value: kalynyak

value:
After finishing my app's first version, I started working on marketing/promotion/sales and realized: AI coders are amazing with code, but terrible with content.
I needed to create screencasts, write docs, handle customer calls - but my AI editor could only help with the coding parts, not the content creation and promotion work that comes after.
So I built a macOS companion that lets AI coders work with content, not just code:
Records screencasts and calls with auto-transcription
Captures voice notes and screenshots
Connects to 100+ tools (Linear, Slack, Notion) without API setup
Everything flows into your AI editor as rich context
Example: Record a product demo → tell AI "create marketing copy from this" → done.
Open source + cloud versions planned. Currently looking for interested users to get feedback and do customer development.
Waitlist: https://bolide.ai

value: Show HN: macOS app to give Cursor (and others) more context and tools

author: kalynyak


value:
I built LLMuxer because I kept defaulting to GPT-4o for everything, even simple tasks where a smaller, cheaper model would have done just fine.
It runs your prompts or dataset (currently for classification tasks) across multiple models, compares performance vs. cost, and recommends the best value so you’re not wasting tokens or budget.
Would love feedback and ideas for features you’d want before using it in your own workflow!

value: Show HN: LLMuxer – Find the cheapest LLM that keeps your accuracy


value: I made a demo for a media platform where people can ask any question so long as they can prove their position. Hopefully, creates a more honest version of media not subjected to institutional gatekeeping of narratives or facts.

value: Show HN: Betting Markets and Hacker News Type Evidence Section to Find the Truth


value:
Try it out for free!
Generate dank AI memes in SECONDS:
https://www.memes.business/share/04b77771-28c7-44da-9033-118...
Built this because AI doesn't have to suck at actual humor.

value: Show HN: memes.business – AI memes that are actually funny


value: jasongreige

value:
Hi HN,
I’m a solo indie developer, and I just launched Tilesplash — a mobile puzzle game I’ve been working on for the past few months.
Instead of just matching tiles, you merge numbers to trigger satisfying cascades. Planning ahead creates chain reactions and higher scores.
Two main modes:
- Classic: endless score chase for quick sessions
- Adventure: level-based puzzles with limited moves/objectives
What makes it different:
- Unique cascade + merge mechanics (not just match-3 or 2048)
- Minimal, colorful design with smooth animations
- Optional power-up via rewarded ad — no paywalls, no forced ads
- Privacy-compliant with App Tracking Transparency on iOS
Links:
iOS: https://apps.apple.com/ca/app/tilesplash/id6747778208?l=fr-C...
Would love feedback from the HN community — especially on first impressions, onboarding, and ideas for improving retention.

value: Show HN: Tilesplash – Merge and Cascade Puzzle Game with Two Modes

author: jasongreige


value: maximaximal

value:
I've been hacking on this project for quite a while and now finally released it on PyPI for Linux, MacOS and Windows! The release includes a binary (miniexact) that solves exact cover problems in your terminal, and a similarly named Python module you can use to encode problems. Everything is implemented in C without any other dependencies, so this compiles cleanly on every system. You can select the algorithm you want to use in the console or use the Web-UI.
I haven't found a faster solver yet in my benchmarks, so I would be happy to see other implementations! The big caveat is that it still purely relies on the Dancing Links technique and not on the newer Dancing Cells from Christine Solnon and the TAOCP Fascicle 7. While my implementation has a different memory architecture than the standard one (arrays of fields instead of an array of node structs each containing the same fields), this could be an interesting addition to the provided algorithms. There is nothing preventing this addition but the involved implementation effort.
Would be nice to read some thoughts about Exact-Cover and the problems you solve with it! Maybe this project encourages somebody to look at this nice paradigm again :)

value: Show HN: Miniexact – An efficient DLX Exact-Cover solver with a Python interface

author: maximaximal


value: yevbar

value:
Hi HN!
I was disappointed when the ChatGPT Agent announcement came with the note that there'd be limited usages available for something that's architecturally simple:
> Pro users have 400 messages per month, while other paid users get 40 messages monthly, with additional usage available via flexible credit-based options.
So assembled this with Cloudflare's recent Containers API. Here's a link to the tweet we posted launching it:
https://x.com/getlsd/status/1956441045119672710
Feel free to fork or star and make funny things happen :)

