diff --git a/core/src/events.ts b/core/src/events.ts
index 1acbef918..7d3877046 100644
--- a/core/src/events.ts
+++ b/core/src/events.ts
@@ -1,25 +1,26 @@
+// TODO: refactor EventName to use the events defined in /types
 /**
  * The `EventName` enumeration contains the names of all the available events in the Jan platform.
  */
 export enum EventName {
   /** The `OnMessageSent` event is emitted when a message is sent. */
-  OnMessageSent = "OnMessageSent",
+  OnMessageSent = 'OnMessageSent',
   /** The `OnMessageResponse` event is emitted when a message is received. */
-  OnMessageResponse = "OnMessageResponse",
+  OnMessageResponse = 'OnMessageResponse',
   /** The `OnMessageUpdate` event is emitted when a message is updated. */
-  OnMessageUpdate = "OnMessageUpdate",
+  OnMessageUpdate = 'OnMessageUpdate',
   /** The `OnModelInit` event is emitted when a model inits. */
-  OnModelInit = "OnModelInit",
+  OnModelInit = 'OnModelInit',
   /** The `OnModelReady` event is emitted when a model ready. */
-  OnModelReady = "OnModelReady",
+  OnModelReady = 'OnModelReady',
   /** The `OnModelFail` event is emitted when a model fails loading. */
-  OnModelFail = "OnModelFail",
+  OnModelFail = 'OnModelFail',
   /** The `OnModelStop` event is emitted when a model start to stop. */
-  OnModelStop = "OnModelStop",
+  OnModelStop = 'OnModelStop',
   /** The `OnModelStopped` event is emitted when a model stopped ok. */
-  OnModelStopped = "OnModelStopped",
+  OnModelStopped = 'OnModelStopped',
   /** The `OnInferenceStopped` event is emitted when a inference is stopped. */
-  OnInferenceStopped = "OnInferenceStopped",
+  OnInferenceStopped = 'OnInferenceStopped',
 }
 
 /**
@@ -28,12 +29,9 @@ export enum EventName {
  * @param eventName The name of the event to observe.
  * @param handler The handler function to call when the event is observed.
  */
-const on: (eventName: string, handler: Function) => void = (
-  eventName,
-  handler
-) => {
-  global.core?.events?.on(eventName, handler);
-};
+const on: (eventName: string, handler: Function) => void = (eventName, handler) => {
+  global.core?.events?.on(eventName, handler)
+}
 
 /**
  * Removes an observer for an event.
@@ -41,12 +39,9 @@ const on: (eventName: string, handler: Function) => void = (
  * @param eventName The name of the event to stop observing.
  * @param handler The handler function to call when the event is observed.
  */
-const off: (eventName: string, handler: Function) => void = (
-  eventName,
-  handler
-) => {
-  global.core?.events?.off(eventName, handler);
-};
+const off: (eventName: string, handler: Function) => void = (eventName, handler) => {
+  global.core?.events?.off(eventName, handler)
+}
 
 /**
  * Emits an event.
@@ -55,11 +50,11 @@ const off: (eventName: string, handler: Function) => void = (
  * @param object The object to pass to the event callback.
  */
 const emit: (eventName: string, object: any) => void = (eventName, object) => {
-  global.core?.events?.emit(eventName, object);
-};
+  global.core?.events?.emit(eventName, object)
+}
 
 export const events = {
   on,
   off,
   emit,
-};
+}
diff --git a/core/src/extensions/assistant.ts b/core/src/extensions/assistant.ts
index 56c1f27b7..96646e374 100644
--- a/core/src/extensions/assistant.ts
+++ b/core/src/extensions/assistant.ts
@@ -1,28 +1,12 @@
-import { Assistant } from "../index";
-import { BaseExtension } from "../extension";
+import { Assistant, AssistantInterface } from '../index'
+import { BaseExtension } from '../extension'
 
 /**
  * Assistant extension for managing assistants.
  * @extends BaseExtension
  */
-export abstract class AssistantExtension extends BaseExtension {
-  /**
-   * Creates a new assistant.
-   * @param {Assistant} assistant - The assistant object to be created.
-   * @returns {Promise<void>} A promise that resolves when the assistant has been created.
-   */
-  abstract createAssistant(assistant: Assistant): Promise<void>;
-
-  /**
-   * Deletes an existing assistant.
-   * @param {Assistant} assistant - The assistant object to be deleted.
-   * @returns {Promise<void>} A promise that resolves when the assistant has been deleted.
-   */
-  abstract deleteAssistant(assistant: Assistant): Promise<void>;
-
-  /**
-   * Retrieves all existing assistants.
-   * @returns {Promise<Assistant[]>} A promise that resolves to an array of all assistants.
