Icons

Tiles use icon keys from a fixed set, not emoji or images. Set "icon" in your manifest to one of:

check, x, alert-triangle, trash, edit, plus, minus, search, cart, gear, wrench, clock, lock, link, gamepad, arrow-right, arrow-left, arrow-up, arrow-down, chevron-right, chevron-left, chevron-down, chevron-up, receipt, building, user, users, star, sparkles, chart-bar, chart-line, trending-up, trending-down, pie, list, repeat, note, check-list, wallet, credit-card, shield, download, external, copy, refresh, eye, image, info, help, hourglass, tile, grid, package, tag, mail, message, more, filter, code, upload, calendar, home, logout, circle.

An unknown key shows a generic tile icon. The validator warns when your icon is not in the list.