01
MCP & tools
How models actually reach your data and systems — the M×N → M+N problem it solves, the three primitives, the transports.
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02
Agents
The loop behind the buzzword: think, act, observe, repeat — and where it quietly goes wrong.
soon
03
Cost & caching
Prompt caching, token math, and the structure choices that cut cached-input cost by ~10×.
soon
04
RAG & context
Retrieval, chunking, context engineering — what to put in the window and what to leave out.
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Start with MCP in one page — then one concept a week.
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