-   */
-  abstract getAssistants(): Promise<Assistant[]>;
+export abstract class AssistantExtension extends BaseExtension implements AssistantInterface {
+  abstract createAssistant(assistant: Assistant): Promise<void>
+  abstract deleteAssistant(assistant: Assistant): Promise<void>
+  abstract getAssistants(): Promise<Assistant[]>
 }
diff --git a/core/src/extensions/conversational.ts b/core/src/extensions/conversational.ts
index 291346531..673ea9c11 100644
--- a/core/src/extensions/conversational.ts
+++ b/core/src/extensions/conversational.ts
@@ -1,57 +1,19 @@
-import { Thread, ThreadMessage } from "../index";
-import { BaseExtension } from "../extension";
+import { Thread, ThreadInterface, ThreadMessage, MessageInterface } from '../index'
+import { BaseExtension } from '../extension'
 
 /**
  * Conversational extension. Persists and retrieves conversations.
  * @abstract
  * @extends BaseExtension
  */
-export abstract class ConversationalExtension extends BaseExtension {
-  /**
-   * Returns a list of thread.
-   * @abstract
-   * @returns {Promise<Thread[]>} A promise that resolves to an array of threads.
-   */
-  abstract getThreads(): Promise<Thread[]>;
-
-  /**
-   * Saves a thread.
-   * @abstract
-   * @param {Thread} thread - The thread to save.
-   * @returns {Promise<void>} A promise that resolves when the thread is saved.
-   */
-  abstract saveThread(thread: Thread): Promise<void>;
-
-  /**
-   * Deletes a thread.
-   * @abstract
-   * @param {string} threadId - The ID of the thread to delete.
-   * @returns {Promise<void>} A promise that resolves when the thread is deleted.
-   */
-  abstract deleteThread(threadId: string): Promise<void>;
-
-  /**
-   * Adds a new message to the thread.
-   * @param {ThreadMessage} message - The message to be added.
-   * @returns {Promise<void>} A promise that resolves when the message has been added.
-   */
-  abstract addNewMessage(message: ThreadMessage): Promise<void>;
-
-  /**
-   * Writes an array of messages to a specific thread.
-   * @param {string} threadId - The ID of the thread to write the messages to.
-   * @param {ThreadMessage[]} messages - The array of messages to be written.
-   * @returns {Promise<void>} A promise that resolves when the messages have been written.
-   */
-  abstract writeMessages(
-    threadId: string,
-    messages: ThreadMessage[]
-  ): Promise<void>;
-
-  /**
-   * Retrieves all messages from a specific thread.
-   * @param {string} threadId - The ID of the thread to retrieve the messages from.
-   * @returns {Promise<ThreadMessage[]>} A promise that resolves to an array of messages from the thread.
-   */
-  abstract getAllMessages(threadId: string): Promise<ThreadMessage[]>;
+export abstract class ConversationalExtension
+  extends BaseExtension
+  implements ThreadInterface, MessageInterface
+{
+  abstract getThreads(): Promise<Thread[]>
+  abstract saveThread(thread: Thread): Promise<void>
+  abstract deleteThread(threadId: string): Promise<void>
+  abstract addNewMessage(message: ThreadMessage): Promise<void>
+  abstract writeMessages(threadId: string, messages: ThreadMessage[]): Promise<void>
+  abstract getAllMessages(threadId: string): Promise<ThreadMessage[]>
 }
diff --git a/core/src/extensions/inference.ts b/core/src/extensions/inference.ts
index 9453a06d5..f3654934a 100644
--- a/core/src/extensions/inference.ts
+++ b/core/src/extensions/inference.ts
@@ -1,14 +1,9 @@
-import { MessageRequest, ModelSettingParams, ThreadMessage } from "../index";
-import { BaseExtension } from "../extension";
+import { InferenceInterface, MessageRequest, ThreadMessage } from '../index'
+import { BaseExtension } from '../extension'
 
 /**
  * Inference extension. Start, stop and inference models.
  */
-export abstract class InferenceExtension extends BaseExtension {
-  /**
-   * Processes an inference request.
-   * @param data - The data for the inference request.
-   * @returns The result of the inference request.
-   */
-  abstract inference(data: MessageRequest): Promise<ThreadMessage>;
+export abstract class InferenceExtension extends BaseExtension implements InferenceInterface {
+  abstract inference(data: MessageRequest): Promise<ThreadMessage>
 }
diff --git a/core/src/extensions/model.ts b/core/src/extensions/model.ts
index 276d15dcc..cac9d9d89 100644
--- a/core/src/extensions/model.ts
+++ b/core/src/extensions/model.ts
@@ -1,47 +1,14 @@
-import { BaseExtension } from "../extension";
-import { Model } from "../types/index";
+import { BaseExtension } from '../extension'
+import { Model, ModelInterface } from '../index'
 
 /**
  * Model extension for managing models.
  */
-export abstract class ModelExtension extends BaseExtension {
-  /**
-   * Downloads a model.
-   * @param model - The model to download.
-   * @returns A Promise that resolves when the model has been downloaded.
-   */
-  abstract downloadModel(model: Model): Promise<void>;
-
-  /**
-   * Cancels the download of a specific model.
-   * @param {string} modelId - The ID of the model to cancel the download for.
-   * @returns {Promise<void>} A promise that resolves when the download has been cancelled.
-   */
-  abstract cancelModelDownload(modelId: string): Promise<void>;
-
-  /**
-   * Deletes a model.
-   * @param modelId - The ID of the model to delete.
-   * @returns A Promise that resolves when the model has been deleted.
