# Summary
- Introduces a new, flexible folder structure for Twenty SDK
applications using file suffix-based entity detection
- Adds defineApp, defineFunction, defineObject, and defineRole helper
functions with built-in validation
- Refactors manifest loading to use jiti runtime evaluation for
TypeScript config files
- Separates validation logic into dedicated module with comprehensive
error reporting
# New Application Folder Structure
Applications now use a convention-over-configuration approach where
entities are detected by their file suffix, allowing flexible
organization within the src/app/ folder.
# Required Structure
my-app/
├── package.json
├── yarn.lock
└── src/
├── app/
│ └── application.config.ts # Required - main application configuration
└── utils/ # Optional - handler implementations & utilities
# Entity Detection by File Suffix
- *.object.ts - Custom object definitions
- *.function.ts - Serverless function definitions
- *.role.ts - Role definitions
# Supported Folder Organizations
## Traditional (by type):
src/app/
├── application.config.ts
├── objects/
│ └── postCard.object.ts
├── functions/
│ └── createPostCard.function.ts
└── roles/
└── admin.role.ts
## Feature-based:
src/app/
├── application.config.ts
└── post-card/
├── postCard.object.ts
├── createPostCard.function.ts
└── postCardAdmin.role.ts
## Flat:
src/app/
├── application.config.ts
├── postCard.object.ts
├── createPostCard.function.ts
└── admin.role.ts
# New Helper Functions
## defineApp(config)
import { defineApp } from 'twenty-sdk';
export default defineApp({
universalIdentifier: '4ec0391d-...',
displayName: 'My App',
description: 'App description',
icon: 'IconWorld',
});
## defineObject(config)
import { defineObject, FieldType } from 'twenty-sdk';
export default defineObject({
universalIdentifier: '54b589ca-...',
nameSingular: 'postCard',
namePlural: 'postCards',
labelSingular: 'Post Card',
labelPlural: 'Post Cards',
icon: 'IconMail',
fields: [
{
universalIdentifier: '58a0a314-...',
type: FieldType.TEXT,
name: 'content',
label: 'Content',
},
],
});
## defineFunction(config)
import { defineFunction } from 'twenty-sdk';
import { myHandler } from '../utils/my-handler';
export default defineFunction({
universalIdentifier: 'e56d363b-...',
name: 'My Function',
handler: myHandler,
triggers: [
{
universalIdentifier: 'c9f84c8d-...',
type: 'route',
path: '/my-route',
httpMethod: 'POST',
},
],
});
## defineRole(config)
import { defineRole, PermissionFlag } from 'twenty-sdk';
export default defineRole({
universalIdentifier: 'b648f87b-...',
label: 'App User',
objectPermissions: [
{
objectNameSingular: 'postCard',
canReadObjectRecords: true,
},
],
permissionFlags: [PermissionFlag.UPLOAD_FILE],
});
# Test plan
- Verify npx twenty app sync works with new folder structure
- Verify npx twenty app dev works with new folder structure
- Verify validation errors display correctly for invalid configs
- Verify all three folder organization styles work (traditional,
feature-based, flat)
- Run existing E2E tests to ensure backward compatibility
The #1 Open-Source CRM
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Installation
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Does the world need another CRM?
We built Twenty for three reasons:
CRMs are too expensive, and users are trapped. Companies use locked-in customer data to hike prices. It shouldn't be that way.
A fresh start is required to build a better experience. We can learn from past mistakes and craft a cohesive experience inspired by new UX patterns from tools like Notion, Airtable or Linear.
We believe in Open-source and community. Hundreds of developers are already building Twenty together. Once we have plugin capabilities, a whole ecosystem will grow around it.
What You Can Do With Twenty
Please feel free to flag any specific needs you have by creating an issue.
Below are a few features we have implemented to date:
- Personalize layouts with filters, sort, group by, kanban and table views
- Customize your objects and fields
- Create and manage permissions with custom roles
- Automate workflow with triggers and actions
- Emails, calendar events, files, and more
Personalize layouts with filters, sort, group by, kanban and table views
Customize your objects and fields
Create and manage permissions with custom roles
Automate workflow with triggers and actions
Emails, calendar events, files, and more
Stack
- TypeScript
- Nx
- NestJS, with BullMQ, PostgreSQL, Redis
- React, with Recoil, Emotion and Lingui
Thanks
Thanks to these amazing services that we use and recommend for UI testing (Chromatic), code review (Greptile), catching bugs (Sentry) and translating (Crowdin).
Join the Community
- Star the repo
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- Follow us on Twitter or LinkedIn
- Join our Discord
- Improve translations on Crowdin
- Contributions are, of course, most welcome!




