Rulesync

What it does

When your agent uses it

• Syncing AI rules
• Running rulesync commands
• Generating rule files
• Managing shared AI coding configurations

Example prompts

• “Use the rulesync skill to generate and syncs AI rule configuration files (.cursorrules, CLAUDE.md, copilot-instructions.md) across 20+ coding tools…”
• “/rulesync”

Requirements

• Node.js

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

1. 1Init - rulesync init creates rulesync.jsonc config and .rulesync/ directory with sample rules
2. 2Write rules - Add shared AI rules in .rulesync/rules/, MCP configs in .rulesync/mcp/, commands in .rulesync/commands/
3. 3Generate - rulesync generate produces tool-specific files (CLAUDE.md, .cursorrules, .github/copilot-instructions.md, etc.)
4. 4Verify - rulesync generate --dry-run previews changes; --check validates files are up to date (useful in CI)

What it can do on your machine

Read from SKILL.md and the folder at commit f14b5bd. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • npm

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use npm, which can reach the network depending on how they are called.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Rulesync loads about 890 tokens when it runs. Until then it costs about 72 tokens; SKILL.md has 264 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~72

When it runs · the whole SKILL.md, loaded when a task matches

~890

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from dyoshikawa/rulesync at commit f14b5bd, republished under its MIT licence (© dyoshikawa). 264 words, ~890 tokens.

name

rulesync

description

Generates and syncs AI rule configuration files (.cursorrules, CLAUDE.md, copilot-instructions.md) across 20+ coding tools from a single source. Use when syncing AI rules, running rulesync commands, importing or generating rule files, or managing shared AI coding configurations.

targets

*

# Install
npm install -g rulesync

# New project: initialize config, rules, and directory structure
rulesync init

# Import existing AI tool configs into unified format
rulesync import --targets claudecode    # From CLAUDE.md
rulesync import --targets cursor        # From .cursorrules
rulesync import --targets copilot       # From .github/copilot-instructions.md

# Generate tool-specific configs from unified rules
rulesync generate --targets "*" --features "*"

© dyoshikawa, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/rulesync of dyoshikawa/rulesync.

Open the folder on GitHubat commit f14b5bd