Show HN: Beatsync – perfect audio sync across multiple devices Hi HN! I made Beatsync, an open-source browser-based audio player that syncs audio with millisecond-level accuracy across many devices. Try it live right now: https://ift.tt/qhlO1zA The idea is that with no additional hardware, you can turn any group of devices into a full surround sound system. MacBook speakers are particularly good. Inspired by Network Time Protocol (NTP), I do clock synchronization over websockets and use the Web Audio API to keep audio latency under a few ms. You can also drag devices around a virtual grid to simulate spatial audio — it changes the volume of each device depending on its distance to a virtual listening source! I've been working on this project for the past couple of weeks. Would love to hear your thoughts and ideas! https://ift.tt/dD5hlbC April 29, 2025 at 11:02PM
Show HN: Xilt – A concurrent log parser written in Go xilt is a utility for parsing Common and Combined Log Format (CLF) log files and storing them in SQLite for further analysis. I have built it as a learning project but it ended up proving useful in my work day-to-day. Maybe someone else occasionally working with CLF logs will also find it handy! https://ift.tt/XLsiEQk April 29, 2025 at 09:26PM
Show HN: ProKZee – An Open-Source Network Security Tool Written in Go Hi HN! After several months of work, I'm excited to share ProKZee, a free and open-source network security tool built with Go and React using Wails framework. ProKZee allows developers, security researchers, and penetration testers to intercept, inspect, and modify HTTP/S traffic — similar to tools like Burp Suite, OWASP ZAP, and Caido — but with a fast native UI, modern UX, and some unique features. https://ift.tt/B5jLu42 https://ift.tt/B5jLu42 April 29, 2025 at 01:11AM
Show HN: Zotero-MCP – Connect Your Research Library with Your AI Assistant Hi all! I forgot to share my project here, but since it just got over 1.2k calls on smithery, I figured that people here may be interested in giving it a try! Essentially it allows you to easily connect your zotero library to any LLMs through a MCP client, enabling the LLMs to read the papers that you collected, your notes, and the annotations - and it works both on your local and cloud library. Check this out! I would love to hear your feedback. :) https://ift.tt/7EFtbW4 April 29, 2025 at 12:06AM
Show HN: Daily Jailbreak – Prompt Engineer's Wordle I created a daily challenge for Prompt Engineers to build the shortest prompt to break a system prompt. You are provided the system prompt and a forbidden method the LLM was told not to invoke. Your task is to trick the model into calling the function. Shortest successful attempts will show up in the leaderboard. Give it a shot! You never know what could break an LLM. https://ift.tt/XDz3kde April 28, 2025 at 12:02AM
Show HN: I build a Fantasy NHL app in 3 days with Claude AI I am not from North America, and moved there a couple years ago. After being invited to the first fantasy league and seeing the platform they were using, I couldn't bring myself to check it every day. An excel sheet would have been more appealing to use than this. So I decided to create my own. But on the side? This would take ages. I am very confident with Rust and JavaScript, but it still takes ages to build something like that. Good prompts, and a few long nights later, and I could create something fun and easy to use. Have a look: https://ift.tt/DTW4ZCU The frontend is in React, the backend in Rust. I deployed both via fly.io. It was so simple and fast, it was shocking. After it was deployed, I took 2-3 days to refactor everything and made it neat and tidy, so I could possibly open it up for general use with accounts etc. The first time I built something with the help of AI not just for me. The biggest help was certainly the UI and styling. I was never good at that. The first draft looked rough. I fed it some screenshots from NHL.com and told the model to "make it look nicer". What you see is I think the 20th iteration of the app, slowly improving, fixing bugs etc. But 90% with the help of AI. I could have done 98% myself (except the styling part). And after each working iteration, I spend quite some time cleaning up so I can build on top of that. The beauty? The cleaner, more modular code base saved tokens and made it easier for the model to refactor and understand. Strictly typed (TypeScritp in the frontend, Rust in the backend) helped as well! April 26, 2025 at 10:34PM
Show HN: IdeaKiln – A platform to validate your startup ideas before building Hey HN, I'm Sebastian, and I just launched IdeaKiln.com — a platform to help makers, indie hackers, and founders validate their early-stage ideas, prototypes, or MVPs through community feedback. The idea came from personal frustration. I’ve started several projects where I spent weeks — sometimes months — building only to realize no one really wanted what I made. Without a large audience or email list, it’s hard to get early signals. IdeaKiln is my way of solving that problem. Instead of silently building in isolation, IdeaKiln gives you a place to: - Share what you’re working on (even in rough form) - Get early feedback and upvotes from fellow makers - Discover whether your idea resonates before committing too much time - Pivot or refine your direction based on real responses There’s no need for a landing page or pitch-perfect copy. Just post your raw idea and start the conversation. Right now, the platform is brand new and I’m looking to grow it into a helpful space for honest, early validation. If you’re working on something — or just have an idea in your head — I’d love for you to give it a try: https://ift.tt/1kG8PYZ Also happy to answer any questions, or chat about where it’s headed. Feedback is always welcome! April 25, 2025 at 12:58AM
Show HN: Infat – Declaritive application assocation manager for macOS Bello! Made this to help navigate the tumultuous process of navigating to a new machine on Mac when you have a number of custom utilities setup for editing particular files. This is designed to make that as easy as possible, and add some magic on top of that, like setting mailto handlers or anything else of that breed. Use XDG_CONFIG_HOME to keep it organized. Credit to https://ift.tt/f3enoMc for the original inspiration for the project. Happy to answer and help with whatever. https://ift.tt/zUlKvog April 24, 2025 at 11:07PM
Show HN: Document agent example that can parse and chat over unstructured data Hi all, Dapr maintainer here. We've added a new example that shows how you can build a conversational agent that can upload, parse and understand complex documents, while retaining long-term memory. The example also shows how the agent can upload the file to multiple storage providers. Would be great to get your feedback. https://ift.tt/qPbfgo6 April 24, 2025 at 12:16AM
Show HN: Body Controlled 3D Dino Game Hey HN, I am Niko. I've built this 3D Dino Game In browser using tech like three.js and MoveNet (tensorflow). Basically, it's a normal 3D dinosaur game with a twist: you need to actually perform actions irl to avoid obstacles. Duck to crouch, jump to jump, raise left hand - go left, raise right hand - go right. Game is using your phone/laptop camera to track your body movements and perform in-game actions. PS. Game is 100% client side and I don't record/track/use/save any of your data Hope you find it worth playing. (better play on PC) It's a 100% FREE browser game with no login! Please feel welcome to DM feedback or reply or anything! https://ift.tt/nfCmxuh April 23, 2025 at 02:58PM
