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Show HN: We built a tool to dub any video in the original voice in 40 languages We kept seeing the same problem: creators make great content but the moment they dub it into another language, everything falls apart. Robotic voice. Music gone. Meaning lost. Lips not matching. So we built Vaani. Whatever language you create in, wherever you are in the world, your content can reach a global audience. We clone your voice, match your gestures, preserve your music, and optionally sync your lips to the new language. 10+ Indian languages, 20+ global languages, all in minutes. We built it for 2 reasons:<p>So creators never have to sound like a robot in another language again So the same video you already made can reach a global audience without filming twice<p>Would love your feedback. app.vaani.media

Show HN: PWNC – A dependency-free web platform I've been building for 25 years

Show HN: Lathe – Use LLMs to learn a new domain, not skip past it Hey HN!<p>Lathe is an experiment in using LLMs to teach me something new, instead of doing the work for me. It generates a hands-on, source-backed tutorial for any technical topic you want to learn. Then you work through it yourself by reading and typing the code by hand (<i>gasp</i>) in a local UI built for exactly that.<p>It&#x27;s a Go CLI plus LLM agent skills (Claude Code &#x2F; Cursor &#x2F; Codex). You prompt something like &quot;&#x2F;lathe build a 3D slicer in Erlang&quot;, run `lathe serve` to spin up a local webapp, and read it in your browser. Every tutorial comes with the things that have made self-learning a pleasant experience for me in the past:<p>- table of contents that follows along as you scroll - side-notes that nudge you to think - exercises for the reader - sources backing up the content that you can use to take you deeper<p>To help make up for the lack of human brainpower behind the tutorial, you can also ask questions about the content, have another LLM verify the tutorial actually compiles and runs, or extend it with another part (no more &quot;Part 4 of 6&quot; that hasn&#x27;t seen an update since 2021).<p>I didn&#x27;t build lathe to replace human-written tutorials. I built lathe because I _love_ human-written tutorials, but wanted to learn technical domains where no good human-written tutorial exists yet (building a 3D slicer from scratch, making embedded Zig approachable, etc). There&#x27;s a longer story in the README about how I got started with programming through PSP homebrew tutorials, and why losing that to LLMs bugged me enough to build this.<p>I&#x27;m not here to sell you anything (there&#x27;s nothing close to a VC-backed startup here :D). It&#x27;s an LLM, and its output is usually good but not perfect by any means. So far, my experience is that because you&#x27;re the one typing and actually engaged, you catch the weird stuff (and I&#x27;m finding that pushing back on it is its own kind of learning). And yes, it&#x27;s vibecoded, because it&#x27;s low scope, low risk, and scratching a personal itch. I run it on Claude Code + macOS personally, other setups should work but I haven&#x27;t been able to verify them yet.<p>If you can find resources to learn something that was written by a human, read that first. But Lathe is here to fill in the gaps when that isn&#x27;t the case, and I hope it serves as an example where LLMs can help us think better, rather than less.<p>Repo: <a href="https:&#x2F;&#x2F;github.com&#x2F;devenjarvis&#x2F;lathe" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;devenjarvis&#x2F;lathe</a><p>Would love your feedback if you decide to check it out!

