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Stop prompt injection from hijacking your agent, new security capabilities now released within Agent Framework

Prompt injection is the #1 risk on the OWASP LLM Top 10, and most agents in production today defend against it with one of two heuristics: a defensive system prompt, or a hand-rolled allowlist. Neither is deterministic. Both fail silently the day someone slips a [SYSTEM OVERRIDE] line...
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Announcing Agent Governance Toolkit MCP Extensions for .NET

Announcing a Public Preview .NET package that adds policy enforcement, startup tool scanning, fallback governance, and response sanitization to MCP servers with a single builder extension.
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Latest posts

Mar 31, 2026
Post comments count21
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Before you check if an update caused your problem, check that it wasn't a problem before the update

Raymond Chen
It was going to be like that when I got here.
The Old New Thing
Mar 30, 2026
Post comments count0
Post likes count2

Azure Developer CLI (azd) - March 2026: Run and Debug AI Agents Locally, GitHub Copilot Integration, & Container App Jobs

PuiChee (PC) Chan
Run, invoke, and monitor AI agents locally or in Microsoft Foundry with the new azd AI agent extension commands. Plus GitHub Copilot-powered project setup, Container App Jobs deployment, local preflight validation, and configurable timeouts.
Azure SDK Blog
Mar 30, 2026
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Writing Azure service-related unit tests with Docker using Spring Cloud Azure

Rujun Chen
This post shows how to write Azure service-related unit tests with Docker using Spring Cloud Azure.
Azure SDK Blog
Mar 30, 2026
Post comments count4
Post likes count3

A question about the maximimum number of values in a registry key raises questions about the question

Raymond Chen
Why is this even a question?
The Old New Thing
Mar 27, 2026
Post comments count1
Post likes count4

What if a dialog wants to intercept its own message loop?

Raymond Chen
You can steal them from your owner.
The Old New Thing
Mar 26, 2026
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Azure SDK Release (March 2026)

Ronnie Geraghty
Azure SDK releases every month. In this post, you find this month's highlights and release notes.
Azure SDK Blog
Mar 26, 2026
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Breaking Change Ahead: Graph API Updates to Sensitive Email Properties

Thomas Mechelke
On 12/31/2026, we will begin restricting updates to sensitive properties on non-draft email messages (including subject, body, and recipients). Apps will need Mail-Advanced.ReadWrite (or .All / .Shared) with admin consent to continue modifying these fields. Review your current usage and update permissions now to avoid unexpected failures.
Microsoft 365 Developer Blog
Mar 26, 2026
Post comments count0
Post likes count5

TypeScript AppHost in Aspire 13.2: same app model, different syntax

Sebastien Ros
Aspire 13.2 enables TypeScript developers to define AppHosts directly in TypeScript, with the same streamlined Aspire application model.
Aspire Blog
Mar 26, 2026
Post comments count3
Post likes count3

Why doesn't WM_ENTER­IDLE work if the dialog box is a Message­Box?

Raymond Chen
Because it opted out.
The Old New Thing