Show HN: FingerGo – lightweight cross-platform touch-typing trainer https://ift.tt/UTaDJN8

Show HN: FingerGo – lightweight cross-platform touch-typing trainer https://ift.tt/zJFrT7P December 6, 2025 at 10:19PM

Show HN: TapeHead – A CLI tool for stateful random access of file streams https://ift.tt/sBdFvJr

Show HN: TapeHead – A CLI tool for stateful random access of file streams I wrote this tool while debugging a driver because I couldn't find a tool that allowed me to open a file, seek randomly, and read and write. I thought it might one day be useful to someone too. https://ift.tt/6TcYjH1 December 7, 2025 at 01:53AM

Show HN: Stateless compliance engine for banking and blockchain https://ift.tt/dfOtgQo

Show HN: Stateless compliance engine for banking and blockchain I’ve been working on a stateless compliance engine that validates IBAN/SWIFT, OFAC lists, ISO20022 (pain.001/pacs.008), and multi-chain data (ETH, BTC, XRPL, Polygon, Stellar, Hedera). Statelessness feels important in financial and blockchain workflows because no user data persists between requests, outputs are fully deterministic, and auditors can reproduce results without relying on stored state. Current progress: • Deterministic validators live and callable • On-chain checks working across 6 networks • ISO20022 structuring + downloadable PDFs • AWS backend deployed; Azure environment being added for multi-cloud isolation Looking for technical critiques or alternative patterns for building stateless compliance systems. https://ift.tt/eGkD7nN December 7, 2025 at 12:10AM

Show HN: Bible Note Journal – AI transcription and study tools for sermons (iOS) https://ift.tt/uX9QtTH

Show HN: Bible Note Journal – AI transcription and study tools for sermons (iOS) I got back into church a couple years ago and would try taking notes with Apple Notes. It was a struggle trying to type notes while focusing on the sermon. Honestly, it would have been easier to write it in a notebook but in the end I built this iOS app to solve that problem. You can record audio during a sermon (or upload files), and it transcribes using Whisper, then generates summaries, flashcards, and reflection questions tailored to Christian content. The backend is Spring Boot + Kotlin calling OpenAI's API. Instead of deploying the backend through one of the cloud providers directly I decided to go with Railway. Users are notified with push notifications when their transcription and summary are completed. The iOS app uses SwiftUI and out-of-the-box SwiftUI components. I worked with Spring Boot + Java a few years back when in fintech so it was cool to try writing something in Kotlin. I'm also a full-time Flutter dev that has been trying to get into Native iOS development and felt like I found a good use case for an app. Currently only available in the US/Canada App Store. There is a free 3-day trial that you can use to give the app a go. The goal was helping Christians retain more from sermons and build stronger biblical literacy. Happy to answer questions about the architecture, AI prompting approach for Christian content, or anything else. App Store link: https://ift.tt/UeW9KBk... https://ift.tt/1MDxpSe December 6, 2025 at 02:13AM

Show HN: HCB Mobile – financial app built by 17 y/o, processing $6M/month https://ift.tt/WO8aq4x

Show HN: HCB Mobile – financial app built by 17 y/o, processing $6M/month Hey everyone! I just built a mobile app using Expo (React Native) for a platform that moves $6M/month. It’s a neobank used by 6,500+ nonprofit organizations across the world. One of my biggest challenges, while juggling being a full-time student, was getting permission from Apple/Google to use advanced native features such as Tap to Pay (for in-person donations) and Push Provisioning (for adding your card to your digital wallet). It was months of back-and-forth emails, test case recordings, and also compliance checks. Even after securing Apple/Google’s permission, any minor fix required publishing a new build, which was time-consuming. After dealing with this for a while, I adopted the idea of “over the air updates” using Expo’s EAS update service. This allowed me to remotely trigger updates without needing a new app build. The 250 hours I spent building this app were an INSANE learning experience, but it was also a whole lot of fun. Give the app a try, and I’d love any feedback you have on it! btw, back in March, we open-sourced this nonprofit neobank on GitHub. https://ift.tt/eKQcL0v https://ift.tt/LRvjrGX December 3, 2025 at 09:50AM

