RSVP By - a stamp sheet for party invites guests can act on

Throwing a Halloween party, a Friendsgiving, a birthday dinner or a watch party? Fill a sheet of twelve postage stamps - date, start time, wraps up, where, getting in, hosted by, food and drinks, bring, wear, plus-ones, kids, RSVP by. The page catches hard clashes for free (an end before the start, a reply-by after the party, a weekday the date doesn't have) and gives a verdict by fixed rules: clash, gaps or ready. A metered read writes the invite in your vibe from the stamps only, says what each blank stamp will make guests text you, drafts a day-before reminder and answers likely guest questions. Exports Markdown, JSON and a calendar file. Built on @suzheng/k2f-invitation.