Worked on the tonkeeper/ton-assets repository to deliver a comprehensive configuration for the Electronic Coin Unit (ECU) token, focusing on enabling its listing and accurate display within the TON ecosystem. Utilized YAML for structured metadata management, ensuring all relevant fields such as name, symbol, address, decimals, description, image, and social links were standardized for wallet and explorer compatibility. Emphasized blockchain development best practices by linking external references to improve token verifiability and community engagement. This work established a scalable foundation for future token onboarding, enhanced asset catalog quality, and promoted disciplined metadata practices, with ongoing minor maintenance and documentation improvements.