Arcium Dev Skill

A Claude Code skill for building privacy-preserving Solana programs with Arcium's Cerberus MPC protocol.

Battle-tested on the Zodiac Liquidity project (16/16 tests passing on devnet + localnet).

What's Included

File	Covers
SKILL.md	Main skill entry point and overview
program-integration.md	Anchor program structure, three-instruction pattern, callbacks
arcis-circuits.md	Arcis circuit syntax (Enc<Shared,T>, Enc<Mxe,T>, reveals)
argbuilder-patterns.md	All 5 ArgBuilder patterns for passing data to MPC
accounts.md	Account structs, byte offsets, encrypted state storage
client.md	TypeScript client — encryption, retry wrapper, MXE key fetch
encryption-patterns.md	Encryption types, nonce management, sealing
cli-deployment.md	arcium CLI build/test/deploy, Docker workflow
troubleshooting.md	Common errors and fixes from real development
security.md	Security checklist for MPC programs
examples.md	Pattern catalog (voting, auction, blackjack, etc.)

Usage

As a Claude Code Skill

Copy the files into your Claude Code skills directory:

mkdir -p ~/.claude/skills/arcium-dev
cp *.md ~/.claude/skills/arcium-dev/

Then invoke with /arcium-dev in Claude Code.

As Reference

Browse the markdown files directly — they're self-contained documentation covering the full Arcium development workflow from circuit design to deployment.

Tech Stack

• Anchor 0.32.1 — Solana program framework
• Arcium 0.6.3 — MPC privacy layer (Cerberus protocol)
• @arcium-hq/client 0.6.3 — TypeScript encryption + account helpers

License

MIT