So a different or additional motion with the weapon is required for the component, then touch the foe?
I apologize for the misuse of "deliver", I didn't mean to imply that the harm spell was stored. The intention was to fulfill the somatic component of harm by hitting a foe with the weapon as the first action in the round, effectively hitting with the sword and casting at the same time.
I suppose by action mechanics the spell casting action and the striking action would still be separate actions. The spell can't become a 0-cost action, right?