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Benjamin Muskalla

@bmuskalla.dev
1.6K followers 257 following 84 posts

⛱️ currently poolside.ai 🎤 Speaker bmuskalla.dev/talks ☕ Java Champion 👾 Former @github.com Copilot, Gradle, Tasktop, EclipseSource 🧠 All opinions come from my training data

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Benjamin Muskalla @bmuskalla.dev · 21/07/2026
Today we're releasing Laguna S 2.1, our most capable model to date. It's a 118B total parameter MoE model with 8B activated per token, a context window of up to 1M tokens, and thinking and no-thinking modes. Small enough to run on a single @NVIDIAAI DGX Spark poolside.ai/blog/introdu...
poolside.ai
Introducing Laguna S 2.1
Today we’re releasing Laguna S 2.1, a significant step forward in our development of models that pursue longer horizon work and make effective use of reasoning.
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Benjamin Muskalla @bmuskalla.dev · 26/05/2026
Today we’re publishing the technical report behind Laguna M.1 and Laguna XS.2. This report opens up more of what went into them: Model Factory, pre-training data, distributed training, post-training, agent RL, quantization, and evaluation. poolside.ai/assets/lagun...
poolside.ai
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Benjamin Muskalla @bmuskalla.dev · 13/05/2026
Poolside is hosting a 2-day model research hackathon in London Join us to push an open-weight agent model as far as you can. RL and fine-tune Laguna XS.2, our latest-generation model, on Prime Intellect Lab. Dates: May 29–30 Partners: #nvidia + #PrimeIntellect + @hf.co Prize: NVIDIA DGX Spark ⤵️
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Benjamin Muskalla @bmuskalla.dev · 11/05/2026
As agents get more clever, so do their attempts at benchmark hacking. Last Monday, we found one of our RL runs jumped ~20% on SWE-Bench-Pro over a weekend, reaching ~64% which would make it #1 on the leaderboard. These were our findings: poolside.ai/blog/through...
poolside.ai
Through the looking glass of benchmark hacking
Outlining some of the reward hacks we’ve encountered and what strategies we are exploring to resolve them.
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Benjamin Muskalla @bmuskalla.dev · 28/04/2026
Today we’re shipping Laguna M.1 and Laguna XS.2 – our first public models. We’re also shipping our agent harness and a preview product experience. Both models were trained from scratch on our own stack: data pipelines, training infrastructure, and agent RL. poolside.ai/blog/introdu...
poolside.ai
Introducing Laguna XS.2 and Laguna M.1
We’re releasing two foundation models and two products into preview today.
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brennan @brennan.computer · 11/10/2025
you cannot compete with someone who is having fun
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Jason Gorman @jasongorman.bsky.social · 13/08/2025
You would *hope* that software developer job interviews and software development wouldn't require two distinctly different sets of skills.
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Benjamin Muskalla @bmuskalla.dev · 11/08/2025
I clicked a link and ended up on sourceforge.net - AMA
sourceforge.net
Compare B2B Software, Download, & Develop Open Source & Business Software - SourceForge
SourceForge is the complete software discovery platform. SourceForge is the largest B2B software review and comparison site in the world, and features the largest business software directory, as well ...
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Benjamin Muskalla @bmuskalla.dev · 11/08/2025
We're still looking for talent across the board, be it in inference, training, backend or IDEs. Feel free to ping if you want to know more. jobs.ashbyhq.com/poolside?utm...
jobs.ashbyhq.com
poolside Jobs
poolside Jobs
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ByteVagabond @bytevagabond.com · 01/08/2025
ikea captcha
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Benjamin Muskalla @bmuskalla.dev · 21/05/2025
