# io-web-os/web-os architecture

> Architecture diagram of the GitHub repository io-web-os/web-os, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-26). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/io-web-os/web-os
- Repository: https://github.com/io-web-os/web-os
- Video tour (about a minute): https://gitdiagram.com/io-web-os/web-os/video

## Overview

The repository is a minimal Web-OS scaffold, not a functioning desktop environment: the client renders Create React App’s starter screen, and the server exposes only a welcome response and a not-found fallback. The principal visible workflow is browser loading the React entry point and rendering the starter component; separately, the server initializes MongoDB and mounts its routes. The README gives no further product capabilities, and no domain features are evident in the sampled source. The database loader references a models directory that is absent from the supplied tree.

Main entry points: [`server/routes/index.js`](https://github.com/io-web-os/web-os/blob/master/server/routes/index.js) (Welcome routes), [`server/app.js`](https://github.com/io-web-os/web-os/blob/master/server/app.js) (Express setup), [`client/src/index.js`](https://github.com/io-web-os/web-os/blob/master/client/src/index.js) (React entry), [`server/db.js`](https://github.com/io-web-os/web-os/blob/master/server/db.js) (Mongo connector)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_client["Browser client"]
  node_entry["React entry<br/>[index.js]"]
  node_app["Starter screen<br/>[App.js]"]
end

subgraph group_server["HTTP server"]
  node_server_app["Express setup<br/>[app.js]"]
  node_routes["Welcome routes<br/>[index.js]"]
end

subgraph group_data["Database setup"]
  node_db["Mongo connector<br/>[db.js]"]
end

node_browser(("Browser"))
node_mongo[("MongoDB")]

node_browser -->|"loads app"| node_entry
node_entry -->|"renders"| node_app
node_server_app -->|"mounts routes"| node_routes
node_server_app -->|"connects"| node_db
node_db -->|"connects"| node_mongo
node_browser -->|"requests HTTP"| node_routes
node_routes -->|"returns JSON"| node_browser

click node_entry "https://github.com/io-web-os/web-os/blob/master/client/src/index.js"
click node_app "https://github.com/io-web-os/web-os/blob/master/client/src/App.js"
click node_server_app "https://github.com/io-web-os/web-os/blob/master/server/app.js"
click node_routes "https://github.com/io-web-os/web-os/blob/master/server/routes/index.js"
click node_db "https://github.com/io-web-os/web-os/blob/master/server/db.js"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_entry,node_app,node_browser toneBlue
class node_server_app,node_routes,node_mongo toneAmber
class node_db toneMint
```

## Components

### Browser client

- [React entry](https://github.com/io-web-os/web-os/blob/master/client/src/index.js): `client/src/index.js`
- [Starter screen](https://github.com/io-web-os/web-os/blob/master/client/src/App.js): `client/src/App.js`

### HTTP server

- [Express setup](https://github.com/io-web-os/web-os/blob/master/server/app.js): `server/app.js`
- [Welcome routes](https://github.com/io-web-os/web-os/blob/master/server/routes/index.js): `server/routes/index.js`

### Database setup

- [Mongo connector](https://github.com/io-web-os/web-os/blob/master/server/db.js): `server/db.js`

### Other components

- **Browser**
- **MongoDB**

## Connections

- Browser → React entry: loads app
- React entry → Starter screen: renders
- Express setup → Welcome routes: mounts routes
- Express setup → Mongo connector: connects
- Mongo connector → MongoDB: connects
- Browser → Welcome routes: requests HTTP
- Welcome routes → Browser: returns JSON