iiinova — where your digital self keeps evolving

Waldek Mastykarz @wldk.nl · 22/11/2025

preview.redd.it/why-neck-hur...

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Waldek Mastykarz @wldk.nl · 18/09/2025

LLM is not LLMing today

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Waldek Mastykarz @wldk.nl · 10/09/2025

Working on a new feature for @devproxy.bsky.social for which I needed a specific config. Short prompt + two empty files + Dev Proxy MCP server. Got a working setup in seconds. The best time to be a dev!

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Waldek Mastykarz @wldk.nl · 24/07/2025

In all other cases, @devproxy.bsky.social to the rescue! Use this configuration and inspect HTTP requests using Chrome Dev Tools. More info: learn.microsoft.com/microsoft-cl...

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Waldek Mastykarz @wldk.nl · 03/07/2025

My latest prompt. Don’t ask why 🤣

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Waldek Mastykarz @wldk.nl · 02/07/2025

For now, I guess I'll fallback to @devproxy.bsky.social learn.microsoft.com/microsoft-cl...

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Waldek Mastykarz @wldk.nl · 30/06/2025

Integrating LLMs lets us build powerful apps but it's hard to understand their costs. The OpenAITelemetryPlugin for @devproxy.bsky.social logs usage, token, and cost data for OpenAI API requests - no code changes needed. Understand your LLM costs before you deploy your app to production.

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Waldek Mastykarz @wldk.nl · 20/06/2025

Need an API spec for your API? Use @devproxy.bsky.social! Probably the easiest way out there to create it: 1. Start recording 2. Use your app 3. Get the spec It's that easy! Check it out: www.youtube.com/watch?v=E2AO...

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Waldek Mastykarz @wldk.nl · 18/06/2025

Checking which model is the best for us in @devproxy.bsky.social, because, like we say in Dutch, measuring is knowing. Now running Ollama. Next stop, Foundry Local.

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Waldek Mastykarz @wldk.nl · 18/06/2025

.http files are super convenient when working with APIs. They allow you to quickly issue API requests with little abstraction helping you understand what's going over the wire. What's the easiest way to create them? With @devproxy.bsky.social of course! learn.microsoft.com/microsoft-cl...

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Waldek Mastykarz @wldk.nl · 16/06/2025

Encoding matters. This caught us during our recent demo at CloudSummit: while submitting an emoji in an API request emulated using @devproxy.bsky.social we got a broken response. Turns out, emojis are utf-8 and need a proper encoding. Change the content-type to include the encoding and avoid errors.

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Waldek Mastykarz @wldk.nl · 10/06/2025

Once in a while you need to clean up 🧹

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Waldek Mastykarz @wldk.nl · 20/05/2025

Curious how much using an LLM in your app will cost? Wonder no more! Use latest @devproxy.bsky.social beta to estimate the cost before you go live! Use the standard .NET Aspire dashboard, OpenLIT or any other OpenTelemetry-compatible dashboard. Learn more: learn.microsoft.com/microsoft-cl...

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Waldek Mastykarz @wldk.nl · 09/05/2025

Here's how we could add @devproxy.bsky.social as a resource to an Aspire app. Thinking about supporting both using it as executable and a container: - exe is easier if you have it already installed - container is universal but requires adding PFX and volume mounts for cert and config Thoughts?

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Waldek Mastykarz @wldk.nl · 08/05/2025

Coming soon to @devproxy.bsky.social: estimating LLM use and cost in your application. You can use the standard Aspire dashboard, OpenLIT or any other OpenTelemetry dashboard. Hat tip to @pelikhan.bsky.social

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Waldek Mastykarz @wldk.nl · 07/05/2025

Spent some time today trying to visualize LLM usage cost through @devproxy.bsky.social and .NET Aspire. Early result but progress!

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Waldek Mastykarz @wldk.nl · 06/05/2025

If you've got an API spec, you can import it using the TypeSpec CLI: typespec.io/docs/emitter... If you don't have an API spec, you can quickly create TypeSpec file for your API using @devproxy.bsky.social: learn.microsoft.com/en-us/micros... Check it out: typespec.io

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Waldek Mastykarz @wldk.nl · 06/05/2025

Have you looked at TypeSpec yet? It's a pretty cool language to design APIs. It allows you to use inheritance in different parts of the definition making your APIs more consistent and less verbose. And it gives you design-time feedback! The best way to start?

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Waldek Mastykarz @wldk.nl · 17/04/2025

MCP servers connected to Azure AI Search seem like a very nice combo for providing GitHub Copilot agent with additional information. Check this out: configuring @devproxy.bsky.social using natural language!

