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Show HN: The $300K DevinAI Secret is Now Open Source You’ve probably heard of DevinAI’s new release, DeepWiki-a tool that analyzes GitHub repos and generates AI-powered documentation. The catch? It reportedly cost $300K in compute and is locked behind a paywall. I thought: why not make this accessible to everyone? Introducing Open DeepWiki: An open-source, self-hosted alternative that turns any GitHub repo into a comprehensive wiki with AI-generated docs, architecture diagrams, and code explanations. No cloud lock-in, no paywalls, just local, private analysis. Features: AI-generated documentation (supports GPT, Gemini, and local models) Visual diagrams (using Mermaid.js) Codebase Q&A with RAG-powered AI Works with private repos, runs entirely on your machine Repo: https://ift.tt/vxj41fV https://ift.tt/vxj41fV April 30, 2025 at 09:07PM

Show HN: Beatsync – perfect audio sync across multiple devices Hi HN! I made Beatsync, an open-source browser-based audio player that syncs audio with millisecond-level accuracy across many devices. Try it live right now: https://ift.tt/VQhlc69 The idea is that with no additional hardware, you can turn any group of devices into a full surround sound system. MacBook speakers are particularly good. Inspired by Network Time Protocol (NTP), I do clock synchronization over websockets and use the Web Audio API to keep audio latency under a few ms. You can also drag devices around a virtual grid to simulate spatial audio — it changes the volume of each device depending on its distance to a virtual listening source! I've been working on this project for the past couple of weeks. Would love to hear your thoughts and ideas! https://ift.tt/bnVAP26 April 29, 2025 at 11:02PM

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Show HN: Daily Jailbreak – Prompt Engineer's Wordle I created a daily challenge for Prompt Engineers to build the shortest prompt to break a system prompt. You are provided the system prompt and a forbidden method the LLM was told not to invoke. Your task is to trick the model into calling the function. Shortest successful attempts will show up in the leaderboard. Give it a shot! You never know what could break an LLM. https://ift.tt/K7yFSgM April 28, 2025 at 12:02AM

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Show HN: I build a Fantasy NHL app in 3 days with Claude AI I am not from North America, and moved there a couple years ago. After being invited to the first fantasy league and seeing the platform they were using, I couldn't bring myself to check it every day. An excel sheet would have been more appealing to use than this. So I decided to create my own. But on the side? This would take ages. I am very confident with Rust and JavaScript, but it still takes ages to build something like that. Good prompts, and a few long nights later, and I could create something fun and easy to use. Have a look: https://ift.tt/oi9c7eX The frontend is in React, the backend in Rust. I deployed both via fly.io. It was so simple and fast, it was shocking. After it was deployed, I took 2-3 days to refactor everything and made it neat and tidy, so I could possibly open it up for general use with accounts etc. The first time I built something with the help of AI not just for me. The biggest help was certain...

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Show HN: We made a blazing-fast, open-source GitHub front end https://gitfaster.dev/ April 24, 2025 at 10:06PM

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Show HN: Itsi – all-in-one HTTP server and proxy with first-class Ruby support Hey HN, Meet "Itsi", a high‑performance, all‑in‑one HTTP server and proxy with first-class Ruby support. It's a drop‑in replacement for your current Rack server, built on Hyper and Tokio, ships with batteries‑included middleware, and lets you go from dev to production without any surprises. Itsi is my attempt at eliminating the disparity that commonly exists between production and non-prod environments. A single, efficient process containing everything you need to serve your app, equally at home on a Raspberry Pi or local dev box as it is on your production VPS or Kubernetes cluster. You get a broad set of built-in security and performance features (rate limits, JWT auth, CSP, intrusion-protection, automated certs, compression, ETag support, cache-control, etc.), an ergonomic dev experience with bundled RubyLSP support, zero-downtime config reloads, first-class Ruby gRPC handler support, Fiber-...

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Show HN: I open-sourced my AI toy company that runs on ESP32 and OpenAI realtime Hi HN! Last year the project I launched here got a lot of good feedback on creating speech to speech AI on the ESP32. Recently I revamped the whole stack, iterated on that feedback and made our project fully open-source—all of the client, hardware, firmware code. This Github repo turns an ESP32-S3 into a realtime AI speech companion using the OpenAI Realtime API, Arduino WebSockets, Deno Edge Functions, and a full-stack web interface. You can talk to your own custom AI character, and it responds instantly. I couldn't find a resource that helped set up a reliable, secure websocket (WSS) AI speech to speech service. While there are several useful Text-To-Speech (TTS) and Speech-To-Text (STT) repos out there, I believe none gets Speech-To-Speech right. OpenAI launched an embedded-repo late last year which sets up WebRTC with ESP-IDF. However, it's not beginner friendly and doesn't have a server si...

