
Principal Consultant @avivasolutions | 3x Microsoft MVP | Speaker | 29 yrs experience | C#/.NET | Event Sourcing | Fluent Assertions | OSS dev
The Hague, The Netherlands
Joined October 2008
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Dennis Doomen retweeted
We just announced something huge! 🥳
JetBrains Air is our new approach to agentic development.
It’s built around support for a wide variety of agents, workflows designed for agent-driven development, and the IDE intelligence developers rely on to stay in control of the result.
Read more about the vision from our CEO 👇
Today we introduce JetBrains Air - the product system for software development orgs in the age of agents.
Built for developers, team leads & engineering directors.
Open and flexible: steer and control almost any LLM & harness.
Read more:
jb.gg/air-announce
Dennis Doomen retweeted
Rider 2026.3 EAP is open! 🎉
🌈 Rainbow brackets
🎯 Data breakpoints right from the editor
✅ TUnit test coverage
🎮 Game Development plugin category
🔍 Filters in code completion
Try the first build: jb.gg/rd-263-eap
Meet the stars ⭐️ lighting up the .NET track
🔷 Anders Abel
🔷 @ddoomen
🔷 @ErikEJ
🔷 @fekberg
🔷 @IrisClasson
🔷 @djohnnieke
🔷 Kathleen Dollard
🔷 @citizenmatt
🔷 @sandertenbrinke
🔷 @0x_F0
Explore the full .NET track 👉 oredev.org/line-up?tags=NET
Dennis Doomen retweeted
Rider 2026.2 EAP 6 is out!
This preview build improves how async call stacks are presented during debugging. The debugger now reduces noise from generated async and task infrastructure frames, making it easier to follow the logical flow of your code instead of digging through compiler-generated implementation details.
You can download the EAP build from our website here 👉 jetbrains.com/rider/nextvers…
Dennis Doomen retweeted
Formal Complaint: GitHub Copilot Token-Based Billing Model
@GitHubCopilot
Subject: Critical Issue with New Token-Based Billing — Product Has Become Unusable
Summary of the Issue
I am writing to formally complain about the recent shift to token-based billing for GitHub Copilot, which was rolled out this morning. This change has fundamentally broken the value proposition of the product and is rendering it unusable for paying subscribers, including myself.
Specific Problems Observed
Within just a few hours of the new billing model going live, the developer community is already reporting alarming consumption patterns:
Pro+ subscribers paying $39/month are reporting that 60% of their monthly credits were depleted in only 2 hours of normal usage.
One user reported losing 20% of their entire monthly allowance from a single file review — no code generation, just a review.
At this rate, a paying customer will exhaust their plan in less than a single working day, despite paying a premium subscription fee.
This is not "normal usage at scale" — this is a broken pricing model that punishes the very developers who rely on Copilot daily for their work.
Why This Makes the Product Unusable
The core promise of Copilot was a predictable, always-available AI coding assistant integrated into the developer workflow. Token-based billing destroys that promise because:
Developers cannot predict costs. Every keystroke, every file review, every refactor becomes a financial calculation rather than a productivity boost.
The tool actively discourages use. Users will hesitate before invoking Copilot, defeating the entire point of an AI assistant.
The $39/month Pro+ tier is misleading. Customers signed up expecting reliable access, not a pre-paid metered service that runs out mid-morning.
Heavy users — your most loyal customers — are penalized the most.
The Competitive Reality
While GitHub Copilot is moving toward a restrictive metered model, competitors are moving in the opposite direction:
Cursor offers Composer 2.5 with unlimited usage once token limits are reached on their plans, ensuring developers can keep working without interruption.
Other tools (Windsurf, Cody, Continue) offer flat-rate or far more generous usage tiers.
Developers will not stay on a platform that runs out of credits before lunch when alternatives offer uninterrupted productivity at the same or lower price point.
My Demand
If GitHub does not revise this licensing model, the product is effectively dead. I am requesting:
Reinstatement of a flat-rate unlimited (or effectively unlimited) tier for Pro and Pro+ subscribers.
Transparent, upfront communication of what each interaction actually costs in tokens.
A grace period or credit refund for users who burned through their allowance under the new model without warning.
A long-term commitment that core IDE-integrated features will not be metered into uselessness.
Without these changes, I — along with a growing number of developers — will be canceling our subscriptions and migrating to Cursor or competing alternatives. The decision to monetize aggressively at the expense of usability will not be remembered as a successful pivot; it will be remembered as the moment GitHub Copilot lost its market.
