Vertex AI Agent Builder: 2026 Update Adds A2A and Eval Harness
The 2026 Vertex AI Agent Builder update adds A2A protocol support, a built-in eval harness, and managed Reasoning Engine instances. Lens: insurance.
6 min read
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AI Voice Agent Insights & Guides
Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
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Inside Claude Opus 4.7: The 1M Context Window Architecture Explained
A practical engineering deep dive into Claude Opus 4.7, covering architecture, tradeoffs, and what production teams need to know about 1M context window.
6 min read
UK AI Regulation 2026 — Sector-Led, Sandbox-Heavy, Quietly Tightening
The UK has not passed a horizontal AI law. Instead, regulators apply five cross-cutting principles inside their existing remits and the new AI Growth Lab pilots sandboxes. Here is how voice AI vendors should read the UK landscape in 2026.
10 min read
Voice Cloning Crossed the Indistinguishable Threshold: 2026 Defense
3-10 seconds of audio is now enough for an undetectable clone. Watermarking, cryptographic signatures, and the StreamMark spec — the 2026 defense map.
9 min read
Hotel PMS API Integration: Connecting AI Voice Agents to Opera, Mews, Cloudbeds
Every hotel runs on a PMS — Opera, Mews, Cloudbeds, ASI, RoomRaccoon. Here's how CallSphere's AI voice agents integrate with each via REST and GraphQL APIs.
7 min read
Hotel PMS Migration Checklist: 40 Tasks Most Operators Miss
A complete 40-item checklist for migrating from a legacy hotel PMS like ASI, Opera, or Maestro to a modern agentic AI platform. Includes data, integrations, policies, and go-live.
8 min read
Why 1X chose tendon drives over rigid actuators for Neo
1X Neo's tendon-driven actuation, refined through April 2026, halves passive force on collisions versus rigid harmonic drives — critical for shipping a humanoid into a home.
6 min read
A Postmortem Template for AI Agent Incidents
Standard SRE postmortems miss the half of an AI incident that matters: why did the agent decide that. Here's the template CallSphere has run for 11 production incidents in 12 months.
11 min read
Call Recording Laws by Country (2026): 40+ Countries
Consent rules for recording calls in 40+ countries: one-party vs two-party, storage limits and penalties. Updated 2026, with a quick-reference table.
14 min read
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