diff --git a/modules/story-summary/vector/retrieval/diffusion.js b/modules/story-summary/vector/retrieval/diffusion.js
index d963c08..ecd2693 100644
--- a/modules/story-summary/vector/retrieval/diffusion.js
+++ b/modules/story-summary/vector/retrieval/diffusion.js
@@ -61,7 +61,7 @@ const CONFIG = {
     HOW_MAX_GROUP_SIZE: 24,     // skip ultra-common action terms to avoid dense pair explosion
 
     // Post-verification (Cosine Gate)
-    COSINE_GATE: 0.48,      // min cosine(queryVector, stateVector)
+    COSINE_GATE: 0.46,      // min cosine(queryVector, stateVector)
     SCORE_FLOOR: 0.12,      // min finalScore = PPR_normalized × cosine
     DIFFUSION_CAP: 100,     // max diffused nodes (excluding seeds)
 };