# Building in loops

> Field notes on agentic AI development, loop engineering and autonomous coding agents — from the team building an Open Code (source-available), self-hosted AI workspace.

- [Prompt Engineering Is Dead. Long Live Loop Engineering.](https://aifa.dev/en/blog/the-end-of-prompt-engineering): Boris Cherny, who leads Claude Code at Anthropic, says he no longer prompts Claude — he writes loops. Inside the death of prompt engineering and the rise of loop engineering: agentic AI workflows, autonomous self-correcting agents, why verification beats prompt-craft, and how Fractera runs the same loop in production with multi-agent orchestration (Hermes) and LightRAG graph memory.
- [The Trillion-Dollar Opportunity Is the Salon Next Door](https://aifa.dev/en/blog/trillion-dollar-service-opportunity): Why the biggest near-term money in AI is not a unicorn — it is the hair salon, the clinic, the dental office next door. The no-show problem, the businesses with no site and no CRM, and how Fractera lets almost anyone automate them in ten minutes.