Second-brain 2.0: hybrid retrieval, obsidian bridge, vector watermark, tests

src/retriever.py

@@ -7,12 +7,10 @@ Phase 2: + Embedding + Fusion.
 from typing import List, Dict, Any, Optional
 from .engram import Engram
 from .store import EngramStore
-from .chroma_store import ChromaStore
-from .embedder import encode
 
 
 class Retriever:
-    def __init__(self, store: EngramStore, chroma: Optional[ChromaStore] = None):
+    def __init__(self, store: EngramStore, chroma: Optional[object] = None):
         self.store = store
         self.chroma = chroma
 
@@ -50,7 +48,6 @@ class Retriever:
         if not self.chroma:
             return []
         chroma_results = self.chroma.query(query, top_k=limit * 3)
-        eids = [r["id"] for r in chroma_results]
         results = []
         for r in chroma_results:
             eg = self.store.get(r["id"])