Show HN: DataKit, your all in browser data studio is open source now https://bit.ly/4oTeIYg

Show HN: DataKit, your all in browser data studio is open source now Hey HN! I'm open-sourcing DataKit today. GitHub: https://bit.ly/3XKUx3t Live demo: https://bit.ly/3MvmV7e DataKit is a browser-based data analysis platform that processes multi-gigabyte files (CSV, Parquet, JSON, Excel) entirely client-side using DuckDB-WASM. Your data never leaves your browser. What it does: • Process large files (tested up to 20GB) without any server • Full SQL interface powered by DuckDB compiled to WebAssembly • Python notebooks via Pyodide for data science workflows • Connect to remote sources (PostgreSQL, MotherDuck, S3) with optional proxy • AI assistant that only sees column schemas, not actual data I was done with having to choose between cloud tools and heavy local installations. I wanted something that just works in a browser tab but has real power. It's AGPL licensed with commercial licenses available for enterprises. I've been building this solo as a side project for the past few months. Would love your feedback on: - Performance bottlenecks you encounter - Features you'd need for your workflows - The architecture decisions (all client-side vs hybrid) https://bit.ly/3XF2Iyn December 8, 2025 at 09:15PM

Show HN: I've asked Claude to improve codebase quality 200 times https://bit.ly/4pUwqv9

Show HN: I've asked Claude to improve codebase quality 200 times https://bit.ly/3KPxj9o December 8, 2025 at 10:33PM

Show HN: Crier – Push notifications via TCP or MQTT (no public IP needed) https://bit.ly/44go88C

Show HN: Crier – Push notifications via TCP or MQTT (no public IP needed) https://bit.ly/48GUxXa December 8, 2025 at 07:50AM

Show HN: I replaced my premium workout app with vibecode https://bit.ly/48APXty

Show HN: I replaced my premium workout app with vibecode I was going through my app subscriptions and realized I was paying $15 for a pretty good workout app, which seemed a bit high to me. As a software engineer who is also well versed in claude code, I realized that I could likely vibecode a very similar app, or even build something more to my liking. I challenged my self to build something roughly equivalent this afternoon. Workflow was: start with a detailed spec from Claude code describing many of the features common in workout apps. Then paste this into lovable to have it build out the initial mvp. Once that was built, I used claude code extensively to modify the app until it was usable, including adding an import from the costly premium app. While there are bugs, I think I might use this app. And it is insane that we are in a place where I can build this on my phone during an afternoon. In a few years, the economics of apps is going to be different, at least for folks willing to work a little bit. In theory this project will save me over $190 a year. https://bit.ly/4a30wrO December 8, 2025 at 01:55AM

Show HN : WealthYogi - Net worth Tracker https://bit.ly/48oFwdN

Show HN : WealthYogi - Net worth Tracker Hey everyone I’ve been on my FIRE journey for a while and got tired of juggling spreadsheets, brokers, and bank apps — so I built WealthYogi, a privacy-first net worth tracker focused on clarity and peace of mind. Why Like many FIRE folks, I was juggling spreadsheets, bank apps, and broker dashboards — but never had one clear, connected view of my true net worth. Most apps required logins or shared data with third parties — not ideal if you care about privacy. So I built WealthYogi to be: Offline-first & private — all data stays 100% on your device Simple — focus purely on your wealth trajectory, not budgeting noise Multi-currency — 23 currencies, supporting GBP, USD, EUR, INR and more What it does now * Tracks your net worth and portfolio value in real time * Categorises assets (liquid, semi-liquid, illiquid) and liabilities (loans, mortgages, etc.) * Multi-currency support (GBP, USD, EUR, INR and more) * Privacy-first: all data stays 100% on your device * 10+ Financial Health Indicators and Personalised Finance Health Score and Suggestions to improve * Minimal, distraction-free design focused purely on your wealth trajectory Planned features (already in development) Real-time account sync Automatic FX updates Import/Export support More currency account types Debt tracking Net worth forecasting Pricing Free Trial for 3 days. One time deal currently running till 10th December. Monthly and Yearly Subscriptions available. Would love your feedback 1. Try the app and share honest feedback — what works, what feels clunky 2. Tell us what features you’d love to see next (especially FIRE-specific ideas!) 3. Share how you currently track your net worth — spreadsheet, app, or otherwise Here’s the link again: WealthYogi on the App Store ( https://apple.co/3MoR6wT ) WealthYogi on the Android ( https://bit.ly/449m2ra... ) Demo ( https://youtu.be/KUiPEQiLyLY ) I am building this for the FIRE and personal finance enthusiasts, and your feedback genuinely guides our roadmap. — The WealthYogi Team hello@datayogi.io https://apple.co/4pqarfZ December 8, 2025 at 01:13AM

