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Highlights

MCP Beyond the Chat Window: Build Diagnostics in CI

A practical tour of the Model Context Protocol tools for .NET build diagnostics - the full Binlog MCP toolset, how those tools run inside a GitHub Actions workflow, and what the evaluation data says about the efficiency gains.

It rather involved being on the other side of this airtight hatchway: Changing administrative settings

Unlocking the door from the inside.

Not all model upgrades are upgrades

A new model drops with lower per-token pricing and better benchmarks. You switch. A week later someone asks why the agent is burning 12x more tokens on the same task while producing worse output. We ran 150 agent tasks across 15 scenarios on two models, Claude Sonnet 4.6 and Claude...

Jul 13, 2026

Pure Virtual C++ 2026 [Meet the Speakers, Part 2]: The AI-Native C++ Developer Workflow

Marian Luparu

Pure Virtual C++ 2026 streams Tuesday, July 21, 2026 at 9:00 AM PT, a free, one-day virtual conference for the whole C++ community, live on YouTube (Microsoft Reactor) and Twitch, with on-demand recordings on the Visual Studio YouTube channel afterward. Register now → Welcome...

C++ Team Blog

Jul 13, 2026

The Visual Studio Dev/Test Benefit: Freedom to Build, Test, and Experiment in Azure

James Rempt

One of the best parts of a Visual Studio Subscription is discovering benefits that can make your day-to-day development work easier and more cost effective. One benefit that deserves more attention is Azure Dev/Test pricing. In fact, it's one of the most valuable benefits...

Visual Studio Blog

Jul 13, 2026

Why don't we just make the entire stack out of guard pages?

Raymond Chen

Guard pages all the way down?

The Old New Thing

Jul 10, 2026

Go 1.26.5-2 Microsoft build now available

Davis Goodin

A new release of the Microsoft build of Go is now available for download.

Microsoft for Go Developers

Jul 10, 2026

The case of the mysterious changes to integers when there shouldn't have been any code generation effect

Raymond Chen

Decoding where those integer came from.

The Old New Thing

Jul 10, 2026

Shrinking Azure Pipeline task extensions using esbuild

David Paquette

TL;DR We bundled an internal Azure Pipelines task extension into a single bundled JavaScript file using esbuild. The task package dropped from tens of megabytes and thousands of files to three files per task ( script.js , task.json , and icon.png ). The change took about 20 lines...

Azure DevOps Blog

Jul 10, 2026

Microsoft Agent Framework for Go public preview

Quim Muntal

Microsoft Agent Framework for Go is entering public preview, bringing Agent Framework concepts to Go developers building agents and multi-agent workflows.

Microsoft for Go Developers

Jul 9, 2026

Pure Virtual C++ 2026 [Meet the Speakers, Part 1]: Build Faster, Run Faster

Marian Luparu

Meet the speakers behind Pure Virtual C++ 2026. In part one, Ryan Shepherd and David Li show how to build faster and smaller with C++20 modules and GitHub Copilot build performance.

C++ Team Blog

Jul 9, 2026

Modernize .NET applications in the GitHub Copilot app

Mika Dumont

Modernize .NET applications in the GitHub Copilot app. Follow your upgrade from assessment through execution in an interactive upgrade canvas.

.NET Blog

Jul 9, 2026

SharePoint Copilot Apps Now in Public Preview: From Intent to Action in Microsoft 365 Copilot

Vesa Juvonen

SharePoint Copilot Apps are now in public preview, introducing a new way to bring guided, action-oriented business experiences into Microsoft 365 Copilot. By combining natural language reasoning with structured UX, validation, permissions, and deterministic operations, organizations can help users move from intent to trusted outcomes directly in the Copilot flow.

Microsoft 365 Developer Blog

Jul 9, 2026

I've decoded a `#pragma detect_mismatch` error and fixed the mismatch, but I still get the error

Raymond Chen

You need to rebuild everything that was dependent on the change.

The Old New Thing

Jul 9, 2026

Agent Harness: Scaling the claw or harness capabilities

Wes Steyn

Part 3 of Build your own claw and harness with Microsoft Agent Framework. In Part 2 our personal finance assistant learned to work with your data safely: it reads your portfolio, asks before it trades, and remembers what matters across sessions. It's useful - but everything it knows is...

Microsoft Agent Framework

Jul 9, 2026

What's New in vcpkg (June 2026)

Augustin Popa

These June updates add a vcpkg-tool switch to skip installation when packages are already cached, OpenHarmony (OHOS) platform support, and major library updates including curl 8.21, CGAL 6.2, and Graphviz 15.

C++ Team Blog