BlogViral

Show HN: ULDA – Client-side encryption with a simple JavaScript API Hi there! We have designed client side encrypted storage that sync on multiple devices and allows to hold that data on your server. We have started as chat application in late 2022 that has completly open-readable database. The idea was simple - server holds zero secrets, like non at all. But we ran into the problem of authentication - there were no auth method what could make quick, synced authorization with completely zero secrets. So in early 2023 we came to an idea of authentication via proof of ownership by providing proof that next step is made by the same user. Now you can see our job as ulda core https://ift.tt/60l2RUL . Ulda was called as universal liniar data authentication. But a year later we faced that “None need another extremely secure chat application” and we decided to export our ideas and share ulda as a method in order to gather some feedback from some smarter people. In 2025 we tried to publish o...

Show HN: we made every cloud work like one giant computer https://ift.tt/97Khcx5 October 20, 2026 at 11:46PM

Show HN: Agent Archive – Session Handoffs and Backups for Claude Code and Codex I often switch between Claude Code and Codex throughout the week, and between my laptop and an older machine I leave running at home. I built agent-archive to make it easier to pick up where I left off, especially when i hit usage limits. It lets you (or a coding agent) find past coding sessions and hand their conversation context to another agent. You can try local handoffs without setup, or connect your own S3/R2 bucket for automatic archiving and access from other machines. It also tracks usage across agents and gives you a full archive of your session transcripts across agents, which I've found useful to iterating and improving my AGENTS.md and lint rules. https://ift.tt/ovDb4R7 October 20, 2026 at 10:54PM

Show HN: ECG Signal Processing Starter Kit – Python, SciPy, and FastAPI https://ift.tt/N5SBUVY October 19, 2026 at 09:30PM

Celebrating Our Safe Driver Award Winners By Andrea Buffa Cassandra Griffin, also known as Cable Car Cassandra, is one of our Safe Driver Award winners this year. Being a Muni operator is an important and challenging job. It’s not easy to drive a cable car, streetcar or 40- or 60-foot bus through the streets of San Francisco. Yet, hundreds of operators have stepped up to the plate and get behind the wheel every day. They keep our city moving up and down San Francisco’s iconic hills. They help people get everywhere, including to work, school, the grocery store and the doctor. And of course, Muni is a great way to get to museums, concerts and sporting... Published 2026-10-19T00:00:00Z https://ift.tt/9ZWwPIo

Show HN: Kramena – Classic books, 20 minutes a day, with spoiler-safe recaps https://ift.tt/MhFDWol October 18, 2026 at 11:02PM

Show HN: Parin – A 2D game engine between raylib and Godot, written in Dlang https://ift.tt/SfQ0HXU October 16, 2026 at 08:22PM

Show HN: Flying rocket car x Flappy Bird https://ift.tt/Iz5962i October 18, 2026 at 12:14AM

Show HN: MacVisor Runs VMs with VLANs and Firewall on Apple Silicon https://ift.tt/eRCQvoU October 16, 2026 at 09:46PM

Show HN: Council AI. Spot biases / hallucinations in top AI models Examples: - The best and worst of AI in 2026. https://ift.tt/KpOAwlo - The best and worst of Trump 2026. https://ift.tt/uza9EiV https://councilai.app October 15, 2026 at 11:19PM

Show HN: Mixdog – stretch your Claude/ChatGPT subscription with 63% fewer tokens https://ift.tt/ImxDk3a October 14, 2026 at 11:33PM

Show HN: XY Music Notation I've been playing around with a new kind of isomorphic music keyboard that uses a base-12 notation, and wanted some sheet music to learn some new music for it. The idea is to represent each note in 12-TET as a number, so N ∈ (0,1,2,3,4,5,6,7,8,9,X,Y). I used codex to build a music score rendering backend based on MuseScore with custom note heads that display the pitch class of each note. I've found it pretty helpful for learning how to play my own instrument, so wanted to share in case anyone else was interested. https://music.xy.dev/ October 14, 2026 at 12:43AM

Show HN: Knitting – A shared-memory concurrency runtime for Node.js,Bun,and Deno https://ift.tt/VKQ86hs October 13, 2026 at 10:19PM

Show HN: Closed Form – OpenAI's 372 math results, explained in plain English https://ift.tt/dyjk0Zr October 12, 2026 at 07:30PM

Show HN: An Atlas of Applied AI https://ift.tt/vaE9rLR October 12, 2026 at 09:15PM

