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fix(langgraph): filter plain-text tool_call markers from model history #53

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fix(langgraph): filter plain-text tool_call markers from model history #53

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9 changes: 8 additions & 1 deletion ksadk/runners/langgraph_runner.py
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Original file line number Diff line number Diff line change
Expand Up @@ -378,6 +378,9 @@ def _to_state(self, payload: Dict[str, Any], history: list) -> Dict[str, Any]:
for msg in history:
role = msg.get("role")
content = msg.get("content", "")
# 跳过纯文本格式的 tool_call/tool_result，避免模型学到错误格式
if isinstance(content, str) and content.startswith(("[tool_call]", "[tool_result]", "[approval_request]", "[approval_response]")):
continue
if role == "user":
messages.append(HumanMessage(content=content))
elif role in ("assistant", "model"):
Expand Down Expand Up @@ -1239,9 +1242,13 @@ def latest_model_usage() -> dict[str, Any]:
yield {"type": "checkpoint", "metadata": metadata}

def _filter_tool_tags(self, content: str) -> str:
"""过滤 <tool_call> 标签"""
"""过滤 tool_call 标签（支持尖括号和方括号格式）"""
if not isinstance(content, str):
return content
# 过滤 <tool_call>...</tool_call>
content = re.sub(r"<tool_call>.*?</tool_call>", "", content, flags=re.DOTALL)
content = re.sub(r"</?(?:tool_call|arg_key|arg_value)>", "", content)
# 过滤 [tool_call]... 和 [tool_result]... 格式（整行或到下一个标记前）
content = re.sub(r"\[tool_call\]\[?.*?($|\[tool_result\]|\[approval)", "", content, flags=re.DOTALL)
content = re.sub(r"\[tool_result\]\[?.*?($|\[tool_call\]|\[approval)", "", content, flags=re.DOTALL)
return content