***
title: SchemaUtils
slug: /reference/typescript/agents/configuration/schema-utils
description: SWML document validation against structural rules with an LRU-style result cache.
max-toc-depth: 3
---------------------
For a complete index of all SignalWire documentation pages, fetch https://signalwire.com/docs/llms.txt
`SchemaUtils` validates SWML documents against structural rules and provides
schema-driven verb extraction and validation. Results are cached with an
LRU-style eviction policy. Set `SWML_SKIP_SCHEMA_VALIDATION=true` to disable
validation globally.
```typescript {3}
import { SchemaUtils } from '@signalwire/sdk';
const schema = new SchemaUtils();
const result = schema.validate(swmlDocument);
console.log(result.valid, result.errors);
```
## **Constructor**
Optional constructor configuration.
Skip all validation checks. When omitted, defaults to `true` if the
`SWML_SKIP_SCHEMA_VALIDATION` environment variable is `"true"`, otherwise `false`.
Maximum number of cached validation results before LRU eviction.
## **Methods**
Get all verb names defined in the SWML schema.
Get the inner properties schema for a specific verb.
Get the required properties for a verb.
Get the description text for a verb.
Check if a verb name exists in the schema.
Lightweight validation of a verb config against the schema.
Validate a SWML document against structural rules.
Clear the validation result cache.
Get the number of cached validation results.
## **Example**
```typescript {3,5-9}
import { SchemaUtils } from '@signalwire/sdk';
const schema = new SchemaUtils();
// Validate a SWML document
const result = schema.validate({
version: '1.0.0',
sections: { main: [{ answer: {} }, { hangup: {} }] },
});
console.log(result.valid); // true
console.log(result.errors); // []
```