Claude Code

A pegboard wall of bicycle workshop tools, every wrench and plier hung in rows in full view

How to Build an MCP Server (and Read What It Costs per Turn)

The quickstart gets you a working MCP server in twenty minutes. What it doesn’t say: every tool you define is a paragraph the model reads before every reply, for as long as the server is connected. Build one, then read what it ships.

A hand holding a typed index card at the front of an open library card catalog drawer

What Goes in CLAUDE.md, and What Belongs in an ADR

You read the previous post and pasted the why into CLAUDE.md, and now that paragraph rides along on every task the agent ever runs. The sign belongs there. The reason doesn’t.