Ruby

Hakierspejs spotyka się na żywo w siedzibie stowarzyszenia! Zapraszamy wszystkich zainteresowanych naszą aktywnością. Uczestnictwo jest darmowe, rejestracja nie jest obowiązkowa – wystarczy po prostu przyjść. Nie mamy żadnego konkretnego planu: po prostu zbieramy się i haczymy - co komu przyjdzie do głowy. Zaczynamy o 19:00, ale warto sprawdzić [https://at.hs-ldz.pl](https://at.hs-ldz.pl) – być może ktoś otworzy siedzibę wcześniej. Jeżeli masz problem z wejściem, zadzwoń domofonem przy bramie od ulicy na nr 100, zadzwoń telefonem na 42-203-20-50 albo wejdź na naszego chata (patrz poniżej). Potrzebujesz więcej informacji? Skontaktuj się z nami na czacie lub mailowo. Szczegóły znajdziesz tutaj: [https://lodz.hackerspace.pl/](https://lodz.hackerspace.pl/) Więcej szczegółów uzgodnimy na naszym chacie Telegramowym/Matrixowym: [https://t.me/hakierspejs](https://t.me/hakierspejs) [https://matrix.to/#/%23hs-ldz:hackerspace.pl](https://matrix.to/#/%23hs-ldz:hackerspace.pl)

## Sandboxed Agents with yoloAI Hello, 世界! For meetup #59 on Tuesday [Apr 28, 2026 19:00 CET](https://www.meetup.com/leipzig-golang/events/312537718/) we are thrilled to welcome back [Karl Stenerud](https://www.linkedin.com/in/kstenerud/), who will be presenting (remote) one of his recent projects: [yoloAI](https://yoloai.dev/): > Run AI coding agents freely in a disposable sandbox. Review exactly what changed. Apply what you want. Some people are aware of the security nightmares that probabilisic language models with full system access may have, but you also need to act on it. > Permission fatigue is a real problem. Sandbox escape is a real problem. yoloAI solves it. The project is written in Go and open source at [kstenerud/yoloai](https://github.com/kstenerud/yoloai), works with various sandbox backends like docker, podman, tart, seabelt - and security modes, using [runc](https://github.com/opencontainers/runc), [gvisor](https://gvisor.dev/), [kata](https://katacontainers.io/), [firecracker](https://firecracker-microvm.github.io/). After looking at a agent memory upgrade system in [#58](https://golangleipzig.space/posts/meetup-58-wrapup/), we continue our exploration of [agentic coding](https://missing.csail.mit.edu/2026/agentic-coding/) and ai assisted software development, which is a rapidly developing field. ### Schedule * 18:45 Doors open * 19:00 Welcome * 19:10 yoloAI (remote presentation) * 20:00 Open discussion We’ll meet: * in person at [Basislager Leipzig](https://basislager.co), at [Peterssteinweg 14, 04107 Leipzig](https://maps.app.goo.gl/1fMkeDSPZ7Aauszh8) ([OSM](https://www.openstreetmap.org/node/3504864558)) * and online via [Google Meet](https://meet.google.com/tgb-juwg-khy) Join us to discuss security, agents, isolation techniques and more.

Zapraszamy wszystkich zainteresowanych muzyką i syntezatorami na codwutygodniowy jam session w naszym spejsie. Umiejętności muzyczne nie wymagane! Mile widziane przyniesienie własnego sprzętu, ale jak nie masz, to też znajdziejsz coś do robienia (będzie dobrze). Jeżeli masz problem z wejściem, zadzwoń domofonem przy bramie od ulicy na nr 100, zadzwoń telefonem na 42-203-20-50 albo wejdź na naszego chata (patrz poniżej). Potrzebujesz więcej informacji? Skontaktuj się z nami na czacie lub mailowo. Szczegóły znajdziesz tutaj: [https://lodz.hackerspace.pl/](https://lodz.hackerspace.pl/) Więcej szczegółów uzgodnimy na naszym chacie Telegramowym/Matrixowym: [https://t.me/hakierspejs](https://t.me/hakierspejs) [https://matrix.to/#/%23hs-ldz:hackerspace.pl](https://matrix.to/#/%23hs-ldz:hackerspace.pl)

Spotkania z serii wymiany wiedzy podczas wspólnego rozwiązywania zadań CTF – jest to świetna zabawa pozwalająca równocześnie rozwinąć wiedzę w zakresie cyberbezpieczeństwa. Poziom trudności CTF-owego zadania ustalimy na początku spotkania. Najprawdopodobniej wybierzemy coś z platformy Hack The Box. Spotykamy się **co tydzień w środę o 19:00.** \-\-\- Zaczynamy o 19:00, ale warto sprawdzić https://at.hs-ldz.pl – być może ktoś otworzy siedzibę wcześniej. Jeżeli masz problem z wejściem, zadzwoń na 42-203-20-50 albo wejdź na naszego chata (patrz poniżej). Potrzebujesz więcej informacji? Skontaktuj się z nami na czacie lub mailowo. Szczegóły znajdziesz tutaj: https://lodz.hackerspace.pl/ Więcej szczegółów uzgodnimy na naszym chacie Telegramowym: https://t.me/hakierspejs

