Agent Skills: token-antiflash

[AUTO-INVOKE] MUST be invoked when designing or reviewing ERC20 token contracts that need flash loan protection. Covers token-level defense design patterns: cost tracking, same-block cooldown, progressive sell tax, minimum balance retention, EIP-7702 aware address checks, front-run protection, and referral binding. Trigger: any ERC20 token with anti-flash-loan, anti-bot, or tokenomics security design requirements.