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Hi, I'm Den 👋

Tinkerer, Nerd, Pixel Geek.
Den Delimarsky's personal avatar.

I am a super-technical product engineer who is all about solving complex problems, reverse-engineering things, and documenting everything. Some of my work includes:

You can read more about me on the About page.

Recent Blog Posts

MCP Apps And Interactive UIs In MCP Clients

·540 words
Arguably, the first of many exciting chapters in MCP development this year - the ability to render user interfaces within the chat experience. Finally, we’re going beyond just text.

Programmatically Setting GitHub Issue Types

·625 words
A quick guide on how to programmatically set the GitHub issue type with the GitHub CLI, even if built-in functionality for this doesn’t quite exist.

Hello, Anthropic

·901 words
Kickstarting 2026 with a new role as a Member of Technical Staff at Anthropic, where I will be helping grow the MCP ecosystem.

Wrapping Up My Latest Microsoft Chapter

·1392 words
As 2026 rolls in, it’s time for me to turn the page to a new adventure. This also means that it’s a wrap on my current career chapter at Microsoft.

Wrapping Up 2025 - The Year Of MCP

·2383 words
The past year has, arguably, been all about Model Context Protocol. This is a reflection on the past twelve months, and an outlook on the year to come.