xby-db: A Database Access Plugin for DeepSeek Harness

xby-db is an MCP database plugin for the DeepSeek Harness ecosystem, designed to connect securely to databases via the MCP protocol. It supports SQLite, PostgreSQL, MySQL, and MariaDB, and provides core features such as setting an API key, listing table schemas, executing SQL statements (including named parameters), retrieving execution plans, and generating audit logs. Users must register to obtain a key and enable write-operation permissions in the configuration to achieve standardized database interactions.