AI Tutorial
The Complete Guide to RAG Systems
LangChain + Ollama + pgvector: build a local RAG system from scratch, with working code and interview checkpoints.
AI Agent Series
The Think-Act-Observe Loop
A source-level look at Claude Code: how one loop carries the entire agent's capability.
AI Tutorial
A Glossary of 270+ AI Terms
From token to RAG to prompt engineering — a quick-reference map of 12 AI domains.
Analysis
The Economist, Nov 15 2025
The semiconductor advantage — and geopolitical risk — behind Taiwan's economic boom.
Analysis
Twilight of the County Town
Factories shutting down, real estate in decline, e-commerce squeezing local shops — the hidden China beneath headline growth.
Engineering Practice
Tmux: The Practical Bits
Detach/attach, panes, windows — only the operations you will actually use.
30+ original posts · 6 series · 5 directions