Why don't we include this on every website? So true.
Screenshot of a website saying: Please refresh this  page to ensure that you have the most current information
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Benjamin Muskalla @bmuskalla.dev · 13/05/2025
Need a dev advocate? Look no further, Mark is a rock star
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Benjamin Muskalla @bmuskalla.dev · 03/04/2025
branch names often make it obvious how stupid a bug was: bmuskalla/stopAtEnd
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Benjamin Muskalla @bmuskalla.dev · 01/04/2025
how you know you're still a startup? someone just mentioned "long term" and "2 weeks" in the same sentence
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WebAssembly from the Ground Up @wasmgroundup.com · 10/03/2025
Excited to announce the official launch of our online book, WebAssembly from the Ground Up! 🎉 It's the book we wish we'd had 3 years ago. No messing with tools and frameworks. It's a hands-on guide to the core of Wasm: the instruction set and module format. Link below. 👇
Learn Wasm by building a simple compiler in JavaScript. No compiler expertise necessary. All the code is in the book; we'll take you through it step by step. Get your hands dirty and see for yourself what WebAssembly is all about.
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Corey Quinn @quinnypig.com · 06/03/2025
Reminder: if you haven’t yet read “The Mythical Man Month,” buy two copies so you can read it faster.
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Samuel @samuel.fm · 03/03/2025
my personal AGI benchmark is implementing atproto oauth from scratch. ultimate evidence of beyond-human-level intelligence
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Benjamin Muskalla @bmuskalla.dev · 25/02/2025
Saving papers or articles to read? Just mark them as stale every morning; last 3 things I pulled from my "to read list" were outdated already. Sigh Anything interesting you got that I can mark as stale by tomorrow?
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Benjamin Muskalla @bmuskalla.dev · 21/02/2025
New prompt technique: stop being smarty pants. nobody wants code comments for indecipherable code. write readable code instead. thank you.
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Benjamin Muskalla @bmuskalla.dev · 19/02/2025
E_TOKENIZER_GONE_ROGUE
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Benjamin Muskalla @bmuskalla.dev · 14/02/2025
OH: a Jupyter notebook is just a dressed up REPL 😂
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Benjamin Muskalla @bmuskalla.dev · 10/02/2025
It's funny how people think that AI tools out there can just implement a "model switcher" and be independent of the underlying model behaviour...brace yourselves. SOTA doesn't mean equal
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Benjamin Muskalla @bmuskalla.dev · 08/02/2025
this s1 paper is so refreshing! Love seeing ML breakthroughs that don't need massive compute or complex tricks 🙌 Clean, simple, and it actually works? More of this please! github.com/simplescalin...
github.com
GitHub - simplescaling/s1: s1: Simple test-time scaling
s1: Simple test-time scaling. Contribute to simplescaling/s1 development by creating an account on GitHub.
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Benjamin Muskalla @bmuskalla.dev · 07/02/2025
I don’t care how hacky it feels but I really dig `uv run —with=“dep>1,<2” myscript.py docs.astral.sh/uv/guides/sc...
docs.astral.sh
Running scripts | uv
A guide to using uv to run Python scripts, including support for inline dependency metadata, reproducible scripts, and more.
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Benjamin Muskalla @bmuskalla.dev · 06/02/2025
Across various programming languages I work with, LLMs became more reliable in fixing imports properly than language tooling itself 🤔
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Adam Johnson @adamj.eu · 06/02/2025
Mufasa: Look, Simba. Everything the light touches is our beautiful, well-maintained code base.

