diff --git a/src/blackboard/queries.py b/src/blackboard/queries.py
index 8e6029c..e99dfc4 100644
--- a/src/blackboard/queries.py
+++ b/src/blackboard/queries.py
@@ -85,13 +85,17 @@ class Queries:
         finally:
             conn.close()
 
-    def pending_dispatchable(self) -> List[Task]:
+    def pending_dispatchable(self, card_id: Optional[str] = None) -> List[Task]:
         """查询可调度的 pending 任务（依赖已满足）"""
         conn = self._conn()
         try:
-            rows = conn.execute(
-                "SELECT * FROM tasks WHERE status='pending' ORDER BY priority ASC"
-            ).fetchall()
+            query = "SELECT * FROM tasks WHERE status='pending'"
+            params: list = []
+            if card_id:
+                query += " AND card_id=?"
+                params.append(card_id)
+            query += " ORDER BY priority ASC"
+            rows = conn.execute(query, params).fetchall()
             result = []
             for r in rows:
                 deps = json.loads(r["depends_on"] or "[]")