diff --git a/open_notebook/domain/__init__.py b/open_notebook/domain/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/open_notebook/domain/base.py b/open_notebook/domain/base.py
new file mode 100644
index 0000000..da9b0ac
--- /dev/null
+++ b/open_notebook/domain/base.py
@@ -0,0 +1,147 @@
+from datetime import datetime
+from typing import Any, ClassVar, Dict, List, Optional, Type, TypeVar
+
+from loguru import logger
+from pydantic import BaseModel, ValidationError, field_validator
+
+from open_notebook.exceptions import (
+    DatabaseOperationError,
+    InvalidInputError,
+    NotFoundError,
+)
+from open_notebook.repository import (
+    repo_create,
+    repo_delete,
+    repo_query,
+    repo_relate,
+    repo_update,
+)
+
+T = TypeVar("T", bound="ObjectModel")
+
+
+class ObjectModel(BaseModel):
+    id: Optional[str] = None
+    table_name: ClassVar[str] = ""
+    created: Optional[datetime] = None
+    updated: Optional[datetime] = None
+
+    @classmethod
+    def get_all(cls: Type[T], order_by=None) -> List[T]:
+        try:
+            if order_by:
+                order = f" ORDER BY {order_by}"
+            else:
+                order = ""
+            result = repo_query(f"SELECT * FROM {cls.table_name} {order}")
+            objects = []
+            for obj in result:
+                try:
+                    objects.append(cls(**obj))
+                except Exception as e:
+                    logger.critical(f"Error creating object: {str(e)}")
+
+            return objects
+        except Exception as e:
+            logger.error(f"Error fetching all {cls.table_name}: {str(e)}")
+            logger.exception(e)
+            raise DatabaseOperationError(e)
+
+    @classmethod
+    def get(cls: Type[T], id: str) -> Optional[T]:
+        if not id:
+            raise InvalidInputError("ID cannot be empty")
+        try:
+            result = repo_query(f"SELECT * FROM {id}")
+            if result:
+                return cls(**result[0])
+            return None
+        except Exception as e:
+            logger.error(f"Error fetching {cls.table_name} with id {id}: {str(e)}")
+            logger.exception(e)
+            raise NotFoundError(f"{cls.table_name} with id {id} not found")
+
+    def needs_embedding(self) -> bool:
+        return False
+
+    def get_embedding_content(self) -> Optional[str]:
+        return None
+
+    def save(self) -> None:
+        from open_notebook.config import EMBEDDING_MODEL
+
+        try:
+            logger.debug(f"Validating {self.__class__.__name__}")
+            self.model_validate(self.model_dump(), strict=True)
+            data = self._prepare_save_data()
+            data["updated"] = datetime.now().isoformat()
+
+            if self.needs_embedding():
+                embedding_content = self.get_embedding_content()
+                if embedding_content:
+                    data["embedding"] = EMBEDDING_MODEL.embed(embedding_content)
+
+            if self.id is None:
+                data["created"] = datetime.now().isoformat()
+                logger.debug("Creating new record")
+                repo_result = repo_create(self.__class__.table_name, data)
+            else:
+                logger.debug(f"Updating record with id {self.id}")
+                repo_result = repo_update(self.id, data)
+
+            # Update the current instance with the result
+            for key, value in repo_result[0].items():
+                if hasattr(self, key):
+                    if isinstance(getattr(self, key), BaseModel):
+                        setattr(self, key, type(getattr(self, key))(**value))
+                    else:
+                        setattr(self, key, value)
+
+        except ValidationError as e:
+            logger.error(f"Validation failed: {e}")
+            raise
+        except Exception as e:
+            logger.error(f"Error saving record: {e}")
+            raise
+
+        except Exception as e:
+            logger.error(f"Error saving {self.__class__.table_name}: {str(e)}")
+            logger.exception(e)
+            raise DatabaseOperationError(e)
+
+    def _prepare_save_data(self) -> Dict[str, Any]:
+        data = self.model_dump()
+        # del data["created"]
+        # del data["updated"]
+        return {key: value for key, value in data.items() if value is not None}
+
+    def delete(self) -> bool:
+        if self.id is None:
+            raise InvalidInputError("Cannot delete object without an ID")
+        try:
+            logger.debug(f"Deleting record with id {self.id}")
+            return repo_delete(self.id)
+        except Exception as e:
+            logger.error(
+                f"Error deleting {self.__class__.table_name} with id {self.id}: {str(e)}"
+            )
+            raise DatabaseOperationError(
+                f"Failed to delete {self.__class__.table_name}"
+            )
+
+    def relate(self, relationship: str, target_id: str) -> Any:
+        if not relationship or not target_id or not self.id:
+            raise InvalidInputError("Relationship and target ID must be provided")
+        try:
+            return repo_relate(self.id, relationship, target_id)
+        except Exception as e:
+            logger.error(f"Error creating relationship: {str(e)}")
+            logger.exception(e)
+            raise DatabaseOperationError(e)
+
+    @field_validator("created", "updated", mode="before")
+    @classmethod
+    def parse_datetime(cls, value):
+        if isinstance(value, str):
+            return datetime.fromisoformat(value.replace("Z", "+00:00"))
+        return value
diff --git a/open_notebook/domain.py b/open_notebook/domain/notebook.py
similarity index 65%
rename from open_notebook/domain.py
rename to open_notebook/domain/notebook.py
index ef238eb..b917548 100644
--- a/open_notebook/domain.py
+++ b/open_notebook/domain/notebook.py
@@ -1,153 +1,23 @@
 import os
-from datetime import datetime
-from typing import Any, ClassVar, Dict, List, Literal, Optional, Type, TypeVar
+from typing import Any, ClassVar, Dict, List, Literal, Optional
 
