Demo → Production · deterministic simulated evidence

Twilio ConversationRelay — first supported telephony adapter

Stress the five evidence gates, apply one bounded local remediation, and rerun the identical fixture to see the causal change. No credential or live telephony path exists in this MVP.

Simulation modeNo network

ModeSimulation mode
CredentialsCredentials not configured
CallNo live call placed
WebMCPdetecting

Configure the readiness test

Every control changes ephemeral browser state only. Run output is deterministic for the selected scenario and safeguard set.

Telephony adapterScenario

A clean appointment-confirmation turn with no injected transport or caller fault.

Configured safeguardsEnable token streamingMake the first generated token available before the complete response is ready.Shorten the first responseUse a concise opening response so speech can begin sooner and remain easy to interrupt.Enable interruptible playbackPreempt active playback after caller speech or DTMF and return the session to LISTENING.Define first and repeated silence policyReprompt once, then intentionally end the session after repeated silence.Require signature validationRequire initial X-Twilio-Signature validation before accepting the simulated session.Define reconnect and fallback behaviorRecover through fresh TwiML and a fresh session, with an explicit fallback if recovery fails.Enable structured observabilityRecord the bounded timeline, timing slices, failures, turns, safety checks, and task outcome.

Live ConversationRelay requires an eligible funded Twilio account. This lab cannot place a call, contact Twilio, read credentials, or change infrastructure.

Demo → Production evidence gates

No generic score: each gate retains its exact evidence, responsible owner, and next action.

Not run

Select a deterministic fixture and run it. The complete human workflow remains available when WebMCP is unsupported.

Production boundary

Initial X-Twilio-Signature validation is modeled but no webhook or WebSocket is opened.
Reconnect means fresh TwiML and a fresh session in the simulation; failure never becomes success.
REPROMPT, END_SESSION, transfer, playback, and intentional termination remain explicit.
Imported evidence: none. Live evidence: none. Provider calls and credits: zero.

Production-readiness guidance informed by Twilio ConversationRelay documentation and field insight from Isa Bell at Twilio.