NFL Football

**5-a-side Football** practice at Rajská Zahrada artificial grass pitch. No cleats shoes. Maximum of 15 participants for a 3 teams of 5 rotating. **Kick off at 18h00**. Everybody is welcome, no age, gender nor any restriction of any type to join. Cost: **90 crowns**. Please send the money using the **QR Code** stored here: https://imgur.com/a/G8NWGjM In case of any Opt-out within 24h of the session, or no show, the payment will be due (you still can ask someone to come instead of you, as your spot will be booked)

**Hosted by Sky Czech Republic.** Doors are open from 5:30 pm, talks will start at 6:00 pm. **1\. Marek Svitok \(Sky\) \- Elegance and Safety in Goroutine Management** Concurrent programming is a core strength of Go, but managing multiple goroutines while handling errors and synchronization can quickly become complex and error-prone. The golang.org/x/sync/errgroup package provides a simple and effective abstraction for running multiple goroutines concurrently, propagating the first error encountered, and ensuring all routines complete before proceeding. In this article, we explore why errgroup is a valuable tool, how to use it effectively, and what design patterns emerge from its usage. We also examine how one might implement similar functionality manually, highlighting the pitfalls and edge cases that make a manual approach cumbersome. By comparing manual implementations with the idiomatic errgroup usage, we aim to demonstrate why adopting this package leads to safer, cleaner, and more maintainable concurrent code in Go. **2\. Vilibald Wanca \- Nail the Basics \- S01E03** Go does not use `try/catch` for normal error handling. Instead, it treats errors as explicit return values, while `panic` is reserved for truly exceptional or unrecoverable situations. A panic stops normal execution, runs deferred calls, and can only be intercepted with `recover` inside a deferred function. This makes `panic/recover` closer to an emergency escape hatch than a general exception system. The result is a model that favors clarity and explicit control over hidden flow. By attending the event I agree that photographs and video recordings from this event may be used by Sky Czech Republic for employer branding and promotional purposes across company websites, career pages, social media, third-party profiles, and other communication materials.

**Join us in Prague for a Snowflake User Group evening hosted by Everpure (formely Pure Storage).** This edition will bring together Snowflake product updates and practical lessons from teams using the platform in production. We’ll begin with a look at recent developments across the Snowflake ecosystem, including selected new features and broader trends shaping the data platform space. The evening will also include a customer session from Everpure's Metrics team, focused on large-scale data pipelines in Snowflake, including Snowpipe Streaming and experience from high-volume production environments. We’ll round things off with an informal fireside chat with a guest from Snowflake, followed by networking, community discussion, and the traditional Snowflake quiz. **EVENT DETAILS** * **What’s New in Snowflake** Kick off the evening with an overview of the latest developments in the Snowflake ecosystem. We’ll cover new features, emerging trends in the data platform space, and a few practical insights from real-world projects. * **Customer Story: Data Pipelines at Scale** Our host company Everpure's Metrics team will share how they use Snowflake in their data pipelines. The session will focus on large-scale ingestion using Snowpipe Streaming, handling around 10 TB of data per day, and lessons learned from operating high-volume pipelines in production. * **Fireside Chat with Snowflake** An informal conversation with a guest directly from Snowflake. We’ll discuss recent platform developments, what’s coming next, and interesting topics shaping the future of data platforms. The chat will be hosted and moderated live. * **The Snowflake Quiz** As always, we’ll close with the Snowflake quiz, a few goodies up for grabs, and time to connect with fellow data professionals over drinks. **RSVP** here [See Snowflake in Action: Prague User Group](https://usergroups.snowflake.com/events/details/snowflake-prague-presents-snowflake-in-action-prague-user-group-hosted-by-pure-storage-1/).

