Add workflow for Claude to react to PR comments and reviews

.github/workflows/claude-pr-reactions.yml

@@ -0,0 +1,50 @@
+name: "Claude PR Reactions"
+
+on:
+  issue_comment:
+    types: [created]
+  pull_request_review:
+    types: [submitted]
+  pull_request_review_comment:
+    types: [created]
+
+permissions:
+  contents: write
+  pull-requests: write
+  issues: write
+  actions: read
+
+concurrency:
+  group: claude-pr-reactions-${{ github.event.pull_request.number || github.event.issue.number }}
+  cancel-in-progress: true
+
+jobs:
+  react:
+    name: "React to PR feedback"
+    runs-on: blacksmith-4vcpu-ubuntu-2404
+    timeout-minutes: 60
+
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.PHPSTAN_BOT_TOKEN }}
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: "8.4"
+          ini-file: development
+          extensions: mbstring
+
+      - uses: "ramsey/composer-install@v3"
+
+      - name: "React to feedback"
+        uses: anthropics/claude-code-action@v1
+        with:
+          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
+          github_token: ${{ secrets.PHPSTAN_BOT_TOKEN }}
+          trigger_phrase: "@phpstan-bot"
+          claude_args: "--model claude-opus-4-6 --max-turns 50"