Voice agents / Implementation guide
Plan the job.
Then the voice.
A practical guide to setting up an AI voice agent: the conversation, approved knowledge, permissions, integrations and evidence that the workflow works.
By David Bramante, builder of Sarah AI at CodexDeus in Austin. Published and updated November 1, 2026.
What does a voice-agent implementation need?
A business voice agent needs a clear job, a source of approved answers, a call entry point, restricted tools, a human handoff and a way to inspect outcomes and usage. The voice model is one component. Most implementation decisions concern the business workflow and its boundaries.
This guide reflects the calling, client-portal and reporting architecture behind Sarah AI. It is a planning guide for a new deployment, not a claim that every integration below is already included.
1. Choose a single job
Write the conversation’s purpose in one sentence. For example: call someone who requested an explanation of a service, ask the agreed qualification questions, and save the answers for a person. Decide what the agent must not promise, diagnose, quote or approve.
Agree before launch: A named business owner, audience, entry point, desired outcome and human handoff.
2. Prepare approved knowledge
Separate public information from internal material. Use current, approved answers with an owner who can update them. Define what happens when a question is outside that material: acknowledge the limit, capture the question and route it to a person.
Agree before launch: A bounded knowledge set, a revision owner and an escalation rule.
3. Scope the tools and permissions
Calling does not automatically grant permission to change a CRM, book an appointment or send a message. Identify the exact API operation, the fields it can read or write and the account it acts for. Enforce permissions on the server, not just in agent instructions.
Agree before launch: An integration list with approved actions and server-enforced account boundaries.
4. Define the audience and follow-up
Decide how people request or authorize calls and how the team handles opt-outs. Identify the owner of the contact data and the allowed calling windows. If a follow-up email or text is part of the workflow, configure its sender, recipient rules and delivery handling separately.
Agree before launch: A documented audience policy and approved channels for each next step.
5. Decide what gets recorded
Distinguish the request, provider acceptance, completed call, conversation record and follow-up outcome. Agree on access, retention and any recording notice appropriate to the business. A transcript is a record to review; it is not proof that the caller’s statement is accurate.
Agree before launch: A record policy and a way to trace each request through its actual outcome.
6. Separate setup, service and usage
Estimate call count and duration, then agree on setup and integration work, any recurring service charge and how measured usage is billed. Provider cost, billable usage and a service base are different amounts. Failed attempts and retries need an explicit treatment.
Agree before launch: Written commercial terms, a usage source, limits and a review process for discrepancies.
7. Test the complete workflow before launch
Test real calls from each intended entry point with the business owner. Review an ordinary question, an unknown answer, a failed connection, a repeat submission and a handoff. Correlate the request with the call record and any approved follow-up. An HTTP 200 or a ready status alone is insufficient.
Agree before launch: An acceptance record showing what completed, what failed and what remains open.
Which capabilities need separate setup?
| Capability | What to establish |
|---|---|
| Telephone calling | Number, authorized audience, entry point, instructions and real call acceptance. |
| CRM or booking tools | Specific provider/API, permission scope, duplicate handling and confirmed write results. |
| Email follow-up | Verified sender, allowed recipient, approved content and delivery reporting. |
| Text messages | Configured number, channel permissions, opt-out handling and delivery state. |
| Reporting and billing | Call identifiers, status definitions, usage source and agreed service terms. |
Sarah currently supports configured calling and selected email workflows. General Sarah email and expanded SMS remain planned. New CRM, booking or payment connections are scoped individually.
Bring the workflow. We’ll scope the setup.
Share the conversation’s purpose, the people involved, expected call volume and the systems Sarah needs to connect with. A focused first workflow makes the permissions, acceptance checks and commercial terms easier to agree.