Microsoft
Developer Blogs

Get the latest information, insights, and news from Microsoft.

Highlights

In memory of the man who put red and green squiggles under words

Starting in Word and expanding to nearly every other word processor, and even things that aren't word processors.
Read moreClick to read more about this post

Stop overloading your skills

You built a skill for your technology. API references, authentication flows, SDK patterns, error handling, version info, all packed into one skill. The agent calls it, gets all that context, and generates code. The kicker? You've just wasted a lot of tokens. It already knows Models have...
Read moreClick to read more about this post

Latest posts

Jun 29, 2026
Post comments count2
Post likes count1

Agent Harness: Working with your data, safely

Wes Steyn
Part 2 of Build your own claw and agent harness with Microsoft Agent Framework. In Part 1 we stood up a harness and gave our personal finance assistant its first abilities: a custom tool, web search, and planning. It can talk about the markets - but it can't yet touch your data, and...
Microsoft Agent Framework
Jun 29, 2026
Post comments count0
Post likes count0

Remote Event Receivers are retiring: move to SharePoint webhooks before July 1, 2027

SharePoint team
Remote Event Receivers in SharePoint Online are retiring. Starting July 1, 2027, all remote event receivers will stop firing events, including those registered using Microsoft Entra applications.
Microsoft 365 Developer Blog
Jun 29, 2026
Post comments count0
Post likes count0

Spring AI 2.0 is GA: Vector Search, Memory, and Agents on Azure Cosmos DB

Theo van Kraay
The wait is over. Spring AI 2.0 is generally available, and Azure Cosmos DB is right there with it. With this release, Spring AI graduates into a mature, production-ready framework for building AI applications in Java, and Azure Cosmos DB ships dedicated, vendor-maintained...
Azure Cosmos DB Blog
Jun 26, 2026
Post comments count0
Post likes count0

Azure Developer CLI (azd) - May and June 2026

Kristen Womack
A combined May and June recap. A new azd tool command group, the cross-platform azd exec runner, safer multi-layer provisioning, an interactive Ctrl+C cancel prompt, Go support for Azure Functions, self-contained extension bundles, per-tenant subscription filters, and a long list of correctness fixes for parallel Container Apps deploys and authentication.
Azure SDK Blog
Jun 26, 2026
Post comments count10
Post likes count4

The case of the DLL that was not present in memory despite not being formally unloaded, part 2

Raymond Chen
Tying two bugs together.
The Old New Thing
Jun 26, 2026
Post likes count0

Passing Context Between Agents in Multi-Agent A2A Systems

Olha,
Scott
How we solved the challenge of passing conversational context between independently deployed agents using the A2A protocol's embedded context pattern, keeping domain agents stateless and secure.
ISE Developer Blog
Jun 25, 2026
Post comments count0
Post likes count0

Save the Date: Pure Virtual C++ 2026

Marian Luparu
Pure Virtual C++ is back for its 7th year! Join us on July 21 for a free, one-day virtual conference for the whole C++ community.
C++ Team Blog
Jun 25, 2026
Post comments count0
Post likes count0

Your agent already has a plan

Garry Trinder
If an agent isn't doing the right thing, the obvious move is to make the docs clearer. Add a tip, spell out the correct command, describe the right approach more prominently. You do all of that, and the agent still ignores it. It does what it had already decided to do. The tip wasn't...
Microsoft for Developers
Jun 25, 2026
Post comments count0
Post likes count0

Learn from Microsoft: Transform software development through an agentic platform

Poonam Gupta
See how Microsoft is transforming software development with agentic workflows, AI-powered automation, and specialized agents across the engineering lifecycle.
Microsoft for Developers
Jun 25, 2026
Post comments count5
Post likes count7

The case of the DLL that was not present in memory despite not being formally unloaded, part 1

Raymond Chen
Figuring out how it went missing.
The Old New Thing
Jun 25, 2026
Post comments count0
Post likes count0

Which Azure Cosmos DB Role Does My App Need?

