CLAUDE.md templates
A starting CLAUDE.md and AGENTS.md for the stack you use.
A CLAUDE.md is a plain Markdown file that Claude Code reads at the start of every session. It holds what the agent cannot work out from the code: the commands that build and test the project, your conventions and the rules it must not break. AGENTS.md is the same idea in the shared format other coding agents read.
Pick your stack, copy the file into the root of your repository and change anything that differs from how your project works.
Once it is in place, the checker scores it and shows what it costs every session.
Next.js
App Router, TypeScript, server and client components.
Python
pytest, ruff, virtual environments and migrations.
Node API
A TypeScript HTTP service with thin handlers and validated input.
Monorepo
Several apps and shared packages in one repository.
React Native
One codebase for iOS and Android, with release and signing guardrails.
Go
Standard Go toolchain, errors with context, generated code left alone.
Looking for the other format? See the cursor rules templates.