From 23c665515d4dd5084cb7862b9e770bcde8ac81e9 Mon Sep 17 00:00:00 2001
From: Woody <woody.ck.tse@gmail.com>
Date: Thu, 30 Apr 2026 13:59:03 +0800
Subject: [PATCH] fix: wrap filter chunks in XML tags for clearer LLM input

---
 backend/app/services/relevance_filter.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backend/app/services/relevance_filter.py b/backend/app/services/relevance_filter.py
index 2aacb8a..e9aec96 100644
--- a/backend/app/services/relevance_filter.py
+++ b/backend/app/services/relevance_filter.py
@@ -133,7 +133,7 @@ class RelevanceFilter:
         parts: List[str] = [intro]
         for idx, (sq, chunks) in enumerate(zip(sub_questions, sub_chunks)):
             formatted_chunks = "\n".join(
-                f"Chunk {c_idx}: {text}" for c_idx, (text, _meta) in enumerate(chunks)
+                f"<Chunk {c_idx}>\ncontent: {text}\n</Chunk {c_idx}>" for c_idx, (text, _meta) in enumerate(chunks)
             )
             parts.append(
                 section