AI Coding, Home and Voice Agents: Context Engineering, Persistent Harnesses and Tool Switching

The agent stack is consolidating around persistent context, memory, reusable skills, proactive execution, workflow abstractions, observability, browser tooling, sandboxes, validators, multi-agent delegation, selective routing, and increasingly agent-native data infrastructure. AlloyDB, Weights & Biases trace replay, and Meta's proposed enterprise platform reinforce the shift toward production feedback and governed deployment, while validation and review remain bottlenecks.