Reusable patterns for structuring Claude agent prompts
Code-level patterns from a Built-with-Opus hackathon: contract prompts, typed tools, tiered context, plan-then-act, and structured errors.
7 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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Build a Claude Code agent: a step-by-step walkthrough (Built With Opus Hackathon)
An hour-by-hour walkthrough of building a working Claude Code agent at a Built-with-Opus hackathon: scaffold, loop, tools, skills, and ship.
7 min read
Inside a Built-with-Opus Claude Code agent's architecture
How a Built-with-Opus hackathon agent fit together end to end: driver loop, context store, tool layer, skills, and orchestrator explained.
8 min read
AI Patient Feedback Survey: HIPAA, De-Identification, and the Honest Comment Box
A patient feedback survey is part operations, part marketing, part complaint pipeline. The 2026 HIPAA-aligned design uses de-identification, opt-in, and a clear marketing line so the data is usable without becoming a leak.
10 min read
Real-World Call Quality: CallSphere vs Vapi (User-Tested 2026)
User-tested call quality comparison of CallSphere vs Vapi in 2026 — interrupt handling, accent robustness, turn-taking, and hangup behavior scored.
12 min read
Cohere Rerank v3 vs Voyage Rerank vs Jina: Quality and Cost Tested
Three reranker families dominate 2026 with different pricing and accuracy profiles. Quality on real RAG datasets, latency, and price-per-million ranked pairs measured.
11 min read
Twilio Voice Insights API for AI Ops: Trust, Engagement, Conversation Relay (2026)
The Voice Insights Reports API + Conversation Relay Insights (both GA in 2026) give you call-quality, trust, engagement, and AI-agent observability in one place. We wire them into CallSphere's on-call SLO dashboard.
11 min read
Call Recording Retention Policies: CallSphere vs Vapi Defaults
How long should you keep call recordings? CallSphere ships per-vertical retention defaults; Vapi customers DIY. Compare lifecycle and erasure flows.
11 min read
Sub-Agents in Claude Code 2.1: When and How to Spawn Them
A practical engineering deep dive into Claude Code 2.1 sub-agents, covering architecture, tradeoffs, and what production teams need to know about agent orchestration.
9 min read
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