Show HN: Geetanjali – RAG-powered ethical guidance from the Bhagavad Gita https://bit.ly/48WlHdZ

Show HN: Geetanjali – RAG-powered ethical guidance from the Bhagavad Gita I built a RAG application that retrieves relevant Bhagavad Gita verses for ethical dilemmas and generates structured guidance. The problem: The Gita has 701 verses. Finding applicable wisdom for a specific situation requires either deep familiarity or hours of reading. How it works: 1. User describes their ethical dilemma 2. Query is embedded using sentence-transformers 3. ChromaDB retrieves top-k semantically similar verses 4. LLM generates structured output: 3 options with tradeoffs, implementation steps, verse citations Tech stack: - Backend: FastAPI, PostgreSQL, Redis - Vector DB: ChromaDB with all-MiniLM-L6-v2 embeddings - LLM: Ollama (qwen2.5:3b) primary, Anthropic Claude fallback - Frontend: React + TypeScript + Tailwind Key design decisions: - RAG to prevent hallucination — every recommendation cites actual verses - Confidence scoring flags low-quality outputs for review - Structured JSON output for consistent UX - Local LLM option for privacy and zero API costs What I learned: - LLM JSON extraction is harder than expected. Built a three-layer fallback (direct parse → markdown block extraction → raw_decode scanning) - Semantic search on religious texts works surprisingly well for ethical queries - Smaller models (3B params) work fine when constrained by good prompts and retrieved context GitHub: https://bit.ly/4pYgN6a Happy to discuss the RAG architecture or take feedback. https://bit.ly/4pSS1Ea December 7, 2025 at 06:18AM

Show HN: FuseCells – a handcrafted logic puzzle game with 2,500 levels https://bit.ly/3MKQIsD

Show HN: FuseCells – a handcrafted logic puzzle game with 2,500 levels Hi everyone, I built FuseCells, a minimalistic logic puzzle game where every level is handcrafted (no procedural generation). It started as a personal challenge to design a clean rule-set and scale it to thousands of puzzles without losing difficulty balance. What’s unique: • 2,500 handcrafted levels across multiple grid sizes • Deterministic logic — no guessing required • A rule system inspired by constraint-solving and path-finding concepts • Daily challenges and global progress tracking • Fully built as a solo dev project Technical notes for those curious: • Level generation tools I wrote validate solvability using a custom constraint solver • Difficulty is estimated via step-count of the solver • The game is optimized to run smoothly on low-end devices • Designed first for iOS, now fully adapted for iPad as well I’d love feedback from puzzle lovers, game designers, and anyone interested in handcrafted logic design. Here’s the App Store link: [inserați linkul] Thanks for reading — happy to answer any technical questions! https://apple.co/48WEXYL December 7, 2025 at 12:51AM

Show HN: Watsn.ai – Scarily accurate lie detector https://bit.ly/48Fs8ki

Show HN: Watsn.ai – Scarily accurate lie detector No signup required—just upload or record a video to verify its truthfulness. You can test it on anyone: internet clips, your significant other, or even yourself. I'm aware there are tons of scammy 'lie detector' apps out there, but I built this using SOTA multimodal models in hopes of creating a genuine breakthrough in the space. It analyzes micro-expressions, voice patterns, and context. In my own testing (over 50 trials), it reached about 85% accuracy, which honestly felt a bit scary. It’s also fun to test on famous YouTube clips (like Obama talking about UFOs). I’d love to hear what you think and will be improving Watsn.ai every day based on your feedback! https://bit.ly/3K4hlbm December 7, 2025 at 12:48AM

