How Anthropic Uses Claude Fable 5 With Mike Krieger

The gist

1. Krieger does architectural planning conversations with the model before jumping to implementation, then delegates overnight work and reviews completed features in the morning.
2. Verification loops using screenshots, videos, and real-world testing are essential because static tests alone miss issues like UI jank and edge cases.
3. A media tracker app that would have taken weeks of late-night coding took a weekend, but Krieger says cost discipline matters when choosing this model over cheaper options.
4. Ownership, architectural judgment, and production incident response stay with humans; the bottleneck has shifted from writing code to understanding intent and trade-offs.