AI for service businesses·Apr 7, 2026·10 min read

Building a missed-call-text-back agent in under 3 hours

Echo's lite version, the architecture, the Twilio + Claude + WhatsApp wiring, and the SLO we ship against.

PYKSL Editorial

Build team

Six agents we deploy by default, the failure modes we audit out, and the observability layer that keeps them honest.

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