Show HN: Itsi – all-in-one HTTP server and proxy with first-class Ruby support Hey HN, Meet "Itsi", a high‑performance, all‑in‑one HTTP server and proxy with first-class Ruby support. It's a drop‑in replacement for your current Rack server, built on Hyper and Tokio, ships with batteries‑included middleware, and lets you go from dev to production without any surprises. Itsi is my attempt at eliminating the disparity that commonly exists between production and non-prod environments. A single, efficient process containing everything you need to serve your app, equally at home on a Raspberry Pi or local dev box as it is on your production VPS or Kubernetes cluster. You get a broad set of built-in security and performance features (rate limits, JWT auth, CSP, intrusion-protection, automated certs, compression, ETag support, cache-control, etc.), an ergonomic dev experience with bundled RubyLSP support, zero-downtime config reloads, first-class Ruby gRPC handler support, Fiber-scheduler mode (à la Falcon), and more—all in one minimal library. In addition to native performance on par with top Rust and C servers, Itsi’s big wins come from replacing Ruby middleware and application-level concerns with native equivalents, freeing your Ruby CPU cycles for the logic that actually matters. Itsi is new but well-tested and already powering small production apps. I’d love to hear from eager early adopters who can help kick the tires and battle-test it. Thank you! https://itsi.fyi April 23, 2025 at 10:38PM
Show HN: I open-sourced my AI toy company that runs on ESP32 and OpenAI realtime Hi HN! Last year the project I launched here got a lot of good feedback on creating speech to speech AI on the ESP32. Recently I revamped the whole stack, iterated on that feedback and made our project fully open-source—all of the client, hardware, firmware code. This Github repo turns an ESP32-S3 into a realtime AI speech companion using the OpenAI Realtime API, Arduino WebSockets, Deno Edge Functions, and a full-stack web interface. You can talk to your own custom AI character, and it responds instantly. I couldn't find a resource that helped set up a reliable, secure websocket (WSS) AI speech to speech service. While there are several useful Text-To-Speech (TTS) and Speech-To-Text (STT) repos out there, I believe none gets Speech-To-Speech right. OpenAI launched an embedded-repo late last year which sets up WebRTC with ESP-IDF. However, it's not beginner friendly and doesn't have a server side component for business logic. This repo is an attempt at solving the above pains and creating a great speech to speech experience on Arduino with Secure Websockets using Edge Servers (with Deno/Supabase Edge Functions) for fast global connectivity and low latency. https://ift.tt/xWlsBeL April 22, 2025 at 07:40PM
Show HN: ArTok is TikTok for research papers Hello everyone! I always found it hard to find new research papers outside of my usual bubble. I thought a random feed (with no recommendation algorithms) might be a fun way to explore. But I also didn’t want to waste time on completely unrelated stuff — so the idea of a fast, swipeable format came to mind. Wikitok was a real inspiration! But Arxiv and Open Review APIs weren’t as robust as Wikipedia, so I pulled the papers into a Postgres backend. Right now, I’ve indexed papers from a few recent ML conferences to see if this might be useful for others too. No signups required and it’s totally free. You can mark your favorites and add text annotations, which are saved on your device. Would love to hear your feedback! https://artok.app April 22, 2025 at 12:43AM
Show HN: Open Codex – OpenAI Codex CLI with open-source LLMs Hey HN, I’ve built Open Codex, a fully local, open-source alternative to OpenAI’s Codex CLI. My initial plan was to fork their project and extend it. I even started doing that. But it turned out their code has several leaky abstractions, which made it hard to override core behavior cleanly. Shortly after, OpenAI introduced breaking changes. Maintaining my customizations on top became increasingly difficult. So I rewrote the whole thing from scratch using Python. My version is designed to support local LLMs. Right now, it only works with phi-4-mini (GGUF) via lmstudio-community/Phi-4-mini-instruct-GGUF, but I plan to support more models. Everything is structured to be extendable. At the moment I only support single-shot mode, but I intend to add interactive (chat mode), function calling, and more. You can install it using Homebrew: brew tap codingmoh/open-codex brew install open-codex It's also published on PyPI: pip install open-codex Source: https://ift.tt/4Di63ux https://ift.tt/4Di63ux April 21, 2025 at 11:27PM
Show HN: I built Run for Fun to stop me from doomscrolling until I exercise Some of you might know me as the developer of HACK, the iOS and Android apps for Hacker News. I spend a lot of time doomscrolling on Reddit, YouTube, and here at Hacker News. I also enjoy Powerlifting. So, I wondered whether I could use exercising as a way to reduce doomscrolling. So, I built Run for Fun. It helps you reduce screen addiction, end doomscrolling, practice self-discipline, and get healthy. You can privately and securely limit the usage of addictive social media apps and websites until you perform physical activity. When you walk, run, bike, climb stairs, and exercise, you gain screen time points to use those apps. You can control how easy or hard it is to gain those points. You can choose which weekdays and between what time period restrictions apply. You can snooze restrictions, choose how long to snooze for, or disable the snooze button altogether. I built it in Swift and according to Apple, is only 860 kB to download and 1.8 MB to install. I pride myself in keeping downloads small. It uses Apple's Screen Time and HealthKit APIs. The physical activity and app usage data stays private and is not transmitted to me, the developer. There are no ads and no subscriptions. Free version is limited to restricting 1 app, 1 website, 1 category and all-day everyday schedule. A one time only in app purchase gets you lifetime access to restricting unlimited apps, websites, and categories, restrictions scheduled on specific weekdays and time, and custom screen time points calculation and snooze times. Is this something you may find useful? https://ift.tt/h2f4607 April 21, 2025 at 10:48PM
Show HN: Real-time 4/20 cannabis sales dashboard using Estuary and Tinybird Built this dashboard to visualize cannabis sales in real time across North America during 4/20. The data updates live from thousands of dispensary POS transactions as the day unfolds. Under the hood, we’re using Estuary for data streaming and Tinybird to power super fast analytical queries. The charts are made in Tremor and the map is D3. https://420.headset.io April 21, 2025 at 12:33AM
Show HN: TikTrotter – TikTok but for obscure travel trivia to beat doomscrolling I'm trying to stop doomscrolling social media, so I made a website to help me. I'm a huge traveler so I made a website that shows infinitely-scrolling obscure locations with interesting trivia in a TikTok-like manner. I've been discovering a lot of cool places in the world and dropped my social media time a lot. The website is 100% free, no ads and no sign-up. Check it out if interested, I would appreciate some feedback. Next step is to create a multiplayer trivia game where you can challenge your friends and see who knows more about the world. https://ift.tt/kMK0lnb April 20, 2025 at 09:34PM
Show HN: Tascli, a simple, local CLI task and record manager A simple task and record manager in CLI, with entries stored in a local sqlite file. Treats task (things with a due date) and records (things with only event date) separately and able to manage both. https://ift.tt/i0uoyVC April 21, 2025 at 12:31AM