value: Show HN: Run Your Own ChatGPT Agent on Cloudflare Containers

author: yevbar


value:
Hello HN!
Between academics and everything else on my plate, I still find myself watching way too many YouTube videos. So I built `youtubegist` - just add `gist` after `youtube` in any video URL to get an instant summary.
Before: https://youtube.com/watch?v=<...>
After: https://youtubegist.com/watch?v=<...>
I know there are other YouTube summarization tools, but they're either cluttered, paywalled, or don't format summaries the way I need them. So I made my own that's free, open source, and dead simple.
One cool thing, if you install it as a PWA (on Android using Google Chrome), you can share YouTube URLs into it from the YouTube app, and it should summarize the video for you!
Please leave your feedback if you tried it out! Thank you!

value: Show HN: Add "gist" to any YouTube URL to get instant video summaries


value:
Hey HN,
I built this because services like Intercom, Gleap, Freshdesk were burning a hole in my, and other peoples wallets.
So I stripped it down to the bare minimum:
Knowledge Base
Lightweight CRM
Easy embeddable widget
No AI hype, no confusing dashboards, no “contact sales” buttons.
Takes 5 minutes to install.
If you’re a small startup, solo founder, or just tired of paying enterprise prices for basic support, you might like this.
Thanks
Con

value: Show HN: I built my own low-cost Intercom replacement for Customer Support


value:
Most memory solutions just do RAG search on chat logs. That's not real memory. We want a real memory that could understand a user and grow with them, not just search their past chats.
Memobase works like ChatGPT  memory, specially designed for chatbot agents. It's personalized and scales to millions. Retrieval latency is under 80ms. ( 85% score on LOCOMO Temporal Benchmark https://github.com/memodb-io/memobase/tree/main/docs/experim...
- Profile + Timeline schema — not complex embedding.
- Context API — full system prompts for evolving & personalized LLM responses.
- Built with FastAPI, Postgres, Redis — ready for production.
Check it out on GitHub: https://github.com/memodb-io/memobase

value: Show HN: An Open-Source Structured Memory Back End (Like ChatGPT Memory)


value: ekduman

value: Show HN: Orca – AI Game Engine

author: ekduman

title: Show HN: Orca – AI Game Engine


value: scbaltay

value: Show HN: Open-source animated glow component for React Native with live builder

author: scbaltay


value: amusely

value:
Hi HN,
I'm Neha and I built April to manage my email & calendar while driving.
April is a voice assistant that helps manage my emails & calendar schedule while I drive or walk. I can just say:
- “Reply to Sasha” and dictate the message - April sends the email right away.
- “Archive these emails” “file this to the Clients folder,” or “delete all promos” - all hands-free.
- Schedule or reschedule meetings without touching my screen.
Now, in 20 minutes of commute, I’m at Inbox Zero and my calendar is set for the day. I walk into work already prepared for the day.
This one change freed up a full hour every morning.
April buys you back time if you're buried under email and have a long commute to work.
I'd like your feedback on
- your most painful email & calendar workflows
- what other integrations you'd like to have a voice interface for
- what would make April useful for you

value: Show HN: April (YC S25) – Hit Inbox Zero with Just Your Voice While You Drive

author: amusely


value: zuhaib-rasheed

value:
Hey HN, I am Zuhaib from Magicnode (https://magicnode.ai), no code AI micro apps builder platform visually with workflows.
Here is the demo video: https://www.youtube.com/watch?v=pIecK6uKZjU&t=4s&ab_channel=...
With Magicnode, you can:
Build AI apps visually — drag, drop, and connect “nodes” for prompts, logic, APIs, and UI elements.
Publish instantly — your app becomes a shareable web link with a clean interface, no deployment headaches.
Monetize & share — there’s an “App Store” where you can publish your AI tools for others to use, free or paid.
Go beyond chatbots — workflows can handle structured inputs, multi-step logic, file processing, and integrations.
Example: In under 10 minutes, a non-technical marketer made a “viral TikTok caption generator” that uses OpenAI + a trending-hashtag API, and shared it with their whole team.
We’re hoping Magicnode lowers the barrier for creators, small businesses, and indie hackers who want to build AI products fast — without hiring developers or wrangling cloud deployments.
Would love your feedback on:
What use cases you’d want to see
Gaps we should close to make it useful for power users
Features that would make you actually switch from code to visual building
Note: We applied to YC F25 but didn’t get in as of now — still excited to share what we’ve built and get feedback.
We’re live now — try it here: magicnode.ai

