Show HN: Ergon - build AI agents in code or on a canvas that generates Python

Ergon is a monorepo toolkit for building AI agent harnesses, combining a Python SDK engine with a drag-and-drop visual Studio that generates Python code against it. The SDK covers tool-calling loops, control flow, a unified router for roughly 15 providers, RAG, MCP clients, browser control, OpenTelemetry traces and an evaluation harness, while the Studio adds a canvas, inspector, live preview and codegen. A bootstrap script sets up both halves, and harnesses can be served as REST + SSE endpoints or deployed via Docker with Postgres/pgvector and Redis.