Model Database Protocol — intent-based, secure database access for LLMs with schema validation, policy engine, data masking, and MCP server support

基于 RAG 检索增强 + LangGraph Agent + 多层安全校验的电影数据智能问答系统

Text-to-SQL analytics copilot as a graph workflow (Google ADK 2.0): sqlglot AST validation (read-only, allow-listed, LIMIT-bounded) between the model and the database, sandboxed DuckDB execution, self-correction, charts, full-stack FastAPI + Next.js. Runs offline with an execution-accuracy gate.