Show HN: Npunlock – Run custom C kernels for Intel NPUs https://ift.tt/nI4vQ2Y

Show HN: Npunlock – Run custom C kernels for Intel NPUs https://ift.tt/WwYrDe0 September 22, 2026 at 09:58AM

Show HN: Napkin – a scratchpad that holds texts and images for copy https://ift.tt/gM4RWt9

Show HN: Napkin – a scratchpad that holds texts and images for copy Napkin is a simple scratchpad to hold text and images to copy later or until you don't need them anymore, or when you don't want to organize temporary files. Clipboard does a similar kind of job, but it is essentially meant for copy and paste, it is volatile. Normally, you can't access the image or text you copied 10 days ago on clipboard. And that's fine—that's what clipboards are meant for. Napkin lets you create napkins on which you can add or paste pieces of text, URLs, and images. You can edit the text, insert images from your desktop, and copy any item at any time for further use somewhere else. Keep the app running in background, and reuse the items you pasted. Nothing is organized. You don't have to give anything a title or add tags. This is where all your mess gets dumped until you decide it's no longer useful and delete it. Just like a scratchpad! Deleted napkins go into the trash and are kept there for N days (30 by default), which you can change in the settings. Napkins older than X days (30 by default) will be flagged for deletion. You can change this period in the settings as well. You can also empty the trash, after which the files will be permanently deleted from your desktop. AI disclosure: This is a vibe-coded project. I spent most of my time testing it on Linux. Windows testing wasn't done properly, although it did run on Windows with some issues. If you try it, please test it on your system as well, and if you find any problems, feel free to submit an issue. Some notes you may need to know: - Linux builds are tested on Arch/KDE/Wayland. Windows builds and passes the full suite in CI, I ran older versions on real hardware and they worked. It is an unsigned build, so SmartScreen will warn you. - There is no global capture hotkey yet, which is the thing I most want. It needs the XDG GlobalShortcuts portal, and the session handshake. I cannot develop it headless. - There is no at-rest encryption. A scratch surface ends up holding tokens and passwords. The data directory is 0700 and excluded from desktop search, but that is retention, not encryption. Github URL : https://ift.tt/kFp7Y5Q https://ift.tt/kFp7Y5Q September 23, 2026 at 01:34AM

Show HN: Sbm: plain-text bookmarks synced across terminal, browser, Android https://ift.tt/3rcR6AY

Show HN: Sbm: plain-text bookmarks synced across terminal, browser, Android https://sbmsync.com September 22, 2026 at 11:54PM

Show HN: Watch all the AI agents on your machine https://ift.tt/sI49ROW

Show HN: Watch all the AI agents on your machine https://ift.tt/kDYQcmB September 22, 2026 at 07:57AM

Show HN: An atlas of system designs with interactive architecture diagrams https://ift.tt/yCqOdU3

Show HN: An atlas of system designs with interactive architecture diagrams https://atlas-sysdes.vercel.app/ September 22, 2026 at 07:54AM

Show HN: WebGCM – a global climate model running in the browser on WebGPU https://ift.tt/q2JXkgI

Show HN: WebGCM – a global climate model running in the browser on WebGPU I started this four and a half years ago. I wanted to build a climate model as both a toy and educational tool that I could visualize in a web browser. I have always been interested in meteorology and asked r/ClimateScience for advice on the math and physics on building an in-browser climate model as an educational tool, and a few people said it was far too ambitious. They were right. I could build the geometry, an icosahedral hexagonal grid on a globe, and I have an intuitive understanding of the math but integrating the Navier-Stokes equations and the physics proved to be too difficult for me, and the closest I got after nearly of month of work was a model that blew up within two simulated days. Fast forward 4 and a half years. I figured that if models like Claude and GPT Astra could solve a milennium prize problem about fluid dynamics then they could help me fix the broken model and iterate on it until my vision was realized. On Friday, I threw down $200 for a Claude Max subscription, and this is the result of a single weekend's work on top of where I had left off. What it is now, in technical terms: a hydrostatic primitive-equation atmosphere on that hex grid (the TRiSK scheme MPAS uses), 27 levels, about 41,000 cells at 110 km, with grey radiation, moist convection, a boundary layer, sea ice, a land surface with snow, a two-layer ocean and real topography. Every kernel runs on the GPU; on my MacBook Pro (M1 Max) it does about 70 simulated hours a minute from a six-year spin-up, hence the 50 MB first load. You can color the globe by twenty-odd fields, animate wind or currents, draw isobars, or view it from space under the model's own sun. The URL captures the view, so links open specific places. Caveats: an educational model, not a validated one. It runs about four degrees colder than Earth and I'm still tuning it, the ocean is crude and shallow, and it needs WebGPU (Chrome, Edge, Safari 26) for best performance. It's currently tuned for my specific machine specs but I suspect it will run well on most desktop-class Apple Silicon machines from the past 5 years. Source and design notes: https://ift.tt/MjZJdUA Edit: If it runs really well on your machine, something well above 100 simulated hours per minute (displayed on the top-left of the page), let me know your machine specs! You should also try to reload the page with `?N=128` in the query params and it will re-grid to an even higher resolution. But it will take a few simulated days to settle down after the initial shock from the changed resolution. If you end up tyring this, check out the Temperature overlay at 10 hPa height and you should see Gravity Waves [1] rippling through the top of the atmosphere! [1] https://ift.tt/mZlPNDO https://ift.tt/IlpG2N5 September 21, 2026 at 06:15PM

Show HN: Primescript – Academic Markdown editor with vector search and LaTeX https://ift.tt/xTY841F

Show HN: Primescript – Academic Markdown editor with vector search and LaTeX https://primescript.com September 21, 2026 at 11:29PM