diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 856d2f71..f9cd3e55 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -2,16 +2,43 @@ Close #<IssueNumber>
 
 ## Self Check
 
-- [ ] I've confirmed `All checks have passed` on PR page. (You may leave this box unchecked due to long workflows.)
+- [ ] I've confirmed `All checks have passed` on this page. （このページで `All checks have passed` が表示されていることを確認した。）
+  - You may leave this box unchecked due to long workflows.
   - PR title follows [Angular's commit message format](https://github.com/angular/angular/blob/main/CONTRIBUTING.md#-commit-message-format).
     - PR title doesn't have `WIP:`.
   - All tests are passed.
     - Test command (e.g., `yarn test`) is passed.
     - Lint command (e.g., `yarn lint`) is passed.
-- [ ] I've reviewed my changes on PR's diff view.
+- [ ] I've reviewed my changes on GitHub PR's diff view. （GitHub上で自分の変更内容を確認した。）
+- [ ] I've written the steps to test. （テスト手順を記載した。）
+- [ ] I've added screenshots. （UIを変更した場合、スクリーンショットを追加した。）
+  - You may leave this box unchecked if you didn't modify the UI.
 
 <!-- Please add screenshots if you modify the UI.
 | Current                  | In coming                |
 | ------------------------ | ------------------------ |
 | <img src="" width="400"> | <img src="" width="400"> |
 -->
+
+## Steps to Test
+
+1. Open http://localhost-exercode.willbooster.net:3000/ja-JP/courses/_example/lessons/_example_a_plus_b/problems/_example_a_plus_b after login.
+2. Select the language `C`.
+3. Write the following code:
+
+   ```c
+   #include <stdio.h>
+
+   int main(void) {
+     int a, b;
+
+     scanf("%d %d", &a, &b);
+     printf("%d", a + b);
+     return 0;
+   }
+   ```
+
+4. Push `Submit` button.
+5. ...
+
+<!-- 日本語で記述しても大丈夫です。 -->
diff --git a/.husky/post-merge b/.husky/post-merge
index 6f9c95b9..3d5899f5 100755
--- a/.husky/post-merge
+++ b/.husky/post-merge
@@ -6,4 +6,7 @@ run_if_changed() {
   fi
 }
 
+run_if_changed "\..+-version" "awk '{print \$1}' .tool-versions | xargs -I{} asdf plugin add {}"
+run_if_changed "\..+-version" "asdf plugin update --all"
+run_if_changed "\..+-version" "asdf install"
 run_if_changed "package\.json" "yarn"
diff --git a/.lintstagedrc.cjs b/.lintstagedrc.cjs
index ec8bd4f1..e9aca4d8 100644
--- a/.lintstagedrc.cjs
+++ b/.lintstagedrc.cjs
@@ -10,4 +10,15 @@ module.exports = {
     }
     return commands;
   },
+  './**/migration.sql': (files) => {
+    for (const file of files) {
+      const content = fs.readFileSync(file, 'utf-8');
+      if (content.includes('Warnings:')) {
+        return [
+          `!!! Migration SQL file (${path.relative('', file)}) contains warnings !!! Solve the warnings and commit again.`,
+        ];
+      }
+    }
+    return [];
+  },
 };
diff --git a/packages/shared-lib-blitz-next/.lintstagedrc.cjs b/packages/shared-lib-blitz-next/.lintstagedrc.cjs
index d31f9e94..fd017d7f 100644
--- a/packages/shared-lib-blitz-next/.lintstagedrc.cjs
+++ b/packages/shared-lib-blitz-next/.lintstagedrc.cjs
@@ -19,4 +19,15 @@ module.exports = {
     }
     return commands;
   },
+  './**/migration.sql': (files) => {
+    for (const file of files) {
+      const content = fs.readFileSync(file, 'utf-8');
+      if (content.includes('Warnings:')) {
+        return [
+          `!!! Migration SQL file (${path.relative('', file)}) contains warnings !!! Solve the warnings and commit again.`,
+        ];
+      }
+    }
+    return [];
+  },
 };
diff --git a/packages/shared-lib-node/.lintstagedrc.cjs b/packages/shared-lib-node/.lintstagedrc.cjs
index d31f9e94..fd017d7f 100644
--- a/packages/shared-lib-node/.lintstagedrc.cjs
+++ b/packages/shared-lib-node/.lintstagedrc.cjs
@@ -19,4 +19,15 @@ module.exports = {
     }
     return commands;
   },
+  './**/migration.sql': (files) => {
+    for (const file of files) {
+      const content = fs.readFileSync(file, 'utf-8');
+      if (content.includes('Warnings:')) {
+        return [
+          `!!! Migration SQL file (${path.relative('', file)}) contains warnings !!! Solve the warnings and commit again.`,
+        ];
+      }
+    }
+    return [];
+  },
 };
diff --git a/packages/shared-lib-react/.lintstagedrc.cjs b/packages/shared-lib-react/.lintstagedrc.cjs
index 99ea336b..1105b5a5 100644
--- a/packages/shared-lib-react/.lintstagedrc.cjs
+++ b/packages/shared-lib-react/.lintstagedrc.cjs
@@ -19,4 +19,15 @@ module.exports = {
     }
     return commands;
   },
+  './**/migration.sql': (files) => {
+    for (const file of files) {
+      const content = fs.readFileSync(file, 'utf-8');
+      if (content.includes('Warnings:')) {
+        return [
+          `!!! Migration SQL file (${path.relative('', file)}) contains warnings !!! Solve the warnings and commit again.`,
+        ];
+      }
+    }
+    return [];
+  },
 };
diff --git a/packages/shared-lib/.lintstagedrc.cjs b/packages/shared-lib/.lintstagedrc.cjs
index d31f9e94..fd017d7f 100644
--- a/packages/shared-lib/.lintstagedrc.cjs
+++ b/packages/shared-lib/.lintstagedrc.cjs
@@ -19,4 +19,15 @@ module.exports = {
     }
     return commands;
   },
+  './**/migration.sql': (files) => {
+    for (const file of files) {
+      const content = fs.readFileSync(file, 'utf-8');
+      if (content.includes('Warnings:')) {
+        return [
+          `!!! Migration SQL file (${path.relative('', file)}) contains warnings !!! Solve the warnings and commit again.`,
+        ];
+      }
+    }
+    return [];
+  },
 };
diff --git a/packages/wb/.lintstagedrc.cjs b/packages/wb/.lintstagedrc.cjs
index d31f9e94..fd017d7f 100644
--- a/packages/wb/.lintstagedrc.cjs
+++ b/packages/wb/.lintstagedrc.cjs
@@ -19,4 +19,15 @@ module.exports = {
     }
     return commands;
   },
+  './**/migration.sql': (files) => {
+    for (const file of files) {
+      const content = fs.readFileSync(file, 'utf-8');
+      if (content.includes('Warnings:')) {
+        return [
+          `!!! Migration SQL file (${path.relative('', file)}) contains warnings !!! Solve the warnings and commit again.`,
+        ];
+      }
+    }
+    return [];
+  },
 };