-   */
-  abstract deleteModel(modelId: string): Promise<void>;
-
-  /**
-   * Saves a model.
-   * @param model - The model to save.
-   * @returns A Promise that resolves when the model has been saved.
-   */
-  abstract saveModel(model: Model): Promise<void>;
-
-  /**
-   * Gets a list of downloaded models.
-   * @returns A Promise that resolves with an array of downloaded models.
-   */
-  abstract getDownloadedModels(): Promise<Model[]>;
-
-  /**
-   * Gets a list of configured models.
-   * @returns A Promise that resolves with an array of configured models.
-   */
-  abstract getConfiguredModels(): Promise<Model[]>;
+export abstract class ModelExtension extends BaseExtension implements ModelInterface {
+  abstract downloadModel(model: Model): Promise<void>
+  abstract cancelModelDownload(modelId: string): Promise<void>
+  abstract deleteModel(modelId: string): Promise<void>
+  abstract saveModel(model: Model): Promise<void>
+  abstract getDownloadedModels(): Promise<Model[]>
+  abstract getConfiguredModels(): Promise<Model[]>
 }
diff --git a/core/src/extensions/monitoring.ts b/core/src/extensions/monitoring.ts
index f3d66e658..94f437f86 100644
--- a/core/src/extensions/monitoring.ts
+++ b/core/src/extensions/monitoring.ts
@@ -1,19 +1,11 @@
-import { BaseExtension } from "../extension";
+import { BaseExtension } from '../extension'
+import { MonitoringInterface } from '../index'
 
 /**
  * Monitoring extension for system monitoring.
  * @extends BaseExtension
  */
-export abstract class MonitoringExtension extends BaseExtension {
-  /**
-   * Returns information about the system resources.
-   * @returns {Promise<any>} A promise that resolves with the system resources information.
-   */
-  abstract getResourcesInfo(): Promise<any>;
-
-  /**
-   * Returns the current system load.
-   * @returns {Promise<any>} A promise that resolves with the current system load.
-   */
-  abstract getCurrentLoad(): Promise<any>;
+export abstract class MonitoringExtension extends BaseExtension implements MonitoringInterface {
+  abstract getResourcesInfo(): Promise<any>
+  abstract getCurrentLoad(): Promise<any>
 }
diff --git a/core/src/types/assistant/assistantEntity.ts b/core/src/types/assistant/assistantEntity.ts
new file mode 100644
index 000000000..91bb2bb22
--- /dev/null
+++ b/core/src/types/assistant/assistantEntity.ts
@@ -0,0 +1,30 @@
+/**
+ * Assistant type defines the shape of an assistant object.
+ * @stored
+ */
+export type Assistant = {
+  /** Represents the avatar of the user. */
+  avatar: string
+  /** Represents the location of the thread. */
+  thread_location: string | undefined
+  /** Represents the unique identifier of the object. */
+  id: string
+  /** Represents the object. */
+  object: string
+  /** Represents the creation timestamp of the object. */
+  created_at: number
+  /** Represents the name of the object. */
+  name: string
+  /** Represents the description of the object. */
+  description?: string
+  /** Represents the model of the object. */
+  model: string
+  /** Represents the instructions for the object. */
+  instructions?: string
+  /** Represents the tools associated with the object. */
+  tools?: any
+  /** Represents the file identifiers associated with the object. */
+  file_ids: string[]
+  /** Represents the metadata of the object. */
+  metadata?: Record<string, unknown>
+}
diff --git a/core/src/types/assistant/assistantInterface.ts b/core/src/types/assistant/assistantInterface.ts
new file mode 100644
index 000000000..3c10bbb7f
--- /dev/null
+++ b/core/src/types/assistant/assistantInterface.ts
@@ -0,0 +1,26 @@
+import { Assistant } from './assistantEntity'
+/**
+ * Assistant extension for managing assistants.
+ * @extends BaseExtension
+ */
+export interface AssistantInterface {
+  /**
+   * Creates a new assistant.
+   * @param {Assistant} assistant - The assistant object to be created.
+   * @returns {Promise<void>} A promise that resolves when the assistant has been created.
+   */
+  createAssistant(assistant: Assistant): Promise<void>
+
+  /**
+   * Deletes an existing assistant.
+   * @param {Assistant} assistant - The assistant object to be deleted.
+   * @returns {Promise<void>} A promise that resolves when the assistant has been deleted.
+   */
+  deleteAssistant(assistant: Assistant): Promise<void>
+
+  /**
+   * Retrieves all existing assistants.
+   * @returns {Promise<Assistant[]>} A promise that resolves to an array of all assistants.
+   */
+  getAssistants(): Promise<Assistant[]>
+}
diff --git a/core/src/types/assistant/index.ts b/core/src/types/assistant/index.ts
new file mode 100644
index 000000000..83ea73f85
--- /dev/null
+++ b/core/src/types/assistant/index.ts
@@ -0,0 +1,2 @@
+export * from './assistantEntity'
+export * from './assistantInterface'
diff --git a/core/src/types/index.ts b/core/src/types/index.ts
index 2e19f61d8..a4722ba78 100644
--- a/core/src/types/index.ts
+++ b/core/src/types/index.ts
@@ -1,328 +1,6 @@
-/**
- * Message Request and Response
- * ============================
- * */
-
-/**
- * The role of the author of this message.