Scientists ejected from diabetes conference for distributing journal reprints

H2JVM – A Haskell Library for Writing JVM Bytecode

Automated QA and Testing with AI

Efficient and Training-Free Single-Image Diffusion Models

The 29th International Obfuscated C Code Contest (IOCCC) 2025 Winners

The circus freaks of open source

DoD Officially Drops 180 Faiths from Military's Recognized Religion List

Show HN: A beautiful and local-first PDF reader for studying dense things Recently, I found myself having to read the book &quot;C++ primer&quot; and I just couldn&#x27;t do it. Maybe my attention span is too little now with Claude and Codex, maybe I&#x27;m lazy... but I just couldn&#x27;t get myself to focus.<p>While reading, I needed something to do. I wanted to talk to the text, I wanted to leave notes, I wanted to use to use my keyboard to quickly flip through pages.<p>The only good available option on a Mac was &quot;Preview&quot; and it was ok, but definitely not there. So I built Quincy primarily for myself.<p>With it you can - &quot;Talk&quot; to the page you&#x27;re reading, create a quiz about the page, and get a good summary - &quot;Read&quot; the page out-loud. Have your Mac read to you while you follow along. This helps with comprehension. - Copy text (to paste into an LLM), leave notes, bookmarks, etc.... - Anything else you&#x27;d want with a nice PDF reader<p>It&#x27;s fully local. No cloud-sync (yet). All LLM calls are based on your keys. And TBH, you don&#x27;t even need to use the AI features for this to be useful.<p>Try it out. Let me know what you guys think. This has been a quick project, so very rough around the edges. I plan on keeping it going (still haven&#x27;t finished my book), and potentially open-sourcing down the line.

Sem: New primitive for code understanding – not LSPs, but entities on top of Git

Ntsc-rs – open-source video emulation of analog TV and VHS artifacts

The beauty and simplicity of the good old C-style void* in C++

Show HN: Resonate – Low-latency, high-resolution spectral analysis Last April I shared about my Resonate project here (<a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=43694157">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=43694157</a>)<p>A lot has happened since: the work I presented in much more detail at last June&#x27;s International Computer Music Conference (ICMC) got best paper award. I also gave a talk at the Audio Developer Conference in Bristol last November, the video is on YouTube).<p>This year&#x27;s work, which I recently presented at this year&#x27;s ICMC, starts with known techniques from the phase vocoder literature to build self-tuning filter banks that extract very efficiently the frequency components that are actually present in the input signal. Overview on the project website, more details in the papers, including applications to super-resolution spectrograms and re-synthesis experiments.<p>As many people have pointed out, none of the techniques I have used are new (some of them even have different names across different fields), but I haven&#x27;t seen them applied together in this way, and to me the results are incredibly satisfying and sometimes look magical. See for example this demo: <a href="https:&#x2F;&#x2F;youtu.be&#x2F;LasdoIJJkw8" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;LasdoIJJkw8</a><p>Of course the best way to experience in person is through the free demo app: <a href="https:&#x2F;&#x2F;alexandrefrancois.org&#x2F;Oscillators" rel="nofollow">https:&#x2F;&#x2F;alexandrefrancois.org&#x2F;Oscillators</a><p>Looking forward to feedback from the community!

AI-powered job search system built on Claude Code. 14 skill modes, Go dashboard, PDF generation, batch processing.

The official NGINX Open Source repository.

Agentic AI Infrastructure for magnifying HUMAN capabilities.

Show HN: Ccgs – Collaborative Claude Code sessions, stored in Git branches My team uses Claude Code daily, and the sessions have become some of the most useful artifacts we produce. But they&#x27;re trapped in ~&#x2F;.claude&#x2F;projects&#x2F; on whichever laptop they happened on. There&#x27;s no good way to hand a colleague &quot;the session where I untangled the migration&quot; so they can claude --resume it and keep going from where I left off. Enter ccgs: Share Claude Code sessions through an orphan branch (@ccgs&#x2F;&lt;name&gt;) in your existing repo&#x27;s remote<p>- Session files carry the author&#x27;s absolute paths. On pull, ccgs rewrites the working dir back to your path so resume actually works — surgically editing only the structural cwd field, not a blind find-and-replace that would happily corrupt the transcript.<p>- Everything goes through git plumbing (hash-object&#x2F;commit-tree&#x2F;update-ref) against a throwaway index. It never touches your working tree, index, or current branch, and it&#x27;s fine with a dirty tree. It will not git checkout something behind your back.<p>To try it without installing: `npx claude-git-sessions`. This also incidentally allows you to move a directory and carry the claude code transcripts with it (just push first, then move the directory, then pull)<p>IMPORTANT CAVEAT: Unless you have a very good security hygiene, your Claude Code sessions are likely full of sensitive information such as environment secrets. Use with caution and avoid using on public repositories. Branches used by ccgs are prefixed by `@ccgs&#x2F;` so you can easily filter them out.<p><i>This project was written by and with Claude Code. This Show HN was not.</i><p>(Reposted with URL fixed)

Running Python code in a sandbox with MicroPython and WASM