test: blocked-check 同时扫描 body + comments 寻找阻塞引用 - Closes #47

- 新增 _get_blocking_refs() 辅助函数，同时扫描 Issue body 和 comments
- blocked_check() 和 _unblock_issues_blocked_by() 改用新函数
- 无阻塞引用但有 blocked 标签：视为残留标签自动移除
- 验证：成功解除 #18 的 blocked 标签（引用在 comments 中）

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

scripts/agent_poller.py

@@ -74,11 +74,34 @@ def list_issues(labels: list[str] | None = None):
     return issues
 
 
+def _get_blocking_refs(issue_num: int) -> set[int]:
+    """Extract all issue references from an issue body + comments.
+
+    Scans both the issue body and all comments for #N patterns,
+    returning a set of referenced issue numbers.
+    """
+    refs: set[int] = set()
+    # Body
+    issue = _req("GET", f"/issues/{issue_num}")
+    body = issue.get("body", "") or ""
+    refs.update(int(m.group(1)) for m in re.finditer(r'#(\d+)', body))
+    # Comments
+    try:
+        comments = _req("GET", f"/issues/{issue_num}/comments")
+        for c in comments:
+            cbody = c.get("body", "") or ""
+            refs.update(int(m.group(1)) for m in re.finditer(r'#(\d+)', cbody))
+    except SystemExit:
+        pass
+    return refs
+
+
 def blocked_check():
     """Check all blocked issues: if blocking issues are now closed, unblock.
 
-    Used by agents during polling to ensure blocked label doesn't persist
-    after blocking issues are resolved.
+    Scans issue body + comments for blocking references.
+    If no references found or all referenced issues are closed,
+    removes the 'blocked' label.
     """
     try:
         all_blocked = _req("GET", "/issues?state=open&labels=blocked")
@@ -92,13 +115,7 @@ def blocked_check():
 
     unblocked_count = 0
     for issue in all_blocked:
-        body = issue.get("body", "")
-        if not body:
-            continue
-
-        blocking_nums = {int(m.group(1)) for m in re.finditer(r'#(\d+)', body)}
-        if not blocking_nums:
-            continue
+        blocking_nums = _get_blocking_refs(issue["number"])
 
         all_resolved = True
         for blk in blocking_nums:
@@ -115,9 +132,9 @@ def blocked_check():
             new_label_names = [l for l in current_label_names if l != "blocked"]
             new_label_ids = _label_names_to_ids(new_label_names)
             _req("PUT", f"/issues/{issue['number']}/labels", {"labels": new_label_ids})
+            reason = "所有阻塞 Issue 均已关闭" if blocking_nums else "无阻塞引用，移除残留 blocked 标签"
             print(f"Unblocked #{issue['number']}: {issue['title']}")
-            comment_issue(issue["number"],
-                f"阻塞已解除：所有阻塞 Issue 均已关闭。")
+            comment_issue(issue["number"], f"阻塞已解除：{reason}。")
             unblocked_count += 1
 
     if unblocked_count == 0:
@@ -158,8 +175,8 @@ def close_issue(num, body=None):
 def _unblock_issues_blocked_by(closed_num):
     """Check issues blocked by *closed_num* and unblock if all blockers resolved.
 
-    Finds open issues with 'blocked' label whose body references *closed_num*
-    via a '阻塞: #N' pattern. If all referenced blocking issues are now closed,
+    Scans both body and comments for #N references. If *closed_num* appears
+    in any blocked issue and all referenced issues are now closed,
     removes the 'blocked' label and comments on the unblocked issue.
     """
     try:
@@ -170,12 +187,7 @@ def _unblock_issues_blocked_by(closed_num):
         return
 
     for issue in all_blocked:
-        body = issue.get("body", "")
-        if not body:
-            continue
-
-        # Extract all issue numbers from the body (e.g. #21, #40)
-        blocking_nums = {int(m.group(1)) for m in re.finditer(r'#(\d+)', body)}
+        blocking_nums = _get_blocking_refs(issue["number"])
         if closed_num not in blocking_nums:
             continue