、本年度の新歓活動を以下の通り実施いたします。
diff --git a/contents/articles/2021/04-16_welcome-events/image.webp b/contents/articles/2021/04-16_welcome-events/thumbnail.webp
similarity index 100%
rename from contents/articles/2021/04-16_welcome-events/image.webp
rename to contents/articles/2021/04-16_welcome-events/thumbnail.webp
diff --git a/contents/articles/2021/05-07_may-fes-94-postponed/index.mdx b/contents/articles/2021/05-07_may-fes-94-postponed/index.md
similarity index 96%
rename from contents/articles/2021/05-07_may-fes-94-postponed/index.mdx
rename to contents/articles/2021/05-07_may-fes-94-postponed/index.md
index d9458771..23cc9630 100644
--- a/contents/articles/2021/05-07_may-fes-94-postponed/index.mdx
+++ b/contents/articles/2021/05-07_may-fes-94-postponed/index.md
@@ -3,7 +3,8 @@ title: "第94回五月祭は5月開催を断念しました"
 date: 2021-05-07T23:04:19+09:00
 categories:
   - "utokyo"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 第 94 回五月祭は、大学側からの要請により、当初の日程での開催の断念を余儀なくされました。
diff --git a/contents/articles/2021/05-07_may-fes-94-postponed/image.webp b/contents/articles/2021/05-07_may-fes-94-postponed/thumbnail.webp
similarity index 100%
rename from contents/articles/2021/05-07_may-fes-94-postponed/image.webp
rename to contents/articles/2021/05-07_may-fes-94-postponed/thumbnail.webp
diff --git a/contents/articles/2021/05-24_weekly-learning-activities-2021/index.mdx b/contents/articles/2021/05-24_weekly-learning-activities-2021/index.mdx
index d93ccf1c..d9f80d67 100644
--- a/contents/articles/2021/05-24_weekly-learning-activities-2021/index.mdx
+++ b/contents/articles/2021/05-24_weekly-learning-activities-2021/index.mdx
@@ -3,7 +3,8 @@ title: "【中止】新歓イベント「コードで、未来を描け」"
 date: 2021-05-24T11:04:41+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ## イベント中止のお知らせ
diff --git a/contents/articles/2021/05-24_weekly-learning-activities-2021/image.webp b/contents/articles/2021/05-24_weekly-learning-activities-2021/thumbnail.webp
similarity index 100%
rename from contents/articles/2021/05-24_weekly-learning-activities-2021/image.webp
rename to contents/articles/2021/05-24_weekly-learning-activities-2021/thumbnail.webp
diff --git a/contents/articles/2021/07-26_summer-coding-camp/index.mdx b/contents/articles/2021/07-26_summer-coding-camp/index.md
similarity index 97%
rename from contents/articles/2021/07-26_summer-coding-camp/index.mdx
rename to contents/articles/2021/07-26_summer-coding-camp/index.md
index 172d38cd..a47ee399 100644
--- a/contents/articles/2021/07-26_summer-coding-camp/index.mdx
+++ b/contents/articles/2021/07-26_summer-coding-camp/index.md
@@ -3,7 +3,8 @@ title: "ut.code(); Summer Coding Campのお知らせ"
 date: 2021-07-26T23:49:36+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code(); では、夏休み期間を利用してイベント「ut.code(); Summer Coding Camp」を実施いたします。
diff --git a/contents/articles/2021/07-26_summer-coding-camp/image.webp b/contents/articles/2021/07-26_summer-coding-camp/thumbnail.webp
similarity index 100%
rename from contents/articles/2021/07-26_summer-coding-camp/image.webp
rename to contents/articles/2021/07-26_summer-coding-camp/thumbnail.webp
diff --git a/contents/articles/2021/08-09_summer-coding-camp-1-report/index.mdx b/contents/articles/2021/08-09_summer-coding-camp-1-report/index.mdx
index ed8f2bc8..8f58079b 100644
--- a/contents/articles/2021/08-09_summer-coding-camp-1-report/index.mdx
+++ b/contents/articles/2021/08-09_summer-coding-camp-1-report/index.mdx
@@ -3,7 +3,8 @@ title: "Summer Coding Camp 第1回を開催しました"
 date: 2021-08-09T10:25:11+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 8/6 13:00 〜 8/6 17:00 に、[KOMAD](https://komad.tokyo/)にて[Summer Coding Camp](/2021/events/2021-summer-coding-camp/)を開催しました。
diff --git a/contents/articles/2021/08-09_summer-coding-camp-1-report/image.webp b/contents/articles/2021/08-09_summer-coding-camp-1-report/thumbnail.webp
similarity index 100%
rename from contents/articles/2021/08-09_summer-coding-camp-1-report/image.webp
rename to contents/articles/2021/08-09_summer-coding-camp-1-report/thumbnail.webp
diff --git a/contents/articles/2021/09-23_may-fes-94/index.mdx b/contents/articles/2021/09-23_may-fes-94/index.md
similarity index 92%
rename from contents/articles/2021/09-23_may-fes-94/index.mdx
rename to contents/articles/2021/09-23_may-fes-94/index.md
index c6d5d49e..13e172cc 100644
--- a/contents/articles/2021/09-23_may-fes-94/index.mdx
+++ b/contents/articles/2021/09-23_may-fes-94/index.md
@@ -3,7 +3,8 @@ title: "第94回五月祭に出展しました"
 date: 2021-09-23T10:58:05+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code();は、第 94 回五月祭に「はじめてのプログラミング教室」を出展しました。
diff --git a/contents/articles/2021/09-23_may-fes-94/image.webp b/contents/articles/2021/09-23_may-fes-94/thumbnail.webp
similarity index 100%
rename from contents/articles/2021/09-23_may-fes-94/image.webp
rename to contents/articles/2021/09-23_may-fes-94/thumbnail.webp
diff --git a/contents/articles/2021/09-24_tuk-programming-workshop/index.mdx b/contents/articles/2021/09-24_tuk-programming-workshop/index.md
similarity index 95%
rename from contents/articles/2021/09-24_tuk-programming-workshop/index.mdx
rename to contents/articles/2021/09-24_tuk-programming-workshop/index.md
index 84a3adb3..525178c8 100644
--- a/contents/articles/2021/09-24_tuk-programming-workshop/index.mdx
+++ b/contents/articles/2021/09-24_tuk-programming-workshop/index.md
@@ -3,7 +3,8 @@ title: "丁友会 × ut.code(); 合同プログラミング教室開催のお知
 date: 2021-09-25T08:49:44+09:00
 categories:
   - "events"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 ut.code();は、丁友会と合同で、プログラミング教室を開催します。 丁友会は、工学部・工学系研究科の学生の親睦を目的とした団体ですが、このイベントは東京大学・東京大学大学院に所属する学生の方であればどなたでも参加できます。
diff --git a/contents/articles/2021/10-20_tuk-programming-workshop-report/index.mdx b/contents/articles/2021/10-20_tuk-programming-workshop-report/index.md
similarity index 97%
rename from contents/articles/2021/10-20_tuk-programming-workshop-report/index.mdx
rename to contents/articles/2021/10-20_tuk-programming-workshop-report/index.md
index feed95ab..d1318ec4 100644
--- a/contents/articles/2021/10-20_tuk-programming-workshop-report/index.mdx
+++ b/contents/articles/2021/10-20_tuk-programming-workshop-report/index.md
@@ -3,7 +3,8 @@ title: "丁友会と合同でプログラミング教室を開催しました"
 date: 2021-10-20T22:38:55+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code(); は、2021 年 10 月 16 日 (土)に、[東京大学工学部丁友会](https://tuk.t.u-tokyo.ac.jp/)と合同でプログラミング教室を開催しました。東京大学の学部生・大学院生を対象に、HTML と若干の CSS、JavaScript の基礎を学んでいただいた上で、シンプルなウェブアプリケーションをつくってもらうことを目標に設定しました。
diff --git a/contents/articles/2021/10-20_tuk-programming-workshop-report/image.webp b/contents/articles/2021/10-20_tuk-programming-workshop-report/thumbnail.webp
similarity index 100%
rename from contents/articles/2021/10-20_tuk-programming-workshop-report/image.webp
rename to contents/articles/2021/10-20_tuk-programming-workshop-report/thumbnail.webp
diff --git a/contents/articles/2021/11-20_kf-utnp-202111/index.mdx b/contents/articles/2021/11-20_kf-utnp-202111/index.md
similarity index 90%
rename from contents/articles/2021/11-20_kf-utnp-202111/index.mdx
rename to contents/articles/2021/11-20_kf-utnp-202111/index.md
index c853bb3e..13d34368 100644
--- a/contents/articles/2021/11-20_kf-utnp-202111/index.mdx
+++ b/contents/articles/2021/11-20_kf-utnp-202111/index.md
@@ -3,7 +3,8 @@ title: "東京大学新聞 2021年11月号に掲載されました"
 date: 2021-11-20T09:45:13+09:00
 categories:
   - "events"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 ut.code();の第 92 回駒場祭企画「[はじめてのプログラミング教室](https://www.komabasai.net/72/visitor/kikaku/373)」が、2021 年 11 月発行の東京大学新聞 (第 2969 号)に掲載されました。
diff --git a/contents/articles/2021/11-23_komaba-fes-72/index.mdx b/contents/articles/2021/11-23_komaba-fes-72/index.md
similarity index 92%
rename from contents/articles/2021/11-23_komaba-fes-72/index.mdx
rename to contents/articles/2021/11-23_komaba-fes-72/index.md
index 8920e218..b818edcc 100644
--- a/contents/articles/2021/11-23_komaba-fes-72/index.mdx
+++ b/contents/articles/2021/11-23_komaba-fes-72/index.md
@@ -3,7 +3,8 @@ title: "第72回駒場祭に参加しました"
 date: 2021-11-23T19:16:32+09:00
 categories:
   - "events"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 第 72 回駒場祭は、オンラインでの開催となりました。
diff --git a/contents/articles/2022/02-14_recruitment-for-welcoming-events/index.mdx b/contents/articles/2022/02-14_recruitment-for-welcoming-events/index.md
similarity index 97%
rename from contents/articles/2022/02-14_recruitment-for-welcoming-events/index.mdx
rename to contents/articles/2022/02-14_recruitment-for-welcoming-events/index.md
index f2628b7c..6370b693 100644
--- a/contents/articles/2022/02-14_recruitment-for-welcoming-events/index.mdx
+++ b/contents/articles/2022/02-14_recruitment-for-welcoming-events/index.md
@@ -3,7 +3,8 @@ title: "2022年度の新歓活動にご協力いただける方を募集して
 date: 2022-02-14T23:20:40+09:00
 categories:
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 2019 年の ut.code(); の発足から、3 年の月日が経とうとしています。コロナ禍もついに終息の兆しが見え、来年度からは対面での新歓活動の再開が見込まれています。ut.code(); の掲げる「東京大学のソフトウェアエンジニアリングコミュニティとして、学生に学びと発信の機会を提供する」という理念の実現のため、この機会を逃すわけにはまいりません。
diff --git a/contents/articles/2022/02-14_recruitment-for-welcoming-events/image.webp b/contents/articles/2022/02-14_recruitment-for-welcoming-events/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/02-14_recruitment-for-welcoming-events/image.webp
rename to contents/articles/2022/02-14_recruitment-for-welcoming-events/thumbnail.webp
diff --git a/contents/articles/2022/03-20_welcome-events/index.mdx b/contents/articles/2022/03-20_welcome-events/index.md
similarity index 98%
rename from contents/articles/2022/03-20_welcome-events/index.mdx
rename to contents/articles/2022/03-20_welcome-events/index.md
index 06beb208..df660c4e 100644
--- a/contents/articles/2022/03-20_welcome-events/index.mdx
+++ b/contents/articles/2022/03-20_welcome-events/index.md
@@ -3,7 +3,8 @@ title: "2022年度新歓日程"
 date: 2022-03-20T21:34:39+09:00
 categories:
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code();では、2022 年度の新歓活動を以下の通り実施いたします。
diff --git a/contents/articles/2022/03-20_welcome-events/image.webp b/contents/articles/2022/03-20_welcome-events/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/03-20_welcome-events/image.webp
rename to contents/articles/2022/03-20_welcome-events/thumbnail.webp
diff --git a/contents/articles/2022/04-03_club-orientation/index.mdx b/contents/articles/2022/04-03_club-orientation/index.md
similarity index 96%
rename from contents/articles/2022/04-03_club-orientation/index.mdx
rename to contents/articles/2022/04-03_club-orientation/index.md
index 9d721d75..5fa9ee20 100644
--- a/contents/articles/2022/04-03_club-orientation/index.mdx
+++ b/contents/articles/2022/04-03_club-orientation/index.md
@@ -3,7 +3,8 @@ title: "2022年度サークルオリエンテーションに参加していま
 date: 2022-04-03T13:24:29+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code(); は、4 月 3 日から 4 月 4 日にかけて行われるサークルオリエンテーションに参加しています。会場（1313 教室）では Web 技術を使った簡単なゲームをお楽しみいただけます。
diff --git a/contents/articles/2022/04-03_club-orientation/image.webp b/contents/articles/2022/04-03_club-orientation/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/04-03_club-orientation/image.webp
rename to contents/articles/2022/04-03_club-orientation/thumbnail.webp
diff --git a/contents/articles/2022/04-19_gw-event/index.mdx b/contents/articles/2022/04-19_gw-event/index.md
similarity index 98%
rename from contents/articles/2022/04-19_gw-event/index.mdx
rename to contents/articles/2022/04-19_gw-event/index.md
index 9e433ae6..ca488064 100644
--- a/contents/articles/2022/04-19_gw-event/index.mdx
+++ b/contents/articles/2022/04-19_gw-event/index.md
@@ -3,7 +3,8 @@ title: "ゴールデンウィークイベントについてのお知らせ"
 date: 2022-04-19T19:40:10+09:00
 categories:
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code();ではゴールデンウィークに新歓活動の一環として GW イベントを実施いたします。
diff --git a/contents/articles/2022/04-19_gw-event/image.webp b/contents/articles/2022/04-19_gw-event/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/04-19_gw-event/image.webp
rename to contents/articles/2022/04-19_gw-event/thumbnail.webp
diff --git a/contents/articles/2022/04-19_welcome-events-report/index.mdx b/contents/articles/2022/04-19_welcome-events-report/index.md
similarity index 96%
rename from contents/articles/2022/04-19_welcome-events-report/index.mdx
rename to contents/articles/2022/04-19_welcome-events-report/index.md
index 5fa075d6..56fb4db9 100644
--- a/contents/articles/2022/04-19_welcome-events-report/index.mdx
+++ b/contents/articles/2022/04-19_welcome-events-report/index.md
@@ -3,7 +3,8 @@ title: "2022年度新歓体験会を実施しました"
 date: 2022-04-19T22:57:00+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 4/10(日), 4/17(日), 4/23 (土)に、[渋谷 IVY イーストビル](https://www.accea.co.jp/cr/tokyo/shibuya/shibuya01.php)にて 2022 年度新歓体験会を実施しました。
diff --git a/contents/articles/2022/04-19_welcome-events-report/image.webp b/contents/articles/2022/04-19_welcome-events-report/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/04-19_welcome-events-report/image.webp
rename to contents/articles/2022/04-19_welcome-events-report/thumbnail.webp
diff --git a/contents/articles/2022/04-25_may-fes-95-announce/index.mdx b/contents/articles/2022/04-25_may-fes-95-announce/index.md
similarity index 96%
rename from contents/articles/2022/04-25_may-fes-95-announce/index.mdx
rename to contents/articles/2022/04-25_may-fes-95-announce/index.md
index c8c22645..981f7e6e 100644
--- a/contents/articles/2022/04-25_may-fes-95-announce/index.mdx
+++ b/contents/articles/2022/04-25_may-fes-95-announce/index.md
@@ -4,7 +4,8 @@ date: 2022-04-25T18:32:12+09:00
 categories:
   - "events"
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code();は、第 95 回五月祭に「[はじめてのプログラミング教室](http://gogatsusai.jp/95/visitor/campus/kikaku/325)」を出展いたします。
diff --git a/contents/articles/2022/04-25_may-fes-95-announce/image.webp b/contents/articles/2022/04-25_may-fes-95-announce/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/04-25_may-fes-95-announce/image.webp
rename to contents/articles/2022/04-25_may-fes-95-announce/thumbnail.webp
diff --git a/contents/articles/2022/05-08_gw-event-report/index.mdx b/contents/articles/2022/05-08_gw-event-report/index.md
similarity index 96%
rename from contents/articles/2022/05-08_gw-event-report/index.mdx
rename to contents/articles/2022/05-08_gw-event-report/index.md
index ed768f0c..88f8c01d 100644
--- a/contents/articles/2022/05-08_gw-event-report/index.mdx
+++ b/contents/articles/2022/05-08_gw-event-report/index.md
@@ -3,7 +3,8 @@ title: "2022年度GWイベントを実施しました"
 date: 2022-05-08T19:34:47+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code();は 5/4(水), 5/5(木)の 2 日間、 [検見川総合運動場・セミナーハウス](https://www.u-tokyo.ac.jp/ja/students/facility/h08_03.html)にて新歓活動の一環として GW イベントを実施しました。
diff --git a/contents/articles/2022/05-08_gw-event-report/image.webp b/contents/articles/2022/05-08_gw-event-report/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/05-08_gw-event-report/image.webp
rename to contents/articles/2022/05-08_gw-event-report/thumbnail.webp
diff --git a/contents/articles/2022/05-09_mf-utnp-202205/index.mdx b/contents/articles/2022/05-09_mf-utnp-202205/index.md
similarity index 92%
rename from contents/articles/2022/05-09_mf-utnp-202205/index.mdx
rename to contents/articles/2022/05-09_mf-utnp-202205/index.md
index 00a12517..bab31fc0 100644
--- a/contents/articles/2022/05-09_mf-utnp-202205/index.mdx
+++ b/contents/articles/2022/05-09_mf-utnp-202205/index.md
@@ -3,7 +3,8 @@ title: "東大新聞オンラインに掲載されました"
 date: 2022-05-09T21:32:19+09:00
 categories:
   - "events"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 ut.code();の第 95 回五月祭企画「[はじめてのプログラミング教室](https://gogatsusai.jp/95/visitor/campus/kikaku/325)」が東大新聞オンラインの【第 95 回五月祭おすすめ企画 7 選】として掲載されました。
diff --git a/contents/articles/2022/05-18_may-fes-95-report/index.mdx b/contents/articles/2022/05-18_may-fes-95-report/index.md
similarity index 96%
rename from contents/articles/2022/05-18_may-fes-95-report/index.mdx
rename to contents/articles/2022/05-18_may-fes-95-report/index.md
index 9e24a7a0..838f3f7a 100644
--- a/contents/articles/2022/05-18_may-fes-95-report/index.mdx
+++ b/contents/articles/2022/05-18_may-fes-95-report/index.md
@@ -3,7 +3,8 @@ title: "第95回五月祭に出展しました"
 date: 2022-05-18T19:05:54+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code();は、第 95 回五月祭に「はじめてのプログラミング教室」を出展しました。
diff --git a/contents/articles/2022/05-18_may-fes-95-report/image.webp b/contents/articles/2022/05-18_may-fes-95-report/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/05-18_may-fes-95-report/image.webp
rename to contents/articles/2022/05-18_may-fes-95-report/thumbnail.webp
diff --git a/contents/articles/2022/06-13_hackathon-202206/index.mdx b/contents/articles/2022/06-13_hackathon-202206/index.md
similarity index 98%
rename from contents/articles/2022/06-13_hackathon-202206/index.mdx
rename to contents/articles/2022/06-13_hackathon-202206/index.md
index 445a1f00..47cba223 100644
--- a/contents/articles/2022/06-13_hackathon-202206/index.mdx
+++ b/contents/articles/2022/06-13_hackathon-202206/index.md
@@ -3,7 +3,8 @@ title: "2022年度春新歓ハッカソンイベントを開催しました"
 date: 2022-06-13T15:22:35+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code(); では、6 月 13 日〜14 日に、ハッカソンイベントを開催しました。春新歓イベントの総まとめとして、20 名の参加者が 5 チームに分かれてそれぞれプロダクト開発を行いました。完成したプロジェクトは GitHub で公開しています。
diff --git a/contents/articles/2022/06-13_hackathon-202206/image.webp b/contents/articles/2022/06-13_hackathon-202206/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/06-13_hackathon-202206/image.webp
rename to contents/articles/2022/06-13_hackathon-202206/thumbnail.webp
diff --git a/contents/articles/2022/07-02_ut-medium/index.mdx b/contents/articles/2022/07-02_ut-medium/index.md
similarity index 94%
rename from contents/articles/2022/07-02_ut-medium/index.mdx
rename to contents/articles/2022/07-02_ut-medium/index.md
index 49900ab3..82ad3720 100644
--- a/contents/articles/2022/07-02_ut-medium/index.mdx
+++ b/contents/articles/2022/07-02_ut-medium/index.md
@@ -3,7 +3,8 @@ title: "新メディア開発プロジェクトが発足しました"
 date: 2022-07-02T17:57:10+09:00
 categories:
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 大学生が自由にニュースを報道できるプラットフォームである、「ut medium」をスタートさせました。
diff --git a/contents/articles/2022/07-02_ut-medium/image.webp b/contents/articles/2022/07-02_ut-medium/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/07-02_ut-medium/image.webp
rename to contents/articles/2022/07-02_ut-medium/thumbnail.webp
diff --git a/contents/articles/2022/07-15_summer-events/index.mdx b/contents/articles/2022/07-15_summer-events/index.md
similarity index 98%
rename from contents/articles/2022/07-15_summer-events/index.mdx
rename to contents/articles/2022/07-15_summer-events/index.md
index 8e4f29bc..01bf56a7 100644
--- a/contents/articles/2022/07-15_summer-events/index.mdx
+++ b/contents/articles/2022/07-15_summer-events/index.md
@@ -3,7 +3,8 @@ title: "2022年度夏の学習イベントのお知らせ"
 date: 2022-07-15T10:25:34+09:00
 categories:
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: tnagaya
 ---
 
