History and flag
This term was coined by FANDOM user Ariathatsme on May 26, 2021 as an addition to the Tavaline System. The flag was designed on the same date by the same user and the meaning is as follows: red/pink for emotional connection, grey for being unfinished or not ready, and green for keeping and cards.
This term, however, was coined by a harmful user who faked systemhood, manipulated users, was exclusionist, and was endophobic. Because of this, people may be hesitant using this term, however it may be used in a reclaiming manner.
Etymology
The word kiri is Estonian for "letter".