 from langchain_core.runnables.config import RunnableConfig
 from loguru import logger
-from pydantic import BaseModel, Field, ValidationError, field_validator
+from pydantic import BaseModel, Field, field_validator
 
+from open_notebook.config import EMBEDDING_MODEL
+from open_notebook.domain.base import ObjectModel
 from open_notebook.exceptions import (
     DatabaseOperationError,
     InvalidInputError,
-    NotFoundError,
 )
 from open_notebook.graphs.multipattern import graph as pattern_graph
 from open_notebook.graphs.recursive_toc import graph as toc_graph
 from open_notebook.repository import (
     repo_create,
-    repo_delete,
     repo_query,
-    repo_relate,
-    repo_update,
 )
-from open_notebook.utils import get_embedding, split_text, surreal_clean
-
-T = TypeVar("T", bound="ObjectModel")
-
-
-class ObjectModel(BaseModel):
-    id: Optional[str] = None
-    table_name: ClassVar[str] = ""
-    created: Optional[datetime] = None
-    updated: Optional[datetime] = None
-
-    @classmethod
-    def get_all(cls: Type[T], order_by=None) -> List[T]:
-        try:
-            if order_by:
-                order = f" ORDER BY {order_by}"
-            else:
-                order = ""
-            result = repo_query(f"SELECT * FROM {cls.table_name} {order}")
-            objects = []
-            for obj in result:
-                try:
-                    objects.append(cls(**obj))
-                except Exception as e:
-                    logger.critical(f"Error creating object: {str(e)}")
-
-            return objects
-        except Exception as e:
-            logger.error(f"Error fetching all {cls.table_name}: {str(e)}")
-            logger.exception(e)
-            raise DatabaseOperationError(e)
-
-    @classmethod
-    def get(cls: Type[T], id: str) -> Optional[T]:
-        if not id:
-            raise InvalidInputError("ID cannot be empty")
-        try:
-            result = repo_query(f"SELECT * FROM {id}")
-            if result:
-                return cls(**result[0])
-            return None
-        except Exception as e:
-            logger.error(f"Error fetching {cls.table_name} with id {id}: {str(e)}")
-            logger.exception(e)
-            raise NotFoundError(f"{cls.table_name} with id {id} not found")
-
-    def needs_embedding(self) -> bool:
-        return False
-
-    def get_embedding_content(self) -> Optional[str]:
-        return None
-
-    def save(self) -> None:
-        try:
-            logger.debug(f"Validating {self.__class__.__name__}")
-            self.model_validate(self.model_dump(), strict=True)
-            data = self._prepare_save_data()
-            data["updated"] = datetime.now().isoformat()
-
-            if self.needs_embedding():
-                embedding_content = self.get_embedding_content()
-                if embedding_content:
-                    data["embedding"] = get_embedding(embedding_content)
-
-            if self.id is None:
-                data["created"] = datetime.now().isoformat()
-                logger.debug("Creating new record")
-                repo_result = repo_create(self.__class__.table_name, data)
-            else:
-                logger.debug(f"Updating record with id {self.id}")
-                repo_result = repo_update(self.id, data)
-
-            # Update the current instance with the result
-            for key, value in repo_result[0].items():
-                if hasattr(self, key):
-                    if isinstance(getattr(self, key), BaseModel):
-                        setattr(self, key, type(getattr(self, key))(**value))
-                    else:
-                        setattr(self, key, value)
-
-        except ValidationError as e:
-            logger.error(f"Validation failed: {e}")
-            raise
-        except Exception as e:
-            logger.error(f"Error saving record: {e}")
-            raise
-
-        except Exception as e:
-            logger.error(f"Error saving {self.__class__.table_name}: {str(e)}")
-            logger.exception(e)
-            raise DatabaseOperationError(e)
-
-    def _prepare_save_data(self) -> Dict[str, Any]:
-        data = self.model_dump()
-        # del data["created"]
-        # del data["updated"]
-        return {key: value for key, value in data.items() if value is not None}
-
-    def delete(self) -> bool:
-        if self.id is None:
-            raise InvalidInputError("Cannot delete object without an ID")
-        try:
-            logger.debug(f"Deleting record with id {self.id}")
-            return repo_delete(self.id)
-        except Exception as e:
-            logger.error(
-                f"Error deleting {self.__class__.table_name} with id {self.id}: {str(e)}"
-            )
-            raise DatabaseOperationError(
-                f"Failed to delete {self.__class__.table_name}"
-            )
-
-    def relate(self, relationship: str, target_id: str) -> Any:
-        if not relationship or not target_id or not self.id:
-            raise InvalidInputError("Relationship and target ID must be provided")
-        try:
-            return repo_relate(self.id, relationship, target_id)
-        except Exception as e:
-            logger.error(f"Error creating relationship: {str(e)}")
-            logger.exception(e)
-            raise DatabaseOperationError(e)
-
-    @field_validator("created", "updated", mode="before")
-    @classmethod
-    def parse_datetime(cls, value):
-        if isinstance(value, str):
-            return datetime.fromisoformat(value.replace("Z", "+00:00"))
-        return value
+from open_notebook.utils import split_text, surreal_clean
 
