!:
|_  gas=epic
::
++  get-path  
  ^-  path
  (tope bem.gas(s (welp but.gas /pub)))
::
++  get-parent
  ^-  path
  (tope bem.gas(s (welp (slag 1 but.gas) /pub)))
::
++  get-tree  
  ^-  arch
  ((hard arch) .^(%cy get-path))
++  kids-json
  |=  kids=(list ,@ta)
  :-  %a
    %+  turn  kids
  |=  kid=@t  [%s kid]
++  bread-json
  |=  kids=(list path)
  :-  %a
    %+  turn  kids
  |=  kid=path  [%s (spat (flop kid))]
++  parent-json
  |=  pare=path  [%s (spat (slag 3 pare))]
++  get-kids
  %-  sort  :_  aor
  ^-  (list span)
  %+  murn  (~(tap by r:get-tree))
  =+  pax=get-path
  |=  [kid=span ~]  ^-  (unit span)
  =+  ark=;;(arch .^(%cy (welp pax /[kid])))
  ?~  r.ark  ~
  (some kid)
++  get-link
  |=  [pax=path mal=marl]  
  ^-  manx
  =+  rut=`path`[q.bem.gas (flop (slag 1 s.bem.gas))]
  ;a/"/gen{<rut>}{<(slag 4 pax)>}":"*{mal}"
++  get-down
  ^-  marl
  %+  turn  get-kids
  |=  a=span
  ;span:  +{(get-link (welp get-path /[a]) ;"{(trip a)}")}
++  render-bread
  |=  a=path
  ^-  manx
  ;span: /+{(get-link (tope bem.gas(s a)) ;"{(trip (snag 0 a))}")}
::
++  get-bread
  =+  [pax=`path`/pub paf=(flop but.gas)]
  |-  ^-  (list path)
  ?~  paf  ~[pax]
  [pax $(paf t.paf, pax [i.paf pax])]
--