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Marco Rossignoli

@marcorossignoli.bsky.social
257 followers 134 following 8 posts

GitHub CodeAI Eval@Microsoft CoreAI Platform and Tools - DevDiv, Agents and LLMs evaluation systems, .NET Microsoft.Testing.Platform creator, former .NET Coverlet coverage co-maintainer

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Reposted by Marco Rossignoli
Visual Studio Code @vscode.dev · 01/05/2026
Want to see what happens behind each prompt? 🔍 Agent Debug Logs lets you inspect chat interactions, tool calls, model requests, prompt discovery, agent flows, and more. code.visualstudio.com/docs/copilot...
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Merill Fernando 💚 @merill.net · 18/03/2026
MCP auth for enterprise is confusing and most of the confusion comes down to one thing: mixing up agent identity and MCP authentication. It’s incredibly easy to blur the lines between agent identity and MCP authentication, which is exactly where things can get messy for an architecture team. 1/7
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Visual Studio Code @vscode.dev · 16/01/2026
This Extension of the Week is a serious time-saver. It cuts down the repetitive stuff and speeds up your workflow fast. Watch to see👇
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Cassidy @cassidoo.co · 16/01/2026
You might have seen it in the past, but in case you haven't looked recently, GitHub has a couple really nice font sets: Mona Sans & Hubot Sans: github.com/mona-sans Monaspace: monaspace.githubnext.com
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Sebastian Raschka (rasbt) @rasbt.bsky.social · 12/10/2025
Multi-Head Latent Attention 🔗 github.com/rasbt/LLMs-f...
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Marco Rossignoli @marcorossignoli.bsky.social · 04/10/2025
What a dream
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MartinDotNet @martindotnet.bsky.social · 04/10/2025
"If it takes longer to make your coffee than it does for you build pipeline to complete, you're doing one of them wrong" - @abangser.bsky.social
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Phillip Carter @phillipcarter.dev · 13/09/2025
Fantastic technical post about experiments in making LLMs deterministic by making kernel operations act invariant of batch sizes: thinkingmachines.ai/blog/defeati... Curious if we'll see something like this roll out more broadly in the future!
thinkingmachines.ai
Defeating Nondeterminism in LLM Inference
Reproducibility is a bedrock of scientific progress. However, it’s remarkably difficult to get reproducible results out of large language models. For example, you might observe that asking ChatGPT the...
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Marco Rossignoli @marcorossignoli.bsky.social · 11/09/2025
devblogs.microsoft.com/dotnet/perfo...
devblogs.microsoft.com
Performance Improvements in .NET 10 - .NET Blog
Take a tour through hundreds of performance improvements in .NET 10.
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Reposted by Marco Rossignoli
Kirill Osenkov @kirillosenkov.com · 05/09/2025
I just learned that Directory.GetFiles with pattern 1.txt.* matches 1.txt, and it's the OS behavior:
dir 1.txt.* matches 1.txt
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Damian Edwards @damianedwards.com · 04/09/2025
File-based C# apps & support for stdin to `dotnet run -` makes it incredibly easy to check behavior of APIs in .NET 10!
Screenshot of running a file-based C# app from stdin to dotnet run -
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Kevin Gosse @kevingosse.net · 03/09/2025
Not entirely sure what I'm going to do with all that money.
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Reposted by Marco Rossignoli
What a week, huh? all Wednesdays @whataweekhuh.bsky.social · 03/09/2025
Captain Haddock looking very frazzled, saying, “What a week, huh?”
Tintin leans into the frame and says, “Captain, it’s Wednesday.”
Snowy is very excited about the drink he has found.
