Free Lesson
Build Unique UI Components with AI Agents
45 min
Oct 21, 2026 12:00 PM
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What you'll learn
One sentence vs. seven paragraphs, same model
One line gave a flat, generic engine. A seven-paragraph brief gave a 60-fps 3D scene. The brief made the difference.
The anatomy of a brief that works
Format, stack and palette, the subject and its mechanics, modes and cameras, layout, API, and an acceptance check.
Checks the agent cannot do itself
Console errors, 60 fps, layout at three sizes, and the checklist that gets a component through 21st.dev review.
Why this topic matters
Part 2 of 3, Design with AI Agents free series · 100 live seats, no public replay. Same model, two prompts: one sentence gives a flat, generic engine, seven paragraphs give a 60-fps 3D scene. I open the brief that built the machine 12,000 people spun on 21st.dev in a day, run it live, and show the checks the agent cannot do itself, plus the checklist that gets a component through 21st.dev review.
