feat(ci): add dual-model PR Agent for automated code review

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/pr-agent.yml

@@ -0,0 +1,58 @@
+name: PR Agent
+
+on:
+  pull_request:
+    types: [opened, reopened, ready_for_review, synchronize]
+  issue_comment:
+    types: [created]
+
+jobs:
+  review-claude:
+    if: >
+      github.event_name == 'pull_request' ||
+      (github.event_name == 'issue_comment' &&
+       startsWith(github.event.comment.body, '/'))
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+      contents: read
+    steps:
+      - name: PR Agent - Claude Opus 4.7
+        uses: the-pr-agent/pr-agent@main
+        env:
+          OPENAI.KEY: ${{ secrets.PR_REVIEW_API_KEY }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          config.model: "openai/claude-opus-4-7"
+          config.fallback_models: '["openai/claude-opus-4-6"]'
+          config.custom_model_max_tokens: 200000
+          openai.api_base: ${{ secrets.PR_REVIEW_BASE_URL }}
+          github_action_config.auto_review: "true"
+          github_action_config.auto_describe: "true"
+          github_action_config.auto_improve: "true"
+          github_action_config.pr_actions: '["opened", "reopened", "ready_for_review", "synchronize"]'
+
+  review-gpt:
+    if: >
+      github.event_name == 'pull_request' ||
+      (github.event_name == 'issue_comment' &&
+       startsWith(github.event.comment.body, '/'))
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+      contents: read
+    steps:
+      - name: PR Agent - GPT 5.5
+        uses: the-pr-agent/pr-agent@main
+        env:
+          OPENAI.KEY: ${{ secrets.PR_REVIEW_API_KEY }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          config.model: "openai/gpt-5.5"
+          config.fallback_models: '["openai/gpt-5.4-mini"]'
+          config.custom_model_max_tokens: 200000
+          openai.api_base: ${{ secrets.PR_REVIEW_BASE_URL }}
+          github_action_config.auto_review: "true"
+          github_action_config.auto_describe: "false"
+          github_action_config.auto_improve: "true"
+          github_action_config.pr_actions: '["opened", "reopened", "ready_for_review", "synchronize"]'

.pr_agent.toml

@@ -0,0 +1,28 @@
+[config]
+ai_timeout = 300
+temperature = 0.2
+
+[pr_reviewer]
+num_code_suggestions = 4
+inline_code_comments = true
+require_security_review = true
+extra_instructions = """
+This is a Next.js 16 / React 19 / TypeScript interactive visual novel engine.
+Focus on: logic errors, security vulnerabilities, missing error handling,
+type safety issues, and architectural violations.
+Do not comment on code style or formatting.
+"""
+
+[pr_description]
+generate_ai_title = true
+publish_labels = true
+use_bullet_points = true
+
+[ignore]
+glob = [
+    "pnpm-lock.yaml",
+    "*.generated.*",
+    "public/**",
+    "docs/**",
+    "*.md"
+]