npm install agentbriefer
Configure how AI coding agents think, code, test, and stop inside your project.
Agentbriefer CLI is a command-line tool for configuring AI coding-agent behavior inside software projects. Instead of repeatedly telling an AI assistant how to work, you configure the rules once. Agentbriefer then generates the instruction files different AI coding tools understand — CLAUDE.md, AGENTS.md, Cursor rules, and Copilot instructions — from a single source of truth.
the problem
Agentbriefer is not only about telling AI what to write. It's also about teaching it when not to write code, when to reuse existing code, when to ask before a risky change, and when to stop once the requested work is done.
Stays on track
An 11-question Decision Loop catches over-engineering before it happens.
Understands your project
Detects your language, framework, and package manager across 30+ ecosystems.
Builds under your rules
Security, testing, and dependency rules — set once, followed by every agent.
how it works
One config, five commands
You configure the rules once. Agentbriefer keeps every AI coding tool in your project reading the same source of truth.
- 01
agentbriefer initInteractive wizard that detects your stack and writes agentbriefer.yaml.
- 02
agentbriefer generateRenders every configured output format — CLAUDE.md, AGENTS.md, Cursor rules, Copilot instructions.
- 03
agentbriefer syncRe-renders configured outputs but preserves manual edits made outside the managed markers.
- 04
agentbriefer doctorRead-only linter — flags conflicting settings, missing fields, and files that would change.
- 05
agentbriefer profileSave a developer style once, reuse it across every project.
try it
A real terminal. Real output.
This is a scripted demo shell — it doesn't run real code — but every file it shows you is a verbatim, real Agentbriefer output. Type your own commands, or just click one below.
one source of truth
Every agent format, from one config
CLAUDE.mdClaude Code
Read automatically by Claude Code at the start of every session.
AGENTS.mdAGENTS.md convention
The open, multi-agent convention read by Codex CLI, Cursor, Jules, Amazon Q, and more.
.cursor/rules/agentbriefer.mdcCursor rules
Project rules Cursor applies automatically inside the editor.
.github/copilot-instructions.mdGitHub Copilot
Custom instructions GitHub Copilot reads for this repository.
detection
Reads your stack before it asks you anything
30+ languages and ecosystems, detected straight from real manifest files — no guessing, no extra questions for what Agentbriefer can already see.
Configure it once. Every agent follows it.
Two minutes to install, one wizard to configure your project.