Update: Bump actions/checkout from 4 to 7

.github/workflows/pr-base-guard.yml

@@ -10,7 +10,7 @@ jobs:
   guard:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - name: Check the branch this pull request came from
         # 宛先が既定ブランチでなければ、検査は行わずに成功で終わる。既定ブランチの名前は
         # ワークフローへ書かず、リポジトリの設定から受け取る

.github/workflows/pr-body-decisions.yml

@@ -20,7 +20,7 @@ jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - name: Compare the decisions section with the design documents
         # 番号とリポジトリ名は環境変数で渡す。ブランチ名と本文はシェルの本文へ埋めない。
         # 設計文書は head のコミットから、本文は Pull Request から API で読む。

.github/workflows/pytest.yml

@@ -27,7 +27,7 @@ jobs:
   pytest:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.x"

.github/workflows/runtime-plugin-authenticated-smoke.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     environment: runtime-smoke
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - name: Run authenticated runtime smoke
         env:
           ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}

.github/workflows/runtime-plugin-smoke.yml

@@ -25,7 +25,7 @@ jobs:
       matrix:
         runtime: [claude, codex, kiro, agy]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - name: Run unauthenticated runtime smoke
         run: bash scripts/runtime-smoke-test.sh --runtime "${{ matrix.runtime }}" --with-secrets=off
       - name: Upload smoke artifacts

.github/workflows/runtime-plugin-validate.yml

@@ -30,7 +30,7 @@ jobs:
   runtime-plugin-build-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-node@v4
         with:
           node-version: "22"
@@ -42,7 +42,7 @@ jobs:
   skill-frontmatter-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.x"
@@ -51,7 +51,7 @@ jobs:
   skill-repo-assumptions-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.x"
@@ -60,7 +60,7 @@ jobs:
   skill-shell-vars-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.x"
@@ -69,7 +69,7 @@ jobs:
   runtime-plugin-validate:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-node@v4
         with:
           node-version: "22"
@@ -82,7 +82,7 @@ jobs:
   markdown-link-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.x"
@@ -91,7 +91,7 @@ jobs:
   doc-line-limit-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.x"
@@ -100,7 +100,7 @@ jobs:
   instruction-files-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.x"