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Waldek Mastykarz @wldk.nl · 09/04/2025

HTTP files are awesome! Did you know that you can use in them values from .env files and avoid hard-coding keys, and other env-specific values?

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Waldek Mastykarz @wldk.nl · 18/03/2025

ChatGPT is on fire today 🔥

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Waldek Mastykarz @wldk.nl · 26/02/2025

Always be yourself unless you can be the cheese, then be the cheese.

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Waldek Mastykarz @wldk.nl · 11/02/2025

Users hate waiting—slow APIs can make your app feel sluggish and unresponsive, leading to churn. #DevProxy allows you to simulate slow API responses so that you can see how your apps handles them.

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Waldek Mastykarz @wldk.nl · 10/02/2025

See how your app handles API rate limits: learn.microsoft.com/microsoft-cl...

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Waldek Mastykarz @wldk.nl · 05/02/2025

When APIs fail, apps can crash or behave unpredictably, leading to data loss and frustrated users. #DevProxy simulates various API failure scenarios, allowing you to see how your app reacts in real-time.

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Waldek Mastykarz @wldk.nl · 05/02/2025

If you can be anything, be the cheese.

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Waldek Mastykarz @wldk.nl · 03/02/2025

Testing how an app handles API failures is difficult and often requires writing extra code that won't be shipped. Dev Proxy intercepts API requests and injects errors without requiring changes to your app's code.

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Waldek Mastykarz @wldk.nl · 29/01/2025

Getting some representative scores for SLM responses that match and deviate from reference texts 💪

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Waldek Mastykarz @wldk.nl · 28/01/2025

Did you know that you can inspect requests intercepted by #DevProxy using Chrome Dev Tools? Check it out: learn.microsoft.com/microsoft-cl...

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Waldek Mastykarz @wldk.nl · 27/01/2025

The easiest way to test how your app handles API errors: use #DevProxy! Works with any tech stack and OS. And the best part? No need to change your code! Check it out: learn.microsoft.com/microsoft-cl...

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Waldek Mastykarz @wldk.nl · 27/01/2025

Are you using #DevProxy? Tell us what's working and what could be better! We've got some great feedback so far and would love to hear from you too! Let us know. Looking forward to learning from you: aka.ms/devproxy/sur...

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Waldek Mastykarz @wldk.nl · 23/01/2025

If you're integrating your APIs with cloud services, you might need to debug the API requests. No easier way than by using Dev Proxy! Check it out: learn.microsoft.com/microsoft-cl...

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Waldek Mastykarz @wldk.nl · 16/01/2025

If you've got a minute, we'd love to learn from you what's working in #DevProxy and where we could do better: aka.ms/devproxy/sur...

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Waldek Mastykarz @wldk.nl · 12/01/2025

`method1`. Of course it is 🤦‍♂️

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Waldek Mastykarz @wldk.nl · 10/01/2025

If you're using Dev Proxy, we'd love to learn from you what's working and where we could do better. 1 question, 30 secs: aka.ms/devproxy/sur... 😊

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Waldek Mastykarz @wldk.nl · 28/12/2024

Took me some time to figure out but finally got it: if you're overriding a value, like font size, in CSS and want the new value to be at least x, you can use `max(x, 1em)`. If the current value, denoted by 1em, is smaller, CSS will use x, otherwise, it'll keep the current value.

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Waldek Mastykarz @wldk.nl · 27/12/2024

I bet you the Millennium Falcon was modeled after a cat

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Waldek Mastykarz @wldk.nl · 22/12/2024

Watching Nutcracker ballet performance with the family

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Waldek Mastykarz @wldk.nl · 21/12/2024

Weekend or not, here I come!

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Waldek Mastykarz @wldk.nl · 07/12/2024

Ordered Cards Against Humanity: Family Edition. Can’t wait to play with my kids 😁

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Waldek Mastykarz @wldk.nl · 07/12/2024

Oh, to be able to fall asleep anywhere, anytime, no matter the noise 😻

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Waldek Mastykarz @wldk.nl · 06/12/2024

Just saw this option to control music in Edge Dev no matter in which tab it's playing and which tab is visible. How convenient!

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Waldek Mastykarz @wldk.nl · 06/12/2024

Need a random string? This is probably the easiest way to get one:

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Waldek Mastykarz @wldk.nl · 04/12/2024

We'd like to learn from you! Take a minute and tell us what's working and where we could do better for Teams developer tooling: aka.ms/teams-toolin.... We appreciate your help 😊

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