Kacam.net

Product design

为什么是现在

五年前有人能做这件事吗?如果不能,是什么变了?

Copy the prompt, then pick a model. It plays the interviewer and asks you through it scene by scene instead of handing you the answer.

On a phone with the app installed, the system opens the app directly. Links cannot open external apps inside WeChat — open it in a browser first.

The copied text ends with the answer key the model grades you against. Don't read it yourself first — working it out on your own is the point.

「AI 火了」「这是大趋势」会被当场打断:那是背景,不是理由。具体哪一件事变了,什么时候变的? 趋势是所有人共享的东西,不构成你的理由。

第二幕去找尸体:以前做过这件事的人死在哪一步,而让他们死掉的那个原因今天变了没有。这是这一份最重要的一问 —— 没变的话,你凭什么不重蹈覆辙。

还有一问值得先想想:那个变化再往前走一步,你的产品是更被需要,还是干脆不需要了。

边界:它不预测这个点子能不能成,也不替你决定做不做。

★★★★☆ · about 35 min · Tests: 带年份和数字的具体变化、前人死在哪、变化够不够大、太早的症状

What this one tests

Framing the real problem Evidence and numbers

Have you done this one?

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Notes from people who did this one

Nobody has written yet. After you run it, say what came out of the conversation — which scene stumped you, which conclusion you changed afterwards.

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How to use this

There is no model answer here — but there are definite wrong answers. Only three things make a case hold up, and every prompt's answer key carries a "common wrong answers" section that is more useful than the checklist itself.

The three things that make it hold up

  1. You can say whose problem this is and what it is — **with evidence** (not "I think users would want it")
  2. You can say what success looks like — **and what that number is today** (no baseline, no acceptance criteria)
  3. You can name the cost and what you gave up — **the hardest one to fake**, which is why every prompt hunts for it

How to start

  1. Pick a question, open it, copy the prompt.
  2. Paste it into a brand-new conversation — not one where you already discussed it.
  3. Say nothing. Wait for its first question.

Four commands you can call out at any time

  • 跳过 move to the next scene now
  • 提示 give a direction, not the answer
  • 直说吧 spell this point out in full, then keep pressing on the trade-offs
  • 复盘 jump to the wrap-up and print the review card

Three traps

  • Don't rush to a solution. More than half the lost points here come from designing before asking — especially describing features before defining what success means.
  • Expect to be pushed for numbers. "It'll perform better", "users will like it" get cut off: which metric, what is it today, and when do you look?
  • When it starts praising you, point it back to rule five — feeling validated crowds out noticing what you missed.

Start with the north star metric; it underpins everything else. Then pick by what's on your plate: a backlog you can't order → prioritisation; nobody using it or retention sliding → retention and onboarding; need to price something → pricing. Save the experiment review for later, and keep redoing the one about turning a one-line request into a spec — it's the closest to daily work.