Show HN: SerpApi MCP Server https://ift.tt/9d6gxUI

Show HN: SerpApi MCP Server https://ift.tt/2cfKJdv December 6, 2025 at 12:00AM

Show HN: Playwright for Windows Computer Use https://ift.tt/bEjixte

Show HN: Playwright for Windows Computer Use https://ift.tt/SJXVenh December 5, 2025 at 04:15AM

Show HN: Claude-ping – a WhatsApp bridge for Claude Code https://ift.tt/4pwgkyd

Show HN: Claude-ping – a WhatsApp bridge for Claude Code A built a small WhatsApp bridge to keep track of claude code projects as they run on my laptop. There is an experimental permission hook to allow proxying of permission requests via the WhatsApp bridge. All messages are sent via a personal channel. https://ift.tt/cpIeNOq December 5, 2025 at 02:40AM

Show HN: Cheap OpenTelemetry lakehouses with Parquet, DuckDB, and Iceberg https://ift.tt/D83OpKt

Show HN: Cheap OpenTelemetry lakehouses with Parquet, DuckDB, and Iceberg Side project: exploring storing and querying OpenTelemetry data with duckdb, open table formats, and cheap object storage with some rust glue code. Yesterday, AWS made this exact sort of data architecture lot easier with new CloudWatch features: https://ift.tt/cCuRnBb... https://ift.tt/JFbhetU December 5, 2025 at 02:12AM

Show HN: HCL-Schema – Create HCL Schemas Using HCL Files https://ift.tt/zvAklnf

Show HN: HCL-Schema – Create HCL Schemas Using HCL Files https://ift.tt/xm0DMVb December 4, 2025 at 01:25AM

Show HN: Niccup – Hiccup-Like HTML Generation in ~120 Lines of Pure Nix https://ift.tt/yEQgRJs

Show HN: Niccup – Hiccup-Like HTML Generation in ~120 Lines of Pure Nix Yesterday I saw https://ift.tt/8s7SupB (Nixtml: Static website and blog generator written in Nix) and before I clicked on it, I thought it was gonna be a polished version of something I've hacked together myself in the past few weeks, but it was something else, so since seeing it, I've been polishing my hacked together Hiccup-alternative made with Nix, and I think it's good enough for some feedback from the outside world :) The basic premise is to take a Nix expression like this: [ "div#main.container" { lang = "en"; } [ "h1" "Hello" ] ] And turn it into HTML like this:

Hello

Nothing more, nothing less. Just "Nix Expressions/Data > HTML". If you've used hiccup ( https://ift.tt/z0iv5HZ ) before this will be immediately familiar to you, native data types in arrays transformed into HTML, and it matches really well with Nix! Kind of almost took me by surprise. I've made some more involved examples available on the website, where the website itself is also dynamically generated with niccup: https://embedding-shapes.github.io/niccup/ And if that wasn't enough, I also added a quine example on the website itself, which if you copy-paste the two files you get a built version of the page itself: https://embedding-shapes.github.io/niccup/examples/quine/ (this was probably the most tricky and fun part of this whole project, so worth mentioning separately for sure) I've used it to generate documentation websites and some smaller projects so far, but hasn't been used by others before, so I'm eager to hear what people think about it! Thank you for reading and your temporary attention! GitHub repository: https://ift.tt/7jFluEY (~800 lines of Nix in total, main implementation src/lib.nix is only ~120 lines though) The source of the blog itself: https://ift.tt/Fu8rRcT.... (~150 lines of Nix) https://embedding-shapes.github.io/introducing-niccup/ December 4, 2025 at 01:16AM

Show HN: Patternia – A Zero-Overhead Pattern Matching DSL for Modern C++ https://ift.tt/qw4MKAC

Show HN: Patternia – A Zero-Overhead Pattern Matching DSL for Modern C++ https://ift.tt/v5timGX December 4, 2025 at 12:47AM

Show HN: Microlandia, a brutally honest city builder https://ift.tt/9pyb3mO

Show HN: Microlandia, a brutally honest city builder It all started as an experiment to see if I could build a game making heavy use of Deno and its SQLite driver. After sharing an early build in the „What are you working on?“ thread here, I got the encouragement I needed to polish it and make a version 1.0 for Steam. So here it is, Microlandia, a SimCity Classic-inspired game with parameters from real-life datasets, statistics and research. It also introduces aspects that are conveniently hidden in other games (like homelessness), and my plan is to continue updating, expanding and perfecting the models for an indefinite amount of time. https://ift.tt/qevxJFK December 3, 2025 at 11:48PM

