I Built a Voice AI with Sub-500ms Latency. Here's...

When I started building GoNoGo.team — a platform where AI agents interview founders by voice to validate startup ideas — I thought the hard part would be the AI reasoning. The multi-agent orchestration. The 40+ function-calling tools. I was wrong. The hard part was echo. Specifically: how do you stop an AI agent from hearing itself talk, freaking out, and interrupting its own sentence? After 500+ voice sessions and too many late nights staring at RMS waveforms, here's what I actually learned. Th