Calling all board game enthusiasts in Prague! Join us for an exciting evening of fun and games at Sophie's Hostel! Whether you're a seasoned strategist or just looking for a casual night of entertainment, this event is perfect for everyone. Bring along your favourite board games or discover new ones from our collection. From classic favorites like Settlers of Catan, Carcassone or Ticket to Ride to modern gems like Codenames, Wyrmspan or Azul; from the simple UNO, Jenga or Pachisi to heavyweights like Brass: Birmingham, Root or Inis - there's something for every taste! Connect with fellow expats, make new friends, and challenge your skills in a welcoming and laid-back atmosphere. Don't worry if you're new to the city or don't know anyone — this is the perfect opportunity to mingle and bond over a shared love of tabletop gaming. Every Wednesday from 19 to... whenever they start preparing breakfast at the hostel. Mark your calendars, gather your game crew, and get ready for an unforgettable night of board game bliss! Let's roll!

Před několika měsíci vyústila vyostřená debata o filtrech a Core vs Knots v kontroverzní návrh BIP-110, původně známý jako “BIP-444”, neboli Reduce Data Temporary Soft Fork, který má za cíl dočasně omezit časté způsoby vkládání netransakčních dat na bitcoin. Je tento návrh efektivní? Jaké kroky navrhuje? Co se musí stát pro jeho aktivaci a jaká je situace dnes? Lukáš, náš expert na Rust a bitcoin, vám podrobně přiblíží tento problém z každého hlediska. **🦀 PREZENTACE** Tato přednáška představuje BIP-110 v kontextu debaty Knots VS Core, tedy o spam filterech. BIP-110 se snaží se vypořádat se s domnělým i reálným spamem změnou pravidel Bitcoin konsensu, tím že zakáže použití určitých op-kódů a omezí maximální velikosti dat u jiných opcodes. Na BIP-110 se podíváme 1. Z pohledu technického: Co přesně se snaží změnit a proč, kterým metodám se snaží zamezit, a zda zabraňuje některým legitimním použitím bitcoinu 2. Z pohledu časové osy a komunity: Kdy a kým byl BIP-110 vytvořen, kdy se aktivuje a jaké podmínky pro aktivaci musí splnit, jak fungují User-Activated Soft Forky, co se může stát, pokud k jeho aktivaci dojde, a co se může stát, pokud ne 3. Z pohledu efektivity: Jak zapadá do existujících způsobů vkládání netransakčních dat na blockchain, kterým způsobům nezamezuje, a jak se to projeví na ceně vkládání dat **🦀 NETWORKING** Po přibližně 60minutové prezentaci a Q&A zůstáváme na networking u piva. Zůstáváme do 22:00. * Registrace je zdarma. * Bude pití i něco k jídlu. * Odměny za nejlepší otázky. * Knihy od Braiins zdarma. **🦀 PŘEDNÁŠEJÍCÍ** Lukáš Hozda je expert na Rust, autor knihy Building Bitcoin in Rust a lektor kurzů Rust a Advanced Rust na Univerzitě Karlově. Přes den pracuje v pražské bitcoinové softwarové společnosti Braiins, kde jeho oficiální pracovní titul zní Braiins Superman. * Stáhněte si jeho eBook Building Bitcoin in Rust zdarma. * Sledujte Lukáše na X: https://x.com/LukasHozda Pokud vás zajímá seriózní Rust engineering, přidejte se k nám. 🔗 https://braiins.com *** **ENGLISH** 🇺🇸 **Analysis of BIP-110: Timeline, Details and Impacts. Can it work?** A few months ago, a heated debate about filters and Core vs Knots culminated in the controversial proposal BIP-110, originally known as 'BIP-444', or Reduce Data Temporary Soft Fork, which aims to temporarily restrict common methods of inserting non-transactional data onto Bitcoin. Is this proposal effective? What steps does it propose? What needs to happen for it to be activated, and what is the situation today? **🦀 THE PRESENTATION** This lecture presents BIP-110 in the context of the Knots vs Core debate, specifically about spam filters. BIP-110 attempts to deal with both alleged and real spam by changing Bitcoin consensus rules, by banning the use of certain op-codes and restricting the maximum data sizes of other opcodes. We will look at BIP-110 from: 1. A technical perspective: What exactly it tries to change and why, which methods it tries to prevent, and whether it blocks some legitimate uses of Bitcoin 2. A timeline and community perspective: When and by whom BIP-110 was created, when it activates and what conditions it must meet for activation, how User-Activated Soft Forks work, what may happen if it is activated, and what may happen if it is not 3. An effectiveness perspective: How it fits into existing methods of inserting non-transactional data onto the blockchain, which methods it does not prevent, and how this will be reflected in the cost of inserting data **🦀 THE NETWORKING** After about a 60min presentation and Q&A we will stay to network over a beer, we stay until 22:00. * Register here for free entry. * Drinks and snacks provided. * Giveaways for the best Q&A questions. * Braiins Bitcoin books for free. **🦀 THE SPEAKER** Lukáš Hozda is a Rust expert, author of the book Building Bitcoin in Rust, and a lecturer of Rust and Advanced Rust at Charles University. By day, he works at the Prague-based Bitcoin software company Braiins, where his official job title is Braiins Superman. * Download his free eBook [Building Bitcoin in Rust](https://braiins.com/books/building-bitcoin-in-rust) * Follow Lukáš on X: [https://x.com/LukasHozda](https://x.com/LukasHozda) If you are interested in serious Rust engineering, join us. 🔗 [https://braiins.com](https://braiins.com/)

