Real-Time Polish AI Voice Agent for Sales Calls

An AI phone agent that speaks natural Polish, follows a real sales method, never invents prices and says in its first sentence that it is an AI assistant. I built a real-time pipeline: Deepgram streaming speech-to-text, a Claude talker guided by a slower strategist model, and a cloned ElevenLabs voice. The call is a graph of sales stages (opening, discovery, objections, booking) in Pipecat Flows, not one giant prompt. Around it: Polish turn-taking and barge-in rules, Polish numbers and times, call logs, a mini CRM, Twilio and Asterisk/SIP adapters and a browser demo. 396 commits, 43 architecture decision records, 6,159 offline tests. Telephony is tested offline; the line has not yet run with a real carrier.