Show HN: Prophit – The AI Search Engine For Stocks https://bit.ly/4ayn97u

Show HN: Prophit – The AI Search Engine For Stocks https://bit.ly/4rCH4sl December 6, 2025 at 08:59AM

Show HN: Ogblocks – Create Jaw Dropping UIs with Simple Drag and Drop https://bit.ly/3MpB5Xt

Show HN: Ogblocks – Create Jaw Dropping UIs with Simple Drag and Drop Hello everyone, I’m Karan — officially a Frontend Developer, but honestly, I relate more to being a Design Engineer because crafting beautiful interfaces is what I love most. When I began my coding journey, frontend instantly hooked me. I stuck with it because it felt like the perfect blend of logic and creativity. However, over time, I noticed something interesting: many of my developer friends dreaded writing CSS. Building clean, polished UIs takes time, patience, and a ridiculous amount of pixel-perfect tweaking. Yet, those same friends still wanted their projects to feel premium — smooth animations, modern layouts, and a top-tier user experience. That got me thinking… “What if anyone could drop stunning animated components into their site — without needing deep CSS knowledge?” Fast forward six months of late nights, trial and error, and way too much caffeine… and that idea became ogBlocks. ogBlocks is an Animated UI Library for React, packed with components that look premium and feel production-ready right out of the box. You’ll find navbars, modals, buttons, feature sections, text animations, carousels, and tons more — all designed to instantly level up your UI. I know you'll love it, just check it out Best Karan https://bit.ly/4qRnEzg December 6, 2025 at 05:06AM

Show HN: Radioactive Pooping Knights https://bit.ly/48BON13

Show HN: Radioactive Pooping Knights I've been having fun building out a really simple chess learning app for my daughter (7). It started with just "maze like" puzzles [1] and I've added a few more. This "radioactive pooping knights" idea came from an Irish primary school chess website [2]. Really simple idea, two knights moving around the board leaving poo behind... Don't be the one forced to step on it. * best played with sound on. [1]. https://bit.ly/48BOPGd [2]. https://bit.ly/48t5204 *highly subjective, may not be better for you to play with sound at all ;) p.s. Any "buy me a coffee" goes to my daughter. Annoyingly they only pay out once you get above $10 USD and I think it's currently sitting at 9.85 or something! https://bit.ly/48I2hZa December 6, 2025 at 03:43AM

Show HN: A new AI driven task management tool https://bit.ly/4rLCkAE

Show HN: A new AI driven task management tool I built it for myself. After a lot of iterations, this is getting some traction. It helps me organize my personal life. Still trying to figure out what else it needs to do, and what can be improved. Please provide feedback! https://bit.ly/3Kg3D5h December 5, 2025 at 10:35PM

Show HN: Travel ESIM Comparison https://bit.ly/48Ps7eV

Show HN: Travel ESIM Comparison https://bit.ly/4rDijMz December 5, 2025 at 10:50AM

Show HN: Who is hiring" search tool with chat / other features https://bit.ly/44cjfgR

Show HN: Who is hiring" search tool with chat / other features Hi HN, There are several tools that help you search through the monthly "Who is Hiring" posts on Hacker News. The primary difference with this one is it includes chat, semantic search as well as a semantic map visualization (select "business" from the dropdown and expand to get a sense of how this can be used). Behind the scenes it uses LLM instructions in batch to extract, format, tag the job posts, computes UMAP after everything settles while of course making everything searchable. You can use the basic text search to quickly filter the results or alternatively use semantic search (toggle via the button in the search bar). Finally, you can chat with the job postings as well (click the Chat button). It has a basic RAG type pipeline but also includes some tools which make it possible to ask broader questions like "What are the general themes in the job postings this month?" and dig down from there. Anyway, I hope people find this useful. Any feedback is welcome (either here directly or feel free to use the contact page here https://bit.ly/3MhHGmW which dog foods the same mechanism - no contact info required). If you want to build something similar there is an API and a nice (in my opinion) CLI tool than can be used to ingest data, search or chat as well. https://bit.ly/4oxfBVZ December 5, 2025 at 06:10AM

