Phonetic stress without creating new phonemes?

I am looking to use Shiro to label speech with the stresses in-place. Does Shiro have support for this without treating them as a unique phoneme?

If not then would it be ok to request this as a feature? Being able to do something like ah durfloor 0.4 aka ah0 aka ah1 as to not waste data but still output the stress in the final label would be very useful.

Thank you.