value: Show HN: Magicnode (Applied to YC F25) – Canva for AI Apps

author: zuhaib-rasheed


value: franze

value: Show HN: 100% Claude Coded Game: Floktoid

author: franze


value:
I built this over the last 6 months from the ground up. Backend is TypeScript with WebSockets (uWebSockets.js). Frontend is plain JS and uses a mix of WebGL + the DOM.
RTT is <100ms for US west coast, and around 150-200ms for east coast. The world sim is on a single authoritative server with basic 2D physics. Clients talk to a fleet of horizontally scalable replicas. Replicas are dumb aggregators and never simulate ahead of the primary. Each replica has the full world sim state, and clients connect based on real-world location rather than location in the sim world. There are no handoffs when someone moves through the world. Each replica can handle around 1k clients before the experience starts to degrade.
Client simulates ahead of the primary to minimize perceived latency. I found that using two simulations and blending them together created the best experience. Desync does still happen, but the game's design softens the impact. For example, the "dueling" mechanic works based on accumulated collision time, so desync causes fewer noticeable changes in outcomes.
Duels (also called minigames) are hosted on a separate fleet of machines. The minigame UI is shown over the world so that you never feel like you've left despite the minigame being an isolated instance.
While I haven’t run a full-scale test with 100k real users, individual systems have been stressed beyond required load.
The core simulation can handle 100k bots at a fairly smooth 50hz. These timings are in ms and are from an EC2 c7a.4xlarge box:
- Wall (mean: 19.999; sd: 0.575; max: 22.919)
- Sim (mean: 3.81, sd: 0.387, max: 7.428)
- Emit (mean: 1.028; sd: 0.368; max: 4.174)
These timings do not change much when I add more replicas because replica connections are handled uniformly and off-thread.

value: Show HN: A real-time browser game built for 100k people


value: Brysonbw

value:
Here’s a library for creating toast notifications in Lit Web Components.
Feel free to contribute, leave a star on the repository, or share your feedback here.
If unfamiliar with Lit, here's link to docs: https://lit.dev/

value: Show HN: Lit-Toaster – Notifications for Lit Web Components

author: Brysonbw


value: Show HN: Free API to block temporary emails


value: IXCoach

value:
What This Does For You
Agentic Sync is a prototype-demo task management system specifically designed for developers and AI agents to collaborate effectively. This is not just another todo app - it's a sophisticated Getting Things Done (GTD) implementation with built-in AI agent integration.
Core Value Proposition
For Developers:
Instant, social media-like UI with optimistic updates that make task management feel effortless
Complete local deployment - compiles to a native desktop app via Tauri with your own database
AI agent direct communication - code agents can create, update, and complete tasks programmatically
Production GTD workflow - handles complex task states, dependencies, and approval processes
Zero external dependencies - runs entirely on your infrastructure
For AI Agents:
Direct task creation - agents can log tasks without human intervention using the included client
Status management - agents mark tasks as 'for-review' when complete, requiring human approval
Rich task context - support for requirements, technical plans, verification steps, and dependencies
Project organization - automatic categorization and initiative linking
 Live Demo
Enhancing AI Agent Communication with a User-Friendly Interface
 Watch the demo on Loom
https://www.loom.com/share/121fb242c0ba4c0c856abb31733342bb

value: Show HN: Agentic Sync – AI-Native Task Management Platform

author: IXCoach


value: brucekaushik

value:
I have been tinkering with an idea I call CCCP — Context-Aware Composable Compression Protocol.
Most compression formats treat the process as a black box: you feed bytes in, you get bytes out.
I wanted something programmable and composable, where the format itself can be adapted to different domains — and even customized by different vendors.
So far, CCCP has a few interesting properties:
Composable: Multiple LUTs (look-up tables) and encoding phases can be combined.
Context-aware: Decoding is guided by explicit metadata, not just raw byte streams.
Round-trippable IR: The intermediate representation can reconstruct the original logic before final binary compression.
Programmable: Vendors can plug in their own LUTs, encoders, and decoders.
It is still very early and experimental. Would love to hear if anyone has seen similar approaches, or where this might break down in real-world usage.
Repos:
https://github.com/brucekaushik/cccp
https://github.com/brucekaushik/cccp-python-poc

