Product
Strategy & architecture
Goal, shape and system boundaries
Sharpens value and architecture without claiming working implementation ahead of evidence.
Build
Implementation engineering
Build in isolation and prove it
Changes explicitly claimed files, runs proportionate checks and produces a reviewable state.
Review
Review & quality
Challenge independently
Reviews the exact same Git state adversarially for defects, contradictions, security and regressions.
Experience
Design & research
Clarity and assumptions
Designs interaction, checks accessibility and surfaces uncertain product assumptions early.