Lecheeel

Hi — I'm Lecheeel. I work across a few fields that most people keep separate: LLM systems, embedded hardware, and security. The name comes from 立秋 (Liqiu), the solar term for the start of autumn, which happens to be when I was born.

I started with hardware — STM32 and ESP32 boards, PCB design — and drifted toward software, then machine learning, then the security side of both. These days most of what I build is self-hosted: agents, search, databases, all running on machines I control, on budgets that force honest engineering.

The projects listed below are recent ones — I work on a lot of things, and most of them never make it to a page. What does make it here gets written up properly, with the numbers and the parts that didn't work.

This blog is that record: research notes, mostly systems and security, written for myself first.