Decorator Errors

Errors for invalid decorator metadata and hook target definitions.

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"

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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"