Sudhanshu,
Iria
In the previous post in the series, we covered the security decisions you make on day one. In this part, we will talk about how to give your app access to Cosmos DB data, using roles and a managed identity instead of keys. The situation You’ve built your app. It works locally. Now...
Azure Cosmos DB Blog
Jun 24, 2026
Post likes count0

Visual Studio Code 1.126

Visual Studio Code Team
Learn what is new in Visual Studio Code 1.126 Read the full article
VS Code Blog
Jun 24, 2026
Post comments count0
Post likes count1

Azure Functions MCP Extension: What's New at Build 2026

Lily Ma
A roundup of what shipped in the Azure Functions MCP extension since preview: resource and prompt triggers, MCP Apps, built-in MCP authentication, structured and rich content, fluent .NET configuration APIs, and what is coming next.
Azure SDK Blog
Jun 24, 2026
Post comments count2
Post likes count0

When the model has never seen your code

Waldek Mastykarz
This is the fifth article in a series about Agent Experience (AX): the practice of making AI coding agents work correctly with your technology. The series covers what you can and can't control in the agent stack, how to measure whether your extensions are helping or hurting, and how to...
Microsoft for Developers
Jun 24, 2026
Post comments count0
Post likes count1

Cancellation of Windows Runtime activities is asynchronous

Raymond Chen
You're asking for it to cancel, but it doesn't wait for confirmation.
The Old New Thing
Jun 23, 2026
Post comments count2
Post likes count1

Streamline C++ Code Intelligence Setup in Copilot CLI

Sinem Akinci
C++ developers can now bring IDE-style semantic intelligence into Copilot CLI with less setup. The C++ language server plugin supports richer code navigation, diagnostics, symbol understanding, and code changes by using the same build context your compiler does. That build context...
C++ Team Blog
Jun 23, 2026
Post comments count0
Post likes count1

Add vs Stage and Register

Howard Kapustein
As previously mentioned to 'install' a package, as people think of the term, Windows actually performs two separate operations: staging and registration. To oversimplify: Staging puts the package content on disk. At this point the package is present, but inert and unused. Registering...
Inside MSIX
Jun 23, 2026
Post comments count10
Post likes count3

Microspeak elaborated: Isn't escrow just a release candidate by another name?

Raymond Chen
Yes, but the name is a psychological trick.
The Old New Thing
Jun 23, 2026
Post comments count4
Post likes count1

Going beyond text in Microsoft 365 Copilot - Introducing SharePoint Copilot Apps

Vesa Juvonen
Microsoft 365 Copilot is brilliant with words - but work isn't only words. Introducing SharePoint Copilot Apps: bring rich, interactive UX components straight into the Copilot canvas, built with any JavaScript stack your team already knows. Reuse your existing SPFx investments across Copilot, SharePoint, and Teams - no new platform, no infrastructure, no lock-in.
Microsoft 365 Developer Blog
Jun 22, 2026
Post comments count0
Post likes count0

Azure SDK Release (May 2026)

Justin Bettencourt
Azure SDK releases every month. In this post, you'll find this month's highlights and release notes.
Azure SDK Blog
Jun 22, 2026
Post comments count0
Post likes count3

Meet your agent harness and claw

Wes Steyn
Part 1 of Build your own claw and agent harness with Microsoft Agent Framework. In the overview we said a "claw" is really just an agent harness: a loop around a model, wired up with tools, planning, memory, and more. In this first post we stand up that loop and give our personal...
Microsoft Agent Framework
Jun 22, 2026
Post comments count0
Post likes count0

Build your own claw and agent harness with Microsoft Agent Framework

Wes Steyn
What does it take to build your own "claw" - a capable, CLI-style agent that can plan, use tools, remember things, and safely act on your behalf? Coding agents and assistants like these can feel like magic, but underneath they are an agent harness: a loop around a language model wired up...
Microsoft Agent Framework
Jun 22, 2026
Post comments count0
Post likes count3

Models don't have preferences, they have context

Waldek Mastykarz
You open a fresh chat, type "What framework should I use for a web app?", and the model says "React." You screenshot it, share it, and write "Claude prefers React." It gets engagement. People nod along. A few reply with their own results. And now we have a consensus: Claude prefers React....
Microsoft for Developers
Jun 22, 2026
Post comments count24
Post likes count14

In memory of the man who put red and green squiggles under words

Raymond Chen
Starting in Word and expanding to nearly every other word processor, and even things that aren't word processors.
The Old New Thing
Jun 22, 2026
Post comments count0
Post likes count1

