• Prompt 19 · Fix a booked slotChapter 9

  There is a problem. When I open the booking page on two phones and choose the same slot, both bookings go through.
  
  I expected the second person to see a message saying the slot has just been taken, and to be offered the next free slots.
  
  Fix only this. Do not change the design or any other behaviour. Then tell me exactly how to repeat my test to confirm it is fixed.

  The problem Two parents booked the same slot. One tight prompt fixes it without breaking anything else.

• Prompt 21 · Payment in test modeChapter 9

  Add a £10 deposit payment using a hosted checkout from an established payment provider. Use the provider's TEST mode only.
  
  - The parent is sent to the provider's own payment page. Do not collect or store card details on our pages.
  - A booking is marked as paid only when the provider confirms the payment.
  - If the payment fails or is cancelled, the slot must be released.
  
  Do NOT ask me to paste any secret key into this chat.

  The rule Priya adds a £10 deposit, and tells the builder how a payment counts as paid.

• Prompt 25 · Who can see whatChapter 10

  Here is who should be able to see and change each kind of data in my product:
  [YOUR "WHO CAN SEE WHAT" LIST]
  
  Check the current project against this list. For every table, tell me in plain English who can read it now, who can change it, and where that differs from my list.
  
  Then give me steps to prove, with a second account, that one customer cannot see another's data. Do not make any changes yet.

  The safety check Before launch, Priya asks the assistant to check access rules against her own list.

• Prompt 29 · Break it on purposeChapter 11

  Act as a hostile but legal tester. Here is my spec and who should be able to do what:
  [YOUR SPEC]
  
  List 15 ways a careless or mischievous person might misuse it or make it fail. For each, tell me in plain English how I can check it using only a browser.
  
  Do not give me instructions for attacking anyone else's system.

  The stress test The assistant plays a hostile but legal tester, and Priya checks each case by hand.

• Prompt 40 · Outreach messageChapter 17

  Write a short, friendly message to a person I interviewed about [PROBLEM]. I have now built [PRODUCT] and want them as one of my first customers.
  
  - Under 100 words, plain English.
  - Refer to something specific they told me: [QUOTE].
  - State the price: [PRICE AND TERMS].
  - Ask one clear question.
  - Do not use hype, pressure or false urgency.

  The first customers A personal note to someone she interviewed, with no hype and one clear question.

Real prompts from the book. Brackets are where you add your own details.