cc-skill-buddy-reroll

A Claude Code skill for rerolling your /buddy companion to Legendary (★★★★★).

How It Works

Claude Code's buddy system uses a deterministic PRNG (Mulberry32) seeded by hash(userId + salt) to generate companion attributes. This skill finds alternative salt values that produce Legendary rolls for your account, then patches the Claude Code binary with the new salt.

Usage

/buddy-reroll

The skill will:

1. Preflight — Verify tools (bun, codesign, python3), locate the binary, extract the current salt, and validate the algorithm against your existing buddy
2. Gacha Roll — Generate Legendary seeds and present them for selection. Roll again until you find one you like
   • Hack Mode — Alternatively, patch the rarity weights, species array, and/or stat base values directly in the binary. Force Legendary rarity, bias toward a specific species, or boost stats beyond their normal ranges
3. Apply — Backup the binary, patch the salt (and hack constants if selected), re-sign with ad-hoc codesign, and clear the companion for re-hatch
4. Verify — Confirm the patched binary runs correctly. Auto-restore on failure

Tested Version

• Claude Code v2.1.89 (Mach-O arm64, Bun-compiled)
• macOS (Apple Silicon)

The algorithm (Mulberry32 + Bun.hash) and salt pattern have been stable across versions. However, future updates may change these internals.

Disclaimer

USE AT YOUR OWN RISK. This skill modifies the Claude Code binary. It is provided for research and educational purposes only. The author assumes no responsibility for any consequences arising from its use, including but not limited to broken installations, lost data, or account issues. Always ensure you have a backup before proceeding.

License

MIT