diff --git a/contents/articles/2022/07-15_summer-events/image.webp b/contents/articles/2022/07-15_summer-events/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/07-15_summer-events/image.webp
rename to contents/articles/2022/07-15_summer-events/thumbnail.webp
diff --git a/contents/articles/2022/08-07_summer-events-report/index.mdx b/contents/articles/2022/08-07_summer-events-report/index.md
similarity index 95%
rename from contents/articles/2022/08-07_summer-events-report/index.mdx
rename to contents/articles/2022/08-07_summer-events-report/index.md
index 35e5d9ab..7af4c19c 100644
--- a/contents/articles/2022/08-07_summer-events-report/index.mdx
+++ b/contents/articles/2022/08-07_summer-events-report/index.md
@@ -3,7 +3,8 @@ title: 2022年度夏の学習体験会を実施しました
 date: 2022-08-07T16:05:36+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: snakamura
 ---
 
diff --git a/contents/articles/2022/08-07_summer-events-report/image.webp b/contents/articles/2022/08-07_summer-events-report/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/08-07_summer-events-report/image.webp
rename to contents/articles/2022/08-07_summer-events-report/thumbnail.webp
diff --git a/contents/articles/2022/10-04_tuk-workshop/index.mdx b/contents/articles/2022/10-04_tuk-workshop/index.md
similarity index 97%
rename from contents/articles/2022/10-04_tuk-workshop/index.mdx
rename to contents/articles/2022/10-04_tuk-workshop/index.md
index 268cb30a..d9fcea73 100644
--- a/contents/articles/2022/10-04_tuk-workshop/index.mdx
+++ b/contents/articles/2022/10-04_tuk-workshop/index.md
@@ -3,7 +3,8 @@ title: 【丁友会 × ut.code();】プログラミング講習会のお知ら
 date: 2022-10-04T15:00:00+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code(); は工学部丁友会と合同で、東京大学の学部生および大学院生を対象にプログラミング講習会を以下の通り実施いたします。
diff --git a/contents/articles/2022/10-04_tuk-workshop/image.webp b/contents/articles/2022/10-04_tuk-workshop/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/10-04_tuk-workshop/image.webp
rename to contents/articles/2022/10-04_tuk-workshop/thumbnail.webp
diff --git a/contents/articles/2022/10-17_tuk-workshop-report/index.mdx b/contents/articles/2022/10-17_tuk-workshop-report/index.md
similarity index 96%
rename from contents/articles/2022/10-17_tuk-workshop-report/index.mdx
rename to contents/articles/2022/10-17_tuk-workshop-report/index.md
index 4e26b9fc..0bda199f 100644
--- a/contents/articles/2022/10-17_tuk-workshop-report/index.mdx
+++ b/contents/articles/2022/10-17_tuk-workshop-report/index.md
@@ -3,7 +3,8 @@ title: 丁友会プログラミング教室を開催しました
 date: 2022-10-17T15:10:23+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ![会場の様子1](./image1.webp)
diff --git a/contents/articles/2022/10-17_tuk-workshop-report/image.webp b/contents/articles/2022/10-17_tuk-workshop-report/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/10-17_tuk-workshop-report/image.webp
rename to contents/articles/2022/10-17_tuk-workshop-report/thumbnail.webp
diff --git a/contents/articles/2022/11-18_komaba-fes-73/index.mdx b/contents/articles/2022/11-18_komaba-fes-73/index.md
similarity index 93%
rename from contents/articles/2022/11-18_komaba-fes-73/index.mdx
rename to contents/articles/2022/11-18_komaba-fes-73/index.md
index 03ee1017..8cc80ce9 100644
--- a/contents/articles/2022/11-18_komaba-fes-73/index.mdx
+++ b/contents/articles/2022/11-18_komaba-fes-73/index.md
@@ -3,7 +3,8 @@ title: 第73回駒場祭に参加しています
 date: 2022-11-18T21:54:48+09:00
 categories:
   - "events"
-image: +/images/no-image.svg
+thumbnail:
+  src: +/images/no-image.svg
 ---
 
 ut.code(); は 11 月 18 日（金）〜21 日（日）、3 年ぶりに駒場キャンパスに帰ってきた駒場祭に参加しています。
diff --git a/contents/articles/2022/11-23_komaba-grand-prix/index.mdx b/contents/articles/2022/11-23_komaba-grand-prix/index.md
similarity index 97%
rename from contents/articles/2022/11-23_komaba-grand-prix/index.mdx
rename to contents/articles/2022/11-23_komaba-grand-prix/index.md
index af15c32a..3803fe87 100644
--- a/contents/articles/2022/11-23_komaba-grand-prix/index.mdx
+++ b/contents/articles/2022/11-23_komaba-grand-prix/index.md
@@ -3,7 +3,8 @@ title: 駒場グランプリを受賞しました
 date: 2022-11-23T17:09:29+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code(); では、2022年11月18日（金）〜20日（日）に行われた駒場祭において、「あなたのためのプログラミング」という企画名で参加しました。
diff --git a/contents/articles/2022/11-23_komaba-grand-prix/image.webp b/contents/articles/2022/11-23_komaba-grand-prix/thumbnail.webp
similarity index 100%
rename from contents/articles/2022/11-23_komaba-grand-prix/image.webp
rename to contents/articles/2022/11-23_komaba-grand-prix/thumbnail.webp
diff --git a/contents/articles/2023/04-02_2022-winter-report/index.mdx b/contents/articles/2023/04-02_2022-winter-report/index.md
similarity index 99%
rename from contents/articles/2023/04-02_2022-winter-report/index.mdx
rename to contents/articles/2023/04-02_2022-winter-report/index.md
index 3a89a914..a13d1244 100644
--- a/contents/articles/2023/04-02_2022-winter-report/index.mdx
+++ b/contents/articles/2023/04-02_2022-winter-report/index.md
@@ -3,7 +3,8 @@ title: 2022 年度冬の活動報告
 date: 2023-04-02T22:00:00+09:00
 categories:
   - info
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 2022 年度もあっという間に過ぎ去り、いよいよ 2023 年度の新入生を迎えようとしています。
diff --git a/contents/articles/2023/04-02_2022-winter-report/image.webp b/contents/articles/2023/04-02_2022-winter-report/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/04-02_2022-winter-report/image.webp
rename to contents/articles/2023/04-02_2022-winter-report/thumbnail.webp
diff --git a/contents/articles/2023/04-03_seminar-detail/index.mdx b/contents/articles/2023/04-03_seminar-detail/index.md
similarity index 96%
rename from contents/articles/2023/04-03_seminar-detail/index.mdx
rename to contents/articles/2023/04-03_seminar-detail/index.md
index 9c2ccf1a..545a7140 100644
--- a/contents/articles/2023/04-03_seminar-detail/index.mdx
+++ b/contents/articles/2023/04-03_seminar-detail/index.md
@@ -3,7 +3,8 @@ title: 2023年度Sセメスター自主ゼミのお知らせ
 date: 2023-04-03T22:00:00+09:00
 categories:
   - info
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 桜が美しく咲き乱れる今日この頃、大学もいよいよ春学期の始まりが近づいています。ut.code();では今学期から新たにプログラミングや Web 技術を学び始める人のために、自主ゼミを開催することになりました！
diff --git a/contents/articles/2023/04-03_seminar-detail/image.webp b/contents/articles/2023/04-03_seminar-detail/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/04-03_seminar-detail/image.webp
rename to contents/articles/2023/04-03_seminar-detail/thumbnail.webp
diff --git a/contents/articles/2023/04-11_-workshop-spring-detail/index.mdx b/contents/articles/2023/04-11_-workshop-spring-detail/index.md
similarity index 96%
rename from contents/articles/2023/04-11_-workshop-spring-detail/index.mdx
rename to contents/articles/2023/04-11_-workshop-spring-detail/index.md
index 34340c24..1a4ba449 100644
--- a/contents/articles/2023/04-11_-workshop-spring-detail/index.mdx
+++ b/contents/articles/2023/04-11_-workshop-spring-detail/index.md
@@ -3,7 +3,8 @@ title: 2023年春の講習会開催のお知らせ
 date: 2023-04-12T15:01:30+09:00
 categories:
   - info
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code(); では、ゼミ「モダン Web 開発入門」に曜限の都合などで参加できない方向けに、講習会を開催いたします！
diff --git a/contents/articles/2023/04-11_-workshop-spring-detail/image.webp b/contents/articles/2023/04-11_-workshop-spring-detail/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/04-11_-workshop-spring-detail/image.webp
rename to contents/articles/2023/04-11_-workshop-spring-detail/thumbnail.webp
diff --git a/contents/articles/2023/04-21_may-fes-96-announce/index.mdx b/contents/articles/2023/04-21_may-fes-96-announce/index.md
similarity index 97%
rename from contents/articles/2023/04-21_may-fes-96-announce/index.mdx
rename to contents/articles/2023/04-21_may-fes-96-announce/index.md
index e3affc31..a8a547c2 100644
--- a/contents/articles/2023/04-21_may-fes-96-announce/index.mdx
+++ b/contents/articles/2023/04-21_may-fes-96-announce/index.md
@@ -4,7 +4,8 @@ date: 2023-04-21T12:00:00+09:00
 categories:
   - "events"
   - "info"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: snakamura
 ---
 
