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---
title: Panoramica
description: TypeScript lato server che viene eseguito all'interno di Twenty — attivato da route HTTP, pianificazioni cron, eventi del database, strumenti di AI o azioni di workflow.
icon: bolt
---
Il **livello logico** di un'app Twenty è il codice che *viene eseguito* — handler TypeScript lato server che reagiscono a richieste HTTP, pianificazioni cron e modifiche ai record; skill e agenti di AI che vivono all'interno dello spazio di lavoro; e connessioni OAuth che permettono alle tue funzioni di agire per conto dell'utente in servizi di terze parti.
```text
┌─ HTTP route ──┐
│ Cron schedule │
│ Database event │ ┌────────────────────┐
triggers ─┤ AI tool call ├─────▶│ Logic function │
│ Workflow action │ │ (your handler) │
│ Manual exec │ └────────────────────┘
└────────────────────┘ │
▼
┌────────────────────────────┐
│ Twenty API (records) │
│ Third-party API │
│ (via Connection token) │
└────────────────────────────┘
```
## In questa sezione
<CardGroup cols={2}>
<Card title="Funzioni logiche" icon="bolt" href="/l/it/developers/extend/apps/logic/logic-functions">
Il blocco di base — tipi di trigger, payload e client API tipizzato.
</Card>
<Card title="Skill e agenti" icon="robot" href="/l/it/developers/extend/apps/logic/skills-and-agents">
Istruzioni riutilizzabili per agenti AI e assistenti con prompt di sistema personalizzati.
</Card>
<Card title="Connessioni" icon="plug" href="/l/it/developers/extend/apps/logic/connections">
Credenziali OAuth che la tua app detiene per servizi di terze parti — Linear, GitHub, Slack e altri.
</Card>
<Card title="Archivio chiave-valore" icon="database" href="/l/it/developers/extend/apps/logic/key-value-store">
Mantieni lo stato tra le esecuzioni delle funzioni di logica — cache, cursori e asserzioni tra spazi di lavoro.
</Card>
<Card title="Job in background" icon="layer-group" href="/l/it/developers/extend/apps/logic/background-jobs">
Metti in coda l’esecuzione di una funzione di logica sui worker per superare il timeout per esecuzione.
</Card>
</CardGroup>
## Tipi di trigger in sintesi
Una funzione logica sceglie uno o più trigger — ogni voce qui sotto è un campo separato su `defineLogicFunction()`:
| Scatenante | Quando viene eseguito | Impostazione |
| ----------------------- | --------------------------------------------------------------------- | ------------------------------- |
| **Route HTTP** | Una richiesta raggiunge il tuo endpoint `/s/\<path>` | `httpRouteTriggerSettings` |
| **Cron** | Viene soddisfatta un'espressione CRON | `cronTriggerSettings` |
| **Evento database** | Un record dello spazio di lavoro viene creato, aggiornato o eliminato | `databaseEventTriggerSettings` |
| **Strumento AI** | Una funzionalità AI di Twenty decide di chiamare la tua funzione | `toolTriggerSettings` |
| **Azione del workflow** | Uno step di workflow richiama la tua funzione | `workflowActionTriggerSettings` |
Le funzioni vengono eseguite in sandbox in processi Node.js isolati e accedono allo spazio di lavoro tramite un client API tipizzato, limitato al ruolo dichiarato su [`defineApplication()`](/l/it/developers/extend/apps/config/application).
<Note>
**Hook di installazione** — codice che viene eseguito prima o dopo l'installazione — condividono questo runtime ma usano le proprie funzioni define e risiedono in [Config → Install Hooks](/l/it/developers/extend/apps/config/install-hooks).
</Note>