diff --git a/.gitea/workflows/code-review.yml b/.gitea/workflows/code-review.yml
index 8426a4c..2c9fde3 100644
--- a/.gitea/workflows/code-review.yml
+++ b/.gitea/workflows/code-review.yml
@@ -1,4 +1,5 @@
 name: AI Code Review (on comment)
+
 on:
   issue_comment:
     types: [created, edited]
@@ -7,15 +8,49 @@ jobs:
   review:
     runs-on: ubuntu-latest
     if: github.event.issue.pull_request && (startsWith(github.event.comment.body, 'openai') || github.event.comment.body == 'openai')
+    env:
+      ACTIONS_STEP_DEBUG: 'true'
+      BASE: https://devstar.cn
+      GH_TOKEN: ${{ secrets.GH_TOKEN }}
+
     steps:
+      - name: Preflight - diff 接口可用性
+        run: |
+          set -e
+          echo "repo=${{ github.repository }}"
+          echo "issue.number=${{ github.event.issue.number }}"
+          curl -sSf -H "Authorization: token $GH_TOKEN" -H "Accept: application/vnd.github.diff" "$BASE/api/v1/repos/${{ github.repository }}/pulls/${{ github.event.issue.number }}.diff" >/dev/null
+          echo "diff endpoint OK"
+
+      - name: Preflight - 评论接口可用性
+        run: |
+          set -e
+          curl -sSf -X POST \
+            -H "Authorization: token $GH_TOKEN" \
+            -H "Content-Type: application/json" \
+            -d '{"body":"healthcheck from workflow"}' \
+            "$BASE/api/v1/repos/${{ github.repository }}/issues/${{ github.event.issue.number }}/comments" >/dev/null
+          echo "comment endpoint OK"
+
+      - name: Preflight - OpenAI 连接
+        env:
+          OPENAI_TOKEN: ${{ secrets.OPENAI_TOKEN }}
+          OPENAI_PROXY: https://api.zhizengzeng.com
+        run: |
+          set -e
+          curl -sS -i ${OPENAI_PROXY:+--proxy $OPENAI_PROXY} \
+            -H "Authorization: Bearer $OPENAI_TOKEN" \
+            https://api.openai.com/v1/models | head -n 1
+
       - name: OpenAI Code Review
         uses: ingress-it-solutions/gitea-code-review-action@v0.1
         env:
-          OPENAI_PROXY: https://api.zhizengzeng.com/v1
+          # 可直连则删除本行；需代理则改成你的代理地址
+          OPENAI_PROXY: https://api.zhizengzeng.com
         with:
           SOURCE_AT: gitea
           GITHUB_BASE_URL: https://devstar.cn
-          PROGRAMMING_LANGUAGE: 'JavaScript'
+          PROGRAMMING_LANGUAGE: 'JavaScript'   # 避免使用 auto
           FULL_REVIEW_COMMENT: openai
           REVIEW_COMMENT_PREFIX: 'openai:'
           MAX_CODE_LENGTH: 6000