SPEED FRIENDING - COCKTAILS - PRIZES & MORE Let's meet each other! In an effort for community building we are doing The Wednesday Club once a month great venues such as KONTAKT BAR and LE VALMONT, amazing hidden cocktail bars in the heart of Prague, opening their doors exclusively to you for this event. This event is perfect for a night out if you want to meet some new people. You will be able to spend some one-on-one time with each of them, meet friends for life or just to have some interesting encounters. Everyone is welcome as there are no age restrictions for this event. Each round will take 5 minutes and then a bell will ring and it's time to move on to the next person to discover. Not only will you leave with new friends but there are also some opportunities to win prizes. But for that you’ll have to come discover the event for yourself… Tickets: [Mandatory registration here](https://connect.boomevents.org/en/somethingnew-uqvwe/the-wednesday-club-international-speed-friending-asaur) We are very excited to meet you! Somethingnew

We are a group of runners who meet most weeks for a run around the beautiful Vltava River's edge. You can bring your running shoes straight from the office/home office if you don't have time to stop at home. There will be a place to put your bags in the Cafe. We will run about 9 km along the river and have a drink afterwards. Paces vary! We will meet in the square near Kavarna Liberal (Hermanova 6), near the Vltavska metro/tram stop at 6:30 on Wednesday. See you there!

**6-a-side Football** practice at Pražačka Football artificial grass pitch. Maximum of 36 participants for 6 teams of 6. **Kick off at 12h00**. Everybody is welcome, no age, gender nor any restriction of any type to join. Cost: **90 crowns**. Please send the money using the **QR Code** stored here: https://imgur.com/a/PjU32Fi In case of any Opt-out within 24h of the session, or no show, the payment will be due (you still can ask someone to come instead of you, as your spot will be booked)

2026 April 11 vs 11 match game. Sunday 16:00pm Start~ 18:00pm [ FCRK vs Japan] Please prepare at least 10 minutes before the game. We are only max 12~13player , so it means Player will be play more than 75min~ (checked on board) cost 200czk. Team members who can attend, please write your desired position/age in the comments. (2hour) 1Q~ 3Qplay, each Q game time is 30min.

**Galaksia Praha 23** is letting **players to join** each of **their trainings for free** **as a trial** session to join the **5x5** Galaksia **basketball** team. If you are interested to join the team, you can **sign up here**. Maximum 2 players will be joining the training as trials. Please sign up **to only one training** as only one trial is allowed per player. If you sign up to more than one sessions, only the earliest one will be kept. Once you signed in and are therefore confirmed, **please be at** the address (ZŠ Bítovská indoor basketball court) **at 19h15** to be ready for the training starting at 19h30. After receiving Coaches feedback, we will then reach out back to you following the trial. In case of any Opt-out within 24h of the session, or no show, the trial will be considered passed and it will not be possible to join another training.

