Build garage · 3 min
Blue-green swap
Swap, hold, or revert on the deploy desk.
Practice: 0 XP · 0d streak — clever clears earn up to ★★★.
Decision drill
Blue-green deploy desk
Two full environments — swap traffic atomically, revert fast if metrics break.
Cutover confidence70%
1/3v2 passes smoke on the idle (blue) environment. Green still serves 100%.