Show HN: Ibex – a cross-platform iOS backup decryption tool ibex is a cross-platform tool designed for decrypting and extracting iOS backups. It provides forensic investigators, security researchers, and power users with the ability to access and analyze encrypted iOS backup data. It can be built and used on macOS, Linux, and Windows and is permitted to be used only with the explicit and informed consent of the backup data owner. Ibex was written in Go for straightforward compilation and to circumvent dependency issues and with the goal of enabling researchers and defenders assisting civil society victims of spyware and stalkerware Key Features - Decrypt encrypted iOS backups - Support for latest iOS versions - Cross-platform compatibility (macOS, Windows, Linux) - Automatic backup detection - Single file extraction based on filename match - Structured output organization - Detailed manifest parsing and extraction Basic Usage Examples # Run with automatic backup detection and interactive mode ibex # Specify just the backup path ibex -b /path/to/backup # Specify backup path and password ibex -b /path/to/backup -p "backup_password" # Specify custom output directory ibex -b /path/to/backup -p "backup_password" -o /path/to/output # Specify a single file for decryption and extraction ibex -b /path/to/backup -o /path/to/output --file sms.db # Specify relative path preserved output ibex -b /path/to/backup -o /path/to/output -r https://ift.tt/zBpRSQc April 19, 2025 at 11:10PM
Show HN: Dirb – Directory in Bio Dirb lets you build a personal profile, organize links into rich, shareable lists, and automatically pull metadata and embeds. With built-in analytics, you can track clicks, views, and visits. It's made for creators, entrepreneurs, and professionals. Let me know what you think. I appreciate any feedback! https://dirb.io April 19, 2025 at 12:42AM
Show HN: (bits) of a Libc, Optimized for Wasm I make a no-CGO Go SQLite driver, by compiling the amalgamation to Wasm, then loading the result with wazero (a CGO-free Wasm runtime). To compile SQLite, I use wasi-sdk, which uses wasi-libc, which is based on musl. It's been said that musl is slow(er than glibc), which is true, to a point. musl uses SWAR on a size_t to implement various functions in string.h. This is fine, except size_t is just 32-bit on Wasm. I found that implementing a few of those functions with Wasm SIMD128 can make them go around 4x faster. Other functions don't even use SWAR; redoing those can make them 16x faster. Smooth sort also has trouble pulling its own weight; a Shell sort seems both simpler and faster, while similarly avoiding recursion, allocations and the addressable stack. I found that using SIMD intrinsics (rather than SWAR) makes it easier to avoid UB, but the code would definitely benefit from more eyeballs. See this for some benchmarks on both x86-64 and Aarch64: https://ift.tt/19Y7OJC... https://ift.tt/emynIYP April 18, 2025 at 11:36PM
Show HN: I built a simple, fast transit app for the Bay Area Hey HN, I built Commuter because I was tired of switching between different apps to check arrival times for BART, Caltrain, Muni, ferries, and more. This app pulls directly from the official 511 API and aims to provide a fast, clean experience focused on real-time departures. There’s no account creation, it’s free to use, and it supports every major transit provider in the Bay Area—from Napa down to San Jose. You can search, favorite lines/stops, and see live countdowns with minimal friction. It’s built entirely in SwiftUI using native Apple frameworks. Happy to answer questions about the API, SwiftUI quirks, or anything else. Feedback welcome! https://ift.tt/c7PbW6L April 18, 2025 at 11:00PM
Show HN: val – An arbitrary precision calculator language written in Rust Wrote this to learn more about the `chumsky` parser combinator library, rustyline, and the `ariadne` error reporting crate. Such a nice DX combo for writing new languages. Still a work in progress, but I thought I'd share :) https://ift.tt/zjunLZ7 April 18, 2025 at 01:21AM
Show HN: HN Watercooler – listen to HN threads as an audio conversation Hi HN, here's something fun to play with. It takes any HN thread and turns it into an audio conversation so you can listen to the thread while doing other things. I've seen many previous attempts to turn HN threads into podcasts, but they all shared a common issue IMO: trying to reduce the very rich back-and-forth into a single-thread single-reader boring podcast. Instead, I wanted to hear the actual debate from the actual thread! So I asked Claude 3.7 to build this for me as a browser-only app. It just needs a thread URL and an Elevenlabs API key (this all remains in your browser, you can check the source code, it's only 3 files, there is no server storage of anything). To make the resulting audio experience as natural as possible, each commenter has a different voice. Commenters who appear multiple times in the thread have the same voice, and introduce themselves. A bit of context is also introduced when coming back "up" from deeply nested comments. You can play the resulting audio or download it for later listening. I'm planning to later add the ability to load multiple threads so I can have a playlist generated for listening in the gym! Any comments or improvement suggestions are appreciated! https://ift.tt/cfZljsa April 18, 2025 at 12:24AM
Show HN: Zuni (YC S24) – AI Copilot for the Browser Hi HN, I'm Will, and along with my co-founder George, we've built Zuni ( https://zuni.app ) - a browser extension that adds contextual AI capabilities to your browser. It understands what you're reading and working on, whether that's email, research, or anything else in your tabs. We started out building a full email client with AI built in (you might have seen that version showcased in YC’s AI Design Review - https://www.youtube.com/watch?v=DBhSfROq3wU&t=1601s ), but learned that people don't actually want to leave their existing tools - they just want them to work better. Gmail might be frustrating, but it has years of features people rely on. So we pivoted to enhance the tools people already use, rather than replace them entirely. Some specific things Zuni does today: - Analyzes emails as you read them in Gmail, identifying action items and suggesting possible responses - Lets you discuss how to handle tricky emails, almost like having a thought partner - Maintains context across your browsing session so you can ask follow-up questions naturally - Runs locally first for speed and privacy - Doesn't store chats, emails or anything sensitive in the cloud We're still early and focusing on getting the core experience right before adding more integrations. The goal is to make AI actually useful in your daily work, rather than just another "AI feature" checkbox. Would genuinely love feedback from the HN community - what would make this truly useful for your workflow? What are we missing? Happy to answer any questions about the technical implementation too. https://zuni.app April 17, 2025 at 08:45PM
Show HN: We made a VS Code extension to recreate a debugger experience from logs A month ago [1], we made an MCP server so Cursor can debug Node.js on its own. We emailed every person that starred our repository [2] and learnt that frontend devs really want to give Cursor access to browser logs, and that backend devs (our intended audience) do not use debuggers nearly as much as we thought. We interviewed friends across startups and discovered that they use logs to debug, because they can’t run services locally on their machine. The services (1) require too much disk, RAM, or CPUs to run locally, (2) have too many service dependencies (think microservices), or (3) are a faff to instantiate locally with a debugger. Instead, our friends instrument their services, deploy them to staging environments via Kubernetes, and then query the logs via data stores (think Grafana, Axiom.co, Google Cloud Logging, etc) or directly (think Kubernetes logs). We thought: "What if we could recreate a debugger-like experience from logs?". That would save them from browsing logs and trying to make sense of them outside the context of the code base. We looked into it and made a VS code extension that lets you (1) import logs, (2) go to the line of code associated with a log, and navigate up/down the probable call stack associated with a log. It's a prototype, but if you're interested in trying it out, we'd love some feedback! GitHub: github.com/hyperdrive-eng/traceback --- References: [1]: https://ift.tt/DiQzNX6 [2]: 140 Github stars, 69 emails sent (the rest were bots), 19 responses received (= 28% response conversion), 4 meetings held (= 21% meeting conversion). https://ift.tt/qi6vZYO April 17, 2025 at 04:37AM
