I have no experience writing ESO addons, but I do develop WPF apps at work, so I have been thinking about developing an addon that helps me sort through the hundreds of recipes sold at guild vendors to find the one I want to buy. I have two ideas. One is to search through the available recipes for a matching string. The other is to return just the first recipe on the list with a given name, which would have the effect of providing only the cheapest instance of every recipe sold at a vendor.
I have two questions.
1.) Does such an addon already exist?
2.) Does the API for addons allow a modification/replacement of the guild vendor interface?