Zapraszamy na kolejne spotkanie planszówkowe! Mamy parę gier w spejsie, ale zachęcam przynieść również własne gry! Chętnie zagramy w coś nowego. Jest też miejsce na zostawienie gier na jakiś czas w spejsie, żeby nie musieć ich targać tutaj co tydzień. \-\-\- Zaczynamy o 19:00, ale warto sprawdzić [https://at.hs-ldz.pl](https://at.hs-ldz.pl) – być może ktoś otworzy siedzibę wcześniej. Jeżeli masz problem z wejściem, zadzwoń na 42-203-20-50 albo wejdź na naszego chata (patrz poniżej). Potrzebujesz więcej informacji? Skontaktuj się z nami na czacie lub mailowo. Szczegóły znajdziesz tutaj: [https://lodz.hackerspace.pl/](https://lodz.hackerspace.pl/) Więcej szczegółów uzgodnimy na naszym chacie telegram/matrix: [https://t.me/hsldz_planszowki](https://t.me/hsldz_planszowki) [https://matrix.to/#/#hs-ldz-board-games:matrix.org](https://matrix.to/#/#hs-ldz-board-games:matrix.org)

Będziemy wspólnie oglądać film dokumentalny "Dominion" o życiu zwierząt hodowlanych na farmach. Uwaga: film zawiera drastyczne sceny. Jeżeli masz problem z wejściem, zadzwoń domofonem przy bramie od ulicy na nr 100, zadzwoń telefonem na 42-203-20-50 albo wejdź na naszego chata (patrz poniżej). Potrzebujesz więcej informacji? Skontaktuj się z nami na czacie lub mailowo. Szczegóły znajdziesz tutaj: [https://lodz.hackerspace.pl/](https://lodz.hackerspace.pl/) Więcej szczegółów uzgodnimy na naszym chacie Telegramowym/Matrixowym: [https://t.me/hakierspejs](https://t.me/hakierspejs) [https://matrix.to/#/%23hs-ldz:hackerspace.pl](https://matrix.to/#/%23hs-ldz:hackerspace.pl)

At the meetings we try to expand our knowledge in cybersecurity by solving CTF (Capture The Flag) on the HackTheBox platform. We meet every 2 weeks on Wednesday. We invite all interested people, regardless of their level! We do not have an agenda for the meeting, we will determine during which machine we will do. We focus mainly on practice, so you need to actively participate in the meeting: * bring your laptop with you * prepare a virtual machine with Kali Linux (or any system you like, but systems with the Linux kernel will be best) \-\-\- How to find us If you have trouble getting in, call 42-203-20-50 or go to our chat room - https://t.me/hakierspejs. Need more information? Contact us via chat or email. Find details here https://lodz.hackerspace.pl/

Complete your event RSVP here: [https://gdg.community.dev/events/details/google-gdg-cloud-berlin-presents-cloud-next-26-amp-rooftop-networking-building-agents-with-adk/](https://gdg.community.dev/events/details/google-gdg-cloud-berlin-presents-cloud-next-26-amp-rooftop-networking-building-agents-with-adk/) Hi. We are delighted to invite you to our hybrid (virtual and onsite RSVP available) April gathering at [Ojin AixHaus in Mitte](https://ojin.ai/community). We’ll be unpacking the top highlights from Google Cloud Next '26 its 22-24 of April [(register to get virtual spot)](https://www.googlecloudevents.com/next-vegas/) and sharing expert insights on the Agent Development Kit. **The Agenda** * 6:00 pm: Doors open for snacks, drinks, and a bit of a chinwag * 6:45 pm: Kick-off with the Ojin AixHaus crew * 7:00 pm: Google Cloud Next '26: The highlights! * 8:00 pm: [Iliyan Peychev](https://www.linkedin.com/in/iliyanpeychev/): Evolving Cloud Run Apps into Agents with ADK *Agents are here to stay, and Google’s ADK makes building them from scratch more accessible than ever. But in the real world, we rarely start with a blank slate. What if we have battle-tested Cloud Run applications already using Gemini that we need to evolve? How can we get the benefits of the Agentic world without a full rewrite? This session focuses on moving from manual controllers and service orchestration to Multi-Agent systems with Google’s ADK. We will explore the practical "why" and "how" of this architectural shift, along with the real-world caveats and pitfalls.* * 9:00 pm: 🍕🍻 Rooftop Drinks & Networking (with a view!) * 10:00 pm: Doors close **🙏 Thanks & Credits** A massive thank you to **[Ojin AixHaus Community ](https://ojin.ai/community)**crew for letting us in their brilliant space! **Follow Ojin AixHaus on socials: [Instagram ](https://www.instagram.com/ojin.ai/#)[Lin](https://ojin.ai/community)[kedin ](https://www.linkedin.com/showcase/ojin-aixhaus/)[X](https://x.com/Ojin_AI)** We’d love to see you there! ***

