Show HN: Sqlsure – deterministic semantic checks for AI-generated SQL

Sqlsure is a tool that performs deterministic semantic checks on AI-generated SQL queries to catch logical errors that databases and linters miss, such as double-counted joins or incorrectly summed averages. It validates queries against metadata rules declared in existing dbt tests without requiring new languages or LLM calls, operating in 0.1 milliseconds and offering machine-actionable fixes for errors. The tool can be integrated as a CI gate or MCP server to ensure SQL correctness before execution.