01Blog
Working notes &
ship logs.
Shorter pieces from the studio. Engineering decisions, post-mortems, opinions, and the occasional defense of a controversial take.
Latest
The four-week MVP, defended
People keep asking why we ship in four weeks instead of six months. It's not because we're faster. It's because four weeks is what's actually required to learn anything.
Sal Anvarov6 min read
Why we (mostly) don't use LLM frameworks
LangChain, LlamaIndex, Haystack — we have used them all and we ship most of our agents without them. Here is when frameworks help, when they hurt, and why we usually choose the harder-looking option.
LLMEngineeringOpinionThe eval set is the spec
For LLM-shaped products, the document that defines what the product does is the eval set, not the PRD. We have stopped writing PRDs for AI features and started writing the cases. The work is better for it.
LLMProductEvaluation