David Fowler

When I got a job at Microsoft, there was an article in the local news paper and my parents framed it.

@eduyupanqui No, no yaml here. There’s enough yaml in the world 😅

@davidfowl Maybe the project needs a programming-language-agnostic notation; for example, creating an Aspire Compose in YAML that is interpreted behind the scenes by a engine written in C#.

The team has been grinding away at the next release of aspire (which is imminent!). Close to ~930 PRs merged, support for TypeScript, overhauled CLI experience, deployment improvements, VS code extensions improvements, and more. conf.aspire.dev #aspire

@joonaslindholmm Try it without rider see if it’s as slow

@davidfowl Tried aspire again after a long while, pretty good but the startup performance seems awful. Am I doing it wrong @davidfowl? I got mssql, netcore api, viteapp (react) and it takes soo long. M3 Pro + Rider.

I spent this past week building with Squad and… wow. Coordinated AI agents living inside your repo, working in parallel, sharing context, and staying inspectable. This is what agentic development is supposed to feel like. Proud of the team pushing this forward. Try it today and you will be on🔥tomorrow. aka.ms/AA1096on

See how Aspire makes polyglot systems feel like one product in this #AspireConf session with @Chris_L_Ayers - One AppHost, Many Languages. March 23 | 1:00-1:30 PM PT ⌚ Set your reminder: conf.aspire.dev/?cid=aspirecon…

@iAmBipinPaul @JetBrainsRider A question for the folks at @jetbrains

@davidfowl Why is the experience on VS much better compared to @JetBrainsRider? On Rider, it takes time to start, and when it does, it shows that the app is running, but when opening it, it shows like nothing is running on that port. Sometimes, even Rider refuses to start.

@burkeholland @maddymontaquila

@maddymontaquila @davidfowl

Manager introduces a new team member... "FYI - this person is a pathological liar. Just - just check everything they do and don't let them anywhere near production." Completely uncharted waters. We can fix this though. I believe this will be the year.

We just shipped gpt-5.4-mini in the @github Copilot CLI today. I've found the model is surprisingly capable. The first prompt I try with every new model is "build me a snake game". Somehow gpt-5.4-mini produced my favorite version of any model so far.

Don't miss this #AspireConf session with our wizard @mitchdennydev 🪄 - Aspire Escapes the Inner Loop and Does Deployment. March 23 | 2:30 - 3:00 PM PT ⌚ Set your reminder: conf.aspire.dev/?cid=aspirecon…

@robmen Motivations and goals have changed in the last 2 years 😅.

@davidfowl Ahh, it supports internal use cases generically, so publishing earns goodwill even if it doesn't drive direct business? I hypothesized Aspire helped improve the optics of C#, but going multilang apphost poked a hole in that theory. :) Big investment. I was looking for the ROI.

@davidfowl What is the Microsoft business case for Aspire? Does it help onboard more customers to Azure?

Microsoft has released a free, open-source course: GitHub Copilot CLI for Beginners. Includes 8 Chapters covering: • Walks through of installing Copilot CLI • Using context • Creating custom agents • Working with skills • Connecting MCP servers, and more. Start Learning - github.com/github/copilot…

T-minus ONE WEEK until #AspireConf! 🚀💫 Have you explored our session list yet?! Check out the details and save the date 👉️ aspire.dev/aspireconf/?ci… #Python #TypeScript #DotNet #AspireDev

Folks are sleeping on /fleet. I regularly use it, sometimes getting different models to work on different parts in parallel. No need to serialize certain things when you can run in parallel, sprinkle some work tree magic and get the results back quicker.

However Sinners performs at Academy Awards, Ryan Coogler already won by negotiating back the film IP rights in 25 years and releasing this incredible educational promo bit on different screen aspect ratios and film formats.

We’ve trained a multimodal AI model to turn routine pathology slides into spatial proteomics, with the potential to reduce time and cost while expanding access to cancer care.

‘SINNERS’ won 4 Oscars tonight. • Best Actor (Michael B. Jordan) • Best Cinematography • Best Original Screenplay • Best Original Score See the full winners list: bit.ly/OscarWins26