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How to test agent skills without hitting real APIs

Your agent skill calls an API. The moment you start evaluating it, every run either costs money or mutates production data. Learn how to mock APIs transparently so you can run evals without changing your skill or hitting real endpoints.
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Jul 16, 2026
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Visual Studio Administrator? Join our Private Marketplace Preview!

Ruben Rios
Organizations are increasingly looking for greater control over extensions within development environments. Driven by security, compliance, and internal governance requirements, teams want more visibility into how developers discover and acquire extensions. To address these needs,...
Visual Studio Blog
Jul 16, 2026
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Speculating on how the buggy control panel extension truncated a value that it had right in front of it

Raymond Chen
Inferring the code's history.
The Old New Thing
Jul 15, 2026
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MSVC Build Tools Preview updates - July 2026

Eric Brumer
Try the latest updates to MSVC Build Tools Preview
C++ Team Blog
Jul 15, 2026
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Visual Studio Code 1.129

Visual Studio Code Team
Learn what is new in Visual Studio Code 1.129. Read the full article
VS Code Blog
Jul 15, 2026
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MSSQL Extension for VS Code: Shortcuts Configuration, Enhanced Results Grid Experience, and More

Yo-Lei Chen
The MSSQL extension for VS Code v1.44 continues to improve the SQL development experience with features that help you work faster and customize your workflow. In this release, we're introducing the Public Preview of Shortcuts Configuration and an Enhanced Results Grid experience....
Azure SQL Dev Corner
Jul 15, 2026
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Agent Skills for Python Is Now Released

Giles Odigwe
Your Python agents can now pick up reusable bundles of domain expertise (instructions, reference material, and scripts that load only when a task calls for them) through a stable, production-ready API. Agent Skills for Python in Microsoft Agent Framework is stable and shipping: the...
Microsoft Agent Framework
Jul 15, 2026
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Pick, manage, and get the most from your models

Rachel Kang (SHE/HER)
You open the model picker, scroll past a dozen options, and pause. How are these models different? Which one should you actually use? And once you're a few hundred messages deep, how much capacity is even left before things start dropping off? We've all been there. These are the kinds...
Visual Studio Blog
Jul 15, 2026
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The case of the invalid function pointer when shutting down the display control panel

Raymond Chen
Watching the bits disappear.
The Old New Thing
Jul 15, 2026
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Building AX evals that actually work

Waldek Mastykarz
This is the eighth and final 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,...
Microsoft for Developers