What is Onisin OS?

Onisin OS (OOS) is an AI-first enterprise data system. It connects structured business data with an AI assistant — without traditional GUI development.

The Idea

Traditional business software separates data, interface, and logic into distinct layers. OOS inverts this principle: the AI is the interface. The user describes what they want to see or do — OOS handles the rest.

Core Principles

Contexts instead of Screens
Data lives in so-called Contexts. A Context describes a data entity (e.g. person, order) as XML — with fields, types, relations and display rules. OOS automatically generates GraphQL queries and HTML views from this definition.

MCP as the Backbone
OOS implements the Model Context Protocol (MCP). Claude Desktop (or any other MCP client) connects to OOS and receives a defined set of tools: load, display, edit, and save data.

AI Workflow — No Direct Writes
Data changes always follow a three-step workflow:

oos_query — load data and display it in the Board
oos_ui_change_required — show AI changes as a preview
oos_ui_save — user confirms, data is saved

No direct database writes without user confirmation.

Components

Component	Description
OOS Hub	Main process — MCP server, OAuth login, Board rendering
oosp (Plugin Server)	External MCP server for custom data sources
mcp-bridge	stdio→HTTP proxy for Claude Desktop
DSL	XML-based Context definition
Board	Display area in the Wails window

Technology Stack

Go + Wails — Desktop application (macOS, Windows, Linux)
GraphQL — automatically generated from DSL
HTML Templates — data binding via field=, loop=, bind= attributes
HashiCorp Vault — secret management
OAuth 2.0 / OIDC — authentication (e.g. Authentik)