dyoshikawa/rulesync: Unified AI Rules Sync Across Claude Code, Gemini CLI, Cursor, and 5+ Tools — 940 Stars

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Rulesync is a CLI that generates configuration files for Claude Code, Gemini CLI, Cursor, Windsurf, GitHub Copilot, OpenAI Codex, Cline, and Junie from a single source of truth. Write rules once, run 'rulesync generate', and every tool gets its own config format. Available via npm, Homebrew, and curl. As the number of AI coding tools proliferates, maintaining consistent rules across 8+ different config formats is becoming a real pain point — this is a small but sharp utility.