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Documentation Index

Fetch the complete documentation index at: https://docs.get-clara.tech/llms.txt

Use this file to discover all available pages before exploring further.

Twenty apps are TypeScript packages that extend your workspace with custom objects, logic, UI components, and AI capabilities. They run on the Twenty platform with full sandboxing and permission controls.

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How apps work

An app is a collection of entities declared using defineEntity() functions from the twenty-sdk package. The SDK detects these declarations via AST analysis at build time and produces a manifest — a complete description of what your app adds to a workspace. 
your-app/
├── src/
│   ├── application-config.ts    ← defineApplication (required, one per app)
│   ├── roles/                   ← defineRole
│   ├── objects/                 ← defineObject
│   ├── fields/                  ← defineField
│   ├── logic-functions/         ← defineLogicFunction
│   ├── front-components/        ← defineFrontComponent
│   ├── skills/                  ← defineSkill
│   ├── agents/                  ← defineAgent
│   ├── views/                   ← defineView
│   ├── navigation-menu-items/   ← defineNavigationMenuItem
│   └── page-layouts/            ← definePageLayout
├── public/                      ← Static assets (images, icons)
└── package.json
File organization is up to you. Entity detection is AST-based — the SDK finds export default defineEntity(...) calls regardless of where the file lives. The folder structure above is a convention, not a requirement.

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Entity types

实体目的文档
ApplicationApp identity, permissions, variablesData Model
RolePermission sets for objects and fieldsData Model
对象Custom data tables with fieldsData Model
字段Extend existing objects, define relationsData Model
Logic FunctionServer-side TypeScript with triggersLogic Functions
Front ComponentSandboxed React UI in Twenty’s pageFront Components
SkillReusable AI agent instructionsSkills & Agents
AgentAI assistants with custom promptsSkills & Agents
ViewPre-configured record list viewsLayout
Navigation Menu ItemCustom sidebar entriesLayout
Page LayoutCustom record page tabs and widgetsLayout

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Sandboxing

  • Logic functions run in isolated Node.js processes on the server. They only access data through the typed API client, scoped to the app’s role permissions.
  • Front components run in Web Workers using Remote DOM — sandboxed from the main page but rendering native DOM elements (not iframes). They communicate with Twenty via a message-passing host API.
  • Permissions are enforced at the API level. The runtime token (TWENTY_APP_ACCESS_TOKEN) is derived from the role defined in defineApplication().

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App lifecycle

┌─────────────────────────────────────────────────────────┐
│ Development                                             │
│   npx create-twenty-app → yarn twenty dev (live sync)   │
├─────────────────────────────────────────────────────────┤
│ Build & Deploy                                          │
│   yarn twenty build → yarn twenty deploy                │
├─────────────────────────────────────────────────────────┤
│ Install flow                                            │
│   upload → [pre-install] → metadata migration →         │
│   generate SDK → [post-install]                         │
├─────────────────────────────────────────────────────────┤
│ Publish                                                 │
│   npm publish → appears in Twenty marketplace           │
└─────────────────────────────────────────────────────────┘
  • yarn twenty dev — watches your source files and live-syncs changes to a connected Twenty server. The typed API client is regenerated automatically when the schema changes.
  • yarn twenty build — compiles TypeScript, bundles logic functions and front components with esbuild, and produces a manifest.
  • Pre/post-install hooks — optional logic functions that run during installation. See Logic Functions for details.

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Next steps

数据模型

Define objects, fields, roles, and relations.

逻辑函数

Server-side functions with HTTP, cron, and event triggers.

前端组件

Sandboxed React components inside Twenty’s UI.

布局

Views, navigation items, and record page layouts.

技能与智能体

AI skills and agents with custom prompts.

CLI & Testing

CLI commands, testing, assets, remotes, and CI.

发布

Deploy to a server or publish to the marketplace.