skip phases; it compresses some and surfaces others. UNDERSTAND Read requirements, clarify with stakeholders, model the domain. Slow. Often skipped. Always regretted when skipped. DESIGN Architecture decisions, data modelling, interface contracts. Whiteboard sessions and long async threads in Notion. IMPLEMENT Write code. Most of the calendar. Most of the pull requests. The phase everyone optimises for. TEST Write tests after the fact. Often skipped under deadline pressure. Technical debt accrues silently. → → → → UNDERSTAND Spec first, code second. A precise prompt is the spec. Vague intent produces vague output, at 100× the speed. The thinking phase is now load-bearing. MORE CRITICAL DESIGN Modular, small-context architecture is now a prerequisite for the agent to work well. Good design is no longer optional; it's how you give the AI a fighting chance. MORE CRITICAL IMPLEMENT Claude Code handles boilerplate, scaffolding, repetition, and first-pass logic at speed. The phase that consumed most of the calendar now takes a fraction of it. ACCELERATED TEST AI-generated code has no fear of being wrong; only you can verify correctness. Tests written before implementation are now your primary control mechanism. MORE CRITICAL 17 / 45