PoC builder brief

From Proof of Concepts with AI - free, no signup needed.

Build a minimal working HTML prototype for a stakeholder demo.
Idea: [describe in 2 lines].
Constraints: single file, inline CSS, no build step, mobile-friendly, realistic copy.
Include 1 happy path + 1 edge case. Output the full HTML.

How to use it well

1. Replace every [BRACKETED] placeholder - vague inputs produce vague outputs.
2. Add your role and constraints at the top if your assistant does not already know them.
3. Critique the first answer explicitly (“too generic because…”) and ask for a second pass.
4. Save the version that worked into a project or system prompt so you never retype it.