🛠️ All DevTools

[Other] Show HN: An Open Source XR(AR/VR) Operating System We&#x27;re two college students building an XR(AR&#x2F;VR) native Operating System with a custom kernel. We&#x27;re also Open Source so feel free to check our GitHub Repository- <a href="https:&#x2F;&#x2F;github.com&#x2F;manaskamal&#x2F;XenevaOS" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;manaskamal&#x2F;XenevaOS</a> .<p>The journey hasn&#x27;t exactly been easy, we&#x27;ve been criticized by a lot saying that whatever we&#x27;re doing is impractical and that we&#x27;re too ambitious. Regardless, we&#x27;ve been committed to reach our goal.<p>Here to answer all questions and doubts. Answering one question beforehand because we know someone is going to ask it -<p>Q: Why use your own kernel&#x2F; Why don&#x27;t you use Linux&#x2F; Why are you trying to reinvent the wheel?<p>A: Using our own kernel helps us get rid of the baggage of legacy codes, bring the most optimal performance on our target hardware (XR&#x2F;AR&#x2F;VR) and achieve more efficiency than what we would&#x27;ve achieved on an existing kernel.<p>We&#x27;re not trying to reinvent the wheel, but just building Formula One racing tyres for it.

[Other] Show HN: I'm a dermatologist and I vibe coded a skin cancer learning app Coded using Gemini Pro 2.5 (free version) in about 2-3 hours.<p>Single file including all html&#x2F;js&#x2F;css, Vanilla JS, no backend, scores persisted with localStorage.<p>Deployed using ubuntu&#x2F;apache2&#x2F;python&#x2F;flask on a £5 Digital Ocean server (but could have been hosted on a static hosting provider as it&#x27;s just a single page with no backend).<p>Images &#x2F; metadata stored in an AWS S3 bucket.

[Other] Things you can do with a debugger but not with print debugging

[Other] A collection of reusable Next.js/React components. Namer UI is a collection of reusable Next.js/React components made to empower developers to quickly build beautiful UIs. Spend less time designing UI from the ground up and more time building the features that matter to your users.

[Other] Stop accidentally closing your most important Tabs for Edge DefendTab is the smart guard for your tabs. It prevents you from accidentally closing important pages, protecting your work and sanity. It's an essential tool for students, developers, and anyone who wants to ensure their crucial tabs are safe.

[Other] Instant UI blocks for React & Next.js developers. Rapid-UI helps you build beautiful React/Next.js apps faster. Instantly generate high-quality Tailwind CSS components or copy production-ready code directly from our growing block library.

[Other] Get more google reviews with smart qr code automation ReviewBoost helps local businesses generate more Google reviews using smart QR code funnels, auto-generated reviews, and intelligent filtering. Get more 5-star reviews in 30 days.

[API/SDK] Debug test & optimize your code instantly – all in one API🚀 Test, debug & optimize code instantly – all in one simple API for sideprojects and small dev tasks. 🚀

[API/SDK] Show HN: CrabCamera – Cross-platform camera plugin for Tauri desktop apps After building several Tauri desktop apps, I kept hitting the same wall: there&#x27;s no reliable way to access cameras across Windows, macOS, and Linux. Every project meant reinventing camera integration, dealing with platform-specific APIs, and debugging permission issues.<p><pre><code> So I built CrabCamera – a Tauri plugin that handles all the camera complexity for you. What it does: - One API, three platforms: Same Rust code works on Windows (DirectShow), macOS (AVFoundation), and Linux (V4L2) - Permission handling: Automatically requests camera permissions on each platform - Format conversion: Takes care of the messy bits between platform formats and what your app needs - Error handling: Proper Rust error types instead of mysterious crashes - Hot-plugging: Detects when cameras are connected&#x2F;disconnected The problem it solves: Before CrabCamera, adding camera support to a Tauri app meant: 1. Writing separate native code for each platform 2. Managing three different permission systems 3. Handling format conversions manually 4. Debugging platform-specific edge cases 5. Maintaining it all as OS APIs change Now it&#x27;s just: use crabcamera::Camera; let camera = Camera::new()?; let frame = camera.capture_frame().await?; Why I built it: I was working on a plant monitoring app (botanica) that needed reliable camera access for time-lapse photography. Existing solutions were either abandoned, platform-specific, or required complex native bindings. The Tauri ecosystem is growing fast, but camera support was this obvious gap. Every desktop app eventually needs camera access – video calls, document scanning, AR features, security monitoring. Technical highlights: - Uses nokhwa for the heavy lifting but wraps it in Tauri-friendly APIs - Proper async&#x2F;await support throughout - Memory-efficient streaming for video capture - Built-in image processing pipeline - Extensible plugin architecture What&#x27;s next: - WebRTC integration for video calls - Built-in barcode&#x2F;QR code scanning - Face detection hooks - Performance optimizations for 4K streams The crate is MIT licensed and available on crates.io. I&#x27;d love feedback from other Tauri developers who&#x27;ve wrestled with camera integration. Links: - Crates.io: https:&#x2F;&#x2F;crates.io&#x2F;crates&#x2F;crabcamera - GitHub: https:&#x2F;&#x2F;github.com&#x2F;Michael-A-Kuykendall&#x2F;crabcamera - Documentation: https:&#x2F;&#x2F;docs.rs&#x2F;crabcamera</code></pre>