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The Monkey Island SCUMM Bar @scummbar.com · 26/08/2025
Daily scene from “Monkey Island 2: LeChuck’s Revenge” (VGA): Part II — Four Map Pieces #MonkeyIsland
The SCUMM Bar screenshot of the day
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Barry Dorrans @blowdart.me · 26/08/2025
Finally a good use for LLMs github.com/MorDavid/Bru...
github.com
GitHub - MorDavid/BruteForceAI: Advanced LLM-powered brute-force tool combining AI intelligence with automated login attacks
Advanced LLM-powered brute-force tool combining AI intelligence with automated login attacks - MorDavid/BruteForceAI
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Marco Rossignoli @marcorossignoli.bsky.social · 22/08/2025
devblogs.microsoft.com/dotnet/dotne...
devblogs.microsoft.com
Enhance your CLI testing workflow with the new dotnet test - .NET Blog
Learn how .NET 10 transforms dotnet test with native Microsoft.Testing.Platform integration, delivering better performance and enhanced diagnostics.
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Reposted by Marco Rossignoli
Gus Perez @gusperez.com · 14/08/2025
Semantic code search is now built into Visual Studio Copilot Chat, making it easier to find code based on meaning. devblogs.microsoft.com/visualstudio... #visualstudio
devblogs.microsoft.com
Improving Codebase Awareness in Visual Studio Chat - Visual Studio Blog
Our new Remote Semantic Search integration helps you find exactly what you need faster and with greater precision than ever before.
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Reposted by Marco Rossignoli
Visual Studio @visualstudio.com · 14/08/2025
If you're building AI tools in #VisualStudio, adopting MCP can help you scale fast—but it also introduces a new class of threats you might not expect. Get actionable strategies and tooling tips to keep AI systems secure, resilient, & enterprise-ready. 🎥 msft.it/63327s3QfX
spot art.
Photo of presenter(s).
text reads: MCP security best practices
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Visual Studio Code @vscode.dev · 14/08/2025
⌛ We're live in 10 minutes! It's another VS Code Release Party. Today the team will demo new features and updates from the v1.103 release including coding agent integration, MCP updates, beast mode, evaluating GPT-5! Join us ▶️ www.youtube.com/watch?v=EYMi...
youtube.com
🔴 VS Code - VS Code Live - v1.103 Release 🎉
🎉 It's time for another release party! Join the VS Code team as they dive into the latest features from the v1.103 release, including: Coding agent integration MCP updates Terminal tools…
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The International House of Mojo @mixnmojo.com · 12/08/2025
Scene of the Day: “Thimbleweed Park” (PC): Part Three — The Arrest
Image described in post
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Visual Studio Code @vscode.dev · 12/08/2025
We've made some "beastly" upgrades to our GPT agent prompt and we're seeing big improvements in completion rates across scenarios. You can use it today in Insiders with any GPT model... "github.copilot.chat.alternateGptPrompt.enabled": true, "chat.todoListTool.enabled": true
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Gus Perez @gusperez.com · 12/08/2025
GPT-5 in Visual Studio is now available. #visualstudio devblogs.microsoft.com/visualstudio...
devblogs.microsoft.com
GPT-5 Now Available in Visual Studio - Visual Studio Blog
We’re excited to share that GPT-5, OpenAI’s latest frontier model, is now rolling out in GitHub Copilot for Visual Studio.GPT-5 offers faster responses and even better performance for writing and unde...
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Reposted by Marco Rossignoli
ILSpy - .NET Decompiler @ilspy.bsky.social · 04/08/2025
A #csharp 14.0 feature to expect in the next #ILSpy preview for #dotnet 10 is extension members (not final, see github.com/icsharpcode/...)
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Marco Rossignoli @marcorossignoli.bsky.social · 30/07/2025
Explore the future of cloud at azuredevsummit.com — a powerhouse event featuring not just AI, but a full spectrum of cloud innovations, hands-on workshops, and top-tier speakers Early Bird pricing ends this week!
azuredevsummit.com
Azure Dev Summit | Lisbon 13 - 16 Oct 2025
Azure Dev Summit is a 4-Day Event for Software Developers, 13-16 Oct in Lisbon, Portugal.
