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Microsoft launches Copilot harness in Foundry Agent Service in public preview

2 articles2 sourcessince Oct 28Last article 1h ago ·

Overview

AISummary of 2 articles

Microsoft introduces the Copilot harness in Foundry Agent Service in public preview, a managed system that runs the agent loop and sandbox for agents defined declaratively.

Developers supply skills, tools and instructions, and the preview includes file and code execution, subagents and source-controlled definitions. Microsoft says Foundry manages the execution environment's CPU, memory and idle settings. During the preview, developers select the Microsoft Copilot harness when creating an agent. Existing agents are unchanged, and switching the harness after creation is not yet supported.

Microsoft says harness runtime usage is free before December 1, 2026, when consumption-based billing begins. Model inference and separately billed tools and connected services remain subject to their own charges.

Satya Nadella says the unified Copilot harness is now in Foundry, a managed service for building long-running agents, as part of GitHub updates announced at Universe. Nadella's post does not state a separate launch date.

Written by AI from the articles below · updated Oct 28, 1:41 PM ET

Check the sources:

Latest developmentOct 28, 1:08 PM ET
GitHub unveils Copilot Fusion, Copilot Projects, and a unified Copilot harness

Developments

2 developments

  1. Oct 28, 1:08 PM ET · 1 article
    Microsoft announces GitHub Copilot Fusion, Copilot Projects and unified Copilot harness in Foundry at GitHub Universe
    Satya Nadella: GitHub unveils Copilot Fusion, Copilot Projects, and a unified Copilot harness
  2. Oct 28, 12:45 PM ET · 1 article
    Microsoft launches Copilot harness in Foundry Agent Service in public preview
    Microsoft Foundry Blog: Microsoft introduces a Copilot harness in Foundry Agent Service in public preview

Article timeline

The articles in this story. Times are ET.

Oct 28
  1. Satya NadellaXPick
    GitHub unveils Copilot Fusion, Copilot Projects, and a unified Copilot harness

    AISatya Nadella announces several GitHub updates at Universe. GitHub Copilot Fusion is said to deliver frontier-level quality, 40% faster and at up to 77% lower cost. A unified Copilot harness is now available in Foundry, and Copilot Projects adds an orchestration loop for building with multiple agents across repos.

    Video from @satyanadella's post
  2. Microsoft Foundry BlogOfficialPick
    Microsoft introduces a Copilot harness in Foundry Agent Service in public preview

    AIMicrosoft introduces the Copilot harness in Foundry Agent Service in public preview, a managed system that runs the agent loop and sandbox for agents defined declaratively. Developers supply skills, tools, and instructions, and the preview includes skills, connected Foundry and MCP tools, file and code execution, subagents, and source-controlled definitions.

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