Show HN: Spectral Lab – An optics simulator in WebGL https://ift.tt/e7y2rZI

Show HN: Spectral Lab – An optics simulator in WebGL I built a drag-and-drop optics lab where you can place mirrors, lenses and prisms to play around with real-time light ray physics. It uses standard ray-tracing with proper Snell's Law refraction and chromatic dispersion. The blog post (which includes the app at the top) is the first in a series I have planned explaining this and other artful physics simulations. https://artepants.fun/posts/spectral-lab-1/ January 4, 2026 at 12:41AM

Show HN: Krowdovi – Video-based indoor navigation on a DePIN creator economy https://ift.tt/DVH645w

Show HN: Krowdovi – Video-based indoor navigation on a DePIN creator economy What is this? Krowdovi is an open-source platform that lets anyone with a smartphone record first-person navigation videos of indoor spaces - hospitals, airports, malls, universities - and earn tokens for helping others find their way around. It's built on Solana using a burn-and-mint DePIN model.The project addresses two problems: Indoor navigation is still broken. 30% of first-time hospital visitors get lost or arrive late to appointments, costing large hospitals $200K-$500K annually in staff time. Existing solutions like Google Live View require pre-captured Street View data (which barely exists indoors), and enterprise tools charge $10K-$50K/year per venue. Videographers are losing work to generative AI. Tools like Sora can generate synthetic video, but they can't walk through your hospital's actual layout or film your venue's real routes. There's an economic opportunity for creators to own location-based visual content that AI can't replicate. How it works For users: Scan a QR code at a venue entrance, watch a first-person video showing the route from where you are to your destination, with overlay graphics and multi-language support. For creators: Record navigation videos on your phone, upload to the platform, earn reputation tiers (Bronze → Diamond) based on quality and views, get paid when users burn $FIND tokens to unlock your routes. Token mechanics: Users burn $FIND tokens to mint "credits" that unlock videos. 75% of burned tokens are permanently removed from circulation, 25% goes to a remint pool that rewards creators. The smart contract on Solana handles burn-and-mint logic, reputation tracking, and distribution. Everything is MIT licensed - fork it, the code is yours. Why I built this I care deeply about making the world accessible for all. If this gets forked someone executes fantastically to make the world a more accessible place for people who have visual or mobility impairments - sweet! Technical stack Smart Contracts: Rust/Anchor on Solana (burn-and-mint engine, reputation tiers, treasury management) Backend: Node.js/Express + Prisma/PostgreSQL (venue metadata, video uploads, JWT auth) Frontend: Next.js 14 (Creator Studio, overlay tooling, wallet integration via @solana/wallet-adapter-react) Designed to be hostable on Railway/Vercel with minimal devops. The smart contract is on devnet - needs a security audit before mainnet, but you can test token burns/mints now. Current limitations What works: Smart contract deployed on devnet, full-stack app ready to deploy, video upload workflow, wallet authentication. What doesn't: No real content yet (I need to film 10-20 venues), no mainnet token launch (waiting on security audit + demand validation), quality verification is manual, no mobile app (web-only). Next steps: Deep soulful reflection on anti-gaming, moderation, ZK proofs Try it yourself! GitHub repo has setup instructions. You'll need Solana CLI, Node.js + pnpm, and a Solana wallet for devnet testing.Interested in forking for a different vertical, contributing code, testing by filming routes, or discussing token economics? I'm around to discuss in the comments. https://ift.tt/1wPMZh4 January 4, 2026 at 01:23AM

Show HN: Share Claude Code and Codex CLI Transcripts https://ift.tt/seKPjAg

Show HN: Share Claude Code and Codex CLI Transcripts I built this service + client because there's not a reasonable way to share Claude Code + Codex CLI transcripts. All data is e2e encrypted before it leaves your device, the share url contains the decryption key. Self-host on Cloudflare workers if you prefer https://ift.tt/3JI7HDz January 2, 2026 at 10:01PM

Show HN: Wip – Watch and reload any process using pluggable hooks https://ift.tt/2bsoJKz

Show HN: Wip – Watch and reload any process using pluggable hooks https://ift.tt/4m38Z5D January 2, 2026 at 09:02PM

Show HN: Gojju, a Fun Programming Language https://ift.tt/h4x3HUi

Show HN: Gojju, a Fun Programming Language Hey HN! I built Gojju, a programming language that cherry-picks my favorite features from 5 languages: - Python: List comprehensions, slicing - Ruby: #{interpolation}, postfix if, blocks - Haskell: |> pipe operator, lambdas \x -> x+1, Maybe/Either - Perl: unless/until, regex literals - JavaScript: Arrow functions =>, spread ... Example: [1, 2, 3, 4, 5] |> filter(\x -> x % 2 == 0) |> map(\x -> x * 2) |> sum Install: `pip install gojju` The name "Gojju" (ಗೊಜ್ಜು) means "essence" or "secret ingredient" in Kannada. Would love feedback on the syntax choices! https://hemanth.github.io/gojju/ January 2, 2026 at 01:39AM

Show HN: Mini Apps Builder – a no-code way to build Telegram mini apps https://ift.tt/FoeigTj

Show HN: Mini Apps Builder – a no-code way to build Telegram mini apps Hi HN I’ve been building *Mini Apps Builder*, a small no-code tool to help people create Telegram mini apps and simple web apps without writing code. The idea came from experimenting with Telegram mini apps — they’re powerful, but the tooling can be difficult unless you’re already a developer. This project aims to simplify that with templates, basic payments, and quick deployment, so people can focus more on the idea than on setup. I’d really appreciate feedback from anyone who has built Telegram bots or mini apps, or thoughts on whether this solves a real problem. Happy to answer questions or learn from your feedback. https://ift.tt/IO4U89v January 2, 2026 at 12:34AM

Show HN: Stealth and Browsers and Solvers in Rust https://ift.tt/Y8wTgbf

Show HN: Stealth and Browsers and Solvers in Rust hey guys what's up, happy new year to all of you! so basically the link above is a fork of the chromiumoxide crate but with stealth patches implemented using rebrowser as a reference. it plugs runtime.enable and common automation flags, enforces some hardware consistency through profiles and has some convenience features and it's still early but for starters it can pass most of the common detection tests i prefer writing my applications in compiled languages but recently been needing to go into browser automation more and more and always felt that the space for rust didn't have much of the variety that the node/python counterparts had, so this is my attempt to give some life to it, well to solve my needs at least, but i hope someone else finds it useful too! i needed a stealth browser in rust because my need was mostly around captcha solving, so there's a turnstile solver here too and yeah i know there's a lot of them around but having it in rust allows me to integrate it into my application so much better and avoid the mess of so many external services and yeah my use case required not only cloudflare but geetest too so i ported xkiann's python solver to rust too, with some modifications to make it deobfuscate automatically and added support for multi turn verification and user_info parameters for sites that need it both solvers have C FFI bindings for integration with other languages! https://ift.tt/3GF57DX - chromiumoxide stealth fork https://ift.tt/aO1oRPY - cloudflare solver https://ift.tt/cyHZTep - geetest solver more details on the github repo, im falling asleep so goodnight HN and happy new year again much love to you all! https://ift.tt/3GF57DX January 1, 2026 at 09:33PM