Waldek Mastykarz
@wldk.nl
#Microsoft365 Developer Advocate @ #Microsoft, Microsoft 365 community member, #DevProxy, #CLIMicrosoft365, Microsoft 365 #Copilot
https://blog.mastykarz.nl
https://github.com/waldekmastykarz
https://blog.mastykarz.nl
https://github.com/waldekmastykarz
November 22, 2025 at 8:44 PM
LLM is not LLMing today
September 18, 2025 at 6:33 AM
LLM is not LLMing today
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!
September 10, 2025 at 7:43 AM
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!
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...
More info: learn.microsoft.com/microsoft-cl...
July 24, 2025 at 10:54 AM
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...
More info: learn.microsoft.com/microsoft-cl...
My latest prompt. Don’t ask why 🤣
July 3, 2025 at 5:07 PM
My latest prompt. Don’t ask why 🤣
For now, I guess I'll fallback to @devproxy.bsky.social learn.microsoft.com/microsoft-cl...
July 2, 2025 at 7:37 AM
For now, I guess I'll fallback to @devproxy.bsky.social learn.microsoft.com/microsoft-cl...
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.
June 30, 2025 at 6:33 AM
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.
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...
1. Start recording
2. Use your app
3. Get the spec
It's that easy! Check it out: www.youtube.com/watch?v=E2AO...
June 20, 2025 at 12:39 PM
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...
1. Start recording
2. Use your app
3. Get the spec
It's that easy! Check it out: www.youtube.com/watch?v=E2AO...
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.
Now running Ollama. Next stop, Foundry Local.
June 18, 2025 at 7:15 AM
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.
Now running Ollama. Next stop, Foundry Local.
.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...
What's the easiest way to create them? With @devproxy.bsky.social of course! learn.microsoft.com/microsoft-cl...
June 18, 2025 at 6:38 AM
.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...
What's the easiest way to create them? With @devproxy.bsky.social of course! learn.microsoft.com/microsoft-cl...
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.
June 16, 2025 at 11:36 AM
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.
Once in a while you need to clean up 🧹
June 10, 2025 at 7:09 AM
Once in a while you need to clean up 🧹
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...
Learn more: learn.microsoft.com/microsoft-cl...
May 20, 2025 at 6:50 AM
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...
Learn more: learn.microsoft.com/microsoft-cl...
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?
- exe is easier if you have it already installed
- container is universal but requires adding PFX and volume mounts for cert and config
Thoughts?
May 9, 2025 at 5:35 AM
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?
- exe is easier if you have it already installed
- container is universal but requires adding PFX and volume mounts for cert and config
Thoughts?
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
May 8, 2025 at 9:03 AM
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
Spent some time today trying to visualize LLM usage cost through @devproxy.bsky.social and .NET Aspire. Early result but progress!
May 7, 2025 at 3:34 PM
Spent some time today trying to visualize LLM usage cost through @devproxy.bsky.social and .NET Aspire. Early result but progress!
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
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
May 6, 2025 at 5:55 AM
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
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
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?
The best way to start?
May 6, 2025 at 5:55 AM
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?
The best way to start?
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!
April 17, 2025 at 7:27 AM
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!
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?
April 9, 2025 at 7:49 AM
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?
ChatGPT is on fire today 🔥
March 18, 2025 at 9:27 AM
ChatGPT is on fire today 🔥
Always be yourself unless you can be the cheese, then be the cheese.
February 26, 2025 at 8:06 AM
Always be yourself unless you can be the cheese, then be the cheese.