Is there a way to use reposition while carrying a sword and a shield? Nimble Shield hand was a thought, but I don't think Reposition would be considered and interaction.
Use Sleek Reposition with a finesse sword.
Use Guiding Riposte.
A 1-hand weapon with the Reposition trait.
Once those exist...
Is there a way to use reposition while carrying a sword and a shield? Nimble Shield hand was a thought, but I don't think Reposition would be considered and interaction.
With the items and rules printed so far, you need either Sleek Reposition or Guiding Riposte, like graystone pointed out.
If you really want to you could ask your GM to add Reposition to the list of traits you can choose with Shield Augmentation. Trip and Shove are already options and Reposition isn't more powerful than those.