Docs
Agent instruction files, explained
Short, practical guides on the files that drive coding agents — the thinking behind the Groundrules block catalog, readable with or without the product.
What is AGENTS.md?The open, multi-tool instruction file coding agents read before touching your repo — origin, which tools support it, and a full worked example.CLAUDE.md examples that actually workFour real files — Next.js, Python API, monorepo, CLI — plus file locations, imports, /init, and the anti-patterns that make Claude Code ignore yours.How to structure a system promptThe seven-section order, hard vs. soft rules, variables, and how to test that any of it holds.