How to Use Deep Agents with Azure Cosmos DB – Plan, act, and verify against operational data

Abhishek Gupta
Deep Agents is an agent harness built on LangGraph, for agents that need to work through a task over many steps instead of a single LLM call. The agent runs tools, looks at the results, and uses that to pick the next one, keeping a todo list as it goes. On top of that loop the harness...
Azure Cosmos DB Blog
Jun 22, 2026
Post comments count0
Post likes count0

Retirement of Azure DevOps issuer in Workload identity federation service connections

Eric van Wijk
We are announcing the deprecation of the Azure DevOps issuer in workload identity federation (WIF) service connections, with planned retirement on July 1, 2027. The Azure DevOps issuer uses the https://vstoken.dev.azure.com prefix in federated credentials. This change is part of...
Azure DevOps Blog
Jun 21, 2026
Post comments count0
Post likes count0

Copilot 在 JetBrains IDE:功能更新与 Claude 作为 Agent 提供方预览

Jialuo Gan
本次更新为 GitHub Copilot for JetBrains IDEs 带来了对来自 GitHub 的组织和企业级 agent 的支持,让你可以在 Copilot CLI 会话中排队和引导消息,引入了全新的 agent 调试日志摘要视图,并将 Claude 作为 agent...
Java Blog in Chinese
Jun 19, 2026
Post comments count1
Post likes count2

What does it mean when the bottom bit of my HMODULE is set?

Raymond Chen
A special kind of HMODULE.
The Old New Thing
Jun 19, 2026
Post likes count0

Separating Deterministic Extraction from AI Inference in Industrial Summarization

Viktor Ciroski
When 100% of our prototype outputs were valid JSON but 0% met the data contract, we discovered the LLM was doing work that software should own. A field classification exercise and 4-pass pipeline brought schema compliance from 0% to 100%.
ISE Developer Blog
Jun 19, 2026
Post likes count0

What 50,000 Runs of a 5-Line Eval Taught Us

Julia Kasper
How AI coding models calibrate effort, token cost, and tool use on even the simplest task, and what that means for model selection and cost. Read the full article
VS Code Blog
Jun 18, 2026
Post comments count0
Post likes count3

Meet the Agent Academy Hackathon Winners

April Dunnam
From May 12 to June 2, 2026, builders from around the world put their Agent Academy learning to the test by designing, building, and shipping real, working AI agents with Copilot Studio. After two weeks of judging, we’re thrilled to announce the Agent Academy Hackathon winners. 🏆...
Power Platform Developer Blog
Jun 18, 2026
Post comments count0
Post likes count1

Outcome-driven learning systems: Enterprise RL with OpenEnv and Foundry

Govind Kamtamneni
We shipped a lot at Build 2026: hosted agents, Toolboxes, Foundry IQ, Memory, Managed Compute, fine‑tuning, Frontier Tuning, and a new evaluation and optimization stack. Read as a feature list, it is a lot to hold in your head. So here is a simpler way to see it: these are the parts...
Microsoft Foundry Blog
Jun 18, 2026
Post comments count0
Post likes count0

DirectX Dump Files Preview Now Available!

Jacques van Rhyn
At this year’s GDC, we shared our vision for bringing console‑level GPU developer tools to Windows. As part of that announcement, we introduced DirectX Dump Files as a major step forward in GPU crash debugging on Windows. Today, we’re excited to make our DirectX Dump Files public...
DirectX Developer Blog
Jun 18, 2026
Post comments count0
Post likes count2

PIX 2606.18-preview: DirectX Dump Files and more

Austin Kinross
Today we released PIX 2606.18-preview, available here. This PIX release coincides with the preview availability of DirectX Dump Files (.dxdmp). The PIX UI can open DirectX Dump Files directly for analysis, and the PIX API can be used to analyze them programmatically. Please visit the...
PIX on Windows
Jun 18, 2026
Post comments count4
Post likes count1

Stop overloading your skills

Waldek Mastykarz
You built a skill for your technology. API references, authentication flows, SDK patterns, error handling, version info, all packed into one skill. The agent calls it, gets all that context, and generates code. The kicker? You've just wasted a lot of tokens. It already knows Models have...
Microsoft for Developers