- */
-export enum ChatCompletionRole {
-  System = "system",
-  Assistant = "assistant",
-  User = "user",
-}
-
-/**
- * The `MessageRequest` type defines the shape of a new message request object.
- * @data_transfer_object
- */
-export type ChatCompletionMessage = {
-  /** The contents of the message. **/
-  content?: string;
-  /** The role of the author of this message. **/
-  role: ChatCompletionRole;
-};
-
-/**
- * The `MessageRequest` type defines the shape of a new message request object.
- * @data_transfer_object
- */
-export type MessageRequest = {
-  id?: string;
-
-  /** The thread id of the message request. **/
-  threadId: string;
-
-  /**
-   * The assistant id of the message request.
-   */
-  assistantId?: string;
-
-  /** Messages for constructing a chat completion request **/
-  messages?: ChatCompletionMessage[];
-
-  /** Settings for constructing a chat completion request **/
-  model?: ModelInfo;
-};
-
-/**
- * Thread and Message
- * ========================
- * */
-
-/**
- * The status of the message.
- * @data_transfer_object
- */
-export enum MessageStatus {
-  /** Message is fully loaded. **/
-  Ready = "ready",
-  /** Message is not fully loaded. **/
-  Pending = "pending",
-}
-/**
- * The `ThreadMessage` type defines the shape of a thread's message object.
- * @stored
- */
-export type ThreadMessage = {
-  /** Unique identifier for the message, generated by default using the ULID method. **/
-  id: string;
-  /** Object name **/
-  object: string;
-  /** Thread id, default is a ulid. **/
-  thread_id: string;
-  /** The assistant id of this thread. **/
-  assistant_id?: string;
-  /** The role of the author of this message. **/
-  role: ChatCompletionRole;
-  /** The content of this message. **/
-  content: ThreadContent[];
-  /** The status of this message. **/
-  status: MessageStatus;
-  /** The timestamp indicating when this message was created. Represented in Unix time. **/
-  created: number;
-  /** The timestamp indicating when this message was updated. Represented in Unix time. **/
-  updated: number;
-  /** The additional metadata of this message. **/
-  metadata?: Record<string, unknown>;
-};
-
-/**
- * The content type of the message.
- */
-export enum ContentType {
-  Text = "text",
-  Image = "image",
-}
-/**
- * The `ThreadContent` type defines the shape of a message's content object
- * @data_transfer_object
- */
-export type ThreadContent = {
-  type: ContentType;
-  text: ContentValue;
-};
-
-/**
- * The `ContentValue` type defines the shape of a content value object
- * @data_transfer_object
- */
-export type ContentValue = {
-  value: string;
-  annotations: string[];
-};
-
-/**
- * The `Thread` type defines the shape of a thread object.
- * @stored
- */
-export interface Thread {
-  /** Unique identifier for the thread, generated by default using the ULID method. **/
-  id: string;
-  /** Object name **/
-  object: string;
-  /** The title of this thread. **/
-  title: string;
-  /** Assistants in this thread. **/
-  assistants: ThreadAssistantInfo[];
-  /** The timestamp indicating when this thread was created, represented in ISO 8601 format. **/
-  created: number;
-  /** The timestamp indicating when this thread was updated, represented in ISO 8601 format. **/
-  updated: number;
-  /** The additional metadata of this thread. **/
-  metadata?: Record<string, unknown>;
-}
-
-/**
- * Represents the information about an assistant in a thread.
- * @stored
- */
-export type ThreadAssistantInfo = {
-  assistant_id: string;
-  assistant_name: string;
-  model: ModelInfo;
-  instructions?: string;
-};
-
-/**
- * Represents the information about a model.
- * @stored
- */
-export type ModelInfo = {
-  id: string;
-  settings: ModelSettingParams;
-  parameters: ModelRuntimeParams;
-  engine?: InferenceEngine;
-};
-
-/**
- * Represents the state of a thread.
- * @stored
- */
-export type ThreadState = {
-  hasMore: boolean;
-  waitingForResponse: boolean;
-  error?: Error;
-  lastMessage?: string;
-  isFinishInit?: boolean;
-};
-/**
- * Represents the inference engine.
- * @stored
- */
-
-enum InferenceEngine {
-  nitro = "nitro",
-  openai = "openai",
-  triton_trtllm = "triton_trtllm",
-  hf_endpoint = "hf_endpoint",
-}
-
-/**
- * Model type defines the shape of a model object.
- * @stored
- */
-export interface Model {
-  /**
-   * The type of the object.
-   * Default: "model"
-   */
-  object: string;
-
-  /**
-   * The version of the model.
-   */
-  version: number;
-
-  /**
-   * The format of the model.
-   */
-  format: string;
-
-  /**
-   * The model download source. It can be an external url or a local filepath.
-   */
-  source_url: string;
-
-  /**
-   * The model identifier, which can be referenced in the API endpoints.