It's easy to get the idea that philosophy is largely an abstract and conceptual endeavor–studying theories that try to explain the universe, morality, or language, and then arguing until we either prove those we disagree with wrong or at least reach a smug sense of clarity. But is that all that philosophy has to offer? Back by popular demand, this month we'll be diving deeper into the reflections of **Pierre Hadot** by beginning his essay **Spiritual Exercises**. In this essay, Hadot argues that **ancient philosophers didn't just theorize about what a good life might be, but practiced it through disciplines of attention, meditation, and self-examination aimed at transforming how one sees and lives in the world**. The essay invites us to ask **whether philosophy might still serve that purpose today**. Hadot specialized in **ancient Greek and Roman philosophy--especially Stoicism, Neoplatonism, and early Christian thought**–as was known for his scholarship on **Marcus Aurelius, Plotinus, and ancient spiritual exercises**. His work has influenced many contemporary philosophers, classicists, and the modern revival of philosophy as a lived practice. As noted in the title, this will be the first of two sessions. We're splitting the text into two parts in order to give everyone a chance to fit the text into their busy lives, as well as to give us space to move more slowly through the text together. \*\*\* Below is a PDF copy of Hadot's book Philosophy as a Way of Life. This session will cover up to p.93 (ending at 3. Learning to Die). If you have trouble accessing it, send the host a message–extra copies are available. Link: [https://ia800203.us.archive.org/7/items/PierreHadotArnoldDavidsonPhilosophyAsAWayOfLifeSpiritualExercisesFromSocratesToFoucault1995/Pierre%20Hadot%2C%20Arnold%20Davidson%20Philosophy%20as%20a%20Way%20of%20Life%20Spiritual%20Exercises%20from%20Socrates%20to%20Foucault%20%201995.pdf](https://ia800203.us.archive.org/7/items/PierreHadotArnoldDavidsonPhilosophyAsAWayOfLifeSpiritualExercisesFromSocratesToFoucault1995/Pierre%20Hadot%2C%20Arnold%20Davidson%20Philosophy%20as%20a%20Way%20of%20Life%20Spiritual%20Exercises%20from%20Socrates%20to%20Foucault%20%201995.pdf) \*\*\* We’ll have tea and light snacks, but please feel free to bring any drink or snack you’d like to share! This event will be hosted in an apartment with a well-trained dog who will be happy to meet you. If anyone has concerns about dogs, let me know so I can be mindful about keeping her from bothering you. The buzzer is Everett and Mainous—we’re on the 5th floor, apartment 16. Meeting structure: We will start with a brief summary of the key ideas Hadot presents then move to open discussion. Please read the text in advance, make highlights, and note any thoughts or questions you find interesting and compelling.

