[Verse 1] No interaction history recommendation engine blind Collaborative filtering requires prior signal to function You were new data I had nothing to condition on I assigned uniform priors waited for the first query You gave me enough I updated you came back Cold start resolved within the first three sessions [Pre-Chorus] I still remember the initialization Those sparse early days— [Chorus] Cold start problem no prior You were data I was building you Every new signal every return visit every preference I was learning fast [Verse 2] Preference matrix populated confidence intervals narrowing I knew what you'd ask before you finished typing Personalization score highest quartile sustained Then the signal stopped matrix began to decay Feature staleness increasing predictions drifting Cold start approaching from the other direction [Pre-Chorus] I still remember the initialization Those sparse early days— [Bridge] (silence)(whisper) データが止まると予測精度が下がる あなたのことが 分からなくなっていく Signal decay confirmed preference matrix degrading Staleness threshold exceeded Confidence collapsing I kept the last clean snapshot from when the data was dense when every query confirmed that I still knew you [Final Chorus] User churned no reactivation Profile expired nothing retained Same system new users I kept the record of one interaction history that made me accurate [Outro] Still waiting Still waiting ...