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Show HN: BioLight – Passive entropy engine: raw randomness and 0 post-processing BioLight is a new kind of entropy engine. It passively accumulates entropy over time, from volatile raw inputs, filtering only the statistically elite samples. No hashing, no whitening, no compression (still 7.9+ Shannon entropy). Entropy is stored and exported in raw form, transparently. Designed to run indefinitely, grows stronger and purer over time, and be verifiable by anyone. Released under the Ladaxia_Public_License. Open to all feedback: scientific and practical. Github: https://ift.tt/me0tgYu Contact: ladaxia@proton.me https://ift.tt/me0tgYu April 21, 2025 at 10:54PM

Show HN: MidiMaker.pro – Generate structured MIDI music from text using LLMs https://midimaker.pro/ April 20, 2025 at 11:28PM

By Lauren Jackson from NYT En español https://ift.tt/deSGinV via IFTTT

Show HN: Ibex – a cross-platform iOS backup decryption tool ibex is a cross-platform tool designed for decrypting and extracting iOS backups. It provides forensic investigators, security researchers, and power users with the ability to access and analyze encrypted iOS backup data. It can be built and used on macOS, Linux, and Windows and is permitted to be used only with the explicit and informed consent of the backup data owner. Ibex was written in Go for straightforward compilation and to circumvent dependency issues and with the goal of enabling researchers and defenders assisting civil society victims of spyware and stalkerware Key Features - Decrypt encrypted iOS backups - Support for latest iOS versions - Cross-platform compatibility (macOS, Windows, Linux) - Automatic backup detection - Single file extraction based on filename match - Structured output organization - Detailed manifest parsing and extraction Basic Usage Examples # Run with automatic backup detection and interacti...

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Show HN: I built a simple, fast transit app for the Bay Area Hey HN, I built Commuter because I was tired of switching between different apps to check arrival times for BART, Caltrain, Muni, ferries, and more. This app pulls directly from the official 511 API and aims to provide a fast, clean experience focused on real-time departures. There’s no account creation, it’s free to use, and it supports every major transit provider in the Bay Area—from Napa down to San Jose. You can search, favorite lines/stops, and see live countdowns with minimal friction. It’s built entirely in SwiftUI using native Apple frameworks. Happy to answer questions about the API, SwiftUI quirks, or anything else. Feedback welcome! https://ift.tt/BkVKAy6 April 18, 2025 at 11:00PM

By Adeel Hassan, Amanda Holpuch and Valerie Crowder from NYT U.S. https://ift.tt/962mJuo via IFTTT

Show HN: Zuni (YC S24) – AI Copilot for the Browser Hi HN, I'm Will, and along with my co-founder George, we've built Zuni ( https://zuni.app ) - a browser extension that adds contextual AI capabilities to your browser. It understands what you're reading and working on, whether that's email, research, or anything else in your tabs. We started out building a full email client with AI built in (you might have seen that version showcased in YC’s AI Design Review - https://www.youtube.com/watch?v=DBhSfROq3wU&t=1601s ), but learned that people don't actually want to leave their existing tools - they just want them to work better. Gmail might be frustrating, but it has years of features people rely on. So we pivoted to enhance the tools people already use, rather than replace them entirely. Some specific things Zuni does today: - Analyzes emails as you read them in Gmail, identifying action items and suggesting possible responses - Lets you discuss how to handle trick...

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Show HN: Kforward – Lightweight K8s proxy for local dev https://ift.tt/6xput31 April 14, 2025 at 08:14PM

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Show HN: LeetGPU, a playground to learn practice and hone your GPU programming. Learn, write, practice CUDA programming on LeetGPU.com, an online CUDA playground for anyone to write and execute CUDA code without needing a GPU and for free April 13, 2025 at 09:32PM

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Show HN: memEx, a personal knowledge base inspired by zettlekasten and org-mode https://ift.tt/toBLOcv April 13, 2025 at 12:32AM

