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src/langbot/pkg/workflow/nodes/knowledge_retrieval.py

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+"""Knowledge Retrieval Node - search in knowledge base
+
+Node metadata is loaded from: ../../templates/metadata/nodes/knowledge_retrieval.yaml
+"""
+
+from __future__ import annotations
+
+from typing import Any, ClassVar
+
+from ..entities import ExecutionContext
+from ..node import WorkflowNode, workflow_node, NodePort, NodeConfig
+
+
+@workflow_node('knowledge_retrieval')
+class KnowledgeRetrievalNode(WorkflowNode):
+    """Knowledge retrieval node - search in knowledge base"""
+
+    type_name = "knowledge_retrieval"
+    category = "process"
+    icon = "📚"
+    name = "knowledge_retrieval"
+    description = "knowledge_retrieval"
+    name_zh = "知识库检索"
+    name_en = "Knowledge Retrieval"
+    description_zh = "从知识库中检索相关信息"
+    description_en = "Retrieve relevant information from knowledge bases"
+
+    inputs: ClassVar[list[NodePort]] = []
+    outputs: ClassVar[list[NodePort]] = []
+    config_schema: ClassVar[list[NodeConfig]] = []
+
+    async def execute(self, inputs: dict[str, Any], context: ExecutionContext) -> dict[str, Any]:
+        query = inputs.get("query", "")
+        return {"documents": [], "citations": [], "context": f"[Knowledge base search for: {query}]"}