#GitHub Spec Kit

Spec Kit vs Kiro vs a Plain plan.md: The Spec-Driven Setup I Kept (2026 Field Log)

Quick answer (2026): I ran the same feature through GitHub Spec Kit, Kiro, and a plain plan.md in Claude Code to see which spec-driven setup actually earns its place. Spec Kit wins for writing shared project rules, Kiro wins for killing spec-and-code drift, and a hand-written plan.md wins on setup cost. The plain plan.md is the one I kept.