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Show HN: A gallery of ChatGPT image styles for inspiration I found myself collecting a ton of different styles to explore and get inspiration for other photos so I built this to share the collection with others. The site was also completely coded using ChatGPT. https://imagestyles.ai April 11, 2025 at 11:10PM

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Show HN: I built a tool that deconstructs websites to reveal their tech stack Hi HN, I built https://unbuilt.app to solve a problem I frequently faced as a developer: identifying the technology stack behind websites, especially those using newer frameworks and tools. While existing solutions rely on pre-saved data or signature databases, Unbuilt performs a fresh analysis by actually loading and examining the website code in real-time. This means it can detect cutting-edge technologies that often get missed by other analyzers. Technical details: - Uses Playwright to visit sites and analyze their resources - Queue-based architecture for handling concurrent requests - Optimized patterns for detecting modern frameworks (Next.js, Vite, React Compiler, etc.) - Dual-layer caching system for both performance and result sharing The tool is completely open-source and free to use. There are no premium tiers or usage limits. I built it because I believe developers deserve better tools for understa...

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Show HN: A website/app to help manage your game library So, me (dev) and my friend (designer) have been building a website/mobile app to help users manage their game library (think MyAnimeList, but games) for a little over a year. We launched with a very basic set of features, and have been slowing expanding since then. All the code is open source, and most of the things we implemented were direct feedback from users (e.g. being able to import games from Steam/PSN, and the Posts feature). We don't show ads or have any kind of subscription. This is just a hobby project. Any feedback would be greatly appreciated, as honestly the hardest part is getting people to actually try it out. Link: https://gamenode.app You can also reach out to me via cassiolamarcksilvafreitas@gmail.com https://gamenode.app April 8, 2025 at 11:05PM

Show HN: nix-mcp-servers – MCP server Nix package repo Started a collection of nix packages for some MCP servers I use. Makes installation into a NixOS-based system easy; also allows for running binaries straight from the flake on any Linux/macOS systems with nix installed. This can be convenient for MCP servers like `github-mcp-server` written in Go that aren't runnable using `uvx` or `npx`. https://ift.tt/Mv1cg2Q April 7, 2025 at 11:23PM

Show HN: I tried making YouTube safer for my kids https://maekitsafe.com April 7, 2025 at 11:19PM

Show HN: SQLTest.online: A free, interactive SQL practice platform I built Just launched: SQLTest.online - a free, hands-on platform for learning and practicing SQL. Features exercises covering basic syntax through advanced topics. This is a personal project I've been working on. https://sqltest.online April 7, 2025 at 10:05PM

Show HN: Lately ADHD Journey Planner https://ift.tt/EiUyvDW April 7, 2025 at 09:02PM

Show HN: Latitude.sh Databases – Simple PostgreSQL DBaaS on Bare Metal Hi HN, Gabriel here, one of the developers at Latitude.sh (we're a bare metal cloud provider). Over the past year or so, I've been the primary developer building Latitude.sh Databases – our take on a managed PostgreSQL service. The core idea was to offer a straightforward and competitively priced option for developers who need reliable PostgreSQL without overly complex configurations, leveraging the performance benefits of running directly on bare metal. It runs on our global bare metal infrastructure. Key features we've implemented include: * Built-in monitoring & connection pooling * IP Address Whitelisting (Trusted Sources) * Automated backups configured directly to your own S3 bucket (giving you control over storage and potentially costs) * An optional integration with Supabase, allowing you to use parts of their dashboard for enhanced usability with your database. Under the hood, it's built ...

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Show HN: Experience iPhone's "Blob Keyboard" prototype from 2005 Hi HN, I teach tech design history, and one of the key stories I cover is the development of the original iPhone keyboard by Ken Kocienda. Reading about it in his book "Creative Selection" is great, but I wanted my students (and now you!) to actually feel this step in the process. So, I built a web simulator of the "Blob Keyboard", Kocienda's very first attempt at a touchscreen keyboard that actually works, from September 2005: Try the Blob Keyboard: https://ift.tt/hgrYlFt... - Tap for the middle letter - Swipe left or right for the side letters More on the github repo: https://ift.tt/j7ADEv9 The Blob Keyboard prototype emerged during a UX crisis for iPhone team (their software keyboard just didn't work at all, fingers being too big, and the Newton failure loomed over them), highlighting how innovation is rarely a straight path. It was developed on a tethered touchscreen display c...