diff --git a/contents/articles/2023/04-21_may-fes-96-announce/image.webp b/contents/articles/2023/04-21_may-fes-96-announce/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/04-21_may-fes-96-announce/image.webp
rename to contents/articles/2023/04-21_may-fes-96-announce/thumbnail.webp
diff --git a/contents/articles/2023/05-16_may-fes-96-report/index.mdx b/contents/articles/2023/05-16_may-fes-96-report/index.md
similarity index 97%
rename from contents/articles/2023/05-16_may-fes-96-report/index.mdx
rename to contents/articles/2023/05-16_may-fes-96-report/index.md
index 09c1502a..afcefd72 100644
--- a/contents/articles/2023/05-16_may-fes-96-report/index.mdx
+++ b/contents/articles/2023/05-16_may-fes-96-report/index.md
@@ -3,7 +3,8 @@ title: "第96回五月祭に出展しました"
 date: 2023-05-16T12:00:00+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: snakamura
 ---
 
diff --git a/contents/articles/2023/05-16_may-fes-96-report/image.webp b/contents/articles/2023/05-16_may-fes-96-report/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/05-16_may-fes-96-report/image.webp
rename to contents/articles/2023/05-16_may-fes-96-report/thumbnail.webp
diff --git a/contents/articles/2023/05-17_geekhaku-report/index.mdx b/contents/articles/2023/05-17_geekhaku-report/index.md
similarity index 96%
rename from contents/articles/2023/05-17_geekhaku-report/index.mdx
rename to contents/articles/2023/05-17_geekhaku-report/index.md
index a03fad04..db2ef818 100644
--- a/contents/articles/2023/05-17_geekhaku-report/index.mdx
+++ b/contents/articles/2023/05-17_geekhaku-report/index.md
@@ -3,7 +3,8 @@ title: "技育博2023に参加しました"
 date: 2023-05-19T12:00:00+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code();は、[技育博2023](https://talent.supporterz.jp/geekhaku/2023/)に参加しました。
diff --git a/contents/articles/2023/05-17_geekhaku-report/image.webp b/contents/articles/2023/05-17_geekhaku-report/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/05-17_geekhaku-report/image.webp
rename to contents/articles/2023/05-17_geekhaku-report/thumbnail.webp
diff --git a/contents/articles/2023/07-01_gmo-internet-group-seminar/index.mdx b/contents/articles/2023/07-01_gmo-internet-group-seminar/index.md
similarity index 97%
rename from contents/articles/2023/07-01_gmo-internet-group-seminar/index.mdx
rename to contents/articles/2023/07-01_gmo-internet-group-seminar/index.md
index e2ed887d..0c13fbc1 100644
--- a/contents/articles/2023/07-01_gmo-internet-group-seminar/index.mdx
+++ b/contents/articles/2023/07-01_gmo-internet-group-seminar/index.md
@@ -3,7 +3,8 @@ title: "GMO Internet Groupの成瀬允宣さんによるAWSワークショップ
 date: 2023-07-01T12:00:00+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 7 月 1 日 (土) に、GMO Internet Groupの成瀬さんがut.code();に向けてAWSの勉強会を開催してくださいました。
diff --git a/contents/articles/2023/07-01_gmo-internet-group-seminar/image.webp b/contents/articles/2023/07-01_gmo-internet-group-seminar/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/07-01_gmo-internet-group-seminar/image.webp
rename to contents/articles/2023/07-01_gmo-internet-group-seminar/thumbnail.webp
diff --git a/contents/articles/2023/08-06_-hackathon-invitation/index.mdx b/contents/articles/2023/08-06_-hackathon-invitation/index.md
similarity index 96%
rename from contents/articles/2023/08-06_-hackathon-invitation/index.mdx
rename to contents/articles/2023/08-06_-hackathon-invitation/index.md
index 28021c8a..81e487e1 100644
--- a/contents/articles/2023/08-06_-hackathon-invitation/index.mdx
+++ b/contents/articles/2023/08-06_-hackathon-invitation/index.md
@@ -3,7 +3,8 @@ title: "夏のハッカソン開催のお知らせ"
 date: 2023-08-06T12:00:00+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code(); はこの夏、ハッカソンを開催いたします！
diff --git a/contents/articles/2023/08-06_-hackathon-invitation/image.webp b/contents/articles/2023/08-06_-hackathon-invitation/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/08-06_-hackathon-invitation/image.webp
rename to contents/articles/2023/08-06_-hackathon-invitation/thumbnail.webp
diff --git a/contents/articles/2023/08-14_announce-design-workshop/index.mdx b/contents/articles/2023/08-14_announce-design-workshop/index.md
similarity index 97%
rename from contents/articles/2023/08-14_announce-design-workshop/index.mdx
rename to contents/articles/2023/08-14_announce-design-workshop/index.md
index 2ed55608..b33bc7e2 100644
--- a/contents/articles/2023/08-14_announce-design-workshop/index.mdx
+++ b/contents/articles/2023/08-14_announce-design-workshop/index.md
@@ -3,7 +3,8 @@ title: "夏のデザイン講習会"
 date: 2023-08-14T12:00:00+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 Webアプリをつくる上で、見た目(UI)を良くする努力は不可欠です。
diff --git a/contents/articles/2023/08-14_announce-design-workshop/image.webp b/contents/articles/2023/08-14_announce-design-workshop/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/08-14_announce-design-workshop/image.webp
rename to contents/articles/2023/08-14_announce-design-workshop/thumbnail.webp
diff --git a/contents/articles/2023/08-20_junior-programming-festival/index.mdx b/contents/articles/2023/08-20_junior-programming-festival/index.md
similarity index 96%
rename from contents/articles/2023/08-20_junior-programming-festival/index.mdx
rename to contents/articles/2023/08-20_junior-programming-festival/index.md
index 3aa8b072..13942b91 100644
--- a/contents/articles/2023/08-20_junior-programming-festival/index.mdx
+++ b/contents/articles/2023/08-20_junior-programming-festival/index.md
@@ -3,7 +3,8 @@ title: コエテコジュニアプログラミングフェス2023に出展しま
 date: 2023-08-20T22:00:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code();は 8 月 20 日に[コエテコジュニアプログラミングフェス 2023](https://expo.coeteco.jp/junior-programming-fes-2023)に出展しました。
diff --git a/contents/articles/2023/08-20_junior-programming-festival/image.webp b/contents/articles/2023/08-20_junior-programming-festival/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/08-20_junior-programming-festival/image.webp
rename to contents/articles/2023/08-20_junior-programming-festival/thumbnail.webp
diff --git a/contents/articles/2023/08-27_-hackathon-review/index.mdx b/contents/articles/2023/08-27_-hackathon-review/index.md
similarity index 98%
rename from contents/articles/2023/08-27_-hackathon-review/index.mdx
rename to contents/articles/2023/08-27_-hackathon-review/index.md
index fa028023..8720f55f 100644
--- a/contents/articles/2023/08-27_-hackathon-review/index.mdx
+++ b/contents/articles/2023/08-27_-hackathon-review/index.md
@@ -3,7 +3,8 @@ title: "夏のハッカソンを開催しました！"
 date: 2023-08-27T12:00:00+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 ut.code(); では、8 月 17 日〜19 日に、ハッカソンイベントを開催しました。16 名の参加者が 4 チームに分かれてそれぞれプロダクト開発を行いました。完成したプロジェクトのソースコードは GitHub で公開しています。
diff --git a/contents/articles/2023/08-27_-hackathon-review/image.webp b/contents/articles/2023/08-27_-hackathon-review/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/08-27_-hackathon-review/image.webp
rename to contents/articles/2023/08-27_-hackathon-review/thumbnail.webp
diff --git a/contents/articles/2023/08-29_design-workshop/index.mdx b/contents/articles/2023/08-29_design-workshop/index.md
similarity index 95%
rename from contents/articles/2023/08-29_design-workshop/index.mdx
rename to contents/articles/2023/08-29_design-workshop/index.md
index 0122d9a6..743dc496 100644
--- a/contents/articles/2023/08-29_design-workshop/index.mdx
+++ b/contents/articles/2023/08-29_design-workshop/index.md
@@ -3,7 +3,8 @@ title: "夏のデザイン講習会を開催しました！"
 date: 2023-09-26T23:25:00+09:00
 categories:
   - "events"
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 「デザインをそれっぽく見せる方法」というタイトルで、WebアプリのUIデザインを学ぶ講習会を開催しました！
diff --git a/contents/articles/2023/08-29_design-workshop/image.webp b/contents/articles/2023/08-29_design-workshop/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/08-29_design-workshop/image.webp
rename to contents/articles/2023/08-29_design-workshop/thumbnail.webp
diff --git a/contents/articles/2023/09-18_a-seminar/index.mdx b/contents/articles/2023/09-18_a-seminar/index.mdx
index 18b06ef5..f971a895 100644
--- a/contents/articles/2023/09-18_a-seminar/index.mdx
+++ b/contents/articles/2023/09-18_a-seminar/index.mdx
@@ -3,7 +3,8 @@ title: "2023年度Aセメスター全学自由研究ゼミナール開講のお
 date: 2023-09-17T23:25:00+09:00
 categories:
   - info
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 import ActionButton from "+/components/ActionButton.astro";
diff --git a/contents/articles/2023/09-18_a-seminar/image.webp b/contents/articles/2023/09-18_a-seminar/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/09-18_a-seminar/image.webp
rename to contents/articles/2023/09-18_a-seminar/thumbnail.webp
diff --git a/contents/articles/2023/09-26_summer-camp/index.mdx b/contents/articles/2023/09-26_summer-camp/index.md
similarity index 95%
rename from contents/articles/2023/09-26_summer-camp/index.mdx
rename to contents/articles/2023/09-26_summer-camp/index.md
index 26be07f7..a08e60a2 100644
--- a/contents/articles/2023/09-26_summer-camp/index.mdx
+++ b/contents/articles/2023/09-26_summer-camp/index.md
@@ -3,7 +3,8 @@ title: "2023年度夏合宿を開催しました"
 date: 2023-09-27T14:00:00+09:00
 categories:
   - event
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 9/25 ~ 9/27 に 夏合宿を開催しました！
diff --git a/contents/articles/2023/09-26_summer-camp/image.webp b/contents/articles/2023/09-26_summer-camp/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/09-26_summer-camp/image.webp
rename to contents/articles/2023/09-26_summer-camp/thumbnail.webp
diff --git a/contents/articles/2023/11-17_progate-workshop-11-17/index.mdx b/contents/articles/2023/11-17_progate-workshop-11-17/index.md
similarity index 97%
rename from contents/articles/2023/11-17_progate-workshop-11-17/index.mdx
rename to contents/articles/2023/11-17_progate-workshop-11-17/index.md
index ebc231f3..23755f85 100644
--- a/contents/articles/2023/11-17_progate-workshop-11-17/index.mdx
+++ b/contents/articles/2023/11-17_progate-workshop-11-17/index.md
@@ -3,7 +3,8 @@ title: 株式会社 Progate とハンズオン勉強会を開催しました！
 date: 2023-11-17T22:00:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/11-17_progate-workshop-11-17/image.webp b/contents/articles/2023/11-17_progate-workshop-11-17/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/11-17_progate-workshop-11-17/image.webp
rename to contents/articles/2023/11-17_progate-workshop-11-17/thumbnail.webp
diff --git a/contents/articles/2023/11-20_coeteco-hack-1-announcement/index.mdx b/contents/articles/2023/11-20_coeteco-hack-1-announcement/index.md
similarity index 95%
rename from contents/articles/2023/11-20_coeteco-hack-1-announcement/index.mdx
rename to contents/articles/2023/11-20_coeteco-hack-1-announcement/index.md
index 639b7748..dbad60fe 100644
--- a/contents/articles/2023/11-20_coeteco-hack-1-announcement/index.mdx
+++ b/contents/articles/2023/11-20_coeteco-hack-1-announcement/index.md
@@ -3,7 +3,8 @@ title: GMO メディア株式会社とハッカソンを開催します！
 date: 2023-11-20T22:00:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/11-20_coeteco-hack-1-announcement/image.webp b/contents/articles/2023/11-20_coeteco-hack-1-announcement/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/11-20_coeteco-hack-1-announcement/image.webp
rename to contents/articles/2023/11-20_coeteco-hack-1-announcement/thumbnail.webp
diff --git a/contents/articles/2023/11-23_komaba-festival-74/index.mdx b/contents/articles/2023/11-23_komaba-festival-74/index.md
similarity index 98%
rename from contents/articles/2023/11-23_komaba-festival-74/index.mdx
rename to contents/articles/2023/11-23_komaba-festival-74/index.md
index 65502f6a..a2ab6956 100644
--- a/contents/articles/2023/11-23_komaba-festival-74/index.mdx
+++ b/contents/articles/2023/11-23_komaba-festival-74/index.md
@@ -3,7 +3,8 @@ title: 第 74 回駒場祭に参加します
 date: 2023-11-23T19:00:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/11-23_komaba-festival-74/image.webp b/contents/articles/2023/11-23_komaba-festival-74/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/11-23_komaba-festival-74/image.webp
rename to contents/articles/2023/11-23_komaba-festival-74/thumbnail.webp
diff --git a/contents/articles/2023/11-24_komaba-festival-day1/index.mdx b/contents/articles/2023/11-24_komaba-festival-day1/index.md
similarity index 96%
rename from contents/articles/2023/11-24_komaba-festival-day1/index.mdx
rename to contents/articles/2023/11-24_komaba-festival-day1/index.md
index 047bc154..9019918f 100644
--- a/contents/articles/2023/11-24_komaba-festival-day1/index.mdx
+++ b/contents/articles/2023/11-24_komaba-festival-day1/index.md
@@ -3,7 +3,8 @@ title: 第 74 回駒場祭の 1 日目に参加しました。
 date: 2023-11-24T18:00:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/11-24_komaba-festival-day1/image.webp b/contents/articles/2023/11-24_komaba-festival-day1/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/11-24_komaba-festival-day1/image.webp
rename to contents/articles/2023/11-24_komaba-festival-day1/thumbnail.webp
diff --git a/contents/articles/2023/11-25_komaba-festival-day2/index.mdx b/contents/articles/2023/11-25_komaba-festival-day2/index.md
similarity index 96%
rename from contents/articles/2023/11-25_komaba-festival-day2/index.mdx
rename to contents/articles/2023/11-25_komaba-festival-day2/index.md
index c6607af2..c0d0a932 100644
--- a/contents/articles/2023/11-25_komaba-festival-day2/index.mdx
+++ b/contents/articles/2023/11-25_komaba-festival-day2/index.md
@@ -3,7 +3,8 @@ title: 第 74 回駒場祭の 2 日目に参加しました。
 date: 2023-11-25T18:00:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/11-25_komaba-festival-day2/image.webp b/contents/articles/2023/11-25_komaba-festival-day2/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/11-25_komaba-festival-day2/image.webp
rename to contents/articles/2023/11-25_komaba-festival-day2/thumbnail.webp
diff --git a/contents/articles/2023/11-26_komaba-festival-day3/index.mdx b/contents/articles/2023/11-26_komaba-festival-day3/index.md
similarity index 97%
rename from contents/articles/2023/11-26_komaba-festival-day3/index.mdx
rename to contents/articles/2023/11-26_komaba-festival-day3/index.md
index 343b4b63..a2816daf 100644
--- a/contents/articles/2023/11-26_komaba-festival-day3/index.mdx
+++ b/contents/articles/2023/11-26_komaba-festival-day3/index.md
@@ -3,7 +3,8 @@ title: 第 74 回駒場祭の 3 日目に参加しました。
 date: 2023-11-26T20:00:00+09:00
 categories:
   - events
-image: ./image1.webp
+thumbnail:
+  src: ./image1.webp
 author: hhashimoto
 ---
 
