Postcard App — Twenty App Example

A rich example app showcasing all Twenty app entity types. Use this as a reference when building your own apps.

What's included

This app demonstrates every entity type available in the Twenty SDK:

Entity	Files	What it shows
Application	`src/application.config.ts`	App metadata, application variables, server variables
Objects	`src/objects/`	Custom objects with inline fields, junction tables
Fields	`src/fields/`	Standalone fields, relations (ONE_TO_MANY, MANY_TO_ONE), extending standard objects
Logic Functions	`src/logic-functions/`	HTTP routes, database event triggers, cron schedules, tool functions, install hooks
Front Components	`src/components/`	React components rendered inside Twenty's UI
Roles	`src/roles/`	Permission roles with object and field-level access control
Views	`src/views/`	Saved table views with column configuration
Navigation	`src/navigation-menu-items/`	Sidebar links targeting views
Skills	`src/skills/`	AI skill providing context to agents
Agents	`src/agents/`	AI agent with a system prompt
Page Layouts	`src/page-layouts/`	Custom record page with a front component widget

bash

# From this directory
yarn install
yarn twenty dev

Or use it as a template via create-twenty-app:

bash

npx create-twenty-app@latest my-app --example postcard