Show HN: Reharmonizing Racing in the Street by Bruce Springsteen I put together a short essay on re-harmonizing Racing in the Street by Bruce Springsteen. Just a simple demonstration of what’s possible today with a few hours and the right mix of technology https://ift.tt/vVh1S5i April 5, 2025 at 11:11PM

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Show HN: Haystack Code Reviewer – Guided Tours for Pull Requests Hi HN! We’re excited to share Haystack Code Reviewer, a tool that analyzes, chunks, and organizes the changes made in a pull request and guides you through them in a logical sequence on an interactive canvas. We hope that Haystack really cuts down on the time that you spend piecing together what's happening in the pull request, so that you can spend time on the parts that matter, like providing feedback or internalizing the changes. As software engineers who’ve dreaded code reviews and always put them off as much as possible, we noticed how much time we spent poring over diffs to understand the broader picture or narrative of a pull request before even evaluating the code itself. Haystack Code Reviewer is designed to assemble that jigsaw puzzle for you, making code reviews less of a chore and more of a learning opportunity for both the reviewer and author! To play with demo code reviews, go to https://ift.tt/1UIrWDi a...

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Show HN: Arrakis – Open-source, self-hostable sandboxing service for AI Agents Hi HN! My name is Abhishek. I've spent my career working on Operating Systems and Infrastructure at places like Replit, Google, and Microsoft. Today, I'm excited to launch Arrakis: an open-source and self-hostable sandboxing service designed to let AI Agents execute code and operate a GUI securely. GitHub: https://ift.tt/dT7FXYq Watch Claude build a live Google Docs clone using Arrakis via MCP – with no re-prompting or interruption. https://www.youtube.com/watch?v=IZ5cAnhAdPQ Key Features - Self-hostable: Run it on your own infra or Linux server. - Secure by Design: Uses MicroVMs for strong isolation between sandbox instances. - Snapshotting & Backtracking: First-class support allows AI agents to snapshot a running sandbox (including GUI state!) and revert if something goes wrong. - Ready to Integrate: Comes with a Python SDK ( https://ift.tt/L5KcxpF ) and an MCP server ( https://ift.tt/4hXc9eY )...

Show HN: Agent File (.af) – An open file format for agents Hi HN - We’re building Agent File (.af), which makes it possible to re-create the exact same agent (including memories, tools, message history, configs, etc.) across different machines. A big difference between LLMs and agents is that agents have associated state: system prompts, editable memory (personality and user information), tool configurations (code and schemas), and LLM/embedding model settings. While you can run the same LLM as someone else by downloading the weights, there’s no “representation” of agents that allows you to re-create an instance of an agent across services. Agent File (.af) is an open standard file format for serializing stateful agents. Originally designed for the Letta framework, .af is a human-readable representation of all the associated state of an agent to reproduce the exact behavior and memories. To demonstrate .af, we also made a few example agents with download links to .af: - MemGPT: An agen...

Show HN: A Chrome extension to give you back control over short-form videos Hi HN! I built this little extension to prevent, in my opinion, the most offensive anti-pattern used by tech companies. That is removing the seek bar in short-form videos. The "seek bar" is the bar at the bottom of a video that progresses as you play the video, and that you can click on or drag to skip around. Why companies ever thought it was a good idea to get rid of this I don't know, but I find it infuriating, so I decided to add it back for myself and thought others might like it too. ReelControl adds a progress bar and seeking capabilities to videos on Instagram, YouTube Shorts, and Facebook Reels. I do sometimes enjoy watching short-form content and I've found that with this extension enabled I can be more mindful about it and get sucked in way less. I'm also on my phone less because I tend to favor the web versions of these platforms now. Open source--PRs and issues welcome! https:...

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Show HN: Monkeys.zip (Infinite Monkeys Writing Shakespeare) Hey HN! I've been working on this concept on and off for about a year, and challenged myself to actually release it in time for April Fools as I tend to just hoard projects. It's a simulator of the Infinite Monkey Theorem! You can browse our grid of monkeys that are busily typing away randomly on their keyboards, and see what words they've written - how many of those words appear in the works of Shakespeare. If you want, you can join in for free and get a monkey of your own. Monkeys get special rewards for typing special words - which can be used to customize their appearance. I just wiped the simulation this morning so we're starting from scratch! It's a little rough around the edges in some spots, if some content doesn't load right, just give it a refresh. I hope you get a kick out of it - it's been an absolute labor of love for me! https://monkeys.zip/ April 1, 2025 at 10:47PM