diff --git a/contents/articles/2023/12-09_coeteco-hack-1-day1/index.mdx b/contents/articles/2023/12-09_coeteco-hack-1-day1/index.md
similarity index 96%
rename from contents/articles/2023/12-09_coeteco-hack-1-day1/index.mdx
rename to contents/articles/2023/12-09_coeteco-hack-1-day1/index.md
index ee5000b1..df70810c 100644
--- a/contents/articles/2023/12-09_coeteco-hack-1-day1/index.mdx
+++ b/contents/articles/2023/12-09_coeteco-hack-1-day1/index.md
@@ -3,7 +3,8 @@ title: "コエテコ Hack #1 の 1 日目が終了しました。"
 date: 2023-12-09T23:30:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/12-09_coeteco-hack-1-day1/image.webp b/contents/articles/2023/12-09_coeteco-hack-1-day1/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/12-09_coeteco-hack-1-day1/image.webp
rename to contents/articles/2023/12-09_coeteco-hack-1-day1/thumbnail.webp
diff --git a/contents/articles/2023/12-10_coeteco-hack-1-day2/index.mdx b/contents/articles/2023/12-10_coeteco-hack-1-day2/index.md
similarity index 99%
rename from contents/articles/2023/12-10_coeteco-hack-1-day2/index.mdx
rename to contents/articles/2023/12-10_coeteco-hack-1-day2/index.md
index 4e1128f2..84ad4d0b 100644
--- a/contents/articles/2023/12-10_coeteco-hack-1-day2/index.mdx
+++ b/contents/articles/2023/12-10_coeteco-hack-1-day2/index.md
@@ -3,7 +3,8 @@ title: "コエテコ Hack #1 の全日程が終了しました"
 date: 2023-12-10T23:30:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/12-10_coeteco-hack-1-day2/image.webp b/contents/articles/2023/12-10_coeteco-hack-1-day2/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/12-10_coeteco-hack-1-day2/image.webp
rename to contents/articles/2023/12-10_coeteco-hack-1-day2/thumbnail.webp
diff --git a/contents/articles/2023/12-13_gmo-workshop-12-16-announcement/index.mdx b/contents/articles/2023/12-13_gmo-workshop-12-16-announcement/index.md
similarity index 98%
rename from contents/articles/2023/12-13_gmo-workshop-12-16-announcement/index.mdx
rename to contents/articles/2023/12-13_gmo-workshop-12-16-announcement/index.md
index f84dd10b..b900d3c3 100644
--- a/contents/articles/2023/12-13_gmo-workshop-12-16-announcement/index.mdx
+++ b/contents/articles/2023/12-13_gmo-workshop-12-16-announcement/index.md
@@ -3,7 +3,8 @@ title: GMO インターネットグループ株式会社と勉強会を開催し
 date: 2023-12-13T18:00:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/12-13_gmo-workshop-12-16-announcement/image.webp b/contents/articles/2023/12-13_gmo-workshop-12-16-announcement/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/12-13_gmo-workshop-12-16-announcement/image.webp
rename to contents/articles/2023/12-13_gmo-workshop-12-16-announcement/thumbnail.webp
diff --git a/contents/articles/2023/12-13_kick-off-party/index.mdx b/contents/articles/2023/12-13_kick-off-party/index.mdx
index 6cff2424..0e25cb67 100644
--- a/contents/articles/2023/12-13_kick-off-party/index.mdx
+++ b/contents/articles/2023/12-13_kick-off-party/index.mdx
@@ -3,7 +3,8 @@ title: "2023年度大忘年会を開催します"
 date: 2023-12-13T00:00:00+09:00
 categories:
   - event
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 ---
 
 import ActionButton from "+/components/ActionButton.astro";
diff --git a/contents/articles/2023/12-13_kick-off-party/image.webp b/contents/articles/2023/12-13_kick-off-party/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/12-13_kick-off-party/image.webp
rename to contents/articles/2023/12-13_kick-off-party/thumbnail.webp
diff --git a/contents/articles/2023/12-14_-a-specialized-seminar-session-10/index.mdx b/contents/articles/2023/12-14_-a-specialized-seminar-session-10/index.md
similarity index 97%
rename from contents/articles/2023/12-14_-a-specialized-seminar-session-10/index.mdx
rename to contents/articles/2023/12-14_-a-specialized-seminar-session-10/index.md
index faae2dce..6375e2f1 100644
--- a/contents/articles/2023/12-14_-a-specialized-seminar-session-10/index.mdx
+++ b/contents/articles/2023/12-14_-a-specialized-seminar-session-10/index.md
@@ -3,7 +3,8 @@ title: 全ゼミの第 10 回を開講しました。
 date: 2023-12-14T22:00:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/12-14_-a-specialized-seminar-session-10/image.webp b/contents/articles/2023/12-14_-a-specialized-seminar-session-10/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/12-14_-a-specialized-seminar-session-10/image.webp
rename to contents/articles/2023/12-14_-a-specialized-seminar-session-10/thumbnail.webp
diff --git a/contents/articles/2023/12-16_gmo-workshop-12-16/index.mdx b/contents/articles/2023/12-16_gmo-workshop-12-16/index.md
similarity index 97%
rename from contents/articles/2023/12-16_gmo-workshop-12-16/index.mdx
rename to contents/articles/2023/12-16_gmo-workshop-12-16/index.md
index b06ad983..7f1f008c 100644
--- a/contents/articles/2023/12-16_gmo-workshop-12-16/index.mdx
+++ b/contents/articles/2023/12-16_gmo-workshop-12-16/index.md
@@ -3,7 +3,8 @@ title: GMO インターネットグループ株式会社と勉強会を開催し
 date: 2023-12-16T16:00:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/12-16_gmo-workshop-12-16/image.webp b/contents/articles/2023/12-16_gmo-workshop-12-16/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/12-16_gmo-workshop-12-16/image.webp
rename to contents/articles/2023/12-16_gmo-workshop-12-16/thumbnail.webp
diff --git a/contents/articles/2023/12-21_-a-specialized-seminar-session-11/index.mdx b/contents/articles/2023/12-21_-a-specialized-seminar-session-11/index.md
similarity index 97%
rename from contents/articles/2023/12-21_-a-specialized-seminar-session-11/index.mdx
rename to contents/articles/2023/12-21_-a-specialized-seminar-session-11/index.md
index d16d0f9b..b779772b 100644
--- a/contents/articles/2023/12-21_-a-specialized-seminar-session-11/index.mdx
+++ b/contents/articles/2023/12-21_-a-specialized-seminar-session-11/index.md
@@ -3,7 +3,8 @@ title: 全ゼミの第 11 回を開講しました。
 date: 2023-12-21T22:00:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/12-21_-a-specialized-seminar-session-11/image.webp b/contents/articles/2023/12-21_-a-specialized-seminar-session-11/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/12-21_-a-specialized-seminar-session-11/image.webp
rename to contents/articles/2023/12-21_-a-specialized-seminar-session-11/thumbnail.webp
diff --git a/contents/articles/2023/12-22_kick-off-party-report/index.mdx b/contents/articles/2023/12-22_kick-off-party-report/index.md
similarity index 96%
rename from contents/articles/2023/12-22_kick-off-party-report/index.mdx
rename to contents/articles/2023/12-22_kick-off-party-report/index.md
index 7c6a51e9..cab0d88f 100644
--- a/contents/articles/2023/12-22_kick-off-party-report/index.mdx
+++ b/contents/articles/2023/12-22_kick-off-party-report/index.md
@@ -3,7 +3,8 @@ title: 2023 年度大忘年会を開催しました！
 date: 2023-12-22T22:00:00+09:00
 categories:
   - event
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2023/12-22_kick-off-party-report/image.webp b/contents/articles/2023/12-22_kick-off-party-report/thumbnail.webp
similarity index 100%
rename from contents/articles/2023/12-22_kick-off-party-report/image.webp
rename to contents/articles/2023/12-22_kick-off-party-report/thumbnail.webp
diff --git a/contents/articles/2024/01-04_2023-a-specialized-seminar-session-12/index.mdx b/contents/articles/2024/01-04_2023-a-specialized-seminar-session-12/index.md
similarity index 97%
rename from contents/articles/2024/01-04_2023-a-specialized-seminar-session-12/index.mdx
rename to contents/articles/2024/01-04_2023-a-specialized-seminar-session-12/index.md
index 8eba1099..d5a066e7 100644
--- a/contents/articles/2024/01-04_2023-a-specialized-seminar-session-12/index.mdx
+++ b/contents/articles/2024/01-04_2023-a-specialized-seminar-session-12/index.md
@@ -3,7 +3,8 @@ title: 全ゼミの第 12 回を開講しました。
 date: 2024-01-04T23:00:00+09:00
 categories:
   - events
-image: ./image.png
+thumbnail:
+  src: ./thumbnail.png
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/01-04_2023-a-specialized-seminar-session-12/image.png b/contents/articles/2024/01-04_2023-a-specialized-seminar-session-12/thumbnail.png
similarity index 100%
rename from contents/articles/2024/01-04_2023-a-specialized-seminar-session-12/image.png
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diff --git a/contents/articles/2024/01-11_2023-a-specialized-seminar-session-13/index.mdx b/contents/articles/2024/01-11_2023-a-specialized-seminar-session-13/index.md
similarity index 98%
rename from contents/articles/2024/01-11_2023-a-specialized-seminar-session-13/index.mdx
rename to contents/articles/2024/01-11_2023-a-specialized-seminar-session-13/index.md
index 02b3e880..48fd0540 100644
--- a/contents/articles/2024/01-11_2023-a-specialized-seminar-session-13/index.mdx
+++ b/contents/articles/2024/01-11_2023-a-specialized-seminar-session-13/index.md
@@ -3,7 +3,8 @@ title: 全ゼミの第 13 回を開講しました。
 date: 2024-01-11T23:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/01-11_2023-a-specialized-seminar-session-13/image.jpg b/contents/articles/2024/01-11_2023-a-specialized-seminar-session-13/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/01-11_2023-a-specialized-seminar-session-13/image.jpg
rename to contents/articles/2024/01-11_2023-a-specialized-seminar-session-13/thumbnail.jpg
diff --git a/contents/articles/2024/01-27_new-projects-announcement/index.mdx b/contents/articles/2024/01-27_new-projects-announcement/index.md
similarity index 97%
rename from contents/articles/2024/01-27_new-projects-announcement/index.mdx
rename to contents/articles/2024/01-27_new-projects-announcement/index.md
index a2761b4c..affb8f78 100644
--- a/contents/articles/2024/01-27_new-projects-announcement/index.mdx
+++ b/contents/articles/2024/01-27_new-projects-announcement/index.md
@@ -3,7 +3,8 @@ title: 新プロジェクトが発足しました
 date: 2024-01-27T23:20:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/01-27_new-projects-announcement/image.jpg b/contents/articles/2024/01-27_new-projects-announcement/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/01-27_new-projects-announcement/image.jpg
rename to contents/articles/2024/01-27_new-projects-announcement/thumbnail.jpg
diff --git a/contents/articles/2024/02-06_2023-a-specialized-seminar-report/index.mdx b/contents/articles/2024/02-06_2023-a-specialized-seminar-report/index.md
similarity index 99%
rename from contents/articles/2024/02-06_2023-a-specialized-seminar-report/index.mdx
rename to contents/articles/2024/02-06_2023-a-specialized-seminar-report/index.md
index fef6e341..1388a08c 100644
--- a/contents/articles/2024/02-06_2023-a-specialized-seminar-report/index.mdx
+++ b/contents/articles/2024/02-06_2023-a-specialized-seminar-report/index.md
@@ -3,7 +3,8 @@ title: 2023 年度 A セメスターの全ゼミの振り返り
 date: 2024-02-06T16:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/02-06_2023-a-specialized-seminar-report/image.jpg b/contents/articles/2024/02-06_2023-a-specialized-seminar-report/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/02-06_2023-a-specialized-seminar-report/image.jpg
rename to contents/articles/2024/02-06_2023-a-specialized-seminar-report/thumbnail.jpg
diff --git a/contents/articles/2024/02-16_s-specialized-seminar-kickoff/index.mdx b/contents/articles/2024/02-16_s-specialized-seminar-kickoff/index.md
similarity index 98%
rename from contents/articles/2024/02-16_s-specialized-seminar-kickoff/index.mdx
rename to contents/articles/2024/02-16_s-specialized-seminar-kickoff/index.md
index e2fd7485..9bff8b85 100644
--- a/contents/articles/2024/02-16_s-specialized-seminar-kickoff/index.mdx
+++ b/contents/articles/2024/02-16_s-specialized-seminar-kickoff/index.md
@@ -3,7 +3,8 @@ title: 2024 年度 S セメスター全ゼミ運営の準備を開始しまし
 date: 2024-02-16T16:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: snakamura
 ---
 
diff --git a/contents/articles/2024/02-16_s-specialized-seminar-kickoff/image.jpg b/contents/articles/2024/02-16_s-specialized-seminar-kickoff/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/02-16_s-specialized-seminar-kickoff/image.jpg
rename to contents/articles/2024/02-16_s-specialized-seminar-kickoff/thumbnail.jpg
diff --git a/contents/articles/2024/02-17_may-festival-97-brainstorming/index.mdx b/contents/articles/2024/02-17_may-festival-97-brainstorming/index.md
similarity index 97%
rename from contents/articles/2024/02-17_may-festival-97-brainstorming/index.mdx
rename to contents/articles/2024/02-17_may-festival-97-brainstorming/index.md
index 095397fc..d6909cd8 100644
--- a/contents/articles/2024/02-17_may-festival-97-brainstorming/index.mdx
+++ b/contents/articles/2024/02-17_may-festival-97-brainstorming/index.md
@@ -3,7 +3,8 @@ title: 五月祭プロジェクトのブレストをしました
 date: 2024-02-17T18:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/02-17_may-festival-97-brainstorming/image.jpg b/contents/articles/2024/02-17_may-festival-97-brainstorming/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/02-17_may-festival-97-brainstorming/image.jpg
rename to contents/articles/2024/02-17_may-festival-97-brainstorming/thumbnail.jpg
diff --git a/contents/articles/2024/02-20_alumni-talk-event/index.mdx b/contents/articles/2024/02-20_alumni-talk-event/index.md
similarity index 97%
rename from contents/articles/2024/02-20_alumni-talk-event/index.mdx
rename to contents/articles/2024/02-20_alumni-talk-event/index.md
index 80f96dba..b3cf83f6 100644
--- a/contents/articles/2024/02-20_alumni-talk-event/index.mdx
+++ b/contents/articles/2024/02-20_alumni-talk-event/index.md
@@ -3,7 +3,8 @@ title: OB / OG トークイベントを開催しました
 date: 2024-02-20T23:00:00+09:00
 categories:
   - events
-image: ./image.png
+thumbnail:
+  src: ./thumbnail.png
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/02-20_alumni-talk-event/image.png b/contents/articles/2024/02-20_alumni-talk-event/thumbnail.png
similarity index 100%
rename from contents/articles/2024/02-20_alumni-talk-event/image.png
rename to contents/articles/2024/02-20_alumni-talk-event/thumbnail.png
diff --git a/contents/articles/2024/02-24_material-design-3-reading-2-24/index.mdx b/contents/articles/2024/02-24_material-design-3-reading-2-24/index.md
similarity index 97%
rename from contents/articles/2024/02-24_material-design-3-reading-2-24/index.mdx
rename to contents/articles/2024/02-24_material-design-3-reading-2-24/index.md
index f5d04abd..70127cbf 100644
--- a/contents/articles/2024/02-24_material-design-3-reading-2-24/index.mdx
+++ b/contents/articles/2024/02-24_material-design-3-reading-2-24/index.md
@@ -3,7 +3,8 @@ title: Material Design 3 の輪読会を開始しました
 date: 2024-02-24T09:00:00+09:00
 categories:
   - events
-image: ./image.png
+thumbnail:
+  src: ./thumbnail.png
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/02-24_material-design-3-reading-2-24/image.png b/contents/articles/2024/02-24_material-design-3-reading-2-24/thumbnail.png
similarity index 100%
rename from contents/articles/2024/02-24_material-design-3-reading-2-24/image.png
rename to contents/articles/2024/02-24_material-design-3-reading-2-24/thumbnail.png
diff --git a/contents/articles/2024/03-26_spring-camp/index.mdx b/contents/articles/2024/03-26_spring-camp/index.md
similarity index 98%
rename from contents/articles/2024/03-26_spring-camp/index.mdx
rename to contents/articles/2024/03-26_spring-camp/index.md
index 40d2a3e8..ed28e6fa 100644
--- a/contents/articles/2024/03-26_spring-camp/index.mdx
+++ b/contents/articles/2024/03-26_spring-camp/index.md
@@ -3,7 +3,8 @@ title: "2024年度春合宿を開催しました！"
 date: 2024-03-26T12:00:00+09:00
 categories:
   - event
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: stoko
 ---
 
