The CERN NP06/ENUBET experiment is designing the first ``monitored neutrino beam'', i.e. a neutrino beam with unprecedented control of the flux, energy, and flavor of the neutrinos at the source. The original aim of ENUBET was to monitor the $\nu_e$ production mostly by the detection of large-angle positrons from three-body semileptonic decays of kaons: $K^+ \rightarrow e^+ \pi^0 \nu_e$.
Over the years, the ENUBET technique has been extended to cover also the monitoring of the $\nu_\mu$ from kaon and pion decays. In this paper, we present these new developments and the overall status of the project.