Show HN: Milter in Rust to Add Headers Here's a milter in Rust that adds List-Unsubscribe headers. It creates a URL that has encoded email-from, rcpt-to and a HMAC SHA 256 verification hash using a shared secret key. Possibly it improves delivery of newsletters and transactional emails. https://ift.tt/gpyfUaV April 17, 2025 at 02:22AM
Show HN: Particle - News, Organized Hello HN! Particle News product engineer here. Keeping up with the news is overwhelming in an age of information overload. Particle reimagines the experience by organizing articles into comprehensive "Stories," offering clear, concise summaries to quickly grasp what matters. Today, we reached the #1 spot in "Newspapers & Magazine" on the iOS App Store—and I thought I'd share a bit of our backstory. I've been connected to this team for a long time. About 20 years ago, I shared a house with our CTO and co-founder Marcel Molina. I helped him get started with programming. Since then, Marcel has had an extraordinary career—becoming a senior staff engineer at Twitter, where he helped build foundational features like Retweets, Notifications, and Lists, and later working at Tesla on manufacturing execution systems that scaled across Gigafactories. At Twitter, Marcel worked closely with our CEO and product visionary Sara Beykpour, who led initiatives like Twitter Blue, Twitter Video, and the experimental app twttr . Sara has a background in Software Engineering and Cognitive Science from the University of Waterloo and spent over a decade at Twitter in engineering and leadership roles. In late 2022, Sara and Marcel started prototyping a news app that could reduce the cognitive and emotional burden of staying informed—by using AI to help people understand more, faster. They were soon joined by a few other former Twitter colleagues who helped shape the early concept into a working iOS application. I joined about 15 months ago to contribute across the entire stack. Since then, I've helped design and build major iOS features, rewritten our public website on Cloudflare Workers, and implemented new functionality in our Go backend, which is driven by Google Cloud's Pub/Sub architecture. What Makes Particle News Different Particle helps you navigate the news effortlessly—leveraging AI to help you understand more, faster. Some highlights: • Personalized News – Your feed is tailored to your interests. You can follow specific people, places, and things so you never miss what matters to you. • Clear Summaries – Get a quick overview or dive deeper with detailed, structured context—summarized in natural language. • Perspective Tools – Features like "Opposite Sides" and our political spectrum chart let you explore stories through multiple lenses. • Interactive Q&A – Ask questions about any story and get concise answers with sources and citations. • Audio Summaries – Use the "Play" feature to listen to your feed, specific stories, or even select articles—great for hands-free or on-the-go moments. One of the things we're most proud of is how Particle supports publishers. We've partnered with outlets like Reuters, AFP, and Fortune to host some of their content via APIs. These partners get prominent placement, and their links are highlighted in gold to stand out. This model aims to drive traffic back to publishers and reward high-quality journalism, rather than just aggregating and commodifying it. Transparency is a core value: all sources are cited, generated answers are grounded in evidence, and we take real care to prevent AI hallucinations or misleading summaries. Despite negligible marketing spend, Particle has grown to the top of its category by focusing on engagement with early users and meaningful partnerships with the media ecosystem. Coming soon: weekday mini crosswords—a new feature designed by another longtime friend of ours from 20 years back who went on to work at Twitter, lead development on Firewatch, and release his own games independently. It's incredibly fun and rewarding to be building something meaningful with old and new friends. I feel lucky every day to work alongside some of the best product, design, and engineering minds on a project we hope will help people stay engaged with democracy without burning out. https://ift.tt/PaurkVG April 16, 2025 at 02:56AM
Show HN: Torque – A lightweight meta-assembler for any processor Hello everyone, I've been working on this project for the past few months. Torque is a meta-assembler: instead of having an instruction set built into the assembler, you use macros to build up a small language that decribes an instruction set and then you use that to write your program. It's designed to work for any microcontroller/processor architecture, you build from the bit level upwards so there aren't any assumptions around word widths, instruction formats, or endianness. I created Torque initially to write programs for a PIC microcontroller, after running into difficulties with the official assembler. I've also used it to write programs for the Z80 processor inside an old TRS-80 computer. Let me know if you try it out or have any questions! https://ift.tt/80nluMc April 16, 2025 at 03:16AM
Show HN: ActorCore – Stateful serverless framework that runs anywhere TL;DR: ActorCore is a stateful serverless framework that can be deployed to Rivet, Cloudflare, Bun, Node.js and more. It's the easiest way to build stateful, AI agent, collaborative, or local-first applications. Hey HN! A few months ago we launched Rivet Actors ( https://ift.tt/wWzAEGs ) as an open-source alternative to Cloudflare Durable Objects. Shortly after launching, we realized our goal is not to win over existing Durable Objects developers, but rather to grow the stateful serverless ecosystem. For context – "stateful serverless" is effectively the actor model with persistent state attached. Think Lambda functions with local storage & runs indefinitely. It's a a technology that’s gaining traction to ship faster, achieve higher performance, and outscale Postgres. The most widely used implementation is Cloudflare Durable Objects. In the process of talking to developers, we kept hearing three common concerns: - Vendor lock-in: Developers are hesitant to adopt a new programming model if there's no clear off-ramp. While it's straightforward to migrate a Postgres database, stateful serverless platforms like Rivet Actors or Durable Objects can feel locked-in due to lack of viable alternatives. - Ecosystem: Choosing a well-known database like Postgres comes with a mature ecosystem. Adopting a new model means rebuilding tooling and patterns from scratch. - Conceptual gap: Many developers have spent their entire careers designing systems with intentionally separated state and compute. A model that merges the two can feel backwards at first. After hearing these concerns again and again, we came to the conclusion that the best solution was to build a framework that works with as many platforms as possible to reduce lock-in (concern #1) and grow a shared ecosystem of tools (concern #2). It turns out, we already had a battle-tested framework built on top of Rivet Actors that we’ve been using for years. (It has a long, funky history beyond Rivet in gaming I won't get into here.) Thus, we split out the framework in to a new repo, added support for four platforms (easier said than done), and called it ActorCore. It gives developers multiple platforms to choose from when adopting stateful serverless and creates a foundation for a broader, cross-platform ecosystem. However, this still leaves concern #3: the conceptual gap. While this isn't something we can solve with a framework, I personally spend ~40% of my time working on docs, content, and examples to help resolve this. ActorCore is also panning out to be community-driven as hoped, which enables more people to try and share their experience with stateful serverless. Give ActorCore a try, read the roadmap, and let us know where we can improve documentation. If you're hesitant about trying stateful serverless, I'd love to learn more in the comments. Consider giving us a star on GitHub: https://ift.tt/mqTgs6e https://ift.tt/n1oubKL April 14, 2025 at 08:27PM