[Other] Longhorn – A Kubernetes-Native Filesystem

[Other] Show HN: Lightweight tool for managing Linux virtual machines hey guys. the other day i was migrating hosting providers and i just needed something not too heavy and convenient to spin up my backups for awhile and realised there is almost nothing out there. kimchi hasn&#x27;t been updated for years and cockpit is heavy. so here&#x27;s something i came up with in a couple hours because of a sudden urge, nothing fancy just basic creation with cloud init, lifecycle management and image&#x2F;storage, but it&#x27;s modern-ish and it compiles to a 8.4mb binary inclusive of the embedded web UI, CLI and API, and only dep is libvirt.

[CLI Tool] Show HN: Greppers – fast CLI cheat sheet with instant copy and shareable search I kept re-Googling the same flags, so I built a tiny, fast directory of copy-ready CLI commands. It’s static (vanilla JS), instant search, keyboard nav (↑&#x2F;↓ + Enter), favorites (localStorage), and linkable queries.<p>Examples: • grep errors → <a href="https:&#x2F;&#x2F;www.greppers.com&#x2F;?q=grep%20error%20logs" rel="nofollow">https:&#x2F;&#x2F;www.greppers.com&#x2F;?q=grep%20error%20logs</a> • list open ports (macOS) → <a href="https:&#x2F;&#x2F;www.greppers.com&#x2F;?q=list%20open%20ports" rel="nofollow">https:&#x2F;&#x2F;www.greppers.com&#x2F;?q=list%20open%20ports</a> • show git branch graph → <a href="https:&#x2F;&#x2F;www.greppers.com&#x2F;?q=git%20graph" rel="nofollow">https:&#x2F;&#x2F;www.greppers.com&#x2F;?q=git%20graph</a> • tail with colors → <a href="https:&#x2F;&#x2F;www.greppers.com&#x2F;?q=tail%20colors" rel="nofollow">https:&#x2F;&#x2F;www.greppers.com&#x2F;?q=tail%20colors</a><p>Suggest a missing command: <a href="https:&#x2F;&#x2F;www.greppers.com&#x2F;submit.html" rel="nofollow">https:&#x2F;&#x2F;www.greppers.com&#x2F;submit.html</a><p>I’m looking for gaps and better real-world examples. Feedback welcome.

[Other] Show HN: Find the cheapest protein per gram across 3000 powders I tracked protein powder prices in a spreadsheet for years and found that identical protein content can have wild price differences.<p>I built PricePerProtein to automate it. It pulls real-time Amazon data (Keepa API) and uses Gemini 2.5 Flash to extract nutrition facts from product images&#x2F;descriptions. Calculates actual protein per dollar, not just package price.<p>Technical: FastAPI + Celery backend, Next.js frontend with virtual scrolling to handle 3000+ products. Deployed on a VPS (migrated from GCP - much simpler). The AI handles everything from blurry nutrition labels to understanding flavor categories.<p>No signup, no ads, no affiliate links. Updates hourly.

[Other] Stop writing CLI validation. Parse it right the first time

[API/SDK] Using Claude Code SDK to reduce E2E test time

[Other] Show HN: Evalyze – AI investor matching from your pitch deck (feedback welcome) I used to work in VC and watched good teams lose months chasing the wrong investors. I’m building Evalyze to make the unglamorous parts faster and more precise.<p>After sign-up (email only, no card) you can:<p>- upload a deck or paste your site - get a ranked list of relevant VCs&#x2F;angels with a short “why” for each<p>What’s different: instead of dumping a big list, we try to explain why an investor fits based on stage, sector, check size, and portfolio patterns. It’s far from perfect and we want blunt feedback before opening wider.<p>Limits to know:<p>- newer funds and emerging managers can be underrepresented - geo nuances are still rough - matching can over-weight buzzwords if the deck is vague<p>I’d love critique on the ranking logic, signals you’d add&#x2F;remove, and any privacy concerns. If you don’t want to upload a deck, there’s a sample you can use to see the flow.<p>I’ll be here replying and shipping fixes as comments come in.

[Other] Distributed query engine providing simple and reliable data processing for any modality and scale

[Other] FHEVM, a full-stack framework for integrating Fully Homomorphic Encryption (FHE) with blockchain applications

[Build/Deploy] Deploy your web app to a VPS in minutes QuickDeploy deploys your web app to your own Ubuntu VPS with a single command. It auto-detects frameworks like Next.js, builds an optimized Docker image, and sets up a reverse proxy for https and custom domains. Built for devs that need their app live quick.

[Monitoring/Observability] AI error tracker that tells you why bugs happen and fix it. Tired of spending hours debugging? BugbyBug uses AI to instantly identify root causes of errors and crashes. Get actionable insights, not just logs. From stack traces to user impact analysis, we tell you exactly what broke and how to fix it.