Three sports, not one
Real archetypes for swim (CSS, technique), bike (power, sweet-spot) and run (VDOT, threshold). Each discipline in its own zone — no mixing.
Triathlon
Your tri plan, with bricks.
Vetta splits the week across the three sports + one brick day (bike → run). Each sport has its own zones (CSS in the pool, % FTP on the bike, VDOT on the run) and the engine coordinates them.
Brick programmed
The key session is the brick (bike → run): the engine places it in the week and gives it weight. Quality on the other two sports lands on different days.
IM or Olympic periodization
Olympic, Half or Ironman. The week falls into the right phase: aerobic base → distance-specific → race taper.
Classic triathlon philosophy
30/40/30 split across the three sports, adjustable. The engine respects your gear (pool access? indoor trainer? road bike?) before prescribing.