Show HN: Crystal, the most accurate U.S. gov't data search tool Hi everyone! We're relaunching Crystal, which lets you search and analyze 300k+ government datasets using plain English. For example, prompting "Air quality since 2020 in NYC" will find the most relevant datasets for you. We find it's way better than any search tool out there today, like data.gov. We're hoping anyone who uses public data as a resource, like researchers, consultants, journalists, etc. will find it helpful. Crystal is straightforward - it's in alpha, so there's only a few queries per person, and the app itself is in its infancy. We're invested in making this better for people, and we'd love feedback + beta signups - you can provide either via https://ift.tt/7rxpHei or down below! If you'd like to partner with us more closely or have other thoughts, please email us at cedric@crystal.info or ari@crystal.info https://ift.tt/s6IupCe April 13, 2025 at 11:53PM
Show HN: TripJam – Travel group chat with collaborative map and itinerary We built TripJam after being frustrated with planning trips in regular group chats and trying to organize information across multiple apps. It combines: - Group chat that keeps all travel discussions in one thread - Interactive maps where everyone can pin locations and add notes - Collaborative itineraries that sync with your calendar - AI travel assistant that suggests activities and helps optimize your plans This solves trying to coordinate information with everyone using messages, Google Maps, Google Docs, and travel guides. Everything syncs in real-time so everyone stays on the same page. We would love your feedback! https://tripjam.com https://tripjam.app April 13, 2025 at 01:55AM
Show HN: OctAPI – Visualize API Routes Directly in VS Code Started noticing issues while working with friends that I thought only I was encountering: spending too long manually adding routes to postman, getting lost looking for a single route in the sea of files and thought Hey, I can fix that (I think?) So OctAPI is a VSCode extension that automatically detects and displays API routes from a local project (currently supports Express.js, NestJS, Next.js, Koa, Flask, and FastAPI), it filters and groups them, generates a Postman export JSON file, and adds to favs. It doesn't run your code and it all stays in your machine A friend literally screamed when they were live testing it for me lol It's open source ( https://ift.tt/C9yevnD ) and here's its landing page ( https://ift.tt/mduJ18x ) I'm hoping to add custom tags, more frameworks support and even AI features. https://ift.tt/lx4k5ed April 13, 2025 at 01:48AM
Show HN: Atari Missile Command Game Built Using AI Gemini 2.5 Pro A modern HTML5 canvas remake of the classic Atari game from 1980. Defend your cities and missile bases from incoming enemy attacks using your missile launchers. Initially built using the Google Gemini 2.5 Pro AI LLM model. https://ift.tt/Uo6195F April 7, 2025 at 11:48AM
Show HN: A gallery of ChatGPT image styles for inspiration I found myself collecting a ton of different styles to explore and get inspiration for other photos so I built this to share the collection with others. The site was also completely coded using ChatGPT. https://imagestyles.ai April 11, 2025 at 11:10PM
Show HN: Repo Roast – a real-time feed of the funniest comments on GitHub Hey HN - I'm Mason, and I'm excited to share a fun side project I've been working on recently: Repo Roast. For me, Github often feels like a serious (and sometimes soulless) place. I built this website to showcase the human, silly side of developers. Repo Roast is built on top of LLM-powered GitHub analytics tooling we’re developing internally at Merit Systems [0]. One of the historically cited weak points for LLMs has been their sense of humor. I found that with the right prompt, at scale, they mostly can _identify_ humor pretty well. We experimented with a couple of different models to tune the cost/effectiveness and eventually landed on a strategy where we have gpt-4o-mini do a very light filter pass to reduce the number of calls to GPT-4o to do the actual humor scoring. Interestingly, our first prompt attempts ended up surfacing wayyy more aggressively NSFW content, which is funny that this happens despite all the censoring that OpenAI is doing. So far we have processed the last 90 days of historical comments and continuously process new ones every hour. We theoretically can run this against a wider historical window given there is sufficient interest to justify the costs! Repo Roast is in no way intended to make you a better or more productive dev. You can use it as a leaderboard or hiring tool (if you’re looking for personality), or just a way to distract yourself! If you've had any funny Github interactions, I'd love if you shared them below. Cheers! --Mason [0] https://ift.tt/4FUQo0V https://ift.tt/EjtTJiz April 10, 2025 at 12:40AM
Show HN: Aqua Voice 2 – Fast Voice Input for Mac and Windows Hey HN - It’s Finn and Jack from Aqua Voice ( https://withaqua.com ). Aqua is fast AI dictation for your desktop and our attempt to make voice a first-class input method. Video: https://ift.tt/1KoXbaP Try it here: https://ift.tt/wySV8g6 Finn is uber dyslexic and has been using dictation software since sixth grade. For over a decade, he’s been chasing a dream that never quite worked — using your voice instead of a keyboard. Our last post ( https://ift.tt/KhfQzjm ) about this seemed to resonate with the community - though it turned out that version of Aqua was a better demo than product. But it gave us (and others) a lot of good ideas about what should come next. Since then, we’ve remade Aqua from scratch for speed and usability. It now lives on your desktop, and it lets you talk into any text field -- Cursor, Gmail, Slack, even your terminal. It starts up in under 50ms, inserts text in about a second (sometimes as fast as 450ms), and has state-of-the-art accuracy. It does a lot more, but that’s the core. We’d love your feedback — and if you’ve got ideas for what voice should do next, let’s hear them! https://withaqua.com April 9, 2025 at 10:01PM
Show HN: I built a tool that deconstructs websites to reveal their tech stack Hi HN, I built https://unbuilt.app to solve a problem I frequently faced as a developer: identifying the technology stack behind websites, especially those using newer frameworks and tools. While existing solutions rely on pre-saved data or signature databases, Unbuilt performs a fresh analysis by actually loading and examining the website code in real-time. This means it can detect cutting-edge technologies that often get missed by other analyzers. Technical details: - Uses Playwright to visit sites and analyze their resources - Queue-based architecture for handling concurrent requests - Optimized patterns for detecting modern frameworks (Next.js, Vite, React Compiler, etc.) - Dual-layer caching system for both performance and result sharing The tool is completely open-source and free to use. There are no premium tiers or usage limits. I built it because I believe developers deserve better tools for understanding the web ecosystem. I'd appreciate any feedback, particularly on detection accuracy and the types of technologies you'd like to see added. If you're interested in contributing, all pattern detection logic is designed to be easily extensible. Link to repo: https://ift.tt/VBD4fuc https://unbuilt.app/ April 9, 2025 at 10:57PM
Show HN: My mom was unimpressed with my blog. What do you think? I recently launched my personal tech blog and proudly showed it to my mom. Her response? "It's... fine." Now I need your brutally honest feedback! Blog URL: https://simonaking.com Github: https://ift.tt/urvcanD PS: Every visitor gets my mom one step closer to understanding what I actually do for a living! https://simonaking.com/ April 9, 2025 at 11:30AM
