#Modules

Everything in modAI is a module. There is no separate core — the chat UI, authentication, AI provider connections, and all other features are each their own module, wired together through configuration.

Adding a new module works exactly the same way as the built-in ones.

modAI splits into two halves: the frontend runs in the user's browser and handles everything visible, while the backend runs on the server and manages data, AI connections, and business logic. The two communicate over HTTP and server-sent events (SSE) for streaming.

Both halves are fully modular — read on to see which modules make up each side.

#Backend Modules

Backend modules run on the server — they provide API endpoints, manage data, and connect to external services.

backend
  - session        # authenticates requests and provides caller identity
  - chat           # handles AI chat interactions and streams responses
  - model_provider # connects to OpenAI-compatible APIs
  - tools          # manages callable tools the AI can invoke
  - user_settings  # stores per-user preferences
  - ...

#Frontend Modules

Frontend modules run in the browser — they render UI, manage navigation, and talk to the backend.

frontend
  - router                  # manages page navigation
  - chat                    # renders the chat interface
  - authentication          # handles login, logout, and session state
  - llm-provider-management # UI for configuring AI provider connections
  - chat-service            # abstracts the AI streaming API
  - ...

#Installing Additional Modules

A module's documentation must clearly state whether it is a backend module, a frontend module, or both.

• Installing Backend Modules
• Installing Frontend Modules