Build garage · 3 min
A/B split
Test or ship direct — pick the right release move.
Practice: 0 XP · 0d streak — clever clears earn up to ★★★.
Decision drill
A/B test lab
Split traffic and measure quality — not every change needs an experiment, but behavior shifts do.
Experiment rigor71%
1/3New system prompt — 50/50 traffic.