From 18d75e754b1829b5a85bc0ce942b784893c5a788 Mon Sep 17 00:00:00 2001
From: goulustis <cnimaiv@gmail.com>
Date: Sat, 28 Feb 2026 10:49:07 +0800
Subject: [PATCH] add optional abstract class

---
 lang_agent/base.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lang_agent/base.py b/lang_agent/base.py
index 15ab10a..cffc9be 100644
--- a/lang_agent/base.py
+++ b/lang_agent/base.py
@@ -34,6 +34,14 @@ class GraphBase(ABC):
     workflow: CompiledStateGraph     # the main workflow
     streamable_tags: List[List[str]] # which llm to stream outputs; see routing.py for complex usage
     textreleaser_delay_keys: List[str] = (None, None)  # use to control when to start streaming; see routing.py for complex usage
+
+    def _build_modules(self):
+        # NOTE: optional abc
+        pass
+
+    def _build_graph(self):
+        # NOTE: optional abc
+        pass
     
     def _stream_result(self, *nargs, **kwargs):