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Build It Yourself: Prototyping & Technical Fluency1 / 3

2 min lesson

What 'good' looks like at the end

Take this situation: "After your timed rep, what four artifacts should you walk away holding - and why each one?" Lead with your decision, then add the reason.

Step 1 of 3

What 'good' looks like at the endthe artifacts you should hold

A running slice

One end-to-end path a user can click.

Edges faked, not faked-out - the demo never breaks.

A two-minute demo

Opens with the problem in one line.

Shows the user reaching the result, not a tour of code.

A measurement plan

One primary metric tied to daily use.

Guardrails and a staged rollout you can name.

A tradeoffs story

What you cut and why.

What you'd build next and what would change your mind.

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Full explanation

A demo-script skeleton - fill it for your chosen Cursor gap

A demo-script skeleton - fill it for your chosen Cursor gap
Problem (1 line): <who hurts, when>
Demo path:
  1. user does <action>
  2. feature shows <result>  # the moment that lands
Faked for the demo: <what is hardcoded and why>
Primary metric: <activation | retention | keep-rate>
Guardrails: <latency | undo-rate | trust>
Next: <the one thing you'd build after the slice>
Say it like this

“I noticed that when Agent edits five files, you can't tell at a glance which change matters most. I built a slice that ranks the edits by blast radiusHow much breaks if a change goes wrong; the scope of potential damage. Press Enter for the full definition. so you review the risky one first. It's faked past the top file, but here's the path. I'd measure it on review-completion time and watch undo rate as a guardrail.”

Before you call the rep done

Can you run the demo cold, on a fresh machine, in under two minutes without it breaking? Can you say the primary metric and the cut you made in one breath each? If not, the rep is not finished - that fluency is the whole point.