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Building voice agents that actually work
Hands-on guides from the team that builds AI phone agents: real prompts, real call flows, transfer logic, and the UK compliance most guides skip.
How to Structure a Voice Agent System Prompt
The reusable structure behind our production voice-agent prompts: six universal blocks, five earned ones, and the three-tier precedence ladder no vendor guide documents.
Is AI Cold Calling Legal in the UK?
The pages that rank for this question give opposite answers and none of them quotes the statute. The law turns on six words written in 2003, and on a distinction the regulator has never ruled on.
The System Prompt for an Electrician's AI Phone Agent
A complete UK electrician prompt, with the safety block that cannot be copied, the rule that routes network faults away, and the six things the agent must never say.
The System Prompt for a Dental Practice AI Phone Agent
The complete UK dental system prompt, with every emergency line quoted from NHS.uk, the NHS-or-private branch, and the three things it must never assert.
What Happens When the Caller Switches Language?
Two callers most agents handle badly: one on a building site, one who switches to Urdu mid-sentence. What the defaults do, and what the law does not require.
Putting a UK Phone Number on an AI Agent
Which number type to choose, the three routes to connect one, and the emergency-calling question you need to settle before you port anything.
Your Forty Answers Do Not Need a Vector Database
Retrieval adds a hop, a threshold you cannot interpret and a silent failure mode. What the platforms document, and when a knowledge base earns its place.
A Screening Ruleset for Spam Calls to an AI Agent
Nine rules to configure, with the settings, the UK regulator position, and the callers each rule will wrongly block if you set it too hard.
The n8n AI Agent Node That Was Missing Its Connectors
A debugging note. My AI Agent node had one output instead of several, the explanation everyone gave me was wrong, and the cause was my reverse proxy.