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56 lines
3.6 KiB
Plaintext
56 lines
3.6 KiB
Plaintext
---
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title: Overview
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description: Server-side TypeScript that runs inside Twenty — triggered by HTTP routes, cron schedules, database events, AI tools, or workflow actions.
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icon: bolt
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---
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A Twenty app's **logic layer** is the code that *runs* — server-side TypeScript handlers reacting to HTTP requests, cron schedules, and record changes; AI skills and agents that live inside the workspace; and OAuth connections that let your functions act on a user's behalf in third-party services.
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```text
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┌─ HTTP route ──┐
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│ Cron schedule │
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│ Database event │ ┌────────────────────┐
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triggers ─┤ AI tool call ├─────▶│ Logic function │
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│ Workflow action │ │ (your handler) │
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│ Manual exec │ └────────────────────┘
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└────────────────────┘ │
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▼
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┌────────────────────────────┐
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│ Twenty API (records) │
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│ Third-party API │
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│ (via Connection token) │
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└────────────────────────────┘
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```
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## In this section
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<CardGroup cols={2}>
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<Card title="Logic Functions" icon="bolt" href="/l/ru/developers/extend/apps/logic/logic-functions">
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The core building block — trigger types, payloads, and the typed API client.
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</Card>
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<Card title="Skills & Agents" icon="robot" href="/l/ru/developers/extend/apps/logic/skills-and-agents">
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Reusable AI agent instructions and assistants with custom system prompts.
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</Card>
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<Card title="Connections" icon="plug" href="/l/ru/developers/extend/apps/logic/connections">
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OAuth credentials your app holds for third-party services — Linear, GitHub, Slack, and more.
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</Card>
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</CardGroup>
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## Trigger types at a glance
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A logic function picks one or more triggers — every entry below is a separate field on `defineLogicFunction()`:
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| Trigger | When it runs | Setting |
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| ------------------- | ---------------------------------------------------------- | ------------------------------- |
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| **HTTP route** | A request hits your `/s/\<path>` endpoint | `httpRouteTriggerSettings` |
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| **Cron** | A CRON expression matches | `cronTriggerSettings` |
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| **Database event** | A workspace record is created, updated, or deleted | `databaseEventTriggerSettings` |
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| **AI tool** | A Twenty AI feature decides to call your function | `toolTriggerSettings` |
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| **Workflow action** | A workflow step invokes your function | `workflowActionTriggerSettings` |
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Functions run sandboxed in isolated Node.js processes and access the workspace through a typed API client scoped to the role declared on [`defineApplication()`](/l/ru/developers/extend/apps/config/application).
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<Note>
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**Install-time hooks** — code that runs before or after the install — share this runtime but use their own define functions and live under [Config → Install Hooks](/l/ru/developers/extend/apps/config/install-hooks).
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</Note>
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