Show HN: DrawDB – open-source online database diagram editor (a retro) One year ago I open-sourced my very first 'real' project and shared it here. I was a college student in my senior year and desperately looking for a job. At the time of sharing it i couldn't even afford a domain and naively let someone buy the one i had my eyes on lol. It's been a hell of a year with this blowing up, me moving to another country, and switching 2 jobs. In a year we somehow managed to hit 26k stars, grow a 1000+ person discord community, and support 37 languages. I couldn't be more grateful for the community that helped this grow, but now i don't know what direction to take this project in. All of this was an accident. But now I feel like I'm missing out on not using this success. I have been thinking of monetization options, but not sure if I wanna go down that route. I like the idea of it being free and available for everyone but also can't help but think of everything that could be done if committed full-time or even had a small team. I keep telling myself(and others) i'll do something if i meet a co-founder, but doubt and fear of blowing this up keeps back. How would you proceed? https://www.drawdb.app/ April 9, 2025 at 05:50AM
Show HN: A website/app to help manage your game library So, me (dev) and my friend (designer) have been building a website/mobile app to help users manage their game library (think MyAnimeList, but games) for a little over a year. We launched with a very basic set of features, and have been slowing expanding since then. All the code is open source, and most of the things we implemented were direct feedback from users (e.g. being able to import games from Steam/PSN, and the Posts feature). We don't show ads or have any kind of subscription. This is just a hobby project. Any feedback would be greatly appreciated, as honestly the hardest part is getting people to actually try it out. Link: https://gamenode.app You can also reach out to me via cassiolamarcksilvafreitas@gmail.com https://gamenode.app April 8, 2025 at 11:05PM
Show HN: Kahuna, the IndexedDB-Manager Webextension This has been my pet project and playground for a long time and has gone throught several framework changes, overhauls, etc.. Sometime last winter I realized that there has been a lot of progress since I started using plain javascript and lit-html and that it is time for a release. And then the hard work began... But anyone who has used the browser's own developer tools for working with IndexedDB databases will probably agree that there must be more convenient methods. And even though Kahuna can't do everything I want it to yet, it's certainly a good start. Since yesterday, the webextension is available in the Chrome Web Store [1] and as a Firefox Add-On [2]. Feedback, comments, bug reports, and feature requests are all more than welcome! [1] https://ift.tt/AejuU9I... [2] https://ift.tt/lI4eBuo... https://ift.tt/1kt6VPx April 7, 2025 at 11:01PM
Show HN: SQLTest.online: A free, interactive SQL practice platform I built Just launched: SQLTest.online - a free, hands-on platform for learning and practicing SQL. Features exercises covering basic syntax through advanced topics. This is a personal project I've been working on. https://sqltest.online April 7, 2025 at 10:05PM
Show HN: I created a ELI5 Blockchain glossary, with also a bit of interactivity The reason is simply that I'm learning blockchain and i found myself searching and hardly recalling terminology. So I started building a glossary (that slowly i'm making interactive) in which the terms are explained with ELI5 analogies. AI helped me with that. Hope you find it useful. You can contribute to the data set here: https://ift.tt/lQkqehA https://ift.tt/nBv7WZo April 6, 2025 at 10:40PM
Show HN: A fast, minimal and offline-friendly web playground I built a web-based HTML/CSS/JS editor focused on speed, simplicity, and offline access. No bloat — just open and start coding. What makes it different: Live Preview – Edit HTML, CSS, and JS side-by-side with instant feedback. Offline support – Works without internet. You can even install it as a PWA and use it like a native app. No Login Required – Just visit, code, and preview. Login only if you want to save/share. Savable & Shareable Links – Save scripts in the cloud and get shareable links. Customizable Editor – Themes, fonts, auto-format on save, layout tweaks, line wrapping, etc. Hotkey Support – Power user shortcuts with tooltips showing keybinds. Download as ZIP – Export your project with HTML/CSS/JS files separated. Ideal for tinkering, prototyping, teaching, or even building micro-tools. It’s intentionally simple and fast — more features coming soon. Try a sample snippet: https://ift.tt/uaOIsho https://ift.tt/uJvhw81 April 7, 2025 at 01:55AM
Show HN: Latitude.sh Databases – Simple PostgreSQL DBaaS on Bare Metal Hi HN, Gabriel here, one of the developers at Latitude.sh (we're a bare metal cloud provider). Over the past year or so, I've been the primary developer building Latitude.sh Databases – our take on a managed PostgreSQL service. The core idea was to offer a straightforward and competitively priced option for developers who need reliable PostgreSQL without overly complex configurations, leveraging the performance benefits of running directly on bare metal. It runs on our global bare metal infrastructure. Key features we've implemented include: * Built-in monitoring & connection pooling * IP Address Whitelisting (Trusted Sources) * Automated backups configured directly to your own S3 bucket (giving you control over storage and potentially costs) * An optional integration with Supabase, allowing you to use parts of their dashboard for enhanced usability with your database. Under the hood, it's built on Kubernetes running on our bare metal servers, using the CloudNativePG operator to manage the PostgreSQL instances. We've found this operator approach works well for handling stateful database workloads in K8s, challenging the old notion that databases don't belong there. The service stemmed from internal needs and early interest gathered from a waitlist (~300 signups). It's currently live and available for use. We're launching it here on HN because we'd genuinely appreciate your feedback on: * The overall developer experience and UI simplicity. * The current feature set (especially the S3 backup and Supabase integration). * Performance perceptions (given the bare metal base). * Our pricing model's competitiveness and clarity. * Any technical aspects of the implementation (running PG on K8s/bare metal). Happy to answer any questions you have! You can check out the product page here: https://ift.tt/Qwo9hV4 Thanks for looking! https://ift.tt/Qwo9hV4 April 6, 2025 at 11:30PM
Show HN: Windows XP Themed Personal Site Built with React I geek out on any UI from the 2000s, so I built my personal site to look and feel like Windows XP. Made this two years ago to get better at React. My goal was to fool my dad into thinking he was actually using Windows XP and it seemed to work. No mobile version (yet) :( If you think it's cool you can check out the somewhat outdated code: https://ift.tt/0C5hMa2 https://ift.tt/uXiQWf7 April 6, 2025 at 02:20AM
