Show HN: Andre – A privacy-first, location-aware assistant that helps you https://bit.ly/3Jhueh9

Show HN: Andre – A privacy-first, location-aware assistant that helps you Hi HN, I've been working on a different kind of life assistant — one that helps in the real world, not just with voice commands or smart speakers. Andre is a privacy-focused, location-aware assistant that does things like: Remind you to take care of errands only when you're near a place to do them Alert you about major events like flight cancellations, gridlocked traffic, or wildfires — and suggest nearby hotels or rentals Adapt to your real routine, without tracking you or selling your data It's early-stage, but I'm sharing it now to get feedback, connect with others building human-first tech, and possibly find collaborators. The site at https://bit.ly/4l6J1sj is still under construction, but it's live. This project is dedicated to the person who gave me the courage to build again — even from a hospital bed. A small tribute, but a real one. Thanks for reading, Bill https://bit.ly/4l6J1sj August 4, 2025 at 12:06AM

Show HN: My Bytecode Optimizer Beats Copilot by 2X https://bit.ly/4foj9XN

Show HN: My Bytecode Optimizer Beats Copilot by 2X https://bit.ly/3J3bGRL July 31, 2025 at 06:15PM

Show HN: Structured Cooperation – A new way of building distributed apps & POC https://bit.ly/4l82MzO

Show HN: Structured Cooperation – A new way of building distributed apps & POC Hey HN, I wanted to share something I've been working on for the past couple of months, which may be interesting to developers interacting with distributed architectures (e.g., microservices). I'm a backend developer, and in my 9-5 job last year, we started building a distributed app - by that, I mean two or more services communicating via some sort of messaging system, like Kafka. This was my first foray into distributed systems. Having been exposed to structured concurrency by Nathan J. Smith's beautiful article on the subject ( https://bit.ly/3HgjXkQ... ), I started noticing the similarities between the challenges of this message-based communication, and that of concurrent programming, and GOTO-based programming before that - actions at a distance, non-trivial tracing of failures, synchronization issues, etc. I started suspecting that if the symptoms were similar, maybe the root cause, and therefore the solution, could be as well. This led me to design something I'm calling "structured cooperation", which is basically what you get when you apply the principles of structured concurrency to distributed systems. It's something like a "protocol", in the sense that it's basically a set of rules, and not tied to any particular language or framework. As it turns out, obeying those rules has some pretty powerful consequences, including: - Pretty much eliminates race conditions caused by eventual consistency - Allows you to recover something resembling distributed exceptions - stack traces and the equivalent of stack unwinding, but across service boundaries - Makes it much easier to reason about the system as a whole I put together three articles that explain: 1) what structured cooperation is ( https://bit.ly/3H7bUXA... ), 2) one way you could implement it ( https://bit.ly/4ol0osb... ), and 3) why it works ( https://bit.ly/44Z2BSD ). I also put together a heavily documented POC implementation in Kotlin, called Scoop (linked in the title). I guess you could call it an orchestration library, similar to e.g. Temporal ( https://bit.ly/40Qy0Ep ), although I want to stress that it's just a POC, and not meant for production use. I was hoping to bounce this idea off the community and see what people think. If it turns out to be a useful way of doing things, I'd try and drive the implementation of something similar in existing libraries (e.g. the aforementioned Temporal, Axon ( https://bit.ly/4laX4NE ), etc. - let me know if you know of others where this would make sense). As I mention in the articles, due to the heterogeneous nature of the technological landscape, I'm not sure it's a good idea to actually try to build a library, in the same way as it wouldn't make sense to do a "structured concurrency library", since there are many ways that "concurrency" is implemented. Rather, I tried to build something like a "reference implementation" that other people can use as a stepping stone to build their own implementations. Above and beyond that, I think that this has educational value as well, and I did my best to make everything as understandable as possible. Some things I think are interesting: - Implementation of distributed coroutines on top of Postgres - Has both reactive and blocking implementation, so can be used as a learning resource for people new to reactive - I documented various interesting issues that arise when you use Postgres as an MQ (see, in particular, https://bit.ly/40N53cv... and https://bit.ly/40N53cv... ) Let me know what you think. https://bit.ly/41k3qmz August 3, 2025 at 03:37PM

