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Pete Vilter @petevilter.me · Aug 18

Added wind and solar generators, which respond to wind and sun availability curves. As you edit those curves, the dispatch updates. (Need to work on the color coding to make the correspondences more clear)

Pete Vilter @petevilter.me · Aug 17

Here's a power grid simulator (mostly vibecoded), showing two generators being dispatched to satisfy load changing over time. The cheaper generator (blue region) is dispatched first; the more expensive one (pink region) only when needed.

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Pete Vilter @petevilter.me · Aug 3

Nice. Are those datalog-based?

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Pete Vilter @petevilter.me · Aug 3

React and TypeScript, with a REST API to a NodeJS backend where DuckDB is running.

My initial prompt to Claude was something like "I want to explore DuckDB data in a UI that looks like DataDog, with React and TypeScript" etc

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Pete Vilter @petevilter.me · Aug 3

and of course the classics, 'filter to this value' and 'sort asc/desc'.

I lose my mind when table UIs don't have 'filter to this value' 😂

Pete Vilter @petevilter.me · Aug 3

you can also filter by clicking on the histograms, inspired by Datadog's log search UI

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Pete Vilter @petevilter.me · Aug 3

Used Claude Code to vibecode a UI for @duckdb.org in a few days. Here it is navigating foreign keys

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Pete Vilter @petevilter.me · Jul 2

are tarriffs going to send prices back up?

Pete Vilter @petevilter.me · Jun 11

Datadog up next?

Pete Vilter @petevilter.me · Jun 11

Grafana has one too grafana.com/blog/2025/05...

A context-aware LLM agent built directly into Grafana Cloud: Introducing Grafana Assistant | Grafana Labs

With our new integrated AI agent you can write in natural language to ask observability questions, see certain data, build dashboards, and make changes—all without leaving the Grafana UI.

grafana.com

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Pete Vilter @petevilter.me · Jun 11

Neat to see LLMs ingesting observability data and generating explanations www.honeycomb.io/blog/its-the...

It's The End Of Observability As We Know It (And I Feel Fine)

The history of observability tools over the past decade has been about a pretty simple concept, but LLMs bring the death of that paradigm.

www.honeycomb.io

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Pete Vilter @petevilter.me · May 30

@peet.io I see you added support for taking profiles for JS a while ago: github.com/microsoft/vs... very cool!

Think there's a chance of getting this upstreamed to the main debug adapter protocol so other languages can implement it?

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Pete Vilter @petevilter.me · May 26

whoops, that lock implementation had a bug — forgot to set holder back to null, messing up next acquire. now fixed gist.github.com/vilterp/bf02...

Pete Vilter @petevilter.me · May 25

whoops, repo is still private. source here gist.github.com/vilterp/bf02...

bank.ts

GitHub Gist: instantly share code, notes, and snippets.

gist.github.com

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Pete Vilter @petevilter.me · May 24

bank source here: github.com/vilterp/cons...

github.com

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Pete Vilter @petevilter.me · May 24

try here: dist-sys-simulator.netlify.app

Dist Sys Simulator

dist-sys-simulator.netlify.app

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Pete Vilter @petevilter.me · May 24

If we make the client grab a lock around reading & writing the new balance, it's impossible to get a double spend:

the first client to acquire the lock wins; the next sees that there's not enough in the account.

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Pete Vilter @petevilter.me · May 24

Distributed systems should feel like physical puzzles we can manipulate!

As an example, I modeled a bank in my simulator.

Without a lock, there's a race condition: if the two clients' gets and puts of the balance are interleaved, the same money can be withdrawn twice.