Get a guest list out of a spreadsheet

Nobody types two hundred guests. The scenarios exist because of it, and they are the only way into this product that is not the slide-over, thirteen fields at a time, two hundred times.

A real couple has a spreadsheet. Or a list in a document, or something an aunt emailed. It has the names and some of the rest, in whatever shape the person who made it felt like.

What makes it interesting

KB-3 has thirteen fields and two of them are reciprocal. A spreadsheet has columns somebody invented on a Tuesday. Getting from one to the other is guesswork, and the guessing has to be visible: a guest list quietly imported wrong is worse than one that refused to import, because nobody checks two hundred rows.

Worth having an answer to before you start. What becomes of a column nobody can map. How a partner or a conflict written as a name becomes an id, and what happens when that name matches two people or none. How somebody is shown what was guessed as against what was read.

The criteria are yours

There are none in this ticket on purpose. Plan it with the planner first, against KB-3, and bring the criteria back before you write anything.