"r.s.v.p." is an abbreviation often used in invitations to events. It is formed from the initial letters of a French phrase that translates as "please reply" (Répondez s'il vous plaît). Because in English only the initials are commonly used, the four letters themselves are often treated as a verb, "to rsvp". Thus in your example "you rsvpd" means "you replied". You might also come across other examples such "when you will you rsvp?" "Don't forget to rsvp", etc.