tagbar-markdown is a tagbar extension for markdown.

• vim-plug

Plug 'majutsushi/tagbar'
Plug 'lvht/tagbar-markdown'

• Use dein.vim to lazy load plugin, and check the requirements.

call dein#add('', {'on_cmd' : 'TagbarToggle'})
call dein#add('', {'on_ft' : 'markdown', 'if' : executable('php')})

Please make sure php is in your $PATH and the bin/mdctags has execute permission.

execute ':MDAgenda' to insert content agenda in the current line.

Enjoy :)