No itinerary for this one — just the lake promenade, the Temple of the Tooth, and the old streets behind the Clock Tower, walked slowly with no map.
Kandy rewards wandering more than most cities I've been to.
Start at the lake in the early morning while it's quiet, then work inward toward the temple as the day heats up.
The streets behind the Clock Tower are the least touristy part of the walk — that's where the good food stalls are.