add chunker.py

chunker.py

@@ -1,12 +1,26 @@
 """
 Chunking utilities for the RAG agent.
 
-Uses RecursiveCharacterTextSplitter from LangChain with a chunk size of 500 and an overlap of 100.
+Uses RecursiveCharacterTextSplitter from langchain-text-splitters with a chunk size of 500 and overlap of 100.
 """
+
 from langchain_text_splitters import RecursiveCharacterTextSplitter
 
 # Global splitter instance
-chunker = RecursiveCharacterTextSplitter(
-    chunk_size=500,
-    chunk_overlap=100,
-)
+splitter = RecursiveCharacterTextSplitter(chunk_size=500, chunk_overlap=100)
+
+
+def split_document(text: str):
+    """Split a document into chunks.
+
+    Parameters
+    ----------
+    text: str
+        Full text of the document.
+
+    Returns
+    -------
+    list[str]
+        List of chunk strings.
+    """
+    return splitter.split_text(text)