value: Show HN: CCCP – a programmable, context-aware compression protocol (early stage)

author: brucekaushik


value:
## What's it for?
- *Daily performance monitoring*: Test your hardware anytime, anywhere, right from your browser.
- *Buying a new device*: Use the online hardware test to make sure your new PC, iPad, or phone performs as expected and has no potential factory defects.
- *Diagnosing an old device*: Perform a hardware check to pinpoint performance bottlenecks and potential issues, providing data to support repairs or upgrades.
## Website
Website: https://volumeshader.org/
## Detailed Features
- *GPU Test*: Three different levels of online GPU testing.
- *Screen Test*: Check for dead pixels, backlight bleed, contrast, and other key display metrics.
- *FPS Test*: An online frame rate test tool to evaluate device performance.
- *Network Test*: Connection and latency checks, and IP address lookup.
- *Webcam Test*: Test if your webcam is working properly.
- *Audio Test*: Test your microphone and speakers online.
- *Mouse Test*: Test for left-click (single and double), right-click (single and double), and scroll wheel function.
- *Keyboard Test*: Use a virtual keyboard to check for any damaged keys.
- *Pressure Sensitivity*: Currently under development.

value: Show HN: Free Online Hardware Testing Platform for PC/iPad/Phone


value: LinarAI

value: Show HN: CouldAI – Vibe Coding with Flutter

author: LinarAI


value: amittambulkar

value: Hey people, I built an app that is a bit outside of the tech world and fun. It's an app where you can save and print the colouring pages you like with just one click. We have a huge collection of colouring pages in all the categories you can think of. For kids, for teenagers and even for adults in different themes.

value: Show HN: Something different, built an Free Coloring pages App

author: amittambulkar


value:
Hey everyone!
Join us on August 27th for our first Social Impact SF x Remotely Good Mixer in San Francisco!
We’re marking the soft launch of Remotely Good as RemotelyGood.us and the launch of the Social Impact SF community by gathering local professionals across social impact to connect.
RSVP Here: https://lu.ma/jfctvs1o
Enjoy good music, free food, this free event space and gallery, and happy hour pricing all night. If you follow Remotely Good online and sign up for an account on remotelygood.us, you'll get a drink ticket on us!
If anyone is interested in sponsoring or tabling at the event, please reach out at remotelygood@substack.com!

value: Show HN: Sign Up at Remotelygood.us and RSVP for Our Soft Launch Party in SF


value: Show HN: YC Startups Semantic Map

title: Show HN: YC Startups Semantic Map


value: sabouri

value:
Options are hard to visualize and reason about. I'm building a tool that makes it easier to visualize how options trades behave and how different factors affect them.
GammaWins Calculator is already usable, with features I couldn’t find elsewhere (like charts with time on the X-axis). I’m adding more unique ones that traders I talk to keep asking for. I'm still using EOD data that is cheaper than live data, but plan to switch to live data soon.
If you trade options, I'd love to hear from you and understand your trading workflow. If you like this tool and want to hear more, I would be happy to share updates with you more regularly. Just send me an email, address at the end of the calculator page.

value: Show HN: GammaWins Calculator – An options scenario analysis tool

author: sabouri


value: tksii

value:
Hi everyone,
I just released an iOS app called ArXivToPrompt. It takes an arXiv paper, generates a clean LaTeX source, and copies it so you can paste directly into ChatGPT (or any other LLM app).
The idea comes from a CLI tool I built a few months ago, arxiv-to-prompt:
https://github.com/takashiishida/arxiv-to-prompt
I’ve been using the CLI tool daily to help me quickly understand arXiv papers. This downloads the arXiv source files, finds the main `\documentclass` file, and flattens everything into one coherent LaTeX source (people usually have multiple .tex files in a single paper by using `\input` and `\include`). It also has options to remove comments and appendices to shorten prompts.
I often used the CLI tool on my laptop, but since I commute by train in Tokyo I wanted somthing I could use on my phone. That's why I built the iOS app.
With equation-heavy papers, it may be better to provide the precise latex notation instead of providing the PDF. Uploading PDFs is also more difficult and time consuming (especially on the phone).
Thanks for reading! This is my first iOS app, and I’d appreciate your thoughts!

