# antirez (Salvatore Sanfilippo)

Salvatore Sanfilippo, who writes as antirez, is the Italian programmer who created Redis in 2009 and maintained it as BDFL for its first decade. He left the project in 2020, spent some years away, and rejoined Redis in 2026 — the same year Redis Inc's licensing history and feature accretion became a public subject (see [[redis-cost-of-ambition]]). He is known for a plain, opinionated blog at antirez.com and for code with a strong readability aesthetic; other engineers cite his taste even when they criticize Redis's direction.

Since early 2024 he has written repeatedly about programming with LLMs, often taking positions the field is reluctant to hear. His July 2026 post [[control-the-ideas-not-the-code]] is the clearest statement: control the design of your software and stop reviewing the generated code line by line, because reading code is no longer where the value is. He frames this partly as reassurance for younger or less-prepared programmers who feel they are betraying their field by coding differently. He mentions a 2022 book, written before ChatGPT, that he says predicted much of what has since happened.

His current side project is **DwarfStar**, an open-source engine for local LLM inference. He used it to implement inference for two models (DeepSeek v4 and GLM 5.2) with heavy automation, and reported finding subtle correctness bugs in other inference systems — accumulating errors in attention implementations, broken indexed-attention code that degrades output past a context-length threshold. He offers this as evidence that rigorous design plus testing beats hand-writing GPU kernels, and that the value of AI-assisted work is highest in exactly these fast-moving, error-prone domains.

His stance sits alongside [[simonw-vibe-coding-agentic|Simon Willison's]] admission that the line between vibe coding and reviewed agentic engineering has collapsed, and traces back through Brooks' *Mythical Man-Month* — "controlling the ideas" is Brooks' phrase — the same lineage examined in [[no-silver-bullet-llms]].