x402 payment integration via OpenFacilitator SDK. Use when implementing crypto payments, paywalls, API monetization, or tipping/transfer flows. Triggers: "x402", "OpenFacilitator", "crypto payments", "USDC payments", "paywall", "payment middleware", "verify and settle", "402 Payment Required". Supports EVM (Base, Ethereum, Polygon, Arbitrum, Avalanche, Sei, IoTeX, Peaq, X Layer) and Solana and Stacks chains.
Expertise in API design, database modeling, and server-side logic.
Expertise in CI/CD, deployment, and infrastructure management.
Expertise in technical writing and maintaining clear project documentation.
Database schema design and query optimization with Drizzle ORM.
Specialized instructions for modern frontend development (React, Next.js, CSS).
Managing internationalization and localization workflows.
Expertise in Locus-specific configuration, commands, and workflows.