Show HN: Rhubarb – C89 Libraries in Latin https://ift.tt/h5ZrFCf

Show HN: Rhubarb – C89 Libraries in Latin Considering all the supply chain dependencies lately I've been building a collection of C89 libraries to make zero dependency stuff. For fun I have also been programming it in latin! Still very much in progress. https://ift.tt/wHn5eiz November 29, 2025 at 10:09PM

Show HN: Golang Client Library for Gradium.ai TTS/STT API https://ift.tt/kegQfHq

Show HN: Golang Client Library for Gradium.ai TTS/STT API https://ift.tt/7g0RqSt December 3, 2025 at 01:22AM

Show HN: SMART report viewer – Simple tool to analyze smartctl outputs https://ift.tt/CBuKRcy

Show HN: SMART report viewer – Simple tool to analyze smartctl outputs https://ift.tt/1uhscEF December 3, 2025 at 12:29AM

Show HN: RFC Hub https://ift.tt/FCtnL7e

Show HN: RFC Hub I've worked at several companies during the past two decades and I kept encountering the same issues with internal technical proposals: - Authors would change a spec after I started writing code - It's hard to find what proposals would benefit from my review - It's hard to find the right person to review my proposals - It's not always obvious if a proposal has reached consensus (e.g. buried comments) - I'm not notified if a proposal I approved is now ready to be worked on And that's just scratching the surface. The most popular solutions (like Notion or Google Drive + Docs) mostly lack semantics. For example it's easy as a human to see a table in a document with rows representing reviewers and a checkbox representing review acceptance but it's hard to formally extract meaning and prevent a document from "being published" when criteria isn't met. RFC Hub aims to solve these issues by building an easy to use interface around all the metadata associated with technical proposals instead of containing it textually within the document itself. The project is still under heavy development as I work on it most nights and weekends. The next big feature I'm planning is proposal templates and the ability to refer to documents as something other than RFCs (Request for Comments). E.g. a company might have a UIRFC for GUI work (User Interface RFCs), a DBADR (Database Architecture Decision Record), etc. And while there's a built-in notification system I'm still working on a Slack integration. Auth works by sending tokens via email but of course RFC Hub needs Google auth. Please let me know what you think! https://rfchub.app/ December 1, 2025 at 10:34PM

Show HN: An AI zettelkasten that extracts ideas from articles, videos, and PDFs https://ift.tt/Vad0z3l

Show HN: An AI zettelkasten that extracts ideas from articles, videos, and PDFs Hey HN! Over the weekend (leaning heavily on Opus 4.5) I wrote Jargon - an AI-managed zettelkasten that reads articles, papers, and YouTube videos, extracts the key ideas, and automatically links related concepts together. Demo video: https://youtu.be/W7ejMqZ6EUQ Repo: https://ift.tt/urXmGYC You can paste an article, PDF link, or YouTube video to parse, or ask questions directly and it'll find its own content. Sources get summarized, broken into insight cards, and embedded for semantic search. Similar ideas automatically cluster together. Each insight can spawn research threads - questions that trigger web searches to pull in related content, which flows through the same pipeline. You can explore the graph of linked ideas directly, or ask questions and it'll RAG over your whole library plus fresh web results. Jargon uses Rails + Hotwire with Falcon for async processing, pgvector for embeddings, Exa for neural web search, crawl4ai as a fallback scraper, and pdftotext for academic papers. https://ift.tt/urXmGYC December 1, 2025 at 11:50PM

Show HN: Memory Lane – bootstrap your naive Claude instances with their history https://ift.tt/LBMiSTC

Show HN: Memory Lane – bootstrap your naive Claude instances with their history https://ift.tt/gU2Xruc December 1, 2025 at 02:34AM

Show HN: A fun password strength meter I made for my teenage kids and friends https://ift.tt/2NmTcbV

Show HN: A fun password strength meter I made for my teenage kids and friends https://passwordcat.top December 1, 2025 at 01:03AM