Type Alias: ExecutionResult<T>

type ExecutionResult<T> = 
  | {
  data: T;
  ok: true;
}
  | {
  message: string;
  ok: false;
  status: number;
};

Discriminated union for plugin execution results.

Replaces the previous T | undefined return type on execute().

On failure, the HTTP status code is preserved from:

• AppKitError subclasses (via statusCode)
• Any Error with a numeric statusCode property (e.g. ApiError)
• All other errors default to status 500

In production, error messages from non-AppKitError sources are handled as:

• 4xx errors: original message is preserved (client-facing by design)
• 5xx errors: replaced with "Server error" to prevent information leakage

Type Parameters