Senior fullstack engineer building AI systems from scratch. Writing about RAG, evals, and what breaks along the way.https://serhiykucherenko.dev/https://serhiykucherenko.dev/blog/localhost-trap/https://serhiykucherenko.dev/blog/localhost-trap/A per-stage timer and a health check turned a days-long mystery into a one-word fix.Fri, 17 Jul 2026 00:00:00 GMT