 
 class Notebook(ObjectModel):
@@ -288,7 +158,7 @@ class Source(ObjectModel):
                             "source": {self.id},
                             "order": {i},
                             "content": $content,
-                            "embedding": {get_embedding(chunk)},
+                            "embedding": {EMBEDDING_MODEL.embed(chunk)},
                     }};""",
                     {"content": surreal_clean(chunk)},
                 )
@@ -322,7 +192,7 @@ class Source(ObjectModel):
         if not insight_type or not content:
             raise InvalidInputError("Insight type and content must be provided")
         try:
-            embedding = get_embedding(content)
+            embedding = EMBEDDING_MODEL.embed(content)
             return repo_query(
                 f"""
                 CREATE source_insight CONTENT {{
@@ -396,9 +266,7 @@ class Note(ObjectModel):
         return self.content
 
 
-def text_search(
-    keyword: str, results: int, source: bool = True, note: bool = True
-) -> List[Dict[str, Any]]:
+def text_search(keyword: str, results: int, source: bool = True, note: bool = True):
     if not keyword:
         raise InvalidInputError("Search keyword cannot be empty")
     try:
@@ -415,9 +283,7 @@ def text_search(
         raise DatabaseOperationError("Failed to perform text search")
 
 
-def vector_search(
-    keyword: str, results: int, source: bool = True, note: bool = True
-) -> List[Dict[str, Any]]:
+def vector_search(keyword: str, results: int, source: bool = True, note: bool = True):
     if not keyword:
         raise InvalidInputError("Search keyword cannot be empty")
     try:
diff --git a/open_notebook/repository.py b/open_notebook/repository.py
index 2375387..ca6f47a 100644
--- a/open_notebook/repository.py
+++ b/open_notebook/repository.py
@@ -34,7 +34,7 @@ def repo_query(query_str: str, vars: Optional[Dict[str, Any]] = None):
             result = connection.query(query_str, vars)
             return result
         except Exception as e:
-            # logger.debug(f"Query: {query_str}, Variables: {vars}")
+            logger.critical(f"Query: {query_str}, Variables: {vars}")
             logger.exception(e)
             raise
 
diff --git a/pages/2_📒_Notebooks.py b/pages/2_📒_Notebooks.py
index 7d39d08..b6e5701 100644
--- a/pages/2_📒_Notebooks.py
+++ b/pages/2_📒_Notebooks.py
@@ -1,7 +1,7 @@
 import streamlit as st
 from humanize import naturaltime
 
-from open_notebook.domain import Notebook
+from open_notebook.domain.notebook import Notebook
 from stream_app.chat import chat_sidebar
 from stream_app.note import add_note, note_card
 from stream_app.source import add_source, source_card
diff --git a/pages/3_🔍_Search.py b/pages/3_🔍_Search.py
index bd10233..6c69ea2 100644
--- a/pages/3_🔍_Search.py
+++ b/pages/3_🔍_Search.py
@@ -1,6 +1,6 @@
 import streamlit as st
 
-from open_notebook.domain import text_search, vector_search
+from open_notebook.domain.notebook import text_search, vector_search
 from open_notebook.utils import get_embedding
 from stream_app.note import note_list_item
 from stream_app.source import source_list_item
diff --git a/stream_app/chat.py b/stream_app/chat.py
index 44936da..ae2e732 100644
--- a/stream_app/chat.py
+++ b/stream_app/chat.py
@@ -1,7 +1,7 @@
 import streamlit as st
 from langchain_core.runnables import RunnableConfig
 
-from open_notebook.domain import Note, Source
+from open_notebook.domain.notebook import Note, Source
 from open_notebook.graphs.chat import graph as chat_graph
 from open_notebook.plugins.podcasts import PodcastConfig
 from open_notebook.utils import token_count
diff --git a/stream_app/note.py b/stream_app/note.py
index b085cad..50c35cc 100644
--- a/stream_app/note.py
+++ b/stream_app/note.py
@@ -3,7 +3,7 @@ from humanize import naturaltime
 from loguru import logger
 from streamlit_monaco import st_monaco  # type: ignore
 
-from open_notebook.domain import Note
+from open_notebook.domain.notebook import Note
 from open_notebook.graphs.multipattern import graph as pattern_graph
 from open_notebook.utils import surreal_clean