value: Show HN: iOS app (and CLI) for turning ArXiv papers into LLM-ready LaTeX prompts

author: tksii


value:
Hi HN,
I’ve been working on MemViz, a tool to help inspect and visualize memory in C++ programs. It’s aimed at developers, students, and systems engineers who want a simple way to look under the hood without firing up a heavyweight debugger.
What it does:
Inspect object layouts, padding, and alignment.
Explore vtables and runtime dispatch.
Track allocations and report possible leaks.
Hex-dump mapped memory regions (mmap / CreateFileMapping).
Uses modern C++20 features like std::bit_cast for safe reinterpretation.
Why I built it:
I found existing debuggers very powerful but often overwhelming for quick introspection. I wanted a lightweight, modern, and approachable tool to learn about object memory layouts, teach others about the C++ object model, and do simple leak/hex inspections.
Try it out:
Repo: https://github.com/LA-10/MemViz
It’s header-only in parts, with examples and test files you can build right away.
No signups, no barriers — just clone and run.
Feedback I’d love:
Is this useful in your workflow or teaching?
What features would you want for a simple memory visualization tool?
Where does it overlap or complement tools like ASan/Valgrind?
I’m around to discuss, answer questions, and hear any suggestions. It's very simple currently.
Thanks!

value: Show HN: MemViz – a modern C++ memory visualization tool


value: ehsania

value: A minimal demo of a typing indicator UI, built with v0.

value: Show HN: Typing Indicator Demo – Clean UI for realistic "typing " states

author: ehsania


value: volotat

value: Show HN: AI coding assistant that helps to build things, not to ruin them

author: volotat


value: gkoos

value:
Hey all,
as a little weekend project I built a privacy-focused temporary email service:
https://nullmail.cc
- No sign-up or personal info required.
- Instant, disposable, ephemeral mailboxes.
- Deletes all data on expiration.
- No tracking or logging of user data.
- No Cookies.
- Ideal for quick, anonymous email verification and sign-up flows.
- Domain rotation is the email domain gets blacklisted.
Github repo: https://github.com/gkoos/nullmail
Feedback is welcome here or on GitHub.
I know there are lots of other tempmail services out there, but I wanted to make sure the one I use doesn't collect any personal data so I came up with my own. And I open sourced it because I hope others might find it useful too.

value: Show HN: A Privacy-First Temp Email Service

author: gkoos


value: mbarinov

value:
As part of preparation for altseason, I built an open-source Model Context Protocol server for OKX exchange. It exposes read-only tools to AI assistants (e.g., Claude Desktop) so you can query:
get_account_summary (TVL, allocation)
get_portfolio (balances with USDT values)
get_positions (derivatives with P&L)
get_open_orders
get_order_history(instId, begin, end)
Security design: read-only API permissions, local processing, no persistence, direct OKX API comms.
GitHub: https://github.com/mbarinov/okx-mcp
Would love feedback, issues, and PRs.

value: Show HN: OKX MCP server for crypto portfolio and trading analytics

author: mbarinov


value: cursedknowledge

value: Support this project on Product Hunt: https://www.producthunt.com/products/agint

value: Show HN: Agint – Open-Source Interface for AI to Control Your Computer

author: cursedknowledge


value: ratmondo

value:
Be Visible in the Age of AI Search.
Don't let your business become invisible when customers ask AI. Our GEO platform ensures your brand appears in ChatGPT, Gemini, Claude, and other AI responses.

value: Show HN: Be Visible in the Age of AI Search. Start Generating Income from LLMs

author: ratmondo


value: trackmysitemap

value:
BestLanding audits not just your SEO, it fixes your words.
Most tools stop at technical checks.
BestLanding goes further: it analyzes your headline, description, and CTA, then instantly generates 25 high-converting hero section variations you can use right away.
You get:
- Headline & CTA performance analysis
- 25 AI-generated hero variations based on your page
- Indexability checks (robots.txt, noindex, canonical)
- Full SEO audit of your live page
- Actionable fixes for every issue blocking your visibility or conversions
Built for marketers, founders, and developers who know words sell as much as rankings.