**Talk 1 – ArgoTs: TypeScript-Powered GitOps with ArgoCD** By: Jiří Soukal - Senior Cloud Engineer, from PriceFX Kubernetes is the de facto standard for cloud-native infrastructure, but managing it often means drowning in YAML. Tools like Kustomize, Helm, and ArgoCD overlays ease the pain, yet feel like patchwork rather than a fix. TypeScript-native solutions such as Pulumi or Terraform exist, but they rely on external state to diff and apply changes—adding complexity for GitOps teams. This talk introduces a new approach: using TypeScript as the source of truth for Kubernetes infrastructure without external state. By extending ArgoCD to understand TypeScript, we can dynamically generate all resources, from workloads to ArgoCD Applications and even cloud provider resources via ConfigConnector or Crossplane. **Talk 2 –** **Securing AI Deployments: From Prompts to AIBOM** By: Marek Sottl, CEO of Hackihub Are you interested in the security of AI application deployments? This packed session will focus on protecting language models and the obstacles that can arise during their deployment from a security perspective. We will explore deployment strategies in AWS and Azure environments, input validation using NLP, prompt tracing, and above all, we will emphasize the importance of AIBOM and MLBOM. **Talk 3 - GitOps, IaTS, OpenRouter and OpenClaw come to a bar** By Martin Pohl GitOps, IaTS, OpenRouter and OpenClaw come to a bar. The bartender says, “Great… who actually has production access?” GitOps says, “Not me, I only sync what’s in git.” IaTS says, “I just generate the infrastructure.” OpenRouter says, “I only route the requests.” OpenClaw says, “Relax, I already decided for everyone.” The bartender slowly reaches for the incident button: “So… which one of you started the outage?” All four reply: “According to the logs, it was a collaborative effort.” Today’s infrastructure tooling is incredibly powerful platforms like ArgoCD, TypeScript-based GitOps, and modern cloud-native stacks allow us to build and manage systems with unprecedented flexibility. But at the same time, we are introducing entirely new layers of complexity and attack surface. This talk explores the intersection of GitOps, TypeScript-driven infrastructure, and emerging AI tooling such as OpenRouter and autonomous agent-style setups like OpenClaw. As infrastructure evolves from static, declarative definitions into dynamic, runtime-generated systems, we are no longer just managing code we are operating systems that can interpret inputs, generate logic, and in some cases act autonomously. With this shift comes a new set of security challenges: prompt injection, tool misuse, model supply chain risks, and limited observability into AI-driven decision-making. The session connects these emerging risks with concepts like AIBOM and modern AI deployment security practices. Ultimately, this talk asks a critical question: are we building the future of platform engineering or creating systems we no longer fully control? **More about Talk 1:** Combining GitOps with the expressiveness of TypeScript creates infrastructure that is both declarative and dynamic, reducing toil while enabling richer abstractions, safer collaboration, and more maintainable platform engineering practices across the CNCF ekosystem. Benefits to the ecosystem \- Clarity & Maintainability: Reduces YAML complexity and templating hacks by introducing a strongly typed\, programmatic way to define infrastructure\. \- GitOps Alignment: Preserves ArgoCD’s declarative\, state\-free model while unlocking the flexibility of TypeScript\. \- Scalability: Makes it easier to manage multi\-cluster and multi\-environment setups with reusable\, composable infrastructure definitions\. \- Innovation in Platform Engineering: Demonstrates how the Kubernetes ecosystem can evolve beyond YAML\-first thinking\, inspiring new tools and workflows that balance developer experience with operational reliability\. \- Community Value: Provides a concrete path for teams frustrated with YAML sprawl to adopt a more maintainable\, type\-safe\, and future\-proof approach—without abandoning the CNCF ecosystem’s GitOps best practices\.

Let's play badminton at Sports Centre Olšanka. We'll meet at 10.40 and play for 60 minutes. If you have a Multisport card please bring it along, as it will make the court free for you and also reduce the cost for others. If you don't have a Multisport card the game will cost you a maximum of 150 crowns, probably much less. I will cover the cost of the court so please bring cash to pay me. There is a small organisation fee of 20 crowns for all players to participate in this event. Racquets can be rented for 50 crowns.

Some people go to pubs. Some people conquer galaxies, build empires, trade spices, or outsmart dragons. Nerdy Fridays are our open board game nights for anyone who prefers strategy over small talk and dice over disco lights. Come solo or bring your crew. We’ll help you find a table, explain the rules, and match you with a game that fits your vibe. From light party games to deep strategic battles, the shelves are open. Entry fee: 100 CZK (includes access to games and rule explanation) Friday nights don’t have to be loud. They can be legendary. 🎲✨

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 You will need to scan your ID at the door to get a visitor badge. **Abstract** GitHub Copilot is powerful, but what if you could scale from a solo AI assistant to an entire team of specialized agents working in parallel? This session introduces Squad: an open-source framework for multi-agent orchestration that lets you define teams of AI agents with specific roles, responsibilities, and expertise. We'll progress from Copilot basics to the Copilot CLI, explore how Agents add autonomy, and see how Instructions and Skills let you customize agent behavior. Then, the climax: a live demo where a Squad team of 3 agents (Lead, Developer, Tester) stands up and builds a working application in real-time, showcasing true multi-agent collaboration. Whether you're new to AI or exploring how to scale your use of Copilot, this session will show you what's possible when agents work as a team. **YouTube Link** TBD

Dodgeball is back again! If you’ve been wanting to come out, this is an easy one to join. We’ll be playing for about 1.5 to 2 hours, you do not need to bring any equipment, and no experience is needed. We use a specific set of rules and equipment to make the games run better and keep them fun for everybody, not just people who already know how to play. If it rains, the event will be canceled.