Decorator Errors

Overview

Decorator errors are thrown during class decoration when metadata validation fails or when hook targets reference methods that don’t exist. Both are internal errors that indicate a developer configuration issue.

Error Reference

InvalidDecoratorMetadataError

Thrown when a decorator (e.g., @App, @Plugin, @FrontMcp) receives invalid metadata for a specific field.

Property	Type	Value
`code`	`string`	`INVALID_DECORATOR_METADATA`
`statusCode`	`number`	`500`
`isPublic`	`boolean`	`false`

new InvalidDecoratorMetadataError(decoratorName: string, field: string, details: string)

Example:

import { InvalidDecoratorMetadataError } from '@frontmcp/sdk';

throw new InvalidDecoratorMetadataError('App', 'name', 'must be a non-empty string');
// "@App invalid metadata for "name": must be a non-empty string"

HookTargetNotDefinedError

Thrown when a hook references a target method that is not defined on the class.

Property	Type	Value
`code`	`string`	`HOOK_TARGET_NOT_DEFINED`
`statusCode`	`number`	`500`
`isPublic`	`boolean`	`false`

new HookTargetNotDefinedError(method: string)

Example:

import { HookTargetNotDefinedError } from '@frontmcp/sdk';

throw new HookTargetNotDefinedError('onBeforeExecute');
// "Hook target method "onBeforeExecute" is not defined"

Decorators

API

Errors

Overview

Error Reference

InvalidDecoratorMetadataError

HookTargetNotDefinedError

​Overview

​Error Reference

​InvalidDecoratorMetadataError

​HookTargetNotDefinedError

Overview

Error Reference

InvalidDecoratorMetadataError

HookTargetNotDefinedError