-   */
-  id: string;
-
-  /**
-   * Human-readable name that is used for UI.
-   */
-  name: string;
-
-  /**
-   * The Unix timestamp (in seconds) for when the model was created
-   */
-  created: number;
-
-  /**
-   * Default: "A cool model from Huggingface"
-   */
-  description: string;
-
-  /**
-   * The model state.
-   * Default: "to_download"
-   * Enum: "to_download" "downloading" "ready" "running"
-   */
-  state?: ModelState;
-
-  /**
-   * The model settings.
-   */
-  settings: ModelSettingParams;
-
-  /**
-   * The model runtime parameters.
-   */
-  parameters: ModelRuntimeParams;
-
-  /**
-   * Metadata of the model.
-   */
-  metadata: ModelMetadata;
-  /**
-   * The model engine.
-   */
-  engine: InferenceEngine;
-}
-
-export type ModelMetadata = {
-  author: string;
-  tags: string[];
-  size: number;
-  cover?: string;
-};
-
-/**
- * The Model transition states.
- */
-export enum ModelState {
-  Downloading = "downloading",
-  Ready = "ready",
-  Running = "running",
-}
-
-/**
- * The available model settings.
- */
-export type ModelSettingParams = {
-  ctx_len?: number;
-  ngl?: number;
-  embedding?: boolean;
-  n_parallel?: number;
-  cpu_threads?: number;
-  system_prompt?: string;
-  user_prompt?: string;
-  ai_prompt?: string;
-};
-
-/**
- * The available model runtime parameters.
- */
-export type ModelRuntimeParams = {
-  temperature?: number;
-  token_limit?: number;
-  top_k?: number;
-  top_p?: number;
-  stream?: boolean;
-  max_tokens?: number;
-  stop?: string[];
-  frequency_penalty?: number;
-  presence_penalty?: number;
-};
-
-/**
- * Assistant type defines the shape of an assistant object.
- * @stored
- */
-export type Assistant = {
-  /** Represents the avatar of the user. */
-  avatar: string;
-  /** Represents the location of the thread. */
-  thread_location: string | undefined;
-  /** Represents the unique identifier of the object. */
-  id: string;
-  /** Represents the object. */
-  object: string;
-  /** Represents the creation timestamp of the object. */
-  created_at: number;
-  /** Represents the name of the object. */
-  name: string;
-  /** Represents the description of the object. */
-  description?: string;
-  /** Represents the model of the object. */
-  model: string;
-  /** Represents the instructions for the object. */
-  instructions?: string;
-  /** Represents the tools associated with the object. */
-  tools?: any;
-  /** Represents the file identifiers associated with the object. */
-  file_ids: string[];
-  /** Represents the metadata of the object. */
-  metadata?: Record<string, unknown>;
-};
+export * from './assistant'
+export * from './model'
+export * from './thread'
+export * from './message'
+export * from './inference'
+export * from './monitoring'
diff --git a/core/src/types/inference/index.ts b/core/src/types/inference/index.ts
new file mode 100644
index 000000000..a0a71f142
--- /dev/null
+++ b/core/src/types/inference/index.ts
@@ -0,0 +1,3 @@
+export * from './inferenceEntity'
+export * from './inferenceInterface'
+export * from './inferenceEvent'
diff --git a/core/src/types/inference/inferenceEntity.ts b/core/src/types/inference/inferenceEntity.ts
new file mode 100644
index 000000000..58b838ae7
--- /dev/null
+++ b/core/src/types/inference/inferenceEntity.ts
@@ -0,0 +1,19 @@
+/**
+ * The role of the author of this message.
+ */
+export enum ChatCompletionRole {
+  System = 'system',
+  Assistant = 'assistant',
+  User = 'user',
+}
+
+/**
+ * The `MessageRequest` type defines the shape of a new message request object.
+ * @data_transfer_object
+ */
+export type ChatCompletionMessage = {
+  /** The contents of the message. **/
+  content?: string
+  /** The role of the author of this message. **/
+  role: ChatCompletionRole
+}
diff --git a/core/src/types/inference/inferenceEvent.ts b/core/src/types/inference/inferenceEvent.ts
new file mode 100644
index 000000000..f685a54b3
--- /dev/null
+++ b/core/src/types/inference/inferenceEvent.ts
@@ -0,0 +1,7 @@
+/**
+ * The `EventName` enumeration contains the names of all the available events in the Jan platform.
+ */
+export enum InferenceEvent {
+  /** The `OnInferenceStopped` event is emitted when a inference is stopped. */
+  OnInferenceStopped = 'OnInferenceStopped',
+}
diff --git a/core/src/types/inference/inferenceInterface.ts b/core/src/types/inference/inferenceInterface.ts
new file mode 100644
index 000000000..21e327e45
--- /dev/null
+++ b/core/src/types/inference/inferenceInterface.ts
@@ -0,0 +1,13 @@
+import { MessageRequest, ThreadMessage } from '../message'
+
+/**
+ * Inference extension. Start, stop and inference models.
+ */
+export interface InferenceInterface {
+  /**
+   * Processes an inference request.
+   * @param data - The data for the inference request.
