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user: ryantsuji created: 2026-07-04 karma: 23 CTO at airCloset, a fashion rental subscription service in Japan. I write about AI engineering harnesses, knowledge graphs, and observability at https://ryantsuji.dev submissions: Branching databases like code: a CI/CD pattern for Lakebase at Glaspoort 3 points | 0 comments Engineering High-Performance Parsers with Data-Oriented Design 1 points | 0 comments Closing a three-year-old issue using Rust arenas 2 points | 0 comments Two Case Studies of NaN 32 points | 18 comments Observability Design for the AI Era – App, Infra, CI, LLM (Part 1) 1 points | 0 comments Preempt_none Is Dead; Your Postgres Probably Doesn't Care 6 points | 2 comments Building Agents That Don't Break Themselves 9 points | 1 comments 0 points | 0 comments