first add

tests/test_smoke.py

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+from typing import Optional
+from sqlmodel import SQLModel, Field
+
+from sqlmodel_pg_kit import create_all, Repository
+
+
+def test_smoke(tmp_path, monkeypatch):
+    # 用 SQLite 临时库跑一遍（替换 cfg 同步 URL）
+    from sqlmodel_pg_kit import db
+    from sqlmodel_pg_kit.db import get_session
+
+    class Hero(SQLModel, table=True):
+        id: Optional[int] = Field(default=None, primary_key=True)
+        name: str = Field(index=True)
+        age: Optional[int] = None
+
+    monkeypatch.setattr(db, "cfg", db.DatabaseConfig(
+        host="", port=0, user="", password="", database=":memory:", sslmode="disable"
+    ))
+    monkeypatch.setattr(db, "engine", db.create_engine("sqlite:///:memory:", echo=False))
+
+    create_all()
+    repo = Repository(Hero)
+    with get_session() as s:
+        repo.create(s, {"name": "Iron Man", "age": 45})
+        names = [h.name for h in repo.list(s)]
+        assert names == ["Iron Man"]