GRM-51: fix: enforce conventional commit check in automated PR review

scripts/ci/pr_review.py

@@ -301,6 +301,50 @@ def check_test_coverage(files: list[dict[str, Any]], result: ReviewResult) -> No
         result.add_summary("- Tests: OK")
 
 
+def check_commit_conventions(client: GiteaClient, pr_number: str, result: ReviewResult) -> None:
+    """Check that PR commits follow conventional commit format.
+
+    Verifies that at least one commit on the PR branch matches the
+    conventional commit pattern (type: description). Merge commits
+    and revert commits are exempt.
+    """
+    try:
+        commits = client.get_pr_commits(pr_number)
+    except APIError as e:
+        result.add_summary(f"- Commit conventions: ERROR — could not fetch commits: {e.message}")
+        return
+
+    if not commits:
+        result.add_summary("- Commit conventions: OK (no commits to check)")
+        return
+
+    from gitea_runner_manager.config import CONVENTIONAL_RE
+
+    has_conventional = False
+    non_conventional: list[str] = []
+
+    for commit in commits:
+        commit_info = commit.get("commit", {})
+        message = str(commit_info.get("message", "") if isinstance(commit_info, dict) else "").split("\n")[0]
+        # Skip merge commits and revert commits
+        if message.startswith(("Merge", "Revert")):
+            continue
+        if CONVENTIONAL_RE.match(message):
+            has_conventional = True
+        else:
+            non_conventional.append(message[:60])
+
+    if has_conventional:
+        result.add_summary("- Commit conventions: OK")
+    elif non_conventional:
+        result.add_summary(
+            f"- Commit conventions: WARNING — no conventional commit found. "
+            f"Non-conventional commits: {', '.join(non_conventional[:3])}"
+        )
+    else:
+        result.add_summary("- Commit conventions: OK (all commits are merges/reverts)")
+
+
 def run_review(client: GiteaClient, pr_number: str) -> ReviewResult:
     """Run all review checks and return the result."""
     result = ReviewResult()
@@ -322,6 +366,7 @@ def run_review(client: GiteaClient, pr_number: str) -> ReviewResult:
     check_function_length(files, result)
     check_documentation(files, result)
     check_test_coverage(files, result)
+    check_commit_conventions(client, pr_number, result)
 
     return result