Show HN: Visualize your dev project with an AI roadmap tool https://bit.ly/3UaZCAo

Show HN: Visualize your dev project with an AI roadmap tool https://bit.ly/47a6Lsb August 3, 2025 at 12:11PM

Show HN: Voltpeek – A Vim inspired oscilloscope software https://bit.ly/41gC2Gc

Show HN: Voltpeek – A Vim inspired oscilloscope software This is software for my headless, PC based oscilloscope, which is controlled entirely via commands similar to the Vim text editor. I built this because I liked the idea of headless oscilloscopes; I always have my laptop around when I’m working on electronics anyway, and it’s very convenient to save images of captured waveforms. However, I found the software for off the shelf models to be annoying and cumbersome to work with. In my experience, this holds true both when opening the software and connecting to an attached oscilloscope, and when adjusting the scope settings using menus and buttons. I have also built my own oscilloscope hardware for use with Voltpeek. The specs are nothing to write home about (7.5MHz BW, 62.5MS/s), but they should be adequate for some basic debugging and measurement tasks. https://bit.ly/46EcDtJ August 3, 2025 at 01:29AM

Show HN: I made a mobile game you can only play on the toilet https://bit.ly/40NOLQv

Show HN: I made a mobile game you can only play on the toilet https://bit.ly/40Ji32L August 2, 2025 at 10:33AM

Show HN: A Toy Sound Generator https://bit.ly/4la5ogu

Show HN: A Toy Sound Generator https://bit.ly/4fgS6NU August 2, 2025 at 05:17AM

Show HN: Agentic AI Frameworks on AWS (LangGraph,Strands,CrewAI,Arize,Mem0) https://bit.ly/3U5KTGV

Show HN: Agentic AI Frameworks on AWS (LangGraph,Strands,CrewAI,Arize,Mem0) We’ve published a set of open-source reference implementations on how to build production-grade Agentic AI applications on AWS. What’s in the repo: • Agentic RAG, memory, and planning workflows with LangGraph & CrewAI • Strands-based flows with observability using OTEL & Arize • Evaluation with LLM-as-judge and cost/performance regressions • Built with Bedrock, S3, Step Functions, and more GitHub: https://bit.ly/3U9PzM0... Would love your thoughts — feedback, issues, and stars welcome! https://bit.ly/3HdtIQK August 2, 2025 at 01:20AM

Show HN: Windows XP in the browser, with file system, Word, media, flash https://bit.ly/456DcoI

Show HN: Windows XP in the browser, with file system, Word, media, flash https://bit.ly/4mo90wj August 2, 2025 at 02:11AM

Show HN: I made a website that makes you cry https://bit.ly/44YtOoz

Show HN: I made a website that makes you cry https://bit.ly/3Usw9SJ July 28, 2025 at 01:19AM

Show HN: Demitter – Distributed Node.js Event Emitter (Pub/Sub) https://bit.ly/4mlG9ZA

Show HN: Demitter – Distributed Node.js Event Emitter (Pub/Sub) https://bit.ly/4mkmb1p July 31, 2025 at 11:52PM

Show HN: A tool for complete WebSocket traffic control https://bit.ly/3IV6GP0

Show HN: A tool for complete WebSocket traffic control I built a Chrome extension that acts as a WebSocket proxy, allowing real-time monitoring, message simulation, and traffic interception. Think "Proxyman for WebSockets" but integrated into Chrome DevTools. Key features: Real-time WebSocket monitoring and message capture Send custom messages in both directions (client ↔ server) Block incoming/outgoing messages for testing Background monitoring (captures connections even when DevTools is closed) Why: I was debugging a WebSocket chat app and needed better tools than browser DevTools. Existing solutions required external proxies or were too basic. Tech: Injects proxy script to intercept WebSocket constructor, React + Vite UI, Chrome DevTools API integration, MIT licensed. Perfect for debugging WebSocket apps, testing error scenarios, reverse engineering APIs, and QA testing real-time features. Links: GitHub: https://bit.ly/4mdvxvY YouTube Demo: https://www.youtube.com/watch?v=L64x__1xORQ Would love feedback from developers who work with WebSockets regularly! https://bit.ly/47auiJB July 31, 2025 at 04:30AM

