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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...
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Jul 8, 2026
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Announcing TypeScript 7.0

Daniel Rosenwasser
Today we are proud to announce the availability of TypeScript 7, a 10x faster native port of TypeScript! Since its early days, TypeScript has promised to deliver on JavaScript that scales. By bringing strong type-checking and rich tooling to the world of JavaScript, TypeScript made it...
TypeScript
Jul 8, 2026
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Building on Vercel's eve + Azure Cosmos DB: An Agent That Remembers

Sajeetharan Sinnathurai
Most "AI agent" demos forget everything the moment the process exits. That's fine for a toy project, but useless for anything real. An agent that helps you write, triage, or support needs two things a language model alone can't give it: durable state and the ability to recall the right...
Azure Cosmos DB Blog
Jul 8, 2026
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The other kind of control flow guard check: The combined validate and call

Raymond Chen
A two-in-one package.
The Old New Thing
Jul 8, 2026
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The hidden variables in your agent eval

Waldek Mastykarz
This is the seventh 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
Jul 8, 2026
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Agent Framework’s Orchestration Patterns Reach 1.0

Evan Mattson
Python's agent-framework-orchestrations package is now 1.0.0. That puts Microsoft Agent Framework's orchestration layer at 1.0 across Python and .NET. Sequential, concurrent, group chat, handoff, and magentic orchestration are now stable in both SDKs. You can pick the coordination...
Microsoft Agent Framework
Jul 7, 2026
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Applications Are Not Packages

Howard Kapustein
Applications are not packages. Let me repeat. Applications are not packages. This is a common misconception due to the (too) often blurring of concepts and terminology. Packages and applications are different and distinct things, so it's important to understand what those words mean...
Inside MSIX
Jul 7, 2026
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How did Windows 95 decide that a setup program ran?

Raymond Chen
It used some heuristics.
The Old New Thing
Jul 7, 2026
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Don't rewrite your CLI for agents

Waldek Mastykarz
There's advice making the rounds: replace your CLI args with a single --json payload so agents can use your tool more effectively. The thinking being, that agents already think in structured formats, and nested data maps cleanly to JSON. Flat args on the other hand, force awkward...
Microsoft for Developers
Jul 7, 2026
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Agent Skills for .NET Is Now Released

Sergey Menshykh
You can now give your .NET agents reusable packages of domain expertise - instructions, reference documents, and scripts they load only when a task needs them - through a stable, production-ready API. Agent Skills for .NET in Microsoft Agent Framework has moved out of experimental preview...
Microsoft Agent Framework
Jul 7, 2026
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What's New in Microsoft Foundry | June 2026

Nick Brady
Claude is now generally available in Microsoft Foundry. Here's everything else that shipped between Build 2026 and the end of June — autopilot agents, expanded Toolboxes and Routines, Agent Optimizer's private preview, and more.
Microsoft Foundry Blog
Jul 6, 2026
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See our new Azure Cosmos DB Design Patterns

Mark Brown
Design patterns are where good data modeling lives or dies. In a NoSQL database like Azure Cosmos DB, the difference between a schema that scales to millions of operations per second and one that fights you at every turn usually comes down to a handful of well‑understood patterns: how...
Azure Cosmos DB Blog
Jul 6, 2026
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I opened a file with FILE_FLAG_DELETE_ON_CLOSE, but now I changed my mind

Raymond Chen
You can't change your mind, but you can do it a different way.
The Old New Thing
Jul 6, 2026
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Need a different partition key in Azure Cosmos DB? Pick the right approach

Abhishek Gupta
Once you create a container, its partition key is fixed at creation, and you can’t change it in place. However, if your original key starts causing problems like cross-partition queries or hot partitions, you need to consider your options for changing it. This post explains the...
Azure Cosmos DB Blog
Jul 6, 2026
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Not all model upgrades are upgrades

Waldek Mastykarz
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...
Microsoft for Developers
Jul 5, 2026
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Azure SDK Release (June 2026)

Justin Bettencourt
Azure SDK releases every month. In this post, you'll find this month's highlights and release notes.
Azure SDK Blog
Jul 3, 2026
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How did we conclude that CcNamespace.dll was the ringleader of a group of DLLs that unloaded prematurely?

Raymond Chen
Contextual clues.
The Old New Thing
Jul 3, 2026
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Enabling MLflow OpenAI Autolog on PySpark Workers

Jaya Kumar
When distributing LLM calls across PySpark workers via mapInPandas, MLflow autolog silently fails. Here is how to fix it.
ISE Developer Blog
Jul 2, 2026
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Pure Virtual C++ 2026 Talks Announced

Marian Luparu
The featured talks for Pure Virtual C++ 2026 are here! Join us on July 21 for a free, one-day virtual conference for the whole C++ community.
C++ Team Blog