claude code just shipped /ultraplan. the speed isn't the interesting part. in under 5 minutes you'll learn: 1. how 4 opus agents plan your project in parallel (3 explorers + 1 critic) 2. why the review workflow matters more than the 4x speed boost 3. 5 scenarios where ultraplan https://t.co/F8ngvv6IGE https://t.co/4olVxnZdjx