# Models

Pure data structures and type definitions

## Purpose

Define data shapes, types, and factory functions for type safety

## Layout

```
models/
├── context.md        # This file
├── chat-data.ts      # Chat types and factories
└── segment-view.ts   # Segment visualization and todo parsing
```

## Scope

- In-scope: Type definitions, interfaces, factory functions
- Out-of-scope: Business logic, state management

## Entrypoints

Type exports and factory functions for data creation

## Dependencies

Pure TypeScript types only