Now

Second year of Computer Science and Technology at Tsinghua University in Beijing. The coursework is dense; the interesting part is outside it.

I run several coding agents daily — different harnesses, different models — and most of my building time goes into the parts around them: harness configuration, MCP servers, skills, hooks, and the small tools that make the loop shorter.

I write up a problem when it takes me longer than a day to debug. That is slower than posting, and it is the only way I have found to keep the note worth reading.