Build a dues-checking tool with Lovable or Cursor

How to do it

1. 1

   Write acceptance criteria as rules, not a vision

   Don't write "make a nice expense app." Write the input format, the four statuses and that a bad row must not crash the page.

   Prompt

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   Build a single-page tool called "Event Dues Check." No login, no database, no payments. The user pastes text into a large text box, one row per line, in this format: name,owed,paid For example: Alex Kim,20,20 Sam Lee,20,8 When they press "Check," show a table with these columns: Name, owed, paid, status, still owed Status rules: - paid equals owed: Paid in full - paid less than owed: Not paid - paid more than owed: Overpaid - an amount isn't a number, or fewer than three fields: show "Format error" on that row; don't crash the page - name blank: show "Missing name" on that row The page is in English. Keep the visuals simple; the table must be readable on a phone. Add one line on the page: this is for internal event use; don't make a page with real names public.
2. 2

   Press Check once with four fake rows

   Never mind how it looks; test these four rows first: paid in full, not paid, blank name, amount written as a word. If any status is missing, paste that rule again and ask it to fix only that, not redo the visuals.

   Prompt

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   Fix only the checking rules. Don't change the visuals or add features. Accept it with these four rows; the results must be Paid in full, Not paid, Missing name and Format error: Alex Kim,20,20 Sam Lee,20,8 ,20,20 Jo Park,twenty,20 When an amount isn't a number, the other rows must not disappear.
3. 3

   Only consider new features after it passes

   Don't add accounts, PDF export or history right now. Those will keep you from finishing tonight.

4. 4

   Give the link only to people who handle the list

   Don't post the Lovable preview link, or your deployed link, on public social media and ask everyone to enter real names. Keep the reminder line on the page.