Learnings from 100K lines of Rust with AI (2025)

In the past few months, I’ve been stress-testing how far AI coding agents can take us when building real, production-grade distributed systems. The result: a Rust-based multi-Paxos consensus engine that not only implements all the features of Azure’s Replicated State Library (RSL) [1] — which underpins most major Azure services — but also modernizes it for today’s hardware. The entire project took me ~3 months, with 100K lines of Rust code written in ~4 weeks and performance optimization from 23