Debugger for cmsis-dap / st-link

Have anyone experience with the atom-gdb-debugger ???
some guys from (see also their kickstarter campaign)
make a small stm32 board and developed a plugin for PlatformIO
and also a debugger extension for atom
Maybe that can be integrated in PlatformIO for mbed boards with cmsis-dap and st-link feature?
That is the big missing feature in pio.