diff --git a/contents/articles/2024/03-26_spring-camp/image.jpg b/contents/articles/2024/03-26_spring-camp/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/03-26_spring-camp/image.jpg
rename to contents/articles/2024/03-26_spring-camp/thumbnail.jpg
diff --git a/contents/articles/2024/03-31_s-specialized-seminar-announcement/index.mdx b/contents/articles/2024/03-31_s-specialized-seminar-announcement/index.md
similarity index 98%
rename from contents/articles/2024/03-31_s-specialized-seminar-announcement/index.mdx
rename to contents/articles/2024/03-31_s-specialized-seminar-announcement/index.md
index 633beb0d..83300e0f 100644
--- a/contents/articles/2024/03-31_s-specialized-seminar-announcement/index.mdx
+++ b/contents/articles/2024/03-31_s-specialized-seminar-announcement/index.md
@@ -3,7 +3,8 @@ title: 2024 年度 S セメスター全ゼミ開講のお知らせ
 date: 2024-03-31T12:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/03-31_s-specialized-seminar-announcement/image.jpg b/contents/articles/2024/03-31_s-specialized-seminar-announcement/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/03-31_s-specialized-seminar-announcement/image.jpg
rename to contents/articles/2024/03-31_s-specialized-seminar-announcement/thumbnail.jpg
diff --git a/contents/articles/2024/03-31_welcome-events/index.mdx b/contents/articles/2024/03-31_welcome-events/index.mdx
index ba48c2b5..e5bd668b 100644
--- a/contents/articles/2024/03-31_welcome-events/index.mdx
+++ b/contents/articles/2024/03-31_welcome-events/index.mdx
@@ -3,7 +3,8 @@ title: 2024 年度新歓日程
 date: 2024-03-31T13:00:00+09:00
 categories:
   - events
-image: ./image.png
+thumbnail:
+  src: ./thumbnail.png
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/03-31_welcome-events/image.png b/contents/articles/2024/03-31_welcome-events/thumbnail.png
similarity index 100%
rename from contents/articles/2024/03-31_welcome-events/image.png
rename to contents/articles/2024/03-31_welcome-events/thumbnail.png
diff --git a/contents/articles/2024/04-03_S-syllabus/index.mdx b/contents/articles/2024/04-03_S-syllabus/index.md
similarity index 95%
rename from contents/articles/2024/04-03_S-syllabus/index.mdx
rename to contents/articles/2024/04-03_S-syllabus/index.md
index 02d499cd..a7c5b7ab 100644
--- a/contents/articles/2024/04-03_S-syllabus/index.mdx
+++ b/contents/articles/2024/04-03_S-syllabus/index.md
@@ -3,7 +3,8 @@ title: シ楽バスが2024年度Sセメスターに対応しました
 date: 2024-04-03T23:00:00+09:00
 categories:
   - events
-image: ./image.png
+thumbnail:
+  src: ./thumbnail.png
 ---
 
 ut.code(); は、[シ楽バス](https://syllabus.utcode.net/)を2024年度Sセメスターに対応するアップデートを行いました。
diff --git a/contents/articles/2024/04-03_S-syllabus/image.png b/contents/articles/2024/04-03_S-syllabus/thumbnail.png
similarity index 100%
rename from contents/articles/2024/04-03_S-syllabus/image.png
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diff --git a/contents/articles/2024/04-20_welcome-workshop/index.mdx b/contents/articles/2024/04-20_welcome-workshop/index.md
similarity index 97%
rename from contents/articles/2024/04-20_welcome-workshop/index.mdx
rename to contents/articles/2024/04-20_welcome-workshop/index.md
index 96f5cea7..04d2509c 100644
--- a/contents/articles/2024/04-20_welcome-workshop/index.mdx
+++ b/contents/articles/2024/04-20_welcome-workshop/index.md
@@ -3,7 +3,8 @@ title: 新歓体験会を開催しました
 date: 2024-04-20T23:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/04-20_welcome-workshop/image.jpg b/contents/articles/2024/04-20_welcome-workshop/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/04-20_welcome-workshop/image.jpg
rename to contents/articles/2024/04-20_welcome-workshop/thumbnail.jpg
diff --git a/contents/articles/2024/04-22_mf-interim-report-meeting/index.mdx b/contents/articles/2024/04-22_mf-interim-report-meeting/index.md
similarity index 98%
rename from contents/articles/2024/04-22_mf-interim-report-meeting/index.mdx
rename to contents/articles/2024/04-22_mf-interim-report-meeting/index.md
index 92661341..46f800e0 100644
--- a/contents/articles/2024/04-22_mf-interim-report-meeting/index.mdx
+++ b/contents/articles/2024/04-22_mf-interim-report-meeting/index.md
@@ -3,7 +3,8 @@ title: 五月祭プロジェクトの中間報告会を行いました
 date: 2024-04-22T10:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: snakamura
 ---
 
diff --git a/contents/articles/2024/04-22_mf-interim-report-meeting/image.jpg b/contents/articles/2024/04-22_mf-interim-report-meeting/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/04-22_mf-interim-report-meeting/image.jpg
rename to contents/articles/2024/04-22_mf-interim-report-meeting/thumbnail.jpg
diff --git a/contents/articles/2024/04-27_GW-events/index.mdx b/contents/articles/2024/04-27_GW-events/index.mdx
index 1ee0e6b5..4357b01f 100644
--- a/contents/articles/2024/04-27_GW-events/index.mdx
+++ b/contents/articles/2024/04-27_GW-events/index.mdx
@@ -3,7 +3,8 @@ title: 2024 年度 GW 講習会を開催します
 date: 2024-04-27T18:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: hhashimoto
 ---
 
diff --git a/contents/articles/2024/04-27_GW-events/image.jpg b/contents/articles/2024/04-27_GW-events/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/04-27_GW-events/image.jpg
rename to contents/articles/2024/04-27_GW-events/thumbnail.jpg
diff --git a/contents/articles/2024/04-27_namiki-secondary-school-ssh-seminar/index.mdx b/contents/articles/2024/04-27_namiki-secondary-school-ssh-seminar/index.md
similarity index 99%
rename from contents/articles/2024/04-27_namiki-secondary-school-ssh-seminar/index.mdx
rename to contents/articles/2024/04-27_namiki-secondary-school-ssh-seminar/index.md
index 1190eed2..a2fde096 100644
--- a/contents/articles/2024/04-27_namiki-secondary-school-ssh-seminar/index.mdx
+++ b/contents/articles/2024/04-27_namiki-secondary-school-ssh-seminar/index.md
@@ -3,7 +3,8 @@ title: 並木中等教育学校で SSH 講座を開催しました
 date: 2024-04-27T22:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/04-27_namiki-secondary-school-ssh-seminar/image.jpg b/contents/articles/2024/04-27_namiki-secondary-school-ssh-seminar/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/04-27_namiki-secondary-school-ssh-seminar/image.jpg
rename to contents/articles/2024/04-27_namiki-secondary-school-ssh-seminar/thumbnail.jpg
diff --git a/contents/articles/2024/05-05_gw-events-report/index.mdx b/contents/articles/2024/05-05_gw-events-report/index.md
similarity index 99%
rename from contents/articles/2024/05-05_gw-events-report/index.mdx
rename to contents/articles/2024/05-05_gw-events-report/index.md
index 95933137..baac8c27 100644
--- a/contents/articles/2024/05-05_gw-events-report/index.mdx
+++ b/contents/articles/2024/05-05_gw-events-report/index.md
@@ -3,7 +3,8 @@ title: GW 講習会を開催しました
 date: 2024-05-05T23:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/05-05_gw-events-report/image.jpg b/contents/articles/2024/05-05_gw-events-report/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/05-05_gw-events-report/image.jpg
rename to contents/articles/2024/05-05_gw-events-report/thumbnail.jpg
diff --git a/contents/articles/2024/05-11_geekhakureport/index.mdx b/contents/articles/2024/05-11_geekhakureport/index.md
similarity index 97%
rename from contents/articles/2024/05-11_geekhakureport/index.mdx
rename to contents/articles/2024/05-11_geekhakureport/index.md
index 5ae29484..d3168367 100644
--- a/contents/articles/2024/05-11_geekhakureport/index.mdx
+++ b/contents/articles/2024/05-11_geekhakureport/index.md
@@ -3,7 +3,8 @@ title: "技育博2024に参加しました"
 date: 2024-05-11T12:00:00+09:00
 categories:
   - "events"
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 ---
 
 ut.code();は、[技育博2024](https://twitter.com/geek_pjt/status/1789225150996767102?t=YfiqPxqcbqiTNQ58a13oFA&s=19)に参加しました。
diff --git a/contents/articles/2024/05-11_geekhakureport/image.jpg b/contents/articles/2024/05-11_geekhakureport/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/05-11_geekhakureport/image.jpg
rename to contents/articles/2024/05-11_geekhakureport/thumbnail.jpg
diff --git a/contents/articles/2024/05-11_specialized-seminar-report-1/index.mdx b/contents/articles/2024/05-11_specialized-seminar-report-1/index.md
similarity index 99%
rename from contents/articles/2024/05-11_specialized-seminar-report-1/index.mdx
rename to contents/articles/2024/05-11_specialized-seminar-report-1/index.md
index 68f7a199..d3088c79 100644
--- a/contents/articles/2024/05-11_specialized-seminar-report-1/index.mdx
+++ b/contents/articles/2024/05-11_specialized-seminar-report-1/index.md
@@ -3,7 +3,8 @@ title: 全ゼミが開始しました
 date: 2024-05-11T12:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/05-11_specialized-seminar-report-1/image.jpg b/contents/articles/2024/05-11_specialized-seminar-report-1/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/05-11_specialized-seminar-report-1/image.jpg
rename to contents/articles/2024/05-11_specialized-seminar-report-1/thumbnail.jpg
diff --git a/contents/articles/2024/05-14-may-festival/index.mdx b/contents/articles/2024/05-14-may-festival/index.md
similarity index 98%
rename from contents/articles/2024/05-14-may-festival/index.mdx
rename to contents/articles/2024/05-14-may-festival/index.md
index eac620bd..07a8a956 100644
--- a/contents/articles/2024/05-14-may-festival/index.mdx
+++ b/contents/articles/2024/05-14-may-festival/index.md
@@ -3,7 +3,8 @@ title: "第 97 回五月祭に参加します"
 date: 2024-05-14T12:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ykobayashi
 ---
 
diff --git a/contents/articles/2024/05-14-may-festival/image.jpg b/contents/articles/2024/05-14-may-festival/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/05-14-may-festival/image.jpg
rename to contents/articles/2024/05-14-may-festival/thumbnail.jpg
diff --git a/contents/articles/2024/05-17_june-hackathon/index.mdx b/contents/articles/2024/05-17_june-hackathon/index.md
similarity index 97%
rename from contents/articles/2024/05-17_june-hackathon/index.mdx
rename to contents/articles/2024/05-17_june-hackathon/index.md
index 471bb4d5..5d31978b 100644
--- a/contents/articles/2024/05-17_june-hackathon/index.mdx
+++ b/contents/articles/2024/05-17_june-hackathon/index.md
@@ -3,7 +3,8 @@ title: "ハッカソンを開催します"
 date: 2024-05-17T12:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: kanan
 ---
 
diff --git a/contents/articles/2024/05-17_june-hackathon/image.jpg b/contents/articles/2024/05-17_june-hackathon/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/05-17_june-hackathon/image.jpg
rename to contents/articles/2024/05-17_june-hackathon/thumbnail.jpg
diff --git a/contents/articles/2024/05-19_may-festival-97-report/index.mdx b/contents/articles/2024/05-19_may-festival-97-report/index.md
similarity index 98%
rename from contents/articles/2024/05-19_may-festival-97-report/index.mdx
rename to contents/articles/2024/05-19_may-festival-97-report/index.md
index d50e8a4a..1306824c 100644
--- a/contents/articles/2024/05-19_may-festival-97-report/index.mdx
+++ b/contents/articles/2024/05-19_may-festival-97-report/index.md
@@ -3,7 +3,8 @@ title: 五月祭に参加しました
 date: 2024-05-19T18:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/05-19_may-festival-97-report/image.jpg b/contents/articles/2024/05-19_may-festival-97-report/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/05-19_may-festival-97-report/image.jpg
rename to contents/articles/2024/05-19_may-festival-97-report/thumbnail.jpg
diff --git a/contents/articles/2024/06-09_06-hackathon/index.md b/contents/articles/2024/06-09_06-hackathon/index.md
index 242a20a2..90114358 100644
--- a/contents/articles/2024/06-09_06-hackathon/index.md
+++ b/contents/articles/2024/06-09_06-hackathon/index.md
@@ -3,7 +3,8 @@ title: ハッカソンを開催しました
 date: 2024-06-09T19:00:00+09:00
 categories:
   - events
-image: ./thumbnail.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: kanan
 ---
 
diff --git a/contents/articles/2024/06-29_06-programming-course/index.md b/contents/articles/2024/06-29_06-programming-course/index.md
index adcdb38b..85fb8642 100644
--- a/contents/articles/2024/06-29_06-programming-course/index.md
+++ b/contents/articles/2024/06-29_06-programming-course/index.md
@@ -3,7 +3,8 @@ title: 中高生のためのプログラミング講座を開催しました
 date: 2024-06-29T18:00:00+09:00
 categories:
   - events
-image: ./image.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: kmanabe
 ---
 
