nangohq/nango — reverse-engineered prompt

Build me an open source TypeScript platform for product integrations that I can self host or run locally. I want it to help my app and AI agents connect to lots of third party APIs, with a clean way to handle OAuth, API keys, token refresh, and multi customer connection management without me wiring all that up by hand.

It should have three core things. First, an embeddable auth flow I can drop into my app so users can connect accounts. Second, a secure proxy for making authenticated API requests on behalf of each user, with retries and rate limit handling. Third, a way to write integration logic as TypeScript functions, run them in a managed runtime, and inspect logs and results.

Please make it usable for common cases like syncing data, receiving webhooks, unified API style endpoints, and letting AI generated functions call external tools. A simple UI, API, and CLI would be great. Keep it production minded but easy to try locally. If you need details, look up the current docs online and fill in the sensible gaps.