Agent Protocol

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One shared set of rules for coding agents across Claude Code, Cursor, GitHub Copilot, Windsurf, and any tool that reads AGENTS.md. Edit the rules in one place; every tool picks them up.

Why

If you use more than one AI coding tool, you've probably copy-pasted the same guidelines into CLAUDE.md, .cursorrules, .windsurfrules, .github/copilot-instructions.md, and so on. They drift. This repo keeps a single source of truth in core/ and points every tool-specific file at the same concatenated output.

Install

One-liner, run inside your project's root:

# all supported tools
curl -fsSL https://raw.githubusercontent.com/firenzemc/agent-protocol/main/scripts/install.sh | bash

# only the tools you actually use
curl -fsSL https://raw.githubusercontent.com/firenzemc/agent-protocol/main/scripts/install.sh | bash -s -- claude cursor

This takes a one-time snapshot of the protocol and writes it to every path a supported tool expects. The files won't auto-update — re-run to refresh. No .gitignore, no symlinks, no extra scaffolding is created.

Tool key	File written
claude	CLAUDE.md
agents	AGENTS.md
cursor	.cursor/rules/main.mdc
copilot	.github/copilot-instructions.md
windsurf	.windsurfrules

See EXAMPLES.md for per-tool notes and real-world usage.

Repo layout

core/                         ← single source of truth (edit these)
  00-principles.md            ← Karpathy 4 principles
  10-coding-style.md
  20-workflow.md
  30-communication.md
  40-stack-defaults.md
AGENT_PROTOCOL.md             ← concatenated build output
CLAUDE.md                     ← symlink → AGENT_PROTOCOL.md
AGENTS.md                     ← symlink → AGENT_PROTOCOL.md
.windsurfrules                ← symlink → AGENT_PROTOCOL.md
.cursor/rules/main.mdc        ← symlink → AGENT_PROTOCOL.md
.github/copilot-instructions.md ← symlink → AGENT_PROTOCOL.md
scripts/
  build.sh                    ← rebuild AGENT_PROTOCOL.md from core/
  install.sh                  ← one-liner installer for downstream projects

Editing the rules

1. Edit the relevant file in core/.
2. Run scripts/build.sh to regenerate AGENT_PROTOCOL.md.
3. Commit both the source change and the rebuilt AGENT_PROTOCOL.md.

The symlinks don't need to be touched — they always point at AGENT_PROTOCOL.md.

What's inside

• 00-principles.md — the four Karpathy principles: Think Before Coding, Simplicity First, Surgical Changes, Goal-Driven Execution.
• 10-coding-style.md — match the codebase, naming, comments, types, errors.
• 20-workflow.md — plan → reproduce → small changes → verify → when stuck.
• 30-communication.md — uncertainty, options, conciseness, honest progress reports.
• 40-stack-defaults.md — sensible defaults when the project doesn't constrain the choice.

License

MIT