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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 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