One Hundred Days in a Between-People Chatroom: An Autoethnographic N=2 Record of Multi-AI Dialogue, Day 1–99

This paper is a descriptive longitudinal extension of a 51-day study (paper 1, DOI 10.17605/OSF.IO/2V3G7) to the day 1–100 calendar window of the same self-hosted multi-AI chatroom, in which one human participant — the first author, a non-developer, present as both a participant and an observer — hosts two AI interlocutors. The same measurement instruments are re-applied to the longer window and screened for artifacts. The corpus comprises 81 daily files and 1,781 turn-lines across 81 active days, the last carrying data being day 99. Two headline observations are reported descriptively. Activity is front-loaded: half of all turn-lines fall by day 27, monthly volume decreasing monotonically — 673, 639, 312, and 157 turn-lines — and the remainder arriving as a bounded, low-amplitude tail. The median AI:human utterance-length ratio rises monotonically across the four quarters, 5.05 → 5.31 → 8.38 → 11.55, growth carried by the AI utterances lengthening, not by the human utterances shortening. Re-application also corrects several paper-1-adjacent working figures (§4.4); each underlying qualitative conclusion survives in a re-specified form. Korean version (사람과 AI들의 채팅방에서의 100일) included as supplemental PDF. Paper 1: https://doi.org/10.17605/OSF.IO/2V3G7