Please escalate this to the product and pricing teams immediately.
Dennis Doomen retweeted
Isn't it about time @github or @githubstatus give a little update on the Copilot billing situation?
Dennis Doomen retweeted
🌊 Another wave of expert sessions is taking over #UCK26!
Jonathan Tower, Chris Woodruff, @DKrzyczkowski, @konradkokosa, @ddoomen, and @ptrstpp950 shared their expertise and inspired the community.
Dennis Doomen retweeted
I watched “Star Wars: The Mandalorian and Grogu”in IMAX. Back in 2019, I had only seen the opening of The “Mandalorian” while examining the LED-shot “virtual production” technology, but this time I had no problem diving in. Action, car chases, close-quarters combat, sword fights, gun battles, death matches, aerial combat, giant monsters, giant mechs. A complete “everything versus everything” showcase. CGI, puppets, special makeup, animatronics, stop motion. Even the behind-the-scenes craftsmanship feels like it has everything packed in. X-Wings, AT-ATs, AT-RTs, speeders, stormtroopers, droids. Nearly every element from across the entire history of the Star Wars saga is in as well. An entertainment spectacle made with craftsmanlike skill by Jon Favreau.
Dennis Doomen retweeted
Cooking up something new 🧑🍳
Join the waitlist for early access to technical preview of the GitHub Copilot app 👇
gh.io/github-copilot-app?utm…
Dennis Doomen retweeted
It's finally here! Process API Improvements in .NET 11 devblogs.microsoft.com/dotne…
Dennis Doomen retweeted
#UCK26 | From building properly versioned and well-documented HTTP APIs in ASP.NET Core to practical ways of keeping large C# projects maintainable, @ddoomen will share approaches, tools and engineering practices that help teams stay in control as products evolve.
Expect practical insights into API design, OpenAPI, versioning strategies, .editorconfig, SonarCloud, NUKE pipelines, code quality and sustainable architecture decisions.
🎤 Learn more about the sessions: krakow.updateconf.net
💻 Watch live: now.updateconference.net
📍 27–28 May 2026, Krakow
🎟️ Want 10% off? Use discount code: DennisDoomen10
See you all in Krakow
#UpdateConference #UpdateConferenceKrakow #dotnet #architecture #cleancode #aspnetcore #apidesign
Dennis Doomen retweeted
Claude Opus 4.7 has just been released, and it’s already available in JetBrains AI Chat, Claude Agent and Junie.
With a new reasoning approach and xhigh effort, it’s built for very complex tasks where deeper thinking pays off.
Demos in 🧵
Dennis Doomen retweeted
Tune in tomorrow for our dotUltimate 2026.1 release party! 🎈
We will be covering:
🧩 GA of @resharper for @code
✨ BYOK, ACP, MCP, and Next-Edit Suggestions
🎮 Debugging and Profiling
🚀 File-Based Apps
📦 @nuget PMC
Enable the 🔔 here! youtube.com/live/-cp6nVS6Os0
Dennis Doomen retweeted
We’re experimenting with a different UX using AI in @jetbrains IDEs.
Most AI features wait for a prompt or a trigger action. Instead, we are exploring a different direction: AI that automatically surfaces helpful context.
We’ve just released an experimental plugin with two such features.
Details in the thread 🧵
Dennis Doomen retweeted
This will be interesting 😯
blog.jetbrains.com/junie/202…
Dennis Doomen retweeted
Junie ranked top on SWERebench using Gemini 3 Flash, spending ~10x fewer tokens than other agents while maintaining high performance.
We’re offering free access to Gemini 3 Flash for one week, until next Monday.
Try it out and let us know what you think: jb.gg/ecer6x
Dennis Doomen retweeted
Air just launched.
This week we’re highlighting some key features.
No single agent is best at everything. Air lets you easily switch between Codex, Claude Agent, Gemini CLI, and Junie, so you can choose the right agent for each task.
Try Air for free: jb.gg/4dhmrw
Dennis Doomen retweeted
On Debugging Problems jeremydmiller.com/2026/02/24…
Look world, I can still blog about something w/o it being self promotion!
Dennis Doomen retweeted
🛠️ Rider 2025.3.3 is now available.
The build comes with a few major bug fixes.
You can download the update from our website here:
jetbrains.com/rider/download…


