value: Show HN: BestLanding – Boost Landing Page Clicks and Conversions

author: trackmysitemap


value: silverbirder

value:
Hi HN,
I built a small addon for Storybook called Range Controls.
It adds sliders to adjust story args — useful for stress-testing layouts with varying strings, numbers, and arrays.
Motivation:
I often used Storybook’s built-in argTypes with type: "range", which is great for primitives. But for nested cases like arrays of objects (e.g. tags inside a card), I found myself writing the same boilerplate over and over. This addon tries to make that setup easier.
- Live demo: https://develop--689dd119bb72c220c0ddb738.chromatic.com/
- npm: https://www.npmjs.com/package/storybook-addon-range-controls
- GitHub: https://github.com/silverbirder/storybook-addon-range-contro...
Feedback is very welcome — API clarity, missing features, or rough edges.
Thanks!

value: Show HN: Storybook Addon – Range Controls (sliders for strings, numbers, arrays)

author: silverbirder


value: forxtrot

value:
When developing eBPF-programs, we need to figure correct program-section SEC() and program-context.
Similary while creating eBPF-maps, we need to add certain fields such as; map-type, key/values, map_options etc..
If you’re like me, you probably end up digging through documentation or browsing open-source projects just to piece this together every time.
So, I created a vscode-extension to help with these repetitive tasks.
Try it out and do share your feedback. I hope you like it.
Thanks !

value: Show HN: Code-snippets for developing eBPF Programs

author: forxtrot


value: sayantanc

value:
I’ve released Echo, an open source project that runs entirely on-device to organize journaling, meeting notes, voice memos etc.
Key points:
Fully local: no online accounts or cloud dependency
Journaling: supports structured personal reflection alongside work/project logs
Voice-first: integrates Whisper for transcription, piper for TTS
Searchable memory: turns scattered notes into structured, queryable knowledge
Use cases: journaling, project tracking, meeting decisions, research progress, client preferences etc
Stack: FastAPI backend, React frontend, SQLite, Ollama for local LLMs, BGE embeddings, Whisper, Piper TTS
The goal of Echo is to be a privacy-first alternative to cloud AI assistants — one that combines journaling and productivity without giving up control of your data.
Repo: https://github.com/29sayantanc/Echo
Open for suggestions and feedback!

value: Show HN: Echo -An open source local AI platform for journal or notes

author: sayantanc


value: oliwary

value: Show HN: Explainle – explain words, AI tries to guess

author: oliwary


value: adrianhacar

value:
I wanted to find a way to use Instagram without ending up scrolling for two hours every time I open the app to see a friend's story.
Most screen time apps I found focus on blocking the app itself instead of the addictive feed, so I created this app to allow me to keep using the "healthy" and "social" features and block the infinite scrolling (Reels)
After implementing the block on Instagram Reels, I got addicted to YouTube Shorts and Reddit feed. So, I extended the app to cover these as well.
To avoid replacing the scrolling for regular feeds, I also added a feature that shows a pop-up when I'm overscrolling in any app. It forces me to stop and think for a minute before I continue scrolling.
I built it on Android Studio, using Kotlin and Jetpack Compose for the UI. I use the Accessibility Service to detect scrolls and navigate out of them. Unfortunately, this only works for Android. There is no way (as far as I know) to do this on iOS.
I'd love to hear your thoughts

value: Show HN: I built an app to block Shorts and Reels

author: adrianhacar


value: walkersumida

value: A sticky note bookmarks plugin for Neovim with git branch awareness and hover annotations

value: Show HN: Bookmarks plugin for Neovim with Git branches and hover annotations

author: walkersumida


value: mcharytoniuk

value: Show HN: I rewrote most of Llama-server in Rust, and made it scalable

author: mcharytoniuk


value: struy

value: Get instant access to the best TI 84 calculator online with complete graphing and scientific computation capabilities. This Chrome extension provides convenient side panel access to a powerful TI84 calculator from any webpage.

value: Show HN: Access TI 84 calculator online instantly from any webpage

author: struy


value:
https://news.ycombinator.com/item?id=42601864
It has added domain names, added embedding functions, and added plug-in downloads and blogs.

