Overview

In one line: S4U treats the AI collaborator as a senior engineer under architectural supervision, with quality enforced by machinery you can run — not by discipline.

New here? Start with Why a Methodology for the problem it solves, then Verifiable Benefits to see each claim and how to reproduce it yourself.

This is the entry point to the full reference:

• Philosophy — the principles, each born from a specific failure mode.
• Development Lifecycle — the full cycle, the bug-fix cycle, the code-review cycle.
• The Machinery — the instruction hierarchy, the agent system, the memory system, and the quality gates that enforce it all.
• Standards & Practices — testing, UI/UX, ADRs, tooling, living documentation.
• Adopt It — bring the methodology into your own project.