From f2bed9284fccaec51dd78266f9113db41a9e966f Mon Sep 17 00:00:00 2001
From: bobo-xxx <111567133+bobo-xxx@users.noreply.github.com>
Date: Sat, 18 Apr 2026 12:41:12 +0800
Subject: [PATCH] fix(layers): clamp similarity to [0,1] to avoid negative
 values

---
 mempalace/layers.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mempalace/layers.py b/mempalace/layers.py
index b20c656..d549afe 100644
--- a/mempalace/layers.py
+++ b/mempalace/layers.py
@@ -287,7 +287,7 @@ class Layer3:
         for i, (doc, meta, dist) in enumerate(zip(docs, metas, dists), 1):
             meta = meta or {}
             doc = doc or ""
-            similarity = round(1 - dist, 3)
+            similarity = round(max(0.0, 1 - dist), 3)
             wing_name = meta.get("wing", "?")
             room_name = meta.get("room", "?")
             source = Path(meta.get("source_file", "")).name if meta.get("source_file") else ""