## Sandboxed Agents with yoloAI Hello, 世界! For meetup #59 on Tuesday [Apr 28, 2026 19:00 CET](https://www.meetup.com/leipzig-golang/events/312537718/) we are thrilled to welcome back [Karl Stenerud](https://www.linkedin.com/in/kstenerud/), who will be presenting (remote) one of his recent projects: [yoloAI](https://yoloai.dev/): > Run AI coding agents freely in a disposable sandbox. Review exactly what changed. Apply what you want. Some people are aware of the security nightmares that probabilisic language models with full system access may have, but you also need to act on it. > Permission fatigue is a real problem. Sandbox escape is a real problem. yoloAI solves it. The project is written in Go and open source at [kstenerud/yoloai](https://github.com/kstenerud/yoloai), works with various sandbox backends like docker, podman, tart, seabelt - and security modes, using [runc](https://github.com/opencontainers/runc), [gvisor](https://gvisor.dev/), [kata](https://katacontainers.io/), [firecracker](https://firecracker-microvm.github.io/). After looking at a agent memory upgrade system in [#58](https://golangleipzig.space/posts/meetup-58-wrapup/), we continue our exploration of [agentic coding](https://missing.csail.mit.edu/2026/agentic-coding/) and ai assisted software development, which is a rapidly developing field. ### Schedule * 18:45 Doors open * 19:00 Welcome * 19:10 yoloAI (remote presentation) * 20:00 Open discussion We’ll meet: * in person at [Basislager Leipzig](https://basislager.co), at [Peterssteinweg 14, 04107 Leipzig](https://maps.app.goo.gl/1fMkeDSPZ7Aauszh8) ([OSM](https://www.openstreetmap.org/node/3504864558)) * and online via [Google Meet](https://meet.google.com/tgb-juwg-khy) Join us to discuss security, agents, isolation techniques and more.

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/

**\*\*\* We've Moved! Bold Penguin - 6555 Longshore St, Dublin, OH 43017 \*\*\*** TBD **AGENDA:** * See updates to parking below * Doors open at 5:30, feel free to come and hang out before! * Official start of the meeting is at 6:30pm * After the meeting is done, we will go hang out at a nearby space in Bridge Park! If you can, please sign up via meetup by noon the day of the meeting so we can have an estimate headcount for food :) We always order extra, so feel free to join us even if you don't get signed up! Thank you to Bold Penguin for providing the food and location! **Parking & Arrival:** **Parking:** Parking in Bridge Park is free. The closest lots are the Mooney Garage and the Hotel/Endres Garage. **Entry:** The doors to the office are to the right of PINS. The street level door and elevators lock at 6pm. If you arrive after that, someone should be there to let you in, else call the number posted. Take the elevator to the 2nd floor. Once you exit the elevator, turn right. \*\*\* We are a bunch of professionals, students, and geeks who are excited about Ruby programming language ([http://ruby-lang.org/](http://ruby-lang.org/)) and Rails framework ([http://rubyonrails.com/](http://rubyonrails.com/)) and the joy they have brought back to web development. Our main goal is to share the love of the Ruby and Rails ecosystems with anyone that is interested. We cater to everyone, whether a non-programmer through advanced Rubyists. * We give lectures on programming topics * We freely provide decades worth of experience * For full details of this month's meeting please visit [http://columbusrb.com](http://columbusrb.com)

**Latest Dojo Location!** **Knotty Pine Brewing** 1765 W 3rd Ave, Columbus, OH 43212 We're going to try a new dojo location for a few weeks and see how it works Dojos are informal Python group study sessions where everyone interested in Python gathers to learn about Python, help others with Python, or just hang out. Everyone is welcome from Python beginners to experts. Bringing a laptop is encouraged (we'll have extension cords and power strips). If there's something you want to learn leave a comment on this invite so we can plan ahead. We're looking for speakers for our Monthly Meetups! Fill out the form if you are interested in presenting to the Python Community. https://forms.gle/ehSfUAC2WgR34Crq9

It feels like we just saw each other 🤷. Join members of the local design and UX community for our monthly breakfast. For May we’re stopping in for Rooh’s popup breakfast/cafe concept. You know someone is getting the lobster yuzu croissant, and that’s not even the prettiest thing on the menu!.

Our monthly PHP meetup. A virtual shindig courtesy of Zoom. Check back here for the details around 6:15 pm

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/cbus-hug-2026/

**Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. 6:30 to 8:00 pm. Main meeting and presentation(s). Topic: This month John Lairson will share a notebook describing the Alpaca (Paper) Trading API and discuss different algorithms for evaluating stock trades. We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact Central OH Python at centralohpython@gmail.com