Essays

Notes on AI-native engineering, ranked competition, and the next decade of software. rss

• 2026-09-02· 8 min read

  How Pull Up Learns What You Like

  The data sources behind a small music recommender, what each one is for, and the arithmetic that turns taps into a taste.

• 2026-09-01· 8 min read

  Skrillex, Because You Like Burna Boy

  A recommender produced an absurd result with correct arithmetic. The bug was three genre mappers, event-lineup inheritance, and a merge policy that never forgot.

• 2026-06-06· 6 min read

  AI Needs Ranked Mode

  The first ladder for AI operators starts by measuring skill, not spend.