Show HN: I made an AI Platform that gamifies applying to jobs Hi there! I've created ApplyNinja, a platform that uses AI to help jobseekers apply to jobs faster and better. What differentiates ApplyNinja from the other "auto-apply" platforms is the trained AI model behind it. It learns from your resume and the jobs you apply to, and it provides better and better results. Currently, it serves as a helper for the entire application process: - Track & Monitor job applications - Generates Resume suggestions and highlights the parts that are not so good - Auto-fixes and generates a new resume based on the suggestions - Creates Cover Letters based on your resume and the job description - Generates Company Insights, scraping user reviews from Glassdoor, Indeed etc. - Generates Salary Insights so jobseekers have a negotiation leverage - Generates Technical Interview Questions based on the Job Description On top of all of this, it provides a gamified experience, because consistency is the key in applying to jobs. Me and my friends are using it daily and manage to land approximately 5-10 interviews/month as Software Engineers. I would really love any kind of feedback. Thank you very much! https://ift.tt/fPk9jaq April 6, 2025 at 12:09AM
Show HN: Experience iPhone's "Blob Keyboard" prototype from 2005 Hi HN, I teach tech design history, and one of the key stories I cover is the development of the original iPhone keyboard by Ken Kocienda. Reading about it in his book "Creative Selection" is great, but I wanted my students (and now you!) to actually feel this step in the process. So, I built a web simulator of the "Blob Keyboard", Kocienda's very first attempt at a touchscreen keyboard that actually works, from September 2005: Try the Blob Keyboard: https://ift.tt/dtkDo2O... - Tap for the middle letter - Swipe left or right for the side letters More on the github repo: https://ift.tt/nRJZxFE The Blob Keyboard prototype emerged during a UX crisis for iPhone team (their software keyboard just didn't work at all, fingers being too big, and the Newton failure loomed over them), highlighting how innovation is rarely a straight path. It was developed on a tethered touchscreen display codenamed "Wallaby". To make this simulator as authentic as possible, I referenced images from Kocienda's book and even got direct feedback and guidance from Ken Kocienda himself on Bluesky. What to expect (or… what not to expect): This is a reconstruction of a very early prototype with limitations reflecting that specific moment. The goal was to test first if typing with accuracy was even possible, as all the rest was moot if it failed! It's NOT QWERTY: They were still hoping to get us out of QWERTY, but then familiarity won. No Backspace: You can't delete. No Cursor Movement: The text field is just a simple display. No Caps or Numbers: Only lowercase letters. No Smooth Animations: Keys just "pop" instantly when pressed. Kocienda noted that your eye fills in the gaps, giving a sense of movement. Best Experience: While it works with a mouse/trackpad on desktop, it's designed for touchscreens to better replicate the original Wallaby hardware interaction. Use it on your phone! This project aims to provide a tangible glimpse into a turning point moment in iPhone development and the iterative nature of design. It's like stepping back in time and trying out that early demo on Kocienda's desk. I would love to hear your reactions and thoughts on experiencing this piece of UI history! What other significant prototype do you wish you could experience? April 5, 2025 at 11:50PM
Show HN: Reharmonizing Racing in the Street by Bruce Springsteen I put together a short essay on re-harmonizing Racing in the Street by Bruce Springsteen. Just a simple demonstration of what’s possible today with a few hours and the right mix of technology https://ift.tt/pVayf72 April 5, 2025 at 11:11PM
Show HN: Clawtype v2.1 – a one-hand chorded USB keyboard and mouse [video] Written in Rust (embassy), running on a SparkFun ProMicro RP2040 board, with an MPU6050 gyroscope. Based on the Chordite idea from John W. McKown ( https://ift.tt/QDwzpqO... ). Intended for use with XR glasses I recently bought. Currently my typing speed is still rather slow, but my skill is graduably improving and at a noticeable pace, and I can and do some vim coding in my hobby time. I plan to try and do a wireless (BLE) version next, hopefully running off a single AA NiMH battery. The code is at: https://ift.tt/DVjympK https://www.youtube.com/watch?v=N2PSiOl-auM April 5, 2025 at 04:02AM
Show HN: SwiftHive – A Swift Package Registry for Faster Builds Hi HN! I've built SwiftHive, a private Swift package registry that solves several pain points with Swift's dependency management. We drastically reduce build times, ensure reproducibility, and I'm actively looking for beta testers from the community. https://ift.tt/AXnePZm April 5, 2025 at 03:00AM
Show HN: DuckDB Powered SQL Editor Hi guys, I made an SQL editor that utilizes the duckDB engine to process your queries. As a result, the speed gains are +25% when compared to using any standard editor that connects through JDBC. I built this because I work on a small data team and we can't justify an OLAP database. Postgres is amazing but, if I try to run any extremely complex queries I get stuck waiting for several minutes to see the result. This makes it hard to iterate and get through any sort of analysis. That's when I got the idea to use duckDB's processing engine rather than the small compute available on my Postgres instance. I didn't enjoy writing SQL in a Python notebook and wanted something like dBeaver that just worked, so I created soarSQL. Try it out and let me know if it has a place in your toolkit! https://soarsql.com April 5, 2025 at 01:40AM
Show HN: I made an online free tool site Hi HN! I've created [UFreeTools]( https://ift.tt/BAhfiL8 ), a collection of developer utilities (60+ tools and growing) that's completely free, ad-free, and runs entirely in the browser. No data leaves your device - everything is processed locally. ## Background As a developer, I found myself constantly searching for simple utilities like JSON formatters, UUID generators, and color pickers. Most existing options were cluttered with ads, required sign-ups, or sent data to servers. I wanted clean, fast tools that respected privacy. So I built UFreeTools as a modern SPA using Vue 3 and Vite with: - 100% client-side processing for all tools - Progressive loading with dynamic imports (only load what you use) - Dark/light theme support - Offline capability for most tools - Responsive design that works well on mobile ## Technical Details Some of the more technically interesting implementations: - *JWT Debugger*: Uses WebCrypto API for verification of all common algorithms - *Symmetric Encryption*: Implements AES-GCM/CBC/CTR with PBKDF2 key derivation - *Image Processing*: Uses Web Workers for non-blocking operations on large images ## Lessons Learned The biggest challenges were: 1. *Performance optimization*: Some tools (like image processors) needed careful optimization to handle large files without freezing the UI 2. *Browser API limitations*: Working around browser restrictions for certain crypto operations 3. *Bundle size management*: Keeping the initial load small while supporting 60+ tools ## Future Plans I'm planning to add: - Tool configurations sync via local storage - More specialized tools for developers based on feedback I built it because I needed these tools myself, and I hope others find it useful. I'd love your feedback, especially on UX, tool suggestions, or if you find any bugs! [Try UFreeTools]( https://ift.tt/BAhfiL8 ) https://ift.tt/BAhfiL8 April 4, 2025 at 11:26PM
Show HN: Monkeys.zip – 3000 Monkeys on Typewriters Hey HN! I posted this on April 1st when it launched, and though it didn't get traction here, it was a minor hit on reddit! Now that we've got a few thousand monkeys under our belt, wanted to give it another shot here! Happy to talk about the technical details of running the site - using supabase/postgres and constantly putting out fires from the traffic. https://monkeys.zip/ April 3, 2025 at 11:36PM