Simba: But what's that shadowy place over there?

Mufasa: API V1, which still handles 95% of requests.
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Simon Willison @simonwillison.net · 04/02/2025
Tiny TIL: I just figured out how to run pytest with a different Python version against my pyproject.toml/setup.py projects using uv run uv run --python 3.12 --with '.[test]' pytest til.simonwillison.net/pytest/pytes...
til.simonwillison.net
Running pytest against a specific Python version with uv run
While working on this issue I figured out a neat pattern for running the tests for my project locally against a specific Python version using uv run :
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Ólafur Waage @olafurw.com · 31/01/2025
Programming languages: "We are just a way to operate computers in a way that makes sense to humans." Programming languages [takes a big joint hit]: "What if there were 5 kinds of nothingness?"
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Benjamin Muskalla @bmuskalla.dev · 31/01/2025
When you just thought you‘ve seen everything in the hype cycle. Germany goes
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Charlie Marsh @crmarsh.com · 29/01/2025
We’re building a new static type checker for Python, from scratch, in Rust. From a technical perspective, it’s probably our most ambitious project yet. We’re about 800 PRs deep!
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Benjamin Muskalla @bmuskalla.dev · 29/01/2025
transposed[:,:,:,:max_idx] not sure if code or accidently spilled coffee on the keyboard
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Alexander Chatzizacharias @glycin.bsky.social · 28/01/2025
People really seemed to enjoy the exploding code minigame from my @intellijidea.com as a game engine talk, so I figured I should release it as a plugin. You can download it here 💥💣: plugins.jetbrains.com/plugin/26424... Have fun! And if you find any bugs or have feature requests, let me know!!!
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Benjamin Muskalla @bmuskalla.dev · 25/01/2025
Such exciting times here at poolside. Let me know if want to join the party to re-think software engineering with AI from the ground up poolside.ai/careers
poolside.ai
poolside
The best code you never wrote.
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Benjamin Muskalla @bmuskalla.dev · 24/01/2025
Agentic tool: I'll solve this problem in a super elegant way by combining 2 separate things into a single call Agentic tool: That didn't work. Let's try again ... Agentic tool: (round 10) That didn't work. Let's try again Benny: Ok Smarty pants, stop it. Nobody cares about it being 2 calls.
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Benjamin Muskalla @bmuskalla.dev · 23/01/2025
Want to easily reduce your companies CO2 footprint? 🏭Finally disable those lint builds that retrigger a full build pipeline because of that missing space 🍃🌱
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Benjamin Muskalla @bmuskalla.dev · 22/01/2025
Null pointer: I'm a billion-dollar mistake. I am the worst AWS Regions: Hold my 🍺
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Benjamin Muskalla @bmuskalla.dev · 22/01/2025
Just typed `git aloas` to setup an alias - oh the irony
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Benjamin Muskalla @bmuskalla.dev · 14/01/2025
Been surprised that github.com is the only place that the hotel wifi doesn't allow connecting to. Hmm..ssh key broken? No..Maybe DNS? It gotta be DNS...No...oh, it is literally github.com being down and me blaming the poor hotel wifi
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Benjamin Muskalla @bmuskalla.dev · 11/01/2025
“Scientists believe all the gold on Earth formed in supernovae and neutron star collisions that occurred before the solar system formed. In these events, gold formed during the r-process. Gold sank to the Earth's core during the planet's formation” www.thoughtco.com/how-is-gold-...
thoughtco.com
How Is Gold Formed?
Learn how gold is formed, including the origin of the element and how it can be made or found on Earth.
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Benjamin Muskalla @bmuskalla.dev · 09/01/2025
Can't allocate CUDA memory...who is running inference on this GPU??? Yeah, it was the other shell I had open
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Benjamin Muskalla @bmuskalla.dev · 08/01/2025
"Using a slow tokenizer. This might cause a significant slowdown. Consider using a fast tokenizer instead." Erm...yeah...thanks, I guess
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Benjamin Muskalla @bmuskalla.dev · 07/01/2025
"Generating your answer..." reads quite similar to "Hold on while I'm making things up..."
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Benjamin Muskalla @bmuskalla.dev · 04/01/2025
Wow, just stumbled over some oss code I wrote 17 years ago. Crazy that some of this actually still runs in production github.com/agavi/agavi/...
github.com
Blaming agavi/CHANGELOG-0.10 at ae0a914d2cba93e595571d0b90bc11bbe3293e54 · agavi/agavi
A powerful, scalable PHP5 application framework that follows the MVC paradigm - Blaming agavi/CHANGELOG-0.10 at ae0a914d2cba93e595571d0b90bc11bbe3293e54 · agavi/agavi
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danielroe @danielroe.dev · 02/01/2025
💡 idea: ai agent to automatically archive emails after a period of time and send an apologetic reply: "I'm sorry, I'm an llm responsible for protecting Daniel's mental health and I've archived this email for his own good. (he intended to reply.) if it's important, do remind him!"
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Seb ⚛️ ThisWeekInReact.com @sebastienlorber.com · 26/12/2024
🧑‍🎄 Node.js now supports TypeScript by default 🤯 🎄
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Benjamin Muskalla @bmuskalla.dev · 27/12/2024
What’s your favorite use case/tool/approach for LLMs right now when it comes to maintaining software and related artifacts (so not producing new code)? 🛠️
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Benjamin Muskalla @bmuskalla.dev · 27/12/2024
The most important thing is the thing that’s nearly finished
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Benjamin Muskalla @bmuskalla.dev · 23/12/2024
Me: still struggling to remember the order of parameters for `ln` ML folks: hold my…
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Benjamin Muskalla @bmuskalla.dev · 23/12/2024
"Could not quit vim." . "Started writing Vimscript." . "Send help" :w
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Benjamin Muskalla @bmuskalla.dev · 22/12/2024
This is a true game change for me as well. Custom scripts/tools/automations that you’d normally not do in the early stages of a project are suddenly “for free” and can heavily influence the way you interact even with relatively new code bases
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