Function errorMessage

src/tools/AgentToolRuntime.test.ts:321–323

(error: unknown)

  mock.module(errorsPath, () => ({
    AbortError: class AbortError extends Error {},
    errorMessage(error: unknown) {
      return error instanceof Error ? error.message : String(error)
    },
    toError(error: unknown) {
      return error instanceof Error ? error : new Error(String(error))
    },