Show HN: LLMxRay an open-source observability tool for LLMs https://ift.tt/QEXb2kq October 12, 2026 at 04:17AM

Show HN: Kindlefall a 3D ARPG in the browser, built with Three.js https://ift.tt/LsgnljH October 12, 2026 at 01:38AM

Show HN: HarmoNova: A modern, customizable Hacker News reader for Chrome https://ift.tt/oU6anOF October 12, 2026 at 01:42AM

Show HN: OpenClear – Self-hosted check and ACH fraud screening for small banks https://ift.tt/BHiAFU7 October 11, 2026 at 11:14PM

Show HN: Throw Alice and Bob into Sagittarius A* Black Hole Lab is an open source physics simulation of a rotating black hole and two observers, Alice and Bob. You can launch Alice and Bob on paths around or into the black hole and watch events play out. The simulation lets you see a slice of the physics with one or two dimensions of space plus one of time. As a fun extra, Alice and Bob each have a beacon that can transmit a radio wave in all directions. The simulation calculates and shows the wavefront of these signals, accounting for the warping of space and time by the black hole. The simulation also records whenever Alice and Bob receive each other's transmission. The simulation takes pains to respect Einstein's equations of general relativity. To the precision of the numerical integration, the effects shown in Black Hole Lab are really what the math of general relativity says will happen. Black Hole Lab specifically uses the Kerr metric, which is an exact solution to...

Show HN: A functioning Celery Man computer Hi HN! It dawned on me that the latest AI models (Minimax H3 Max / Audio, GPT-6 Luna) can finally recreate the computer from the classic Tim & Eric Celery Man sketch. I spent a few days creating it: it has 100% parity with the original script, plus anything you ask for (doggy woof woof man or potato boy). Happy to answer any questions about the pipeline! https://celeryman.fun/ October 11, 2026 at 01:08AM

Show HN: An agent harness for long-running pentests and code audits https://ift.tt/6mCrGAk October 10, 2026 at 10:59PM

Show HN: Let your AI agents paint big arrows, boxes and text on your screen https://ift.tt/pQ2A17z October 9, 2026 at 06:03PM

Show HN: Fabrika, Opinionated Software Factory I built a software factory that focuses on delivering production ready code and making it as easy as possible for humans to underwrite that code. It's a very early version, but I would love feedback. https://ift.tt/ZYb5fMp October 9, 2026 at 11:25PM

Show HN: K10s – A Clickable Kubernetes TUI (Go, Bubble Tea) https://ift.tt/1LItqlN October 9, 2026 at 01:29AM

Show HN: AI SRE Arena, an Open Benchmark for AI SRE Agents on Kubernetes https://ift.tt/Vm5LSlu October 9, 2026 at 12:13AM

Show HN: Durable Actors – OSS Durable Objects with configurable compute Hi HN, we're Thomas and Olivier from Terse ( https://ift.tt/QME4mbJ ) We've built Durable Actors, an open-source alternative to Cloudflare's Durable Objects. A Durable Object/Actor is a tiny server that handles one request at a time and has its own SQLite database. There's exactly one of each in the world and it is addressed by name. This is the perfect primitive for deploying multiplayer agents. Each agent can have its own Durable Actor, and each user can connect to that Actor via websocket. This is fully horizontally scalable. Your users can deploy and share agents at will without putting pressure on a central DB or websocket server. Durable Actors are also great for coordinating agents within a system. Since only one request is handled at a time, you can protect critical data such as a CRM and allow multiple agents to run concurrently without worrying about data races. The only alternative to thi...

Show HN: Browser-Based F1 Game Hello HN, I vibecoded a F1-styled game and it works in the browser. Check it out! https://ift.tt/ozBgt2M October 7, 2026 at 01:07AM

Show HN: Session-continuity, cryptographic proof of session chains https://ift.tt/uvRyHfw October 6, 2026 at 09:52PM

Show HN: SPrav Job AI Client-side career tool with WebGPU and direct ATS queries https://ift.tt/UxFtiMk October 6, 2026 at 11:26PM

Show HN: Nightwatch – a Mac menu-bar app that tells you when tonight is clear Here in the north of England clear nights are at a premium, and it's never guaranteed that you'll be able to see anything but cloud. That's why I developed Nightwatch, so that I could be notified when one of those precious few nights where I could see into the heavens was available. Finding out whether tonight was worth setting up meant reading forecast charts every evening, usually to learn that it was not. Nightwatch does that reading for me. It sits in the Mac's menu bar and refreshes the forecast every 30 minutes. An hour before sunset it sends one notification, and only if there is an unbroken run of clear sky in astronomical darkness long enough to image in. Otherwise it says nothing: no news means "clouds". I hope this is useful for other hobbyist stargazers too! When I was a child I wanted desperately to be an astronaut or a dinosaur. I'm now old enough to be the latter a...