Show HN: Host Claude Artifacts on your own domain https://bit.ly/41f1HyY

Show HN: Host Claude Artifacts on your own domain Hi HN, I've been using Claude to generate landing pages and it's a huge time-saver. But, it's hard to go from Artifact -> Published website. That's where Artifact Ninja comes in. How it works: 1. Click "Copy" above your artifact in Claude.ai and paste into Artifact.Ninja 2. We'll generate a static webpage without any Claude branding 3. Use your registrar's "masked forwarding" feature to connect a custom domain Artifact Ninja is a quick utility I needed for my own purposes. It's cheap to host (Cloudflare worker + D1), so it's free! Hope it helps. https://bit.ly/4mm13YJ July 31, 2025 at 02:01AM

Show HN: I use AI to send myself personalized weekly recaps from my saved links https://bit.ly/45uwGJO

Show HN: I use AI to send myself personalized weekly recaps from my saved links Sharing something that I’ve been working on: I made a save-later app for all my bookmarks. I save links throughout the week and, every Sunday morning, the app sends me a personalized recap with: -patterns and themes that connect my week to my broader interests -a nudge toward links I saved but never revisited -one reflective question to help me decide what else might be worth exploring I was inspired by older read-later apps like Instapaper. I wanted to make something minimalist, so it’s just a simple feed of your links (with tags and annotations linked to each link) and it is set up to ingest all kinds of content, not just text. I also did want it to be bloated as the full-fat AI stuff you see recently. So this is a simpler and more proactive take on the concept of a bookmarking app. Imagine if Pocket and Spotify Wrapped had a baby. I also personally enjoy using the chat to find links across subjects and sources with context, like “Show me the 5 links on travel i’ve returned to the most” or “all recipes with porcini mushrooms” or “show me everything on Topic X i’ve made the most notes on.” I’ve posted about this on HN before, always had great feedback. Happy to answer any questions. (I’m not technical, I'm a writer/ filmmaker.) https://bit.ly/4lZxSem July 31, 2025 at 12:08AM

Show HN: I built a satirical Dowry Calculator to highlight a harmful tradition https://bit.ly/4l3Powz

Show HN: I built a satirical Dowry Calculator to highlight a harmful tradition Hi HN, I've created a simple, non-commercial web tool called the Dahej (Dowry) Calculator. Growing up hearing stories within my community about the immense pressure and financial ruin caused by the dowry system in India, I wanted to find a way to talk about this difficult topic. Direct confrontation often shuts down dialogue, so I chose satire as a way to approach it. The calculator is intentionally absurd; it generates a monetary 'worth' based on real-world (and often ugly) factors like profession, salary, and even caste. The goal isn't to be accurate, but to be a conversation starter. It's an educational tool designed to hold up a mirror to a practice that treats marriage like a transaction. There are no ads, trackers, or sign-up requirements. It's just a simple page built with React. I'm here to answer any questions and would love to hear your feedback on using satire and technology for social commentary. Thanks for checking it out. https://bit.ly/4kYHqop July 30, 2025 at 02:57AM

Show HN: Building a Production Finance Model for Open Source https://bit.ly/4kZwEyb