+   * @returns The result of the inference request.
+   */
+  inference(data: MessageRequest): Promise<ThreadMessage>
+}
diff --git a/core/src/types/message/index.ts b/core/src/types/message/index.ts
new file mode 100644
index 000000000..e8d78deda
--- /dev/null
+++ b/core/src/types/message/index.ts
@@ -0,0 +1,3 @@
+export * from './messageEntity'
+export * from './messageInterface'
+export * from './messageEvent'
diff --git a/core/src/types/message/messageEntity.ts b/core/src/types/message/messageEntity.ts
new file mode 100644
index 000000000..ba3399b24
--- /dev/null
+++ b/core/src/types/message/messageEntity.ts
@@ -0,0 +1,88 @@
+import { ChatCompletionMessage, ChatCompletionRole } from '../inference'
+import { ModelInfo } from '../model'
+
+/**
+ * The `ThreadMessage` type defines the shape of a thread's message object.
+ * @stored
+ */
+export type ThreadMessage = {
+  /** Unique identifier for the message, generated by default using the ULID method. **/
+  id: string
+  /** Object name **/
+  object: string
+  /** Thread id, default is a ulid. **/
+  thread_id: string
+  /** The assistant id of this thread. **/
+  assistant_id?: string
+  /** The role of the author of this message. **/
+  role: ChatCompletionRole
+  /** The content of this message. **/
+  content: ThreadContent[]
+  /** The status of this message. **/
+  status: MessageStatus
+  /** The timestamp indicating when this message was created. Represented in Unix time. **/
+  created: number
+  /** The timestamp indicating when this message was updated. Represented in Unix time. **/
+  updated: number
+  /** The additional metadata of this message. **/
+  metadata?: Record<string, unknown>
+}
+
+/**
+ * The `MessageRequest` type defines the shape of a new message request object.
+ * @data_transfer_object
+ */
+export type MessageRequest = {
+  id?: string
+
+  /** The thread id of the message request. **/
+  threadId: string
+
+  /**
+   * The assistant id of the message request.
+   */
+  assistantId?: string
+
+  /** Messages for constructing a chat completion request **/
+  messages?: ChatCompletionMessage[]
+
+  /** Settings for constructing a chat completion request **/
+  model?: ModelInfo
+}
+
+/**
+ * The status of the message.
+ * @data_transfer_object
+ */
+export enum MessageStatus {
+  /** Message is fully loaded. **/
+  Ready = 'ready',
+  /** Message is not fully loaded. **/
+  Pending = 'pending',
+}
+
+/**
+ * The content type of the message.
+ */
+export enum ContentType {
+  Text = 'text',
+  Image = 'image',
+}
+
+/**
+ * The `ContentValue` type defines the shape of a content value object
+ * @data_transfer_object
+ */
+export type ContentValue = {
+  value: string
+  annotations: string[]
+}
+
+/**
+ * The `ThreadContent` type defines the shape of a message's content object
+ * @data_transfer_object
+ */
+export type ThreadContent = {
+  type: ContentType
+  text: ContentValue
+}
diff --git a/core/src/types/message/messageEvent.ts b/core/src/types/message/messageEvent.ts
new file mode 100644
index 000000000..40fd84c30
--- /dev/null
+++ b/core/src/types/message/messageEvent.ts
@@ -0,0 +1,8 @@
+export enum MessageEvent {
+  /** The `OnMessageSent` event is emitted when a message is sent. */
+  OnMessageSent = 'OnMessageSent',
+  /** The `OnMessageResponse` event is emitted when a message is received. */
+  OnMessageResponse = 'OnMessageResponse',
+  /** The `OnMessageUpdate` event is emitted when a message is updated. */
+  OnMessageUpdate = 'OnMessageUpdate',
+}
diff --git a/core/src/types/message/messageInterface.ts b/core/src/types/message/messageInterface.ts
new file mode 100644
index 000000000..f6579da88
--- /dev/null
+++ b/core/src/types/message/messageInterface.ts
@@ -0,0 +1,30 @@
+import { ThreadMessage } from './messageEntity'
+
+/**
+ * Conversational extension. Persists and retrieves conversations.
+ * @abstract
+ * @extends BaseExtension
+ */
+export interface MessageInterface {
+  /**
+   * Adds a new message to the thread.
+   * @param {ThreadMessage} message - The message to be added.
+   * @returns {Promise<void>} A promise that resolves when the message has been added.
+   */
+  addNewMessage(message: ThreadMessage): Promise<void>
+
+  /**
+   * Writes an array of messages to a specific thread.
+   * @param {string} threadId - The ID of the thread to write the messages to.
+   * @param {ThreadMessage[]} messages - The array of messages to be written.
+   * @returns {Promise<void>} A promise that resolves when the messages have been written.
+   */
+  writeMessages(threadId: string, messages: ThreadMessage[]): Promise<void>
+
+  /**
+   * Retrieves all messages from a specific thread.
+   * @param {string} threadId - The ID of the thread to retrieve the messages from.
+   * @returns {Promise<ThreadMessage[]>} A promise that resolves to an array of messages from the thread.
