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Turn a PRD into a working demo to test with users

A working full-stack demo of your PRD's core flow, testable in the browser before engineering starts.

Tuned for Bolt.new

First

Extract the demo scope rather than pasting the whole PRD; paste the build brief into Bolt.new.

The prompt

From this PRD, write a build brief for a prototype covering ONLY the
happy-path primary flow: the screens, the fields on each, and what each
button does. Skip metrics, edge cases, and non-goals.

[paste your PRD here]

Then build that flow as a working app. Use simple in-memory or lightweight
data. Build only the flow described — no extra features.
Built-in guardrail: Scopes the build to only the happy-path flow — no metrics, edge cases, non-goals, or extra features — so the builder can't wander or burn tokens.

Then

Walk the full flow against the PRD's acceptance criteria and, where the demo diverges, decide which is right — sometimes the demo reveals the PRD was wrong.

Field-tested Jul 21, 2026. If it stops working, tell us.