Launch HN: Vendo (YC S26) – Let users build features on top of your product

Vendo is an open-source customization layer that allows B2B SaaS customers to build their own features and micro-apps directly within a host product using an embedded AI agent. The agent operates through the product's existing API as the signed-in user and generates UI in a sandboxed, brand-native interface without touching source code. It can be installed in 60 seconds and enables users to create views, remix UI, and automate workflows through natural language commands.