I Built a Multi-Provider LLM Router for My AI Worker - Here's What I Learned

I Built a Multi-Provider LLM Router for My AI Worker — Here's What I Learned When I started integrating LLMs into my side project AuraFlow AI, I made the same mistake most backend engineers make: I hardcoded a single provider. One week in, Gemini free tier hit its rate limit at 11 PM while I was testing. Everything stopped. I had to manually swap the API key, restart the worker, and lose 20 minutes of debugging momentum. That was the last time I let a single LLM provider be a single