What is crossrule CLAUDE.md?

A project instruction file for Crossrule, a TypeScript command-line tool intended to convert configuration files between AI coding editors and assistants. It documents the project, its commands, and its planned workflow.

Use it when developing, testing, building, linting, or planning commands for converting rules between supported coding tools.

It helps a coding agent understand the repository’s structure, available development commands, and current limitations before making changes.

How ssakone/crossrule configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to ssakone/crossrule. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/ssakone/crossrule/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/ssakone/crossrule

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/ssakone/crossrule/claude-md/github.svg)](https://agentmods.dev/instructions/ssakone/crossrule/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/ssakone/crossrule/claude-md"><img src="https://agentmods.dev/badge/instructions/ssakone/crossrule/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/ssakone/crossrule/claude-md"><img src="https://agentmods.dev/badge/instructions/ssakone/crossrule/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 860 This file is loaded in full into every session.

When invoked 860 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00860	$0.00860
Opus 5.5	$0.00344	$0.00344
Sonnet 5.5	$0.00172	$0.00172
Haiku 4.5	$0.00086	$0.00086

Measured 2mo ago against content hash 7cdb44514b44, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

crossrule CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Rulehop is a Node.js CLI tool written in TypeScript that converts rule configurations between different AI code editors and assistants (Cursor, Windsurf, Cline, VSCode, Codex CLI, Claude Code, Qoder, Trae, QwenCoder).

Commands

Development Commands

# Development workflow (planned)
npm run dev          # Run CLI in development with tsx
npm run build        # Compile TypeScript to dist/
npm run watch        # Watch mode with nodemon
npm test            # Run Jest test suite
npm run lint        # ESLint code checking
npm run format      # Prettier code formatting
npm run clean       # Remove build artifacts
npm run release     # Semantic release automation

# Current available
npm test            # Currently outputs error - project in early development

CLI Usage (when implemented)

rulehop convert --from cursor --to windsurf [path]
rulehop list-formats
rulehop validate [file]

Architecture

The project follows a modular CLI architecture with TypeScript:

Core Structure

src/cli.ts - CLI entry point using Commander.js
src/commands/ - Command implementations (convert, list-formats, validate)
src/parsers/ - Format-specific parsers for each AI editor
src/converters/ - Conversion logic between formats
src/types/ - TypeScript interfaces for rules, configs, conversion options
src/utils/ - Shared utilities

Supported AI Editor Formats

Cursor: .mdc files in .cursor/rules/
Windsurf: Markdown in .windsurf/rules/
Cline: Markdown in .clinerules/
VSCode: Multiple formats depending on AI extension
Codex CLI: TOML config + Markdown rules
Claude Code: JSON settings + Markdown memory
Qoder: Natural language text files
Trae: Markdown with YAML frontmatter
QwenCoder: JSON settings + Markdown context

Key Dependencies

Commander.js (14.0.0) - CLI framework
chalk (5.6.0) - Terminal styling
inquirer (12.9.3) - Interactive prompts
js-yaml (4.1.0) - YAML parsing
gray-matter (4.0.3) - Frontmatter parsing
fast-glob (3.3.3) - File pattern matching

Read the full file on GitHub · 103 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 103 lines · 860 tokens per session scan A 7cdb44514b44

Subscribe to this mod's changes

crossrule CLAUDE.md is an instructions file published in the GitHub repository ssakone/crossrule (4 stars, last pushed 1y ago), licensed MIT. It adds 860 tokens to every session, about $0.0034 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

crossrule CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
crossrule CLAUDE.mdssakone/crossrule	Instructions file	4	1y ago	MIT	A	860	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,649	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode ai-customization.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	1,907	GitHub Copilot

crossrule: Instructions file for Claude Code