consolidate: Evo ChromaDB vector store wrapper

evo/chromadb_store.py

@@ -0,0 +1,32 @@
+"""
+Agent Q3 [Evo] — ChromaDB Store
+Persistent vector store. 384-dim nomic-embed-text embeddings.
+"""
+import chromadb, os
+
+CHROMA_PATH = os.getenv("CHROMA_PATH", "./chroma_data")
+
+class ChromaStore:
+    def __init__(self, collection: str = "agent_q3_evo"):
+        self.client     = chromadb.PersistentClient(path=CHROMA_PATH)
+        self.collection = self.client.get_or_create_collection(
+            name=collection,
+            metadata={"hnsw:space": "cosine"}
+        )
+
+    def add(self, ids: list, embeddings: list, documents: list, metadatas: list):
+        self.collection.add(ids=ids, embeddings=embeddings, documents=documents, metadatas=metadatas)
+
+    def query(self, embedding: list, n_results: int = 5) -> dict:
+        return self.collection.query(query_embeddings=[embedding], n_results=n_results)
+
+    def count(self) -> int:
+        return self.collection.count()
+
+    def export_jsonl(self, path: str):
+        import json
+        results = self.collection.get(include=["documents","metadatas"])
+        with open(path, "w") as f:
+            for doc, meta in zip(results["documents"], results["metadatas"]):
+                f.write(json.dumps({"text": doc, "meta": meta}) + "\n")
+        print(f"Exported {self.count()} docs to {path}")