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Awesome GitHub Copilot just got a website, and a learning hub, and plugins!
Back in July, we launched the Awesome GitHub Copilot Customizations repo with a simple goal: give the community a place to share custom instructions, prompts, and chat modes to customize the AI responses from GitHub Copilot. We were hoping for maybe one community contribution per...
Read moreClick to read more about this postWhen Infrastructure Scales But Understanding Doesn't
We all know this, even if we don't like to admit it: modern infrastructure can scale infinitely, but human understanding doesn't.
We've all seen it happen - organizations going from managing dozens of servers to thousands of containers, from deploying weekly to deploying hundreds of...
Read moreClick to read more about this postAuthentication Tokens Are Not a Data Contract
Authentication tokens exist to answer one question: is this caller authorized to do this?
They are not intended to be a stable data interface, a schema you can depend on, or an input into application logic.
If your application decodes tokens and reads claims from them, this is an...
Read moreClick to read more about this postLatest posts
Dec 31, 2025
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2025 year-end link clearance
Another year gets relegated to history.
The Old New Thing
Dec 31, 2025
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Understanding and mitigating a stack overflow in our task sequencer
The recurring problem of synchronous resumption.
The Old New Thing
Dec 30, 2025
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Top .NET Blog Posts of 2025
Let's look back at the most-read .NET blog posts published in 2025, from .NET 10 to AI, performance, and developer tooling.
.NET Blog
Dec 30, 2025
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Additional notes on color-keyed overlays as a way of doing smooth video rendering
Choosing the color-key and other brief discussions.
The Old New Thing
Dec 29, 2025
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How can I detect that the system is running low on memory? Or that my job is running low on memory?
You can register for a memory notification.
The Old New Thing
Dec 26, 2025
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Why are we worried about memory access semantics? Full barriers should be enough for anybody
You have to find new ways of going faster.
The Old New Thing
Dec 25, 2025
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Why is the last letter of my string not making it to the clipboard?
The struggle for null termination.
The Old New Thing