Building an app from a Build Kit

Picking up where the previous video left off, this one shows the hands-on building process using a Build Kit. I take the Bookmark Manager kit into a Rails code base, run Milestone 1 through Claude Code in plan mode, answer the clarifying questions that shape the implementation, and verify the working app in the browser. Then I show how to refine the result, clear context, and kick off Milestone 2 — the loop you'll repeat until your app is built.

What's in this video:

  • Copying the Milestone 1 prompt into Claude Code and using plan mode
  • Answering clarifying questions to lock in product decisions (and asking Claude to explain technical options)
  • Reviewing the generated plan, running the build, and checking the milestone log
  • Testing the app locally and requesting refinements (like fixing the design system colors)
  • Clearing context and moving cleanly from Milestone 1 into Milestone 2
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