# Yevhen Herasimov — field notes Runtime reliability of LLM agent systems. Est. 2026. I make production LLM-agent systems reliable — and cheap. Field notes from operating them: real traces, real invoices, real 2am incidents. Operator, not researcher. If a language model could have written the post from public knowledge, it isn't here — every piece carries at least one number that could only come from running the thing. - Writing: / - About: /about - Work with me: /work - RSS: /rss.xml Contact: yevhen.gerasimov@gmail.com