Show HN: Building a Production Finance Model for Open Source It started off with the simple idea to cram together the accountability of Patreon (quit when you want) with the coordinated action of Kickstarter (thresholds). The MVP behind the link demonstrates the very first iteration of this concept. The second big idea was keeping power with the backers. Let communities of users freely move between different people who make stuff instead of being captives like with Star Citizen. This also lets creators focus on making stuff instead of selling the next Solar Roads. Along the way I realized that there are opportunities where the world can deliver a ton of value for not that much cost but the money still can't flow. Why can't the capital move? It's because of value capture difficulty or value production uncertainty. However, the downstream often doesn't care. Consumers and downstream businesses are not sensitive to the profitability of upstream. They want stuff and they don't want to wait on startups to figure out how to bootstrap to profitability to get out of the chicken and egg dilemmas. Deep tech and open IP are those kinds of things. Welcome to https://bit.ly/4o3yqRE . Our mission is to connect demand for downstream value creation to upstream enabling technologies. This Production Finance concept is very broadly applicable. This can be a remedy to the extremely poor monetization of independent media. My main point is that these things are worth building, and PrizeForge is a feature complete product the moment that we realize that we want things like PrizeForge to exist and that this MVP is a way for us to get there faster. For now, I want to focus on the consumer open source market because it's a deeply distressed market where billions of willing dollars are stuck behind the volunteer's dilemma. It's also a simple market because there's no IP law to juggle. Open source has a strong tradition of killing stupid competition and delivering lots of indirect value that pays big dividends. In getting ready for this moment, I pulled together a modest YouTube following, some Github stars, and developed my own takes on where open source thinking needs to go to win. I will be inviting my Github Sponsors over pretty soon and, above all, introducting features on our sub-Reddit to get the iteration dynamo going. The MVP is a full-stack Rust application. It has a Leptos reactive frontend and Axum on the backend, talking to Postgres and NATS. I'll have a lot to say about that while courting some communities and engineers. https://bit.ly/4kZwFCf I came up with the binary fragmentation idea while developing. I was just going to truncate. I chopped out two planned features becuase they were going to require fixed-point calculations. I'm glad I did because last night I crafted a bad kubernetes secret and discovered it only because a header unwrap in Stripe's library was panicking. I am toasted. The Elastic Fund Raising feature was easier to get an MVP going, but our communication and decision delegation tools are probably going to be more impactful. We need social decision systems designed for open communities, from first principles, for the information age, not the age of horses and ballots. I need to cut chase for now. I've got several communities I need to pull together. I've done a lot of ground work to build up my reputational constraints, figuring out video production, and talking to people to find out what clicks. Log in, top-up, and enroll. The system is pre-pay. Funds are not truly mine until matched and I don't want to go to SBF jail, so you can trust me to implement logouts and refunds as soon as possible. Follow my socials and go be social yourselves. It's not about what you can do. It's about what millions of angry gamers who want VKD3D right now can do if only they have a better Kickstarter. https://bit.ly/45aHQlU July 30, 2025 at 02:21AM

Show HN: BreathylBox – A lockbox that only opens when you're sober https://bit.ly/4ohTLHi

Show HN: BreathylBox – A lockbox that only opens when you're sober Hi HN, I'm an incoming college freshman building BreathylBox, a lockbox that stays locked unless you pass a breathalyzer test and authenticate with a passcode. It’s designed to help prevent access to car keys, firearms, or phones when someone’s been drinking. Here’s the landing page: https://bit.ly/3U7xtKq Right now, we’re validating demand across use cases: Parents storing car keys after parties Gun safety in homes with teens People trying to reduce tech use while drinking We’re not selling anything yet — just trying to see if the idea resonates and which use case to prioritize. Would love your feedback: Would you use something like this? What should we do (or avoid) before moving to manufacturing? Any obvious legal or hardware red flags? Thanks in advance — happy to answer any questions! Sean Short, CEO BreathylBox (seanshort@breathylbox.com) https://bit.ly/46DIfzH July 29, 2025 at 11:08PM

Show HN: FastLaunchAPI – A production-ready FastAPI template batteries included https://bit.ly/45ouROB

Show HN: FastLaunchAPI – A production-ready FastAPI template batteries included Hello HN After building numerous FastAPI backends, I consistently found myself repeating the same configuration, including auth, email, payments, migrations, etc. In order to handle all the boilerplate, I developed FastLaunchAPI, a production-ready startup package. Included are: JWT authentication with social login and email Webhooks and Stripe billing together Alembic, PostgreSQL, and SQLAlchemy Background work for celebrities SMTP email that includes templates Integration of LangChain and OpenAI Setup for Pytest + API documents It is designed to bring you to production in less than half an hour and is modular. There is a comprehensive documentation, which can be viewed before pruchase. I would be happy to hear any comments or inquiries! https://bit.ly/3IS9VXr July 28, 2025 at 11:59PM

Show HN: (Ask HN) Color Me Same – A New Kind of Logic Game – Pursue It Further? https://bit.ly/46ybmV2

Show HN: (Ask HN) Color Me Same – A New Kind of Logic Game – Pursue It Further? https://bit.ly/3U5CHX4 July 26, 2025 at 10:22AM

Show HN: 433 - How to Make a Font That Says Nothing https://bit.ly/459H8oM

Show HN: 433 - How to Make a Font That Says Nothing https://bit.ly/45hdxKq July 25, 2025 at 12:05PM