chore: Claude ワークフローの権限修正と旧ファイル削除

.github/workflows/claude-code-review.yml

@@ -12,16 +12,13 @@ on:
 
 jobs:
   claude-review:
-    # Optional: Filter by PR author
-    # if: |
-    #   github.event.pull_request.user.login == 'external-contributor' ||
-    #   github.event.pull_request.user.login == 'new-developer' ||
-    #   github.event.pull_request.author_association == 'FIRST_TIME_CONTRIBUTOR'
+    # fork からの PR では実行しない（secrets が渡らず失敗するため）
+    if: github.event.pull_request.head.repo.full_name == github.repository
 
     runs-on: ubuntu-latest
     permissions:
       contents: read
-      pull-requests: read
+      pull-requests: write # レビュー結果を PR にコメントするために必要
       issues: read
       id-token: write
 

.github/workflows/claude.yml

@@ -11,7 +11,9 @@ on:
     types: [submitted]
 
 jobs:
-  claude:
+  # @claude を書いた本人がこのリポジトリへの書込権限を持つかを先に確認する。
+  # claude ジョブは書込権限を持つため、第三者のコメントで起動させない。
+  authorize:
     if: |
       (github.event_name == 'issue_comment' && contains(github.event.comment.body, '@claude')) ||
       (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '@claude')) ||
@@ -20,10 +22,39 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: read
-      pull-requests: read
-      issues: read
+    outputs:
+      trusted: ${{ steps.permission.outputs.trusted }}
+    steps:
+      - name: Check actor repository permission
+        id: permission
+        env:
+          GH_TOKEN: ${{ github.token }}
+          REPOSITORY: ${{ github.repository }}
+          ACTOR: ${{ github.actor }}
+        run: |
+          set -euo pipefail
+
+          permission=$(gh api "repos/${REPOSITORY}/collaborators/${ACTOR}/permission" --jq '.permission' 2>/dev/null || echo none)
+
+          case "$permission" in
+            admin|maintain|write)
+              echo "trusted=true" >> "$GITHUB_OUTPUT"
+              ;;
+            *)
+              echo "trusted=false" >> "$GITHUB_OUTPUT"
+              ;;
+          esac
+
+  claude:
+    needs: authorize
+    if: needs.authorize.outputs.trusted == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write # ブランチ作成・push に必要
+      pull-requests: write # PR の作成・コメント投稿に必要
+      issues: write # Issue へのコメント投稿に必要
       id-token: write
-      actions: read # Required for Claude to read CI results on PRs
+      actions: read # PR の CI 結果を読むために必要
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4