diff --git a/.gitea/workflows/pr-check.yaml b/.gitea/workflows/pr-check.yaml
index 0e66a5c..53262aa 100644
--- a/.gitea/workflows/pr-check.yaml
+++ b/.gitea/workflows/pr-check.yaml
@@ -42,7 +42,21 @@ jobs:
           git fetch --depth=1 origin "$COMMIT_SHA"
           git checkout -f "$COMMIT_SHA"
 
-      - name: 1. OpenAPI Contract Level Check
+      - name: 1. Commit Message Check
+        shell: sh
+        run: |
+          echo "Checking commit messages for [AC-...] or [TASK-...] (range: refs/remotes/origin/main..HEAD)"
+          # refs/remotes/origin/main is fetched in the checkout step
+          git log --no-merges --format=%B refs/remotes/origin/main..HEAD | cat
+          
+          if git log --no-merges --format=%B refs/remotes/origin/main..HEAD | grep -Eq '\[(AC|TASK)-'; then
+            echo "OK: Found [AC-...] or [TASK-...] in PR commits"
+          else
+            echo "ERROR: At least one commit message in the PR must contain [AC-...] or [TASK-...]"
+            exit 1
+          fi
+
+      - name: 2. OpenAPI Contract Level Check
         env:
           REQUIRE_PROVIDER_L2: "1"
         shell: sh
@@ -50,15 +64,15 @@ jobs:
           chmod +x scripts/*.sh
           ./scripts/check-openapi-level.sh
 
-      - name: 2. AC Traceability Check
+      - name: 3. AC Traceability Check
         shell: sh
         run: ./scripts/check-traceability.sh
 
-      - name: 3. OpenAPI Breaking Change Check
+      - name: 4. OpenAPI Breaking Change Check
         shell: sh
         run: ./scripts/check-openapi-diff.sh
 
-      - name: 4. Minimum Self-Test (mvn test)
+      - name: 5. Minimum Self-Test (mvn test)
         shell: sh
         run: |
           # 针对 Java Spring 项目运行最小单测 (方案 B: 不存在则提示跳过)