Show HN: Vibe Commander https://bit.ly/3MhlUQd

Show HN: Vibe Commander https://bit.ly/4pQjVAD December 5, 2025 at 04:10AM

Show HN: Flooder – Making Persistent Homology Practical for Industrial Use Cases https://bit.ly/446uCqG

Show HN: Flooder – Making Persistent Homology Practical for Industrial Use Cases https://bit.ly/3MkA0jN December 5, 2025 at 03:09AM

Show HN: AI music and auto-charting and custom rhythm minigame sandbox https://bit.ly/4aekfVF

Show HN: AI music and auto-charting and custom rhythm minigame sandbox I've been tinkering with a browser-based rhythm game creation tool. The pitch is simple: AI makes the music, Essentia.js figures out the beats, and you write the game logic in JS. Demo: https://bit.ly/44Fm4XP The problem I wanted to solve: most rhythm game workflows are heavy. Proprietary editors, manual charting, fixed gameplay patterns, desktop-only. I wanted something where you could just... open a browser tab and start messing around. How it works: - Music comes from AI services (Suno/Udio). No user uploads, no copyright headaches. - Essentia.js (WASM port) runs entirely in-browser. Beat tracking, onset detection, energy curves, segment boundaries, all client-side. - The output is a timing-only chart. What you do with that timing is up to you. The fun part is the minigame sandbox. Charts and gameplay are completely decoupled. You define spawn rules, input handling, rendering, all in short JS functions. Same chart can become a taiko-style drum game, a directional swipe thing, or something experimental. Preview runs instantly. Tech: Next.js, Essentia.js, custom rhythm engine, Canvas rendering, deployed on Vercel. Current state: playable with sample tracks, chart generation works, minigame workshop is functional. In-platform AI music generation (prompt to track to playable) is next. Still rough around the edges. If you've worked with WebAudio or rhythm engine internals, curious what you think. Feedback welcome. https://bit.ly/44Fm4XP December 4, 2025 at 04:08AM

Show HN: From Personal Script to Public Tool – How I Built a Windows Setup Gen https://bit.ly/4ppWVsM

Show HN: From Personal Script to Public Tool – How I Built a Windows Setup Gen https://bit.ly/4pLlNuz December 4, 2025 at 04:51AM

Show HN: EchoCopi Local-first, model-agnostic alternative to Google Antigravity https://bit.ly/4iBSlox

Show HN: EchoCopi Local-first, model-agnostic alternative to Google Antigravity I've been building an AI agent framework for myself for the last year because I got tired of re-explaining context to my LLM every morning. Google just announced "Antigravity" to solve this, which looks amazing, but it locks you into their cloud and their models (Gemini). I wanted something that: 1. Runs 100% locally on my machine. 2. Works with any model (I switch between Claude 3.5 Sonnet and GPT-4o). 3. Persists memory in simple JSON files I can edit/version control. I call it *EchoCopi*. It's a Python-based "memory organ" + a background worker script that executes tasks while I sleep. I'm releasing the core memory module as open source (MIT) today. I'm also finalizing a "Full Autonomy" suite (background worker + VS Code integration) that I'll release later this month. *Core Repo:* https://bit.ly/3Kw1uCk *Full Suite:* (Coming late Dec 2025) Happy to answer questions about the architecture or how I use it to maintain a "sentient" coding partner. December 4, 2025 at 02:44AM

Show HN: Rust Client Library for Gradium.ai TTS/STT API https://bit.ly/4phm08Z

Show HN: Rust Client Library for Gradium.ai TTS/STT API https://bit.ly/48gRXbw December 3, 2025 at 10:32PM