+   */
+  getAllMessages(threadId: string): Promise<ThreadMessage[]>
+}
diff --git a/core/src/types/model/index.ts b/core/src/types/model/index.ts
new file mode 100644
index 000000000..cba06ea95
--- /dev/null
+++ b/core/src/types/model/index.ts
@@ -0,0 +1,3 @@
+export * from './modelEntity'
+export * from './modelInterface'
+export * from './modelEvent'
diff --git a/core/src/types/model/modelEntity.ts b/core/src/types/model/modelEntity.ts
new file mode 100644
index 000000000..6f045588c
--- /dev/null
+++ b/core/src/types/model/modelEntity.ts
@@ -0,0 +1,140 @@
+/**
+ * Represents the information about a model.
+ * @stored
+ */
+export type ModelInfo = {
+  id: string
+  settings: ModelSettingParams
+  parameters: ModelRuntimeParams
+  engine?: InferenceEngine
+}
+
+/**
+ * Represents the inference engine.
+ * @stored
+ */
+
+enum InferenceEngine {
+  nitro = 'nitro',
+  openai = 'openai',
+  triton_trtllm = 'triton_trtllm',
+  hf_endpoint = 'hf_endpoint',
+}
+
+/**
+ * Model type defines the shape of a model object.
+ * @stored
+ */
+export type Model = {
+  /**
+   * The type of the object.
+   * Default: "model"
+   */
+  object: string
+
+  /**
+   * The version of the model.
+   */
+  version: number
+
+  /**
+   * The format of the model.
+   */
+  format: string
+
+  /**
+   * The model download source. It can be an external url or a local filepath.
+   */
+  source_url: string
+
+  /**
+   * The model identifier, which can be referenced in the API endpoints.
+   */
+  id: string
+
+  /**
+   * Human-readable name that is used for UI.
+   */
+  name: string
+
+  /**
+   * The Unix timestamp (in seconds) for when the model was created
+   */
+  created: number
+
+  /**
+   * Default: "A cool model from Huggingface"
+   */
+  description: string
+
+  /**
+   * The model state.
+   * Default: "to_download"
+   * Enum: "to_download" "downloading" "ready" "running"
+   */
+  state?: ModelState
+
+  /**
+   * The model settings.
+   */
+  settings: ModelSettingParams
+
+  /**
+   * The model runtime parameters.
+   */
+  parameters: ModelRuntimeParams
+
+  /**
+   * Metadata of the model.
+   */
+  metadata: ModelMetadata
+  /**
+   * The model engine.
+   */
+  engine: InferenceEngine
+}
+
+export type ModelMetadata = {
+  author: string
+  tags: string[]
+  size: number
+  cover?: string
+}
+
+/**
+ * The Model transition states.
+ */
+export enum ModelState {
+  Downloading = 'downloading',
+  Ready = 'ready',
+  Running = 'running',
+}
+
+/**
+ * The available model settings.
+ */
+export type ModelSettingParams = {
+  ctx_len?: number
+  ngl?: number
+  embedding?: boolean
+  n_parallel?: number
+  cpu_threads?: number
+  system_prompt?: string
+  user_prompt?: string
+  ai_prompt?: string
+}
+
+/**
+ * The available model runtime parameters.
+ */
+export type ModelRuntimeParams = {
+  temperature?: number
+  token_limit?: number
+  top_k?: number
+  top_p?: number
+  stream?: boolean
+  max_tokens?: number
+  stop?: string[]
+  frequency_penalty?: number
+  presence_penalty?: number
+}
diff --git a/core/src/types/model/modelEvent.ts b/core/src/types/model/modelEvent.ts
new file mode 100644
index 000000000..978a48724
--- /dev/null
+++ b/core/src/types/model/modelEvent.ts
@@ -0,0 +1,15 @@
+/**
+ * The `EventName` enumeration contains the names of all the available events in the Jan platform.
+ */
+export enum ModelEvent {
+  /** The `OnModelInit` event is emitted when a model inits. */
+  OnModelInit = 'OnModelInit',
+  /** The `OnModelReady` event is emitted when a model ready. */
+  OnModelReady = 'OnModelReady',
+  /** The `OnModelFail` event is emitted when a model fails loading. */
+  OnModelFail = 'OnModelFail',
+  /** The `OnModelStop` event is emitted when a model start to stop. */
+  OnModelStop = 'OnModelStop',
+  /** The `OnModelStopped` event is emitted when a model stopped ok. */
+  OnModelStopped = 'OnModelStopped',
+}
diff --git a/core/src/types/model/modelInterface.ts b/core/src/types/model/modelInterface.ts
new file mode 100644
index 000000000..19b5e6051
--- /dev/null
+++ b/core/src/types/model/modelInterface.ts
@@ -0,0 +1,46 @@
+import { Model } from './modelEntity'
+
+/**
+ * Model extension for managing models.
+ */
+export interface ModelInterface {
+  /**
+   * Downloads a model.
+   * @param model - The model to download.
+   * @returns A Promise that resolves when the model has been downloaded.
+   */
+  downloadModel(model: Model): Promise<void>
+
+  /**
+   * Cancels the download of a specific model.