Show HN: I finetuned 1.5B Qwen to near GPT-4o level bash generation perf Purely a hobby side project to see how far I can push a really small model, using (mostly) automated training pipelines Original mention: https://ift.tt/QT7yDEB There were a bunch of requests to release it. Full synthetic data: https://ift.tt/0KsFr73 Models: https://ift.tt/rH01M6q and https://ift.tt/iQFpTr1 Cli https://ift.tt/z3QJmp0 feel free to train/use the data as you wish. https://ift.tt/Nr8e9l1 October 5, 2026 at 10:35PM

Show HN: I built a vacation optimizer and later found out tools like this exist https://ift.tt/7e9BD10 October 4, 2026 at 10:49PM

Show HN: French Revolutionary Calendar https://ift.tt/LgBQtzC October 4, 2026 at 11:38PM

Show HN: Revline – an AI web app that researches TikTok and Instagram for you I build revline because i was trying to figure out how viral content works across tiktok and instagram, since i am mainly developer, i was confused about how to create content that gets me users. Actually going viral requires single founder ( me ) to upload 3-4 videos a day, brainstorming all the formats was not effective to do alone, so i build the agent that does all the scrolling for me. would appreciate feedback https://tryrevline.com/ October 4, 2026 at 01:20AM

Show HN: Automating my 35mm film scanning pipeline https://ift.tt/IYF9z3A October 4, 2026 at 12:35AM

Show HN: Draw from your friends' Claude quota https://ift.tt/WdeKcmt October 3, 2026 at 02:02AM

Show HN: Our space game has a built-in RISC-V emulator that runs Linux We're a tiny indie studio, all with a background in the demoscene and for about 3 years now we're developing a space planet terraforming game called SEEDS - Echoes Beneath the Sands. Our protagonist Naxiah is stranded on a small, desolated planet. You're working for an intergalactic distributor of seeds and terraforming equipment, to kickstart new planets in far away galaxies. You must deliver seeds and utilities to an unchartered region, but on your way, you crash on a small planet. Luckily, you have some equipment with you in the ship, so you're able to spawn a base and survive. But for how long? And is the planet really deserted..? :) Well, of course not, there are aliens and other space creatures. And of course, there's ROBO RB-23, which accompanies your adventure. The game is written in Object Pascal and uses our own game engine PasVulkan, our own physics engine, as well as our own RISC-V 64...

Show HN: We built a real-time desktop companion for patient's telehealth visits Hey HN, Some friends and I built an app called Sidekick that joins your telehealth visits in real-time. It explains medical terms and suggests useful questions, including ones you may not have thought to ask. After the visit, it provides a summary including next steps, so you can focus on the conversation instead of taking notes. The idea of Sidekick came from our team's experiences with healthcare. Our founder, Rahul, had stage three cancer at 17. His mom had to manage everything around his care: taking notes through treatment, figuring out what questions to ask, etc. A decade later and he’s now in remission, but still sees a lot of specialists and deals with the same challenges. Another teammate became a caregiver after his dad had a severe stroke. He found himself taking notes, looking up medical terms, and trying to keep track of what was said during every doctor visit. Others have dealt with si...

Show HN: Open-source model routing for coding agents at Astra-level performance A few months ago we started building a model router for coding agents because we thought we could outperform any single model with an ensemble approach. Recently we’ve achieved that milestone and I want to talk about how we did it. First of all, a quick explanation: the Weave Router ( https://ift.tt/u4bXShG ) plugs into any coding agent (e.g. Claude Code or Codex) and intelligently switches between LLMs. So, for example, Astra handles tricky debugging or complex system design tasks, and Deepseek v4 Flash handles simple frontend updates. What we’re announcing today is our new routing model, which we’re calling Weave Router 2.0. We benchmarked 2.0 against GPT-6 Astra on Terminal Bench 4.0 and SWE Atlas. On both benchmarks, the router had equivalent pass rates. On Terminal Bench, the router hit 52% of Astra’s cost, and completed tasks 2.2x faster. On SWE Atlas, the router cost 54% as much as Astra and ran 2.5x...

Show HN: Gutsy, a 0.8B Jev-compatible decision model that runs on your CPU https://ift.tt/nX1VAai October 1, 2026 at 10:44PM