diff --git a/contents/articles/2024/06-29_06-programming-course/image.webp b/contents/articles/2024/06-29_06-programming-course/thumbnail.webp
similarity index 100%
rename from contents/articles/2024/06-29_06-programming-course/image.webp
rename to contents/articles/2024/06-29_06-programming-course/thumbnail.webp
diff --git a/contents/articles/2024/06-30_new-representatives/index.mdx b/contents/articles/2024/06-30_new-representatives/index.md
similarity index 99%
rename from contents/articles/2024/06-30_new-representatives/index.mdx
rename to contents/articles/2024/06-30_new-representatives/index.md
index d7145e11..4758f1a4 100644
--- a/contents/articles/2024/06-30_new-representatives/index.mdx
+++ b/contents/articles/2024/06-30_new-representatives/index.md
@@ -1,7 +1,8 @@
 ---
 title: 代表が交代しました
 date: 2024-06-30T10:00:00+09:00
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/06-30_new-representatives/image.jpg b/contents/articles/2024/06-30_new-representatives/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/06-30_new-representatives/image.jpg
rename to contents/articles/2024/06-30_new-representatives/thumbnail.jpg
diff --git a/contents/articles/2024/07-05_coeteco-hack-2-announcement/index.mdx b/contents/articles/2024/07-05_coeteco-hack-2-announcement/index.mdx
index ae2b345f..8310cb46 100644
--- a/contents/articles/2024/07-05_coeteco-hack-2-announcement/index.mdx
+++ b/contents/articles/2024/07-05_coeteco-hack-2-announcement/index.mdx
@@ -3,7 +3,8 @@ title: "コエテコ Hack byGMO #02 開催のお知らせ"
 date: 2024-07-08T09:00:00+09:00
 categories:
   - events
-image: ./image.png
+thumbnail:
+  src: ./thumbnail.png
 ---
 
 ut.code(); は、2024 年 8 月 31 日（土）と 9 月 1 日（日）の 2 日間、GMO メディア株式会社が運営するプログラミング教育ポータルサイト「[コエテコ byGMO](https://coeteco.jp/)」と共同で、ハッカソンイベント『コエテコ Hack byGMO #02』を開催します。
diff --git a/contents/articles/2024/07-05_coeteco-hack-2-announcement/image.png b/contents/articles/2024/07-05_coeteco-hack-2-announcement/thumbnail.png
similarity index 100%
rename from contents/articles/2024/07-05_coeteco-hack-2-announcement/image.png
rename to contents/articles/2024/07-05_coeteco-hack-2-announcement/thumbnail.png
diff --git a/contents/articles/2024/07-13_s-specialized-seminar-report-2/index.md b/contents/articles/2024/07-13_s-specialized-seminar-report-2/index.md
index 6ae5a242..e7bceef7 100644
--- a/contents/articles/2024/07-13_s-specialized-seminar-report-2/index.md
+++ b/contents/articles/2024/07-13_s-specialized-seminar-report-2/index.md
@@ -1,7 +1,8 @@
 ---
 title: 全ゼミが終了しました
 date: 2024-07-14T19:00:00+09:00
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/07-13_s-specialized-seminar-report-2/image.jpg b/contents/articles/2024/07-13_s-specialized-seminar-report-2/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/07-13_s-specialized-seminar-report-2/image.jpg
rename to contents/articles/2024/07-13_s-specialized-seminar-report-2/thumbnail.jpg
diff --git a/contents/articles/2024/08-04_a-seminar-and-komaba-festival-75-kickoff/index.mdx b/contents/articles/2024/08-04_a-seminar-and-komaba-festival-75-kickoff/index.md
similarity index 99%
rename from contents/articles/2024/08-04_a-seminar-and-komaba-festival-75-kickoff/index.mdx
rename to contents/articles/2024/08-04_a-seminar-and-komaba-festival-75-kickoff/index.md
index 56935add..75980ad0 100644
--- a/contents/articles/2024/08-04_a-seminar-and-komaba-festival-75-kickoff/index.mdx
+++ b/contents/articles/2024/08-04_a-seminar-and-komaba-festival-75-kickoff/index.md
@@ -1,7 +1,8 @@
 ---
 title: 自主ゼミと駒場祭のキックオフをしました
 date: 2024-08-04T22:00:00+09:00
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/08-04_a-seminar-and-komaba-festival-75-kickoff/image.jpg b/contents/articles/2024/08-04_a-seminar-and-komaba-festival-75-kickoff/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/08-04_a-seminar-and-komaba-festival-75-kickoff/image.jpg
rename to contents/articles/2024/08-04_a-seminar-and-komaba-festival-75-kickoff/thumbnail.jpg
diff --git a/contents/articles/2024/09-01_coeteco-hack-2-article/index.md b/contents/articles/2024/09-01_coeteco-hack-2-article/index.md
index 868ed5b9..393f40e1 100644
--- a/contents/articles/2024/09-01_coeteco-hack-2-article/index.md
+++ b/contents/articles/2024/09-01_coeteco-hack-2-article/index.md
@@ -3,7 +3,8 @@ title: "コエテコ Hack #02 の全日程が終了しました"
 date: 2024-09-02T23:30:00+09:00
 categories:
   - events
-image: ./thumbnail.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: kmanabe
 ---
 
diff --git a/contents/articles/2024/09-23_clubroom-renovation/index.mdx b/contents/articles/2024/09-23_clubroom-renovation/index.md
similarity index 97%
rename from contents/articles/2024/09-23_clubroom-renovation/index.mdx
rename to contents/articles/2024/09-23_clubroom-renovation/index.md
index d7de60c6..c9d66edb 100644
--- a/contents/articles/2024/09-23_clubroom-renovation/index.mdx
+++ b/contents/articles/2024/09-23_clubroom-renovation/index.md
@@ -1,7 +1,8 @@
 ---
 title: 部室をリノベーションしました
 date: 2024-09-23T22:00:00+09:00
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: kmanabe
 ---
 
diff --git a/contents/articles/2024/09-23_clubroom-renovation/image.jpg b/contents/articles/2024/09-23_clubroom-renovation/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/09-23_clubroom-renovation/image.jpg
rename to contents/articles/2024/09-23_clubroom-renovation/thumbnail.jpg
diff --git a/contents/articles/2024/09-24_seminar-detail/index.mdx b/contents/articles/2024/09-24_seminar-detail/index.md
similarity index 98%
rename from contents/articles/2024/09-24_seminar-detail/index.mdx
rename to contents/articles/2024/09-24_seminar-detail/index.md
index df32f1c9..68a97b74 100644
--- a/contents/articles/2024/09-24_seminar-detail/index.mdx
+++ b/contents/articles/2024/09-24_seminar-detail/index.md
@@ -3,7 +3,8 @@ title: 2024年度 A セメスター自主ゼミのお知らせ
 date: 2024-09-24T22:00:00+09:00
 categories:
   - info
-image: ./image.png
+thumbnail:
+  src: ./thumbnail.png
 author: rtakanaka
 ---
 
diff --git a/contents/articles/2024/09-24_seminar-detail/image.png b/contents/articles/2024/09-24_seminar-detail/thumbnail.png
similarity index 100%
rename from contents/articles/2024/09-24_seminar-detail/image.png
rename to contents/articles/2024/09-24_seminar-detail/thumbnail.png
diff --git a/contents/articles/2024/09-29_summer-camp/index.md b/contents/articles/2024/09-29_summer-camp/index.md
index bcaaf660..3df7442e 100644
--- a/contents/articles/2024/09-29_summer-camp/index.md
+++ b/contents/articles/2024/09-29_summer-camp/index.md
@@ -1,7 +1,8 @@
 ---
 title: 2024 年度夏合宿を開催しました
 date: 2024-09-29T22:00:00+09:00
-image: ./thumbnail.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: snakamura
 ---
 
diff --git a/contents/articles/2024/10-06_on-site-meeting-72nd/index.mdx b/contents/articles/2024/10-06_on-site-meeting-72nd/index.md
similarity index 97%
rename from contents/articles/2024/10-06_on-site-meeting-72nd/index.mdx
rename to contents/articles/2024/10-06_on-site-meeting-72nd/index.md
index f7819765..af205184 100644
--- a/contents/articles/2024/10-06_on-site-meeting-72nd/index.mdx
+++ b/contents/articles/2024/10-06_on-site-meeting-72nd/index.md
@@ -1,7 +1,8 @@
 ---
 title: 第 72 回運営ミーティングを部室で実施しました
 date: 2024-10-06T20:00:00+09:00
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: snakamura
 ---
 
diff --git a/contents/articles/2024/10-06_on-site-meeting-72nd/image.jpg b/contents/articles/2024/10-06_on-site-meeting-72nd/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/10-06_on-site-meeting-72nd/image.jpg
rename to contents/articles/2024/10-06_on-site-meeting-72nd/thumbnail.jpg
diff --git a/contents/articles/2024/11-02_sparcs-utcode/index.md b/contents/articles/2024/11-02_sparcs-utcode/index.md
index 951adb3e..cf994d1c 100644
--- a/contents/articles/2024/11-02_sparcs-utcode/index.md
+++ b/contents/articles/2024/11-02_sparcs-utcode/index.md
@@ -1,7 +1,8 @@
 ---
 title: SPARCS × ut.code(); 合同交流会2024を開催しました
 date: 2024-11-02T21:00:00+09:00
-image: ./thumbnail.webp
+thumbnail:
+  src: ./thumbnail.webp
 author: ywatahiki
 ---
 
diff --git a/contents/articles/2024/11-26_komaba-festival/image1.jpg b/contents/articles/2024/11-26_komaba-festival/image1.jpg
index e4beb689..658d29ab 100644
Binary files a/contents/articles/2024/11-26_komaba-festival/image1.jpg and b/contents/articles/2024/11-26_komaba-festival/image1.jpg differ
diff --git a/contents/articles/2024/11-26_komaba-festival/image2.jpg b/contents/articles/2024/11-26_komaba-festival/image2.jpg
deleted file mode 100644
index 658d29ab..00000000
Binary files a/contents/articles/2024/11-26_komaba-festival/image2.jpg and /dev/null differ
diff --git a/contents/articles/2024/11-26_komaba-festival/index.mdx b/contents/articles/2024/11-26_komaba-festival/index.md
similarity index 91%
rename from contents/articles/2024/11-26_komaba-festival/index.mdx
rename to contents/articles/2024/11-26_komaba-festival/index.md
index 858139dc..4e27b101 100644
--- a/contents/articles/2024/11-26_komaba-festival/index.mdx
+++ b/contents/articles/2024/11-26_komaba-festival/index.md
@@ -3,9 +3,10 @@ title: 第 75 回駒場祭に出展しました。
 date: 2024-11-26T20:00:00+09:00
 categories:
   - events
-image: ./image1.jpg
+thumbnail:
+  src: ./thumbnail.jpg
+  position: top
 author: kmanabe
-position: top
 ---
 
 ut.code(); は、2024 年 11 月 22 〜 24 日の合計 3 日間駒場祭に企画を出展しました。今回も多くの方にお越しいただきました。3 日間を通して来場してくださった皆様、ありがとうございました！
@@ -20,4 +21,4 @@ ut.code(); は、2024 年 11 月 22 〜 24 日の合計 3 日間駒場祭に企
 
 改めまして、ご来場ありがとうございました。よろしければ、来年の第 98 回五月祭でまたお会いしましょう。
 
-![企画を体験している様子](./image2.jpg)
+![企画を体験している様子](./image1.jpg)
diff --git a/contents/articles/2024/11-26_komaba-festival/thumbnail.jpg b/contents/articles/2024/11-26_komaba-festival/thumbnail.jpg
new file mode 100644
index 00000000..e4beb689
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diff --git a/contents/articles/2024/12-21_kick-off-party-report/index.mdx b/contents/articles/2024/12-21_kick-off-party-report/index.md
similarity index 90%
rename from contents/articles/2024/12-21_kick-off-party-report/index.mdx
rename to contents/articles/2024/12-21_kick-off-party-report/index.md
index 19987d17..1e91e785 100644
--- a/contents/articles/2024/12-21_kick-off-party-report/index.mdx
+++ b/contents/articles/2024/12-21_kick-off-party-report/index.md
@@ -3,10 +3,11 @@ title: 2024 年度プロジェクト発足会を行いました
 date: 2024-12-22T22:00:00+09:00
 categories:
   - events
-image: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
+  fit: contain
+  bg: "#00693E"
 author: snakamura
-fit: contain
-bg_color: "#00693E"
 ---
 
 ut.code(); では 2024 年 12 月 21 日にプロジェクト発足会を行いました。
diff --git a/contents/articles/2024/12-21_kick-off-party-report/image.jpg b/contents/articles/2024/12-21_kick-off-party-report/thumbnail.jpg
similarity index 100%
rename from contents/articles/2024/12-21_kick-off-party-report/image.jpg
rename to contents/articles/2024/12-21_kick-off-party-report/thumbnail.jpg
diff --git a/contents/articles/2024/12-23_teiyukai-event/image1.jpg b/contents/articles/2024/12-23_teiyukai-event/image1.jpg
index 5c4338ce..ee5ee230 100644
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deleted file mode 100644
index ee5ee230..00000000
Binary files a/contents/articles/2024/12-23_teiyukai-event/image2.jpg and /dev/null differ
diff --git a/contents/articles/2024/12-23_teiyukai-event/index.mdx b/contents/articles/2024/12-23_teiyukai-event/index.md
similarity index 95%
rename from contents/articles/2024/12-23_teiyukai-event/index.mdx
rename to contents/articles/2024/12-23_teiyukai-event/index.md
index 29c02c62..d816a139 100644
--- a/contents/articles/2024/12-23_teiyukai-event/index.mdx
+++ b/contents/articles/2024/12-23_teiyukai-event/index.md
@@ -3,7 +3,8 @@ title: 丁友会のイベントに参加しました
 date: 2024-12-22T20:00:00+09:00
 categories:
   - events
-image: ./image1.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: rtakanaka
 ---
 
@@ -19,4 +20,4 @@ ut.code(); は、2024 年 12 月 23 日に行われた「 【2024】小中学生
 
 改めまして、ご来場ありがとうございました。よろしければ、来年の第 98 回五月祭でまたお会いしましょう。
 
-![朝9時の様子](./image2.jpg)
+![朝9時の様子](./image1.jpg)
diff --git a/contents/articles/2024/12-23_teiyukai-event/thumbnail.jpg b/contents/articles/2024/12-23_teiyukai-event/thumbnail.jpg
new file mode 100644
index 00000000..5c4338ce
Binary files /dev/null and b/contents/articles/2024/12-23_teiyukai-event/thumbnail.jpg differ
diff --git a/contents/articles/2025/02-16_utcode-assembly-2/index.mdx b/contents/articles/2025/02-16_utcode-assembly-2/index.md
similarity index 95%
rename from contents/articles/2025/02-16_utcode-assembly-2/index.mdx
rename to contents/articles/2025/02-16_utcode-assembly-2/index.md
index ffe3cbb8..78627de9 100644
--- a/contents/articles/2025/02-16_utcode-assembly-2/index.mdx
+++ b/contents/articles/2025/02-16_utcode-assembly-2/index.md
@@ -3,7 +3,8 @@ title: 第 2 回 ut.code(); 総会を開催しました
 date: 2025-02-16T20:00:00+09:00
 categories:
   - events
-image: ./image1.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 author: snakamura
 ---
 
diff --git a/contents/articles/2025/02-16_utcode-assembly-2/image1.jpg b/contents/articles/2025/02-16_utcode-assembly-2/thumbnail.jpg
similarity index 100%
rename from contents/articles/2025/02-16_utcode-assembly-2/image1.jpg
rename to contents/articles/2025/02-16_utcode-assembly-2/thumbnail.jpg
diff --git a/contents/articles/2025/02-20_spring-camp/index.md b/contents/articles/2025/02-20_spring-camp/index.md
index cfd5a188..ab09ba2c 100644
--- a/contents/articles/2025/02-20_spring-camp/index.md
+++ b/contents/articles/2025/02-20_spring-camp/index.md
@@ -1,7 +1,8 @@
 ---
 title: 2025 年度春合宿を開催しました
 date: 2025-03-01
-image: ./image.avif
+thumbnail:
+  src: ./thumbnail.avif
 author: "tyasumura"
 ---
 
diff --git a/contents/articles/2025/02-20_spring-camp/image.avif b/contents/articles/2025/02-20_spring-camp/thumbnail.avif
similarity index 100%
rename from contents/articles/2025/02-20_spring-camp/image.avif
rename to contents/articles/2025/02-20_spring-camp/thumbnail.avif
diff --git a/contents/articles/2025/03-24_joint-welcome-session/index.md b/contents/articles/2025/03-24_joint-welcome-session/index.md
index ad0f890e..7ad1a3c2 100644
--- a/contents/articles/2025/03-24_joint-welcome-session/index.md
+++ b/contents/articles/2025/03-24_joint-welcome-session/index.md
@@ -1,12 +1,13 @@
 ---
 title: 東大エンジニア系サークル合同新歓を開催します
-image: ./thumbnail.png
 categories:
   - event
 author: ykobayashi
 date: 2025-03-24
-fit: contain
-bg_color: "#A5FFD3"
+thumbnail:
+  src: ./thumbnail.png
+  fit: contain
+  bg: "#A5FFD3"
 ---
 
