> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ajayji.com/llms.txt
> Use this file to discover all available pages before exploring further.

# The Model Management Hub

> Under the Hood

The power and flexibility of the on-device AI in **aj** is made possible by a core architectural component: the Model Management Hub.

**Key Architectural Principles:**

* **Load Once, Use Anywhere:** When you load a model into memory, it stays loaded and ready for immediate use by any feature in the app.
* **Centralized State Management:** The Model Management Hub is the single source of truth for the state of all your on-device models.
* **You're in Control:** From the model management screen, you have granular control over your models.