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erc721-patterns

Use when building or integrating ERC-721 NFT contracts. Covers standard interface, metadata, enumerable extension, royalties (EIP-2981), lazy minting, soulbound tokens, and safe minting patterns.

skills/erc721-patterns/SKILL.md

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# ERC-721 NFT Patterns

## Standard Interface

```solidity
interface IERC721 {
    function balanceOf(address owner) external view returns (uint256);
    function ownerOf(uint256 tokenId) external view returns (address);
    function safeTransferFrom(address from, address to, uint256 tokenId) external;
    function transferFrom(address from, address to, uint256 tokenId) external;
    function approve(address to, uint256 tokenId) external;
    function setApprovalForAll(address operator, bool approved) external;
    function getApproved(uint256 tokenId) external view returns (address);
    function isApprovedForAll(address owner, address operator) external view returns (bool);