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Microsoft Build turns Windows into an agent platform - and brings Claude into Azure
- At Build (2–3 June) Microsoft positioned Windows as a platform for AI agents - open-sourcing its Windows Agent Framework under the MIT licence and adding production features (an "agent harness", hosted agents, parallel sub-agents) on top of its 1.0 agent SDK.
- Anthropic's Claude is now a first-party model in Azure AI Foundry alongside OpenAI and others, and "Agent Mode" - assign a task and it runs in the background - becomes the default across Office 365 (Word, Excel, PowerPoint).
- This is last week's preview made real: agents are becoming built into the everyday Microsoft stack, which lowers adoption friction but makes governance - identity, approvals, audit trails - a first-order design question.