+   * @param {string} modelId - The ID of the model to cancel the download for.
+   * @returns {Promise<void>} A promise that resolves when the download has been cancelled.
+   */
+  cancelModelDownload(modelId: string): Promise<void>
+
+  /**
+   * Deletes a model.
+   * @param modelId - The ID of the model to delete.
+   * @returns A Promise that resolves when the model has been deleted.
+   */
+  deleteModel(modelId: string): Promise<void>
+
+  /**
+   * Saves a model.
+   * @param model - The model to save.
+   * @returns A Promise that resolves when the model has been saved.
+   */
+  saveModel(model: Model): Promise<void>
+
+  /**
+   * Gets a list of downloaded models.
+   * @returns A Promise that resolves with an array of downloaded models.
+   */
+  getDownloadedModels(): Promise<Model[]>
+
+  /**
+   * Gets a list of configured models.
+   * @returns A Promise that resolves with an array of configured models.
+   */
+  getConfiguredModels(): Promise<Model[]>
+}
diff --git a/core/src/types/monitoring/index.ts b/core/src/types/monitoring/index.ts
new file mode 100644
index 000000000..5828dae8b
--- /dev/null
+++ b/core/src/types/monitoring/index.ts
@@ -0,0 +1 @@
+export * from './monitoringInterface'
diff --git a/core/src/types/monitoring/monitoringInterface.ts b/core/src/types/monitoring/monitoringInterface.ts
new file mode 100644
index 000000000..ffdbebcc1
--- /dev/null
+++ b/core/src/types/monitoring/monitoringInterface.ts
@@ -0,0 +1,17 @@
+/**
+ * Monitoring extension for system monitoring.
+ * @extends BaseExtension
+ */
+export interface MonitoringInterface {
+  /**
+   * Returns information about the system resources.
+   * @returns {Promise<any>} A promise that resolves with the system resources information.
+   */
+  getResourcesInfo(): Promise<any>
+
+  /**
+   * Returns the current system load.
+   * @returns {Promise<any>} A promise that resolves with the current system load.
+   */
+  getCurrentLoad(): Promise<any>
+}
diff --git a/core/src/types/thread/index.ts b/core/src/types/thread/index.ts
new file mode 100644
index 000000000..c6ff6204a
--- /dev/null
+++ b/core/src/types/thread/index.ts
@@ -0,0 +1,2 @@
+export * from './threadEntity'
+export * from './threadInterface'
diff --git a/core/src/types/thread/threadEntity.ts b/core/src/types/thread/threadEntity.ts
new file mode 100644
index 000000000..4ff3aa1fc
--- /dev/null
+++ b/core/src/types/thread/threadEntity.ts
@@ -0,0 +1,45 @@
+import { ModelInfo } from '../model'
+
+/**
+ * The `Thread` type defines the shape of a thread object.
+ * @stored
+ */
+export type Thread = {
+  /** Unique identifier for the thread, generated by default using the ULID method. **/
+  id: string
+  /** Object name **/
+  object: string
+  /** The title of this thread. **/
+  title: string
+  /** Assistants in this thread. **/
+  assistants: ThreadAssistantInfo[]
+  /** The timestamp indicating when this thread was created, represented in ISO 8601 format. **/
+  created: number
+  /** The timestamp indicating when this thread was updated, represented in ISO 8601 format. **/
+  updated: number
+  /** The additional metadata of this thread. **/
+  metadata?: Record<string, unknown>
+}
+
+/**
+ * Represents the information about an assistant in a thread.
+ * @stored
+ */
+export type ThreadAssistantInfo = {
+  assistant_id: string
+  assistant_name: string
+  model: ModelInfo
+  instructions?: string
+}
+
+/**
+ * Represents the state of a thread.
+ * @stored
+ */
+export type ThreadState = {
+  hasMore: boolean
+  waitingForResponse: boolean
+  error?: Error
+  lastMessage?: string
+  isFinishInit?: boolean
+}
diff --git a/core/src/types/thread/threadInterface.ts b/core/src/types/thread/threadInterface.ts
new file mode 100644
index 000000000..792c8c8a5
--- /dev/null
+++ b/core/src/types/thread/threadInterface.ts
@@ -0,0 +1,31 @@
+import { Thread } from './threadEntity'
+
+/**
+ * Conversational extension. Persists and retrieves conversations.
+ * @abstract
+ * @extends BaseExtension
+ */
+export interface ThreadInterface {
+  /**
+   * Returns a list of thread.
+   * @abstract
+   * @returns {Promise<Thread[]>} A promise that resolves to an array of threads.
+   */
+  getThreads(): Promise<Thread[]>
+
+  /**
+   * Saves a thread.
+   * @abstract
+   * @param {Thread} thread - The thread to save.
+   * @returns {Promise<void>} A promise that resolves when the thread is saved.
+   */
+  saveThread(thread: Thread): Promise<void>
+
+  /**
+   * Deletes a thread.
+   * @abstract
+   * @param {string} threadId - The ID of the thread to delete.
+   * @returns {Promise<void>} A promise that resolves when the thread is deleted.
+   */
+  deleteThread(threadId: string): Promise<void>
+}