 ## 📌 イベント概要
diff --git a/contents/articles/2025/05-12_new-member-camp/index.md b/contents/articles/2025/05-12_new-member-camp/index.md
index 4532eb38..b9634008 100644
--- a/contents/articles/2025/05-12_new-member-camp/index.md
+++ b/contents/articles/2025/05-12_new-member-camp/index.md
@@ -1,7 +1,8 @@
 ---
 title: 2025 年度新歓合宿を開催しました
 date: 2025-05-12
-image: ./thumbnail.avif
+thumbnail:
+  src: ./thumbnail.avif
 author: "kshibayama"
 ---
 
diff --git a/contents/articles/2025/05-12_new-member-camp/index.mdx b/contents/articles/2025/05-12_new-member-camp/index.mdx
index 4532eb38..b9634008 100644
--- a/contents/articles/2025/05-12_new-member-camp/index.mdx
+++ b/contents/articles/2025/05-12_new-member-camp/index.mdx
@@ -1,7 +1,8 @@
 ---
 title: 2025 年度新歓合宿を開催しました
 date: 2025-05-12
-image: ./thumbnail.avif
+thumbnail:
+  src: ./thumbnail.avif
 author: "kshibayama"
 ---
 
diff --git a/contents/articles/2025/05-13_newcomers-hackathon/index.md b/contents/articles/2025/05-13_newcomers-hackathon/index.md
index f4832ffa..626fa60d 100644
--- a/contents/articles/2025/05-13_newcomers-hackathon/index.md
+++ b/contents/articles/2025/05-13_newcomers-hackathon/index.md
@@ -3,7 +3,8 @@ title: ut.code(); 新歓ハッカソンを実施しました
 date: 2025-05-11 20:00:00+09:00
 author: ykobayashi
 
-image: ./thumbnail.jpeg
+thumbnail:
+  src: ./thumbnail.jpeg
 ---
 
 ut.code(); は、2024年5月10日（金）、5月11日（土）の二日間にわたり、新歓個人開発会を開催しました。
diff --git a/contents/projects/coursemate/index.md b/contents/projects/coursemate/index.md
index 507652f6..87994443 100644
--- a/contents/projects/coursemate/index.md
+++ b/contents/projects/coursemate/index.md
@@ -3,7 +3,7 @@ title: CourseMate
 kind: long-term
 status: released
 date: 2025-05-14
-image:
+thumbnail:
   src: ./thumbnail.png
 description: 同じ授業の友達をつくろう
 tags: [TypeScript, React]
diff --git a/contents/projects/create-cpu/index.md b/contents/projects/create-cpu/index.md
index cb259d75..0d71e2c7 100644
--- a/contents/projects/create-cpu/index.md
+++ b/contents/projects/create-cpu/index.md
@@ -3,7 +3,7 @@ title: CreateCPU
 kind: long-term
 status: released
 date: 2023-04-01
-image:
+thumbnail:
   src: ./thumbnail.png
 description: 現代コンピュータの頭脳である CPU は、単純な論理回路を大量に組み合わせた巨大なシステムです。CreateCPU を使うと、最も単純な回路素子をつなぎ合わせて自分だけの CPU を作り上げることができます。
 tags: [TypeScript, React]
diff --git a/contents/projects/dot-tutor-learn/index.md b/contents/projects/dot-tutor-learn/index.md
index 17470830..b1bb1407 100644
--- a/contents/projects/dot-tutor-learn/index.md
+++ b/contents/projects/dot-tutor-learn/index.md
@@ -2,7 +2,7 @@
 title: Dot Tutor Learn
 kind: long-term
 status: stable
-image:
+thumbnail:
   src: ./thumbnail.png
   fit: contain
 date: 2023-01-28
diff --git a/contents/projects/dot-tutor-translate/index.md b/contents/projects/dot-tutor-translate/index.md
index b5dec452..ed0ea645 100644
--- a/contents/projects/dot-tutor-translate/index.md
+++ b/contents/projects/dot-tutor-translate/index.md
@@ -2,7 +2,7 @@
 title: Dot Tutor Translate
 kind: long-term
 status: stable
-image:
+thumbnail:
   src: ./thumbnail.png
   fit: contain
 date: 2023-01-28
diff --git a/contents/projects/dull-meshi/index.md b/contents/projects/dull-meshi/index.md
index a269b20e..1173298a 100644
--- a/contents/projects/dull-meshi/index.md
+++ b/contents/projects/dull-meshi/index.md
@@ -2,7 +2,7 @@
 title: だるめし
 kind: long-term
 status: stable
-image:
+thumbnail:
   src: ./thumbnail.jpg
   fit: contain
   bg: "#E6E0DB"
diff --git a/contents/projects/extralearn/index.md b/contents/projects/extralearn/index.md
index 92fca8e1..86171ca1 100644
--- a/contents/projects/extralearn/index.md
+++ b/contents/projects/extralearn/index.md
@@ -7,7 +7,7 @@ members:
   - ykobayashi
   - rtakanaka
 leader: ykobayashi
-image:
+thumbnail:
   src: ./thumbnail.png
 github: https://github.com/ut-code/extralearn
 website: https://extra.utcode.net
diff --git a/contents/projects/hackathon/2023-08-17/call-paper.md b/contents/projects/hackathon/2023-08-17/call-paper.md
index c55438c5..4f6e5ad4 100644
--- a/contents/projects/hackathon/2023-08-17/call-paper.md
+++ b/contents/projects/hackathon/2023-08-17/call-paper.md
@@ -4,7 +4,7 @@ date: 2023-08-17
 kind: hackathon
 status: finished
 
-image:
+thumbnail:
   src: ./call-paper.png
   position: left
 
diff --git a/contents/projects/hackathon/2023-08-17/denigma.md b/contents/projects/hackathon/2023-08-17/denigma.md
index 8d73336f..e0457d01 100644
--- a/contents/projects/hackathon/2023-08-17/denigma.md
+++ b/contents/projects/hackathon/2023-08-17/denigma.md
@@ -3,7 +3,7 @@ title: Denigma
 date: 2023-08-17
 kind: hackathon
 status: dead
-image:
+thumbnail:
   src: ./denigma.png
   position: left
 
diff --git a/contents/projects/hackathon/2023-08-17/music-app.md b/contents/projects/hackathon/2023-08-17/music-app.md
index 42f43e4c..67c46f3f 100644
--- a/contents/projects/hackathon/2023-08-17/music-app.md
+++ b/contents/projects/hackathon/2023-08-17/music-app.md
@@ -3,7 +3,7 @@ title: music-app
 date: 2023-08-17
 kind: hackathon
 status: finished
-image:
+thumbnail:
   src: ./music-app.png
   position: top
   fit: contain
diff --git a/contents/projects/hackathon/2023-08-17/todo.md b/contents/projects/hackathon/2023-08-17/todo.md
index 62d626a1..5364e904 100644
--- a/contents/projects/hackathon/2023-08-17/todo.md
+++ b/contents/projects/hackathon/2023-08-17/todo.md
@@ -3,7 +3,7 @@ title: todoアプリ
 date: 2023-08-17
 kind: hackathon
 status: finished
-image:
+thumbnail:
   src: ./todo.png
 description: ToDoを管理できる Web アプリ
 github: https://github.com/ut-code/todo-2023-hackathon
diff --git a/contents/projects/hackathon/2024-06-08/bowling.md b/contents/projects/hackathon/2024-06-08/bowling.md
index 92210136..57652e9d 100644
--- a/contents/projects/hackathon/2024-06-08/bowling.md
+++ b/contents/projects/hackathon/2024-06-08/bowling.md
@@ -4,7 +4,7 @@ kind: hackathon
 status: finished
 date: 2024-06-08
 description: 障害物を避けてピンを倒そう！ どこか懐かしくてどこか新感覚のボウリングゲームをお楽しみあれ！
-image:
+thumbnail:
   src: ./bowling.png
 website: https://ut-code.github.io/bowling-app/
 github: https://github.com/ut-code/bowling-app
diff --git a/contents/projects/hackathon/2024-06-08/shift-syncer.md b/contents/projects/hackathon/2024-06-08/shift-syncer.md
index df63bf97..56bc0a8a 100644
--- a/contents/projects/hackathon/2024-06-08/shift-syncer.md
+++ b/contents/projects/hackathon/2024-06-08/shift-syncer.md
@@ -4,7 +4,7 @@ kind: hackathon
 status: finished
 date: 2024-06-08
 description: 複数人から登録されたシフトの希望を基に、最適なシフトを作成するアプリです。
-image:
+thumbnail:
   src: ./shift-syncer.png
 github: https://github.com/ut-code/ShiftSyncer
 ---
diff --git a/contents/projects/hackathon/2024-06-08/typing-script.md b/contents/projects/hackathon/2024-06-08/typing-script.md
index 3ca27cfc..f3935686 100644
--- a/contents/projects/hackathon/2024-06-08/typing-script.md
+++ b/contents/projects/hackathon/2024-06-08/typing-script.md
@@ -4,7 +4,7 @@ kind: hackathon
 status: finished
 date: 2024-06-08
 description: ソースコードに特化したタイピング練習サイトです。
-image:
+thumbnail:
   src: ./typing-script.png
   fit: contain
   bg: white
diff --git a/contents/projects/hackathon/2025-02-08/tower-battle/index.md b/contents/projects/hackathon/2025-02-08/tower-battle/index.md
index 4dcf1474..f7091077 100644
--- a/contents/projects/hackathon/2025-02-08/tower-battle/index.md
+++ b/contents/projects/hackathon/2025-02-08/tower-battle/index.md
@@ -3,7 +3,7 @@ title: Tower Battle
 date: 2025-02-08
 kind: hackathon
 status: stable
-image:
+thumbnail:
   src: ./thumbnail.png
 description: "簡単なタワーディフェンスゲームです。自機も移動して攻撃すると言う特徴があります。"
 members:
diff --git a/contents/projects/hackathon/2025-02-22/gemmit.md b/contents/projects/hackathon/2025-02-22/gemmit.md
index 13cfd308..ce89d3d8 100644
--- a/contents/projects/hackathon/2025-02-22/gemmit.md
+++ b/contents/projects/hackathon/2025-02-22/gemmit.md
@@ -4,7 +4,7 @@ kind: hackathon
 date: 2025-02-22
 status: released
 description: "Git の差分から Gemini がコミットメッセージを考えてくれるツール"
-image:
+thumbnail:
   src: ./gemmit.png
   position: top
   bg: white
diff --git a/contents/projects/hackathon/hackathon-template.md_ b/contents/projects/hackathon/hackathon-template.md_
index dc9921e3..409dedef 100644
--- a/contents/projects/hackathon/hackathon-template.md_
+++ b/contents/projects/hackathon/hackathon-template.md_
@@ -3,7 +3,7 @@ title: Title
 date: hackathon-start-date
 kind: hackathon
 status: finished
-image:
+thumbnail:
   src: ./thumbnail.png
 description: "簡単なタワーディフェンスゲームです。自機も移動して攻撃すると言う特徴があります。"
 github: https://github.com/ut-code/your-project
diff --git a/contents/projects/how-match/index.md b/contents/projects/how-match/index.md
index f91a0f02..46391a58 100644
--- a/contents/projects/how-match/index.md
+++ b/contents/projects/how-match/index.md
@@ -5,7 +5,7 @@ description: マッチング理論を用いた、担当振り分けアプリで
 date: 2025-01-01
 members: [ykobayashi, snakamura, kshibayama, tyasumura]
 leader: ykobayashi
-image:
+thumbnail:
   src: ./thumbnail.png
   fit: cover
   bg: white
diff --git a/contents/projects/itsuhima/index.md b/contents/projects/itsuhima/index.md
index e5ae075b..4f2b1eab 100644
--- a/contents/projects/itsuhima/index.md
+++ b/contents/projects/itsuhima/index.md
@@ -3,7 +3,7 @@ title: イツヒマ
 kind: long-term
 status: released
 date: 2025-05-14
-image:
+thumbnail:
   src: ./thumbnail.png
 
 description: "いつ暇？で日程調整できるアプリ"
diff --git a/contents/projects/nikochan/index.md b/contents/projects/nikochan/index.md
index 4e7c7e6f..3d76ed9e 100644
--- a/contents/projects/nikochan/index.md
+++ b/contents/projects/nikochan/index.md
@@ -2,7 +2,7 @@
 title: Falling Nikochan
 kind: long-term
 status: released
-image:
+thumbnail:
   src: ./thumbnail.jpg
 date: 2024-09-24
 description: シンプルでかわいい音ゲーです。誰でも譜面を作ってシェアできます。
diff --git a/contents/projects/syllabus/index.md b/contents/projects/syllabus/index.md
index eec50050..f9baee39 100644
--- a/contents/projects/syllabus/index.md
+++ b/contents/projects/syllabus/index.md
@@ -3,7 +3,7 @@ title: シ楽バス
 order: 3
 kind: long-term
 status: stable
-image:
+thumbnail:
   src: ./thumbnail.jpg
 date: 2023-10-02
 description: 前期課程に特化した時間割サービス
diff --git a/contents/projects/touhoubeat/index.md b/contents/projects/touhoubeat/index.md
index ec8b0251..e0460d61 100644
--- a/contents/projects/touhoubeat/index.md
+++ b/contents/projects/touhoubeat/index.md
@@ -2,7 +2,7 @@
 title: 東方競争曲
 kind: long-term
 status: stable
-image:
+thumbnail:
   src: ./thumbnail.png
 date: 2023-12-19
 description: 東方Projectのアレンジ曲で遊べるリズムゲーム
diff --git a/contents/projects/ut-bridge/index.md b/contents/projects/ut-bridge/index.md
index ca898ca9..5fad09ce 100644
--- a/contents/projects/ut-bridge/index.md
+++ b/contents/projects/ut-bridge/index.md
@@ -4,7 +4,7 @@ kind: long-term
 status: released
 order: 2
 date: 2025-04-01
-image:
+thumbnail:
   src: ./thumbnail.png
 
 description: "同じキャンパスにいる留学生と手軽に交流できるアプリです。従来の言語交換プログラムとは異なり、面倒な手続きなしで、気軽に国際交流を楽しめます。"
diff --git a/contents/projects/utcode-learn/index.mdx b/contents/projects/utcode-learn/index.md
similarity index 98%
rename from contents/projects/utcode-learn/index.mdx
rename to contents/projects/utcode-learn/index.md
index 8868900d..4e886d17 100644
--- a/contents/projects/utcode-learn/index.mdx
+++ b/contents/projects/utcode-learn/index.md
@@ -3,8 +3,8 @@ title: ut.code(); Learn
 kind: long-term
 status: stable
 order: 1
-image:
-  src: ./image.jpg
+thumbnail:
+  src: ./thumbnail.jpg
 date: 2022-04-01
 description: ut.code(); 公式の学習カリキュラムです。ut.code(); 外部の方でもご利用いただけます。
 tags: [JavaScript, TypeScript, React, Node.js, Docusaurus]
diff --git a/contents/projects/utcode-learn/image.jpg b/contents/projects/utcode-learn/thumbnail.jpg
similarity index 100%
rename from contents/projects/utcode-learn/image.jpg
rename to contents/projects/utcode-learn/thumbnail.jpg
diff --git a/contents/projects/webcface/index.md b/contents/projects/webcface/index.md
index 3f6aa406..e24c8640 100644
--- a/contents/projects/webcface/index.md
+++ b/contents/projects/webcface/index.md
@@ -2,7 +2,7 @@
 title: WebCFace
 kind: long-term
 status: stable
-image:
+thumbnail:
   src: ./thumbnail.png
 date: 2023-09-28
 description: プロセス間通信 & GUIを提供するライブラリ
diff --git a/docs/contents/article.md b/docs/contents/article.md
index d7c44b83..f5783ce5 100644
--- a/docs/contents/article.md
+++ b/docs/contents/article.md
@@ -1,4 +1,3 @@
-
 # 記事ページ
 
