Notes on AI engineering, LLM reliability, and backend systems.https://mihaperosa.com/https://mihaperosa.com/writing/aws-blocks-leaky-abstraction/https://mihaperosa.com/writing/aws-blocks-leaky-abstraction/A framework that makes local RAG feel like magic, until you deploy. Where the abstraction held, where it leaked, and what I'd reach for it for.Sat, 27 Jun 2026 00:00:00 GMThttps://mihaperosa.com/writing/making-an-ai-agent-reliable/https://mihaperosa.com/writing/making-an-ai-agent-reliable/Three times building one agent, the same bug bit me. Each time the fix was the same principle: never let the model hold a value that has to be exact.Mon, 22 Jun 2026 00:00:00 GMT