# Changelog## Unreleased### Added- ERC-721-compatible NFT implementation- ERC-165 support- owner-controlled sequential minting- transfers, approvals and safe transfers- token burning- metadata URI support- Foundry unit and fuzz tests- security and architecture documentation- CI quality gates### Security- custom errors for validation failures- approval clearing on transfer and burn- state update before external safe-transfer callback- secret-safe repository configuration## Release policyA production release requires passing CI, documented security review, and a tagged version.