giancarloerra/januscope ? reverse-engineered prompt

Build me a local first MCP policy proxy called JanuScope that wraps any MCP server with one YAML config file. It should run on Node 20 plus, work with clients like Claude Code, Cursor, VS Code Copilot, and other MCP tools, and never send traffic through a hosted gateway. I want it to hide risky tools, block dangerous database writes, redact PII from returned data before the model sees it, log every call for audit, rate limit requests, and inject database schema up front so the model does not waste turns discovering it. Please include a few ready to use lens configs for common services like Postgres, MySQL, MongoDB, GitHub, Stripe, and filesystem access. Keep it easy to drop into an existing MCP setup with minimal changes, and make sure the project includes tests, clear docs, and sensible defaults for local use. If you need current MCP or client details, look them up online first.