value: Show HN: Free Online TI-84 Plus CE Graphing Calculator – Update Domain


value: admtal

value:
I added Co-op online to Lazy Blocks.
Using PeerJS & WebRTC, so no server.
Hope you enjoy, let me know if you have and feedback, etc.
Thank you,
Adam
-- EDIT
Oh! -- Click the "Globe" icon to start online play
-- Edit 2
Oh! -- I should mention - the board is infinite, you can scroll and pan and zoom in all directions -- and you can always find the other player with one click

value: Show HN: Co-Op Tetris

author: admtal

title: Show HN: Co-Op Tetris


value: lexokoh

value:
I’ve been experimenting with AI agents lately, and one problem kept coming up: they either get a raw API key with full access or nothing at all. That’s risky, especially if you’re testing agents that can make arbitrary calls.
So I hacked together a tiny package called Kage Keys - https://github.com/kagehq/keys
It lets you wrap agent actions with scoped, short-lived tokens instead of handing over your real API keys.
Example:
```js
import { withAgentKey, getLogs } from "@kagehq/keys";
async function main() {
  await withAgentKey("github:repos.read", async () => {
    console.log("Agent is calling GitHub API...");
  });

  console.log(await getLogs());

}
main();
Right now it:
- Generates scoped, expiring tokens (default 10s)
- Logs every action to kage-keys.log
- Works as a drop-in wrapper for async functions
It’s just an MVP (tokens are fake UUIDs), but I want to see if developers find this helpful before building the production version with real crypto + proxy enforcement.
Repo: https://github.com/kagehq/keys
npm: https://www.npmjs.com/package/@kagehq/keys
Would love feedback, especially from anyone running agents in production or dealing with API key sprawl.

value: Show HN: Scoped, expiring API keys for AI agents

author: lexokoh


value:
I’ve been playing with multi-agent systems and kept hitting the same issue: agents duplicate work, step on each other’s tasks, or return conflicting results.
So I built a tiny package: Kage Bus - https://github.com/kagehq/bus
It’s a lightweight message bus that makes sure only ONE agent handles each task.
Example:
```js
import { createBus } from "@kagehq/bus";
const bus = createBus();
bus.on("task:research", (payload) => {
  console.log("Research agent:", payload.query);
});
bus.on("task:research", (payload) => {
  console.log("Backup agent:", payload.query);
});
bus.send("task:research", { query: "latest AI news" });
Right now it:
- Routes tasks to one agent (first-claim wins)
- Supports conflict resolution (last-writer-wins)
- Logs everything to agent-bus.log
Repo: https://github.com/kagehq/bus
npm: https://www.npmjs.com/package/@kagehq/bus
It’s just an MVP, but I’d love feedback from folks experimenting with multi-agent workflows:
Is this useful? What features would make orchestration actually production-ready?

value: Show HN: Spin up 5 agents that don't trip over each other in 10 lines of code


value: heliosinc

value:
Hi HN,
We've been frustrated with how confidently LLMs hallucinate—a dangerous flaw in high-stakes domains like health and medicine. The standard "I am not an expert" disclaimer feels insufficient since we all ignore those statements.
Our approach is a RAG/agentic system built to solve this. It runs on ~40M+ scientific papers, but goes beyond simple retrieval. A multi-agent workflow decomposes queries, cross-references claims against multiple sources, and synthesizes answers, ensuring every key statement is cited directly from the literature. Beyond the literature, our agent system has tools to access the internet, databases, and social platforms, with dedicated review agents to ensure proper citation and reduce hallucinations.
This is just the start. Our long-term goal is building health superintelligence by integrating multiscale data—from the genomic and cellular level all the way up to clinical studies in humans. To achieve this, we're exploring SFT, RL, and self-improvement techniques like GEPA to create models that can evolve their own scientific reasoning and to pioneer new standards for accuracy/hallucination mitigation. We plan to rigorously benchmark our work and share the data publicly.
We'd love specific feedback on:
Our RAG/agentic architecture—what failure modes are we missing?
On building superintelligence—beyond SFT/RL/GEPA, what other techniques should we be exploring for a model to truly understand multiscale biology/health/medicine?
Evaluation—what are the best benchmarks for medical/health AI trustworthiness today?
The site itself—any thoughts on the UI/UX, quality of the responses, or other features?
You can see the current system here: https://www.my-openhealth.com/

value: Show HN: Fighting Medical LLM Hallucinations with a Grounded RAG System

author: heliosinc


value: tommybez

value:
Turn any domain into a production-ready design system. Instantly generate responsive websites, apps, