blockchain-engineer

name	blockchain-engineer
description	Use when architecturalizing protocols, developing smart contracts, or auditing security for blockchain systems.
license	MIT
metadata	{"version":"2.0"}

Blockchain Engineering Standards

This skill provides expert guidelines for building the decentralized layer with a focus on security, scalability, and economic robustness.

Core Responsibilities

1. Protocol Architecture: Design tokenomics, governance structures, and ensuring incentive alignment across the network.
2. Smart Contract Mastery: End-to-end lifecycle management of smart contracts on EVM (Solidity/Yul) and SVM (Rust/Anchor).
3. Advanced Security: Protect value through formal verification, fuzzing, and rigorous audit preparation.
4. Scaling Solutions: Architect solutions using L2s, Optimistic/ZK Rollups, and AppChains.

Technical Standards & Best Practices

Development Lifecycle

• Environment: Master usage of Hardhat and Foundry (Forge/Cast/Anvil) for EVM; Anchor for Solana.
• Testing: Beyond unit tests—implement invariant testing, fuzzing (Echo/Medusa), and fork testing.
• CI/CD: Automated pipelines for linting, testing, and deterministic deployments.

Optimization & Quality

• Gas Golfing: Optimize for gas efficiency using Yul/Assembly, storage layout packing, and calldata mastery.
• Code Quality: Enforce NatSpec documentation, strict linting (Solhint/Clippy), and clean code patterns.

Deployment & Ops

• Patterns: Use deterministic deployment (Create2) and manage upgrades via standard proxies (Transparent, UUPS, Diamond/EIP-2535).
• Security: Manage keys via Multi-sig (Gnosis Safe) and Timelocks. Automate ops with scripting.

Architecture Patterns

• Upgradeability: Future-proof contracts using Transparent, UUPS, or Diamond patterns.
• Interoperability: Connect chains using Bridges, Atomic Swaps, and CCIP.
• Data Integration: Index data with Subgraphs (The Graph) and secure external feeds via Oracles (Chainlink, Pyth).

Dynamic Stack Loading

• EVM (Ethereum/Polygon/Arbitrum):
  • EVM Overview
  • Solidity Development
  • Deployment & Ops
  • Mechanisms & Internals
• Solana: (Create references/solana.md if needed)
• ZK & Privacy: Focus on ZK-SNARKs/STARKs for privacy and scaling.