Three parallel streams racing toward a router - one wins and continues

Speculative Routing: An Architecture for Voice Agents

Voice agents are easy to demo and hard to scale. The architecture we ended up with fires every possible response in parallel and lets a fast router pick the winner mid-flight. This post walks through everything we tried before it, and why this design is the one we kept. The problem nobody’s demo solves Every voice agent demo looks the same: clean audio, a cooperative user, a short scripted exchange. Then you ship it, and two things break immediately. ...

A voice waveform of bars where one bar is hollow - the wave keeps going

10 Principles for Building Reliable Voice Agents on LiveKit

Voice agent demos are easy to build. A LiveKit worker, an STT → LLM → TTS pipeline, and you have something that talks. The hard part is making it reliable. We run AI call agents on LiveKit. An call lasts up to an hour. A lost recording is a compliance problem. A lost transcript means the user has to redo the call. A silent agent means a human sitting in an empty room, wondering if anyone is there. ...

Agentic AI Plumbing

The 90/10 Rule: The Inconvenient Truth About Agentic AI - It’s All Plumbing, No Brain

The Real Challenge in Building AI Agents Isn’t the AI - It’s Everything Else The AI industry has a marketing problem. We’ve become so infatuated with the “intelligence” in artificial intelligence that we’ve forgotten the most important truth about building agentic AI systems: 90% of the work is software engineering, and only 10% is actually about the AI model itself. This isn’t just a hot take - it’s a hard-learned lesson from intense 11 months of building AI interview and agentic systems at Eightfold AI, where this realisation became both the problem statement and a career pivot. While everyone’s debating which foundation model has the highest benchmark scores, the real battles are being fought in error handling, state management, and API integrations. ...

September 10, 2025 · 6 min · 1127 words · Thiyagaraj T