From 3cbbb6df6b28820c5da927b1ce3c18cb5be484e1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Jasi=C5=84ski?= <jasins.marek@gmail.com>
Date: Mon, 25 May 2026 11:31:19 +0200
Subject: [PATCH] fix(knowledge-service): resolve semantic cache collision by
 partitioning content hash by traceType and PromptVersion

---
 src/NexusReader.Infrastructure/Services/KnowledgeService.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/NexusReader.Infrastructure/Services/KnowledgeService.cs b/src/NexusReader.Infrastructure/Services/KnowledgeService.cs
index 6c63bfb..9b5ca3e 100644
--- a/src/NexusReader.Infrastructure/Services/KnowledgeService.cs
+++ b/src/NexusReader.Infrastructure/Services/KnowledgeService.cs
@@ -85,7 +85,8 @@ public class KnowledgeService : IKnowledgeService
 
         using var dbContext = await _dbContextFactory.CreateDbContextAsync(cancellationToken);
         var normalizedText = text.Trim();
-        var hash = ContentHasher.ComputeHash(normalizedText);
+        var hashInput = $"{normalizedText}:{traceType}:{PromptVersion}";
+        var hash = ContentHasher.ComputeHash(hashInput);
 
         // 1. Check Cache
         var cached = await dbContext.SemanticKnowledgeCache