 ## frontmatter
@@ -6,35 +5,42 @@
 ### base
 
 - title: string
+
   - 記事タイトル。
 
 - date: Date
+
   - **記事を書いた**日。
   - フォーマット:
     - yyyy-MM-dd (日付のみ)
     - yyyy-MM-dd hh:mm:ss+09:00 (日付+時間)
 
 - author: string & keyof Member
+
   - 著者。
 
-- categories: string[]
+- categories?: string[]
   - 何なんだろうね。
 
 ### image 系
 
-- image: path
+- thumbnail.src: path
+
   - タイトル画像。記事一覧とトップで使うよ。
   - 縦横比 3:5 に crop されるよ。
 
-- fit?: "cover" | "contain" | fill" | "none" = "cover"
+- thumbnail.fit?: "cover" | "contain" | fill" | "none" = "cover"
+
   - `object-fit`
   - Astro のビルド段階で Sharp に渡されるよ。
   - <https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit>
 
-- position?: "center" | "left" | "right" | "top" | "bottom"
+- thumbnail.position?: "center" | "left" | "right" | "top" | "bottom"
+
   - `object-position`
   - Astro のビルド段階で Sharp に渡されるよ。
 
-- bg_color?: string
+- thumbnail.bg?: string
   - ロード中や画像の漏れたところに見せる背景色。
   - 設定しないと DaisyUI の `skeleton` を使うよ。
+  - `fit` が `contain` の場合は、必須のプロパティだよ。
diff --git a/docs/contents/members.md b/docs/contents/members.md
index bb6cf277..b22b9a08 100644
--- a/docs/contents/members.md
+++ b/docs/contents/members.md
@@ -1,4 +1,3 @@
-
 # メンバーページ
 
 [`[member].astro`](/src/pages/members/[member].astro) によってレンダリングされるメンバー詳細ページです。
@@ -7,15 +6,14 @@
 
 ## frontmatter
 
-| キー             | 必須 | 説明                                                                                                          |
-| ---------------- | ---- | ------------------------------------------------------------------------------------------------------------- |
-| `nameJa`         | ✅   | 名前。                                                                                                        |
-| `nameEn`         | ✅   | 英語名。                                                                                                      |
-| `joinYear`       | ✅   | ut.code(); に入会した年。ソートに使用しています。                                                           |
-| `description`    | ✅   | 今の自分を表す一言。                                                                                          |
-| `faceImage`      | ✅   | 顔写真。縦横比は 1:1。顔を中央に配置してください。                                                            |
-| `upperBodyImage` | ✅   | バストショット。縦横比は 1:1。顔が端になることは避けてください。                                              |
-| `github`         |      | GitHub の**アカウント名**                                                                                     |
-| `twitter`        |      | X (旧 Twitter) の **ID**。                                                                                    |
-| `website`        |      | 個人のウェブサイトの URL。                                                                                    |
-
+| キー             | 必須 | 説明                                                             |
+| ---------------- | ---- | ---------------------------------------------------------------- |
+| `nameJa`         | ✅   | 名前。                                                           |
+| `nameEn`         | ✅   | 英語名。                                                         |
+| `joinYear`       | ✅   | ut.code(); に入会した年。ソートに使用しています。                |
+| `description`    | ✅   | 今の自分を表す一言。                                             |
+| `faceImage`      | ✅   | 顔写真。縦横比は 1:1。顔を中央に配置してください。               |
+| `upperBodyImage` | ✅   | バストショット。縦横比は 1:1。顔が端になることは避けてください。 |
+| `github`         |      | GitHub の**アカウント名**                                        |
+| `twitter`        |      | X (旧 Twitter) の **ID**。                                       |
+| `website`        |      | 個人のウェブサイトの URL。                                       |
diff --git a/docs/contents/projects.md b/docs/contents/projects.md
index 85109d19..ff377dd7 100644
--- a/docs/contents/projects.md
+++ b/docs/contents/projects.md
@@ -10,22 +10,24 @@
 
 歴史的な経緯で長期プロジェクトは `contents/projects` 直下にありますが、学園祭プロジェクトとハッカソンは `contents/projects/{festival,hackathon}`にいれるようにしています。
 
+(NOTE: 学園祭プロジェクトはまだ数が収集できていないので表示していません)
+
 ## frontmatter
 
-| キー          | 必須 | 説明                                                                           |
-| ------------- | ---- | ------------------------------------------------------------------------------ |
-| `title`       | ✅   | プロジェクト名                                                                 |
-| `order`       |      | 表示順。指定されなかった場合は `date` 降順でソートされます。                   |
-| `date`        | ✅   | プロジェクトの開始日。現状ソートのみで利用しています。                         |
-| `image`       | ✅   | イメージ画像に関するデータ。                                                   |
-| `image.src`   | ✅   | イメージファイルへの markdown からの相対パス。                                 |
-| `image.fit`   |      | イメージのクロップ方法。 default = "cover"。                                   |
-| `image.bg`    |      | イメージの背景色。ロード中と `crop` = "contain" のときの背景に使われています。 |
-| `description` | ✅   | 短い説明。                                                                     |
-| `tags`        |      | 使用されている技術など。現状タグごとのフィルタリング機能等は提供していません。 |
-| `github`      |      | プロジェクトの GitHub 上での URL。                                             |
-| `youtube`     |      | プロジェクトの YouTube 上での URL。                                            |
-| `website`     |      | プロジェクトのウェブサイトの URL。                                             |
+| キー            | 必須 | 説明                                                                           |
+| --------------- | ---- | ------------------------------------------------------------------------------ |
+| `title`         | ✅   | プロジェクト名                                                                 |
+| `order`         |      | 表示順。指定されなかった場合は `date` 降順でソートされます。                   |
+| `date`          | ✅   | 記事の初回執筆日。ソートのみで利用しています。                                 |
+| `thumbnail`     | ✅   | イメージ画像に関するデータ。                                                   |
+| `thumbnail.src` | ✅   | イメージファイルへの markdown からの相対パス。                                 |
+| `thumbnail.fit` |      | イメージのクロップ方法。 default = "cover"。                                   |
+| `thumbnail.bg`  |      | イメージの背景色。ロード中と `crop` = "contain" のときの背景に使われています。 |
+| `description`   | ✅   | 短い説明。                                                                     |
+| `tags`          |      | 使用されている技術など。現状タグごとのフィルタリング機能等は提供していません。 |
+| `github`        |      | プロジェクトの GitHub 上での URL。                                             |
+| `youtube`       |      | プロジェクトの YouTube 上での URL。                                            |
+| `website`       |      | プロジェクトのウェブサイトの URL。                                             |
 
 ## body について
 
diff --git a/src/components/ArticleList.astro b/src/components/ArticleList.astro
index 6fd0a798..fffa1f04 100644
--- a/src/components/ArticleList.astro
+++ b/src/components/ArticleList.astro
@@ -56,8 +56,8 @@ const articlesWithExcerpts = await Promise.all(
       const imageWidth = baseW * (isFeatured ? 2 : 1);
       const imageHeight = baseW * (3 / 5) * (isFeatured ? 2 : 1);
 
-      article.data.fit ??= "cover";
-      article.data.position ??= "center";
+      article.data.thumbnail.fit ??= "cover";
+      article.data.thumbnail.position ??= "center";
 
       const additionalProps = isFeatured
         ? {
@@ -80,21 +80,21 @@ const articlesWithExcerpts = await Promise.all(
             <Picture
               loading={i < 5 ? loading : "lazy"}
               formats={["avif", "webp"]}
-              position={article.data.position}
+              position={article.data.thumbnail.position}
               width={imageWidth}
               height={imageHeight}
               alt=""
-              fit={article.data.fit}
-              src={article.data.image}
+              fit={article.data.thumbnail.fit}
+              src={article.data.thumbnail.src}
               class:list={[
                 "aspect-5/3 min-h-0 w-full rounded-xl",
-                !article.data["bg_color"] && "skeleton",
+                !article.data.thumbnail.bg && "skeleton",
               ]}
               style={{
-                "object-fit": article.data.fit,
-                ...(article.data.bg_color
+                "object-fit": article.data.thumbnail.fit,
+                ...(article.data.thumbnail.bg
                   ? {
-                      "background-color": article.data.bg_color,
+                      "background-color": article.data.thumbnail.bg,
                     }
                   : {}),
               }}
diff --git a/src/components/ProjectList.astro b/src/components/ProjectList.astro
index 0c502190..c85ef599 100644
--- a/src/components/ProjectList.astro
+++ b/src/components/ProjectList.astro
@@ -24,17 +24,17 @@ const { projects, variant = "full" } = props;
           <Picture
             loading={i < 6 && variant === "full" ? "eager" : "lazy"}
             alt="プロジェクトのイメージ画像"
-            src={project.data.image.src}
+            src={project.data.thumbnail.src}
             width="600"
             height={(600 * 3) / 5}
             class:list={[
               "aspect-5/3 w-full",
-              project.data.image.fit !== "contain" && "skeleton",
+              project.data.thumbnail.fit !== "contain" && "skeleton",
             ]}
             style={{
-              "object-fit": project.data.image.fit,
-              "object-position": project.data.image.position,
-              "background-color": project.data.image.bg,
+              "object-fit": project.data.thumbnail.fit,
+              "object-position": project.data.thumbnail.position,
+              "background-color": project.data.thumbnail.bg,
             }}
           />
           <div class="p-4">
diff --git a/src/pages/articles/[...id].astro b/src/pages/articles/[...id].astro
index 2160efe3..c1964d34 100644
--- a/src/pages/articles/[...id].astro
+++ b/src/pages/articles/[...id].astro
@@ -24,7 +24,7 @@ const author = article.data.author && (await getMember(article.data.author.id));
   title={article.data.title}
   description={null}
   focus={Focus.articles}
-  image={article.data.image}
+  image={article.data.thumbnail.src}
   type="article"
 >
   <div class="mt-2 text-center lg:px-8">
@@ -35,7 +35,9 @@ const author = article.data.author && (await getMember(article.data.author.id));
       formats={["avif", "webp"]}
       class="skeleton mx-auto rounded-none md:max-w-3xl md:rounded-2xl"
       alt="サムネイル"
-      src={article.data.image}
+      src={article.data.thumbnail.src}
+      position={article.data.thumbnail.position}
+      fit={article.data.thumbnail.fit}
     />
   </div>
   <div
diff --git a/src/pages/projects/[...id].astro b/src/pages/projects/[...id].astro
index 8abcd856..daac0c31 100644
--- a/src/pages/projects/[...id].astro
+++ b/src/pages/projects/[...id].astro
@@ -24,7 +24,7 @@ const { Content } = await render(project);
   title={project.data.title}
   description={project.data.description}
   focus={Focus.projects}
-  image={project.data.image.src}
+  image={project.data.thumbnail.src}
 >
   <main>
     <div
@@ -35,13 +35,13 @@ const { Content } = await render(project);
         formats={["avif", "webp"]}
         class="skeleton aspect-5/3 w-full object-cover lg:w-150 lg:rounded-2xl"
         alt="プロジェクト画像"
-        src={project.data.image.src}
-        position={project.data.image.position}
+        src={project.data.thumbnail.src}
+        position={project.data.thumbnail.position}
         width="1000"
         height="600"
         style={{
-          "object-position": project.data.image.position,
-          "object-fit": project.data.image.fit,
+          "object-position": project.data.thumbnail.position,
+          "object-fit": project.data.thumbnail.fit,
         }}
       />
       <div class="container mx-auto mt-8 px-4 lg:mx-0 lg:flex-1">
diff --git a/src/schema.ts b/src/schema.ts
index 319b424e..84e2ec38 100644
--- a/src/schema.ts
+++ b/src/schema.ts
@@ -7,6 +7,14 @@ export type Article = z.infer<ReturnType<typeof CreateArticleSchema>>;
 export type Member = z.infer<ReturnType<typeof CreateMemberSchema>>;
 export type Project = z.infer<ReturnType<typeof CreateProjectSchema>>;
 
+const Thumbnail = ({ image }: { image: ImageFunction }) =>
+  z.object({
+    src: image(),
+    position: Position.default("center"),
+    fit: Fit.default("cover"),
+    bg: z.string().optional(),
+  });
+
 const Position = z.enum(["center", "top", "bottom", "left", "right"]);
 const Fit = z.enum(["cover", "contain", "fill", "none"]);
 export const CreateArticleSchema = ({ image }: { image: ImageFunction }) =>
@@ -20,19 +28,17 @@ export const CreateArticleSchema = ({ image }: { image: ImageFunction }) =>
       author: reference("members").optional(),
       categories: z.array(z.string()).optional(),
       // 画像系
-      image: image(),
-      fit: Fit.optional(),
-      position: Position.default("center"),
-      bg_color: z.string().optional(),
+      thumbnail: Thumbnail({ image }),
     })
     .refine(
       (self) => {
-        const bad = self.fit === "contain" && self.bg_color === undefined;
+        const bad =
+          self.thumbnail.fit === "contain" && self.thumbnail.bg === undefined;
         return !bad;
       },
       {
         message: "fit: contain の場合、 bg_color を指定する必要があります",
-        path: ["bg_color"],
+        path: ["thumbnail", "bg"],
       },
     );
 
@@ -51,12 +57,7 @@ export const CreateProjectSchema = ({ image }: { image: ImageFunction }) =>
     ]),
     order: z.number().optional(),
     date: z.date(),
-    image: z.object({
-      src: image(),
-      position: Position.default("center"),
-      fit: Fit.default("cover"),
-      bg: z.string().optional().default("whitesmoke"),
-    }),
+    thumbnail: Thumbnail({ image }),
     description: z.string(),
     tags: z.array(z.string()).optional().default([]),
     github: z.string().url().optional(),