Writing
Essays and technical notes on LLM systems, data engineering, retrieval, agents, and evaluation.
- 中文预训练语料去重：从 MinHash 到段落级指纹
整理一次中文网页语料去重的实践：为什么文档级 MinHash 不够用，段落级指纹怎么做，以及如何验证去重没有误伤高质量内容。
- A Retrieval Eval That Survives Index Changes
Notes on building a small, fixed question set for a RAG system so it measures correctness instead of quietly agreeing with whatever the current index returns.
- Evidence-First LLM Systems
A working note on the question this site keeps returning to: what evidence should technical work leave behind, and how to design pipelines so the evidence is a byproduct, not a chore.