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Reposted by Marco Rossignoli
WalkingCat @h0x0d.bsky.social · 27/07/2025
The LLVM Compiler Infrastructure - Chris Lattner - 2004/07 www.youtube.com/watch?v=f9I2...
youtube.com
The LLVM Compiler Infrastructure - Chris Lattner - 2004/07
YouTube video by WalkingCat
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SwiftOnSecurity @swiftonsecurity.com · 24/07/2025
Troubleshooting walkthrough: Cascade Into Darkness This is a real issue I solved in Windows, the hurdles I faced, and what I'd do differently. 🐥🐥YOU CAN MUTE JUST THIS CONVERSATION THREAD🐥🐥 It starts with the user editing "HKLM\HARDWARE" and misunderstanding an instruction and breaking Windows.
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Jordan Matthiesen @jordanmatthiesen.me · 23/07/2025
Hey folks! Know anyone looking for a product manager with deep experience working on C#, JavaScript, mobile, web and AI developer tools? I'm on the market and looking for new opportunities! You can read up on my history here: linkedin.com/in/jordanmat... Feel free to DM me as well.
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Jon Skeet @jonskeet.uk · 19/07/2025
Blogged: Unexpected inconsistency in records - codeblog.jonskeet.uk/2025/07/19/u... - if you use C# records and the "with" operator, I'd suggest reading this to avoid a footgun you may be unaware of
codeblog.jonskeet.uk
Unexpected inconsistency in records
Unexpected inconsistency in records The other day, I was trying to figure out a bug in my code, and it turned out to be a misunderstanding on my part as to how C# records work. It’s entirely …
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Martin Costello 🏳️‍🌈🇪🇺🪿 @martincostello.com · 18/07/2025
Looks like eslint-plugin-prettier and eslint-config-prettier might have been compromised 😬 github.com/prettier/esl...
github.com
four new versions published with no code changes to repo · Issue #339 · prettier/eslint-config-prettier
The diff looks a little odd: https://npmdiff.dev/eslint-config-prettier/10.1.5/10.1.7 Is this expected? https://www.npmjs.com/package/eslint-config-prettier?activeTab=versions
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Scott Hanselman 🌮 @scott.hanselman.com · 17/07/2025
I just wanted to say, I’m probably more proud of this Ted talk than just about anything I’ve ever done so I’m gonna be absolutely useless for the next couple of weeks as I promote the shit out of this because I want you to watch it because it matters in the moment we are in youtu.be/dVG8W-0p6vg
youtu.be
Tech Promised Everything. Did it deliver? | Scott Hanselman | TEDxPortland
YouTube video by TEDx Talks
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David Fowler @davidfowl.com · 22/06/2025
Next version of the dotnet runfile supports publishing these .cs files to a native binary (via Native AOT learn.microsoft.com/en-us/dotnet...), no dependencies on the runtime, self-contained. #dotnet #csharp
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Kirill Osenkov @kirillosenkov.com · 21/06/2025
New in MSBuild Structured Log Viewer: Project Reference Graph New tab that shows the project graph layered by project "height". Each project only references projects above it. Clicking a project highlights all directly referenced projects above, and all projects below it that reference this one.
many rows of multiple rectangles per row, each rectangle is the project name, some rectangles are bigger and bluer (they are referenced more). One rectangle is selected and green, it has outgoing arrows above it that point to other rectangles, with purple border. Those are the referenced projects. Arrows also go down, to rectangles with green borders. Those are projects that reference the selected one.
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ILSpy - .NET Decompiler @ilspy.bsky.social · 11/06/2025
Speaking of "supporting actor" - #ILSpy in @david.wengier.com talk "What's Inside: A .NET assembly! (and how does Hot Reload change it?)" www.youtube.com/watch?v=Buxm...
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Sergiy Teplyakov @steplyakov.bsky.social · 06/06/2025
Hey #dotnet people:) Just published another episode on Dissecting the Code YouTube channel - "Can Tiered Compilation Cause Memory Leaks in .NET". This video is about a change in behavior between full framework on .net 9 in respect to GCInfo and how it affect memory usage.