Show HN: Haystack Code Reviewer – Guided Tours for Pull Requests Hi HN! We’re excited to share Haystack Code Reviewer, a tool that analyzes, chunks, and organizes the changes made in a pull request and guides you through them in a logical sequence on an interactive canvas. We hope that Haystack really cuts down on the time that you spend piecing together what's happening in the pull request, so that you can spend time on the parts that matter, like providing feedback or internalizing the changes. As software engineers who’ve dreaded code reviews and always put them off as much as possible, we noticed how much time we spent poring over diffs to understand the broader picture or narrative of a pull request before even evaluating the code itself. Haystack Code Reviewer is designed to assemble that jigsaw puzzle for you, making code reviews less of a chore and more of a learning opportunity for both the reviewer and author! To play with demo code reviews, go to https://ift.tt/XHW0CxU and select a pull request of your choice. If you’re interested in learning more, feel free to check out our short demo video at https://youtu.be/K_qLwXFwr8I . Or if you’re ready to try it out, head over to https://ift.tt/3Cyg0qk and: 1. Optionally sign in (necessary if you want to review a pull request for a private repository). For public repositories, no sign-in is needed 2. Load any PR via URL or from the dropdown (for example, try https://ift.tt/xFjCXvh ) 3. When prompted for AI analysis, click “Yes” to enable automatic organization and sectioning (we send only the diffs in the pull request to OpenAI). We hope you find Haystack Code Reviewer useful. Let us know what you think! You might have seen our previous Show HN at https://ift.tt/tOUuEMP . We have now completely redesigned it to work with a guided AI tour of exactly how you should review the pull request so that you don't have to even think about how to approach a code review! https://ift.tt/XHW0CxU April 3, 2025 at 09:46PM
Show HN: Arrakis – Open-source, self-hostable sandboxing service for AI Agents Hi HN! My name is Abhishek. I've spent my career working on Operating Systems and Infrastructure at places like Replit, Google, and Microsoft. Today, I'm excited to launch Arrakis: an open-source and self-hostable sandboxing service designed to let AI Agents execute code and operate a GUI securely. GitHub: https://ift.tt/bLMRAfl Watch Claude build a live Google Docs clone using Arrakis via MCP – with no re-prompting or interruption. https://www.youtube.com/watch?v=IZ5cAnhAdPQ Key Features - Self-hostable: Run it on your own infra or Linux server. - Secure by Design: Uses MicroVMs for strong isolation between sandbox instances. - Snapshotting & Backtracking: First-class support allows AI agents to snapshot a running sandbox (including GUI state!) and revert if something goes wrong. - Ready to Integrate: Comes with a Python SDK ( https://ift.tt/Wmfzsk5 ) and an MCP server ( https://ift.tt/V059fKj ) out of the box. - Customizable: Docker-based tooling makes it easy to tailor sandboxes to your needs. Sandboxes = Smarter Agents As the demo shows, AI agents become incredibly capable when given access to a full Linux VM environment. They can debug problems independently and produce working results with minimal human intervention. I'm the solo founder and developer behind Arrakis. I'd love to hear your thoughts, answer any questions, or discuss how you might use this in your projects! Get in touch - Email: abshkbh AT gmail DOT com - LinkedIn: https://ift.tt/r5Y0RJf Looking forward to your feedback! https://ift.tt/bLMRAfl April 2, 2025 at 10:38PM
Show HN: Agent File (.af) – An open file format for agents Hi HN - We’re building Agent File (.af), which makes it possible to re-create the exact same agent (including memories, tools, message history, configs, etc.) across different machines. A big difference between LLMs and agents is that agents have associated state: system prompts, editable memory (personality and user information), tool configurations (code and schemas), and LLM/embedding model settings. While you can run the same LLM as someone else by downloading the weights, there’s no “representation” of agents that allows you to re-create an instance of an agent across services. Agent File (.af) is an open standard file format for serializing stateful agents. Originally designed for the Letta framework, .af is a human-readable representation of all the associated state of an agent to reproduce the exact behavior and memories. To demonstrate .af, we also made a few example agents with download links to .af: - MemGPT: An agent with memory management tools for infinite context, as described in the MemGPT paper Deep Research: A research agent with planning, search, and memory tools to enable writing deep research reports from iterative research - Customer Support: A customer support agent that has dummy tools for handling order cancellations, looking up order status, and also memory - Stateless Workflow: A stateless graph workflow agent (no memory and deterministic tool calling) that evaluates recruiting candidates and drafts emails - Composio Tools: An example of an agent that uses a Composio tool to star a GitHub repository We’d love to hear what people think of the agent schema we chose and if we’re missing anything (we included everything that we need from Letta, but there may be other features in other frameworks). https://ift.tt/ZskvOKe April 2, 2025 at 10:14PM
Show HN: A Chrome extension to give you back control over short-form videos Hi HN! I built this little extension to prevent, in my opinion, the most offensive anti-pattern used by tech companies. That is removing the seek bar in short-form videos. The "seek bar" is the bar at the bottom of a video that progresses as you play the video, and that you can click on or drag to skip around. Why companies ever thought it was a good idea to get rid of this I don't know, but I find it infuriating, so I decided to add it back for myself and thought others might like it too. ReelControl adds a progress bar and seeking capabilities to videos on Instagram, YouTube Shorts, and Facebook Reels. I do sometimes enjoy watching short-form content and I've found that with this extension enabled I can be more mindful about it and get sucked in way less. I'm also on my phone less because I tend to favor the web versions of these platforms now. Open source--PRs and issues welcome! https://ift.tt/PjlFpSn https://ift.tt/qclVRHr April 1, 2025 at 05:21PM
Show HN: I built a CLI for one-command fullstack TypeScript projects I built a CLI for scaffolding TypeScript projects with Turborepo, React, and tRPC. It includes TanStack Router/Query, Tailwind, Hono/Elysia backends, Drizzle/Prisma ORMs, and more. npx create-better-t-stack@latest https://ift.tt/1rOdUn0 April 1, 2025 at 11:49PM
Show HN: Zig Topological Sort Library for Parallel Processing I believe the best way to learn a language is by doing an in-depth project. This is my first Zig project intended for learning the ropes on publishing a Zig package. It turns out to be quite solid and performant. It might be a bit over-engineered. This little library is packed with the following features: - Building dependency graph from dependency data. - Performing topological sort on the dependency graph. - Generating dependence-free subsets for parallel processing. - Cycle detection and cycle reporting. https://ift.tt/P57eJXv April 1, 2025 at 11:18PM
Show HN: Monkeys.zip (Infinite Monkeys Writing Shakespeare) Hey HN! I've been working on this concept on and off for about a year, and challenged myself to actually release it in time for April Fools as I tend to just hoard projects. It's a simulator of the Infinite Monkey Theorem! You can browse our grid of monkeys that are busily typing away randomly on their keyboards, and see what words they've written - how many of those words appear in the works of Shakespeare. If you want, you can join in for free and get a monkey of your own. Monkeys get special rewards for typing special words - which can be used to customize their appearance. I just wiped the simulation this morning so we're starting from scratch! It's a little rough around the edges in some spots, if some content doesn't load right, just give it a refresh. I hope you get a kick out of it - it's been an absolute labor of love for me! https://monkeys.zip/ April 1, 2025 at 10:47PM
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