Create semantic.py

semantic.py

@@ -10,23 +10,20 @@ except Exception:
 class SemanticIndex:
     def __init__(self):
         if not FAISS_AVAILABLE:
-            raise RuntimeError("FAISS unavailable")
-
+            raise RuntimeError("FAISS not installed")
         self.model = SentenceTransformer("all-MiniLM-L6-v2")
         self.index = None
         self.texts = []
 
     def build(self, texts):
-        embeddings = self.model.encode(texts)
-        dim = embeddings.shape[1]
-        self.index = faiss.IndexFlatL2(dim)
-        self.index.add(embeddings)
+        emb = self.model.encode(texts)
+        self.index = faiss.IndexFlatL2(emb.shape[1])
+        self.index.add(emb)
         self.texts = texts
 
     def search(self, query, k=5):
         if not self.index:
             return []
-
         q = self.model.encode([query])
         _, idxs = self.index.search(q, k)
         return [self.texts[i] for i in idxs[0]]