The Agentic Developer Cookbook

You're building a file browser panel. You open Claude Code and just start describing what you want — lazy loading, git status badges, ignore patterns. That's it. That's all you say.

Before a single line of code is written, Claude reads 27 engineering principles, walks you through a guideline checklist — accessibility, keyboard navigation, progress indicators — and finds a recipe that already specifies everything: selection behavior, keyboard shortcuts, empty states, platform-specific appearance across Swift, Kotlin, TypeScript, and C#. All the things you would have eventually gotten around to thinking about. Already thought about.

You approve it. Implementation begins in three phases — make it work, make it right, make it fast. No shortcuts, no "we'll add accessibility later." When it's done, the guideline checklist is green, the recipe is fully satisfied, and the tests pass. The file browser your users deserve, not the file browser you would have settled for.

You didn't have to remember any of it. That's the cookbook.