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Damian Edwards @damianedwards.com · 03/06/2025
fly.io/blog/youre-a...
fly.io
My AI Skeptic Friends Are All Nuts
My smartest friends have bananas arguments about LLM coding.
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Marco Rossignoli @marcorossignoli.bsky.social · 22/05/2025
😍
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Chet Husk @chethusk.bsky.social · 21/05/2025
No talks today for me at #msbuild, but I'll be floating around the Hub most of the day. Come find me around the modernization or .NET booths and let's talk about the SDK, MSBuild, .NET upgrades, or whatever else is on your mind!
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Cult.Repo @cultrepo.bsky.social · 18/05/2025
The trailer for "Python, the Documentary" is here! 🔥🐍 From its humble beginnings in the Netherlands to powering AI at the world’s biggest companies - this is the story of Python. 🎥 The film premiers at @europython.eu in July and will follow on our YouTube channel. Subscribe to stay updated!
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Jan Jones @janjones.me · 16/05/2025
Completions and live diagnostics are now much improved and enabled by default in .NET Lab (lab.razor.fyi). Stay tuned for more enhancements to the editing experience coming soon.
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Immo Landwerth @terrajobst.net · 14/05/2025
My heart goes out to anyone who was let go today ❤️ A lay off (or even a performance-based firing) isn’t a statement about you as a person or your character. YOU ARE NOT YOUR WORK. DM‘s are open, happy to chat.
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Kirill Osenkov @kirillosenkov.com · 14/05/2025
We have an SDE II position on my team. No external link, but if I know you, you can send me your resume.
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Jen Gentleman @jenmsft.bsky.social · 11/05/2025
Happy mother's day to all those motherboards out there
A microATX motherboard with some faulty capacitors
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Jess Morrissette @decafjedi.com · 12/05/2024
Happy Mother's Day!
A screenshot of Blanka hugging his mom from the end of Street Fighter 2.
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Mark Jack @markjackmilian.bsky.social · 10/05/2025
Discover why C# is a game-changer for startups. Its versatility, robust libraries, and community support empower rapid, scalable development. Perfect for building powerful apps efficiently. #CSharp #Startups
devblogs.microsoft.com
Why we built our startup in C# - .NET Blog
Tracebit built their B2B SaaS security product using C#.
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Sy Brand @tartanllama.xyz · 08/05/2025
Was super fun nerding out about debuggers for half an hour 🥰
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Clemens Vasters @clemens.vasters.com · 08/05/2025
🚀 Shaping Data for Apps & AI Move beyond basic JSON Schema. JSON Structure adds richer, precise metadata for modern apps and AI. Ask the 🤖: chatgpt.com/g/g-681b98c1f9188191a096a34eb256deee-json-structure #JSONStructure #AI #Metadata #DataModeling #APIs #Developers
chatgpt.com
ChatGPT - JSON Structure
This is your JSON Structure consultant, a modern data definition language.
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Tim Misiak @timdbg.com · 08/05/2025
Really enjoyed interviewing @tartanllama.xyz about "Building a Debugger". This is a wonderful book for anyone who wants to learn more about how the OS, compiler, and debugger work together. It's not just for people who want to build a debugger!
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GOTO Conferences @gotocon.com · 08/05/2025
Implementing a debugger teaches deep systems knowledge! @timdbg.com and @tartanllama.xyz explore fundamentals, stack unwinding complexity, and the future with time-travel debugging.
youtu.be
Building a Debugger • Sy Brand & Tim Misiak • GOTO 2025
This interview was recorded for the GOTO Book Club. #GOTOcon #GOTObookclubhttp://gotopia.tech/bookclubRead the full transcription of the interview here:https...
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Talia al Ghoul 🏳️‍⚧️ @usili.bsky.social · 06/05/2025
also you all need to see this, because this is something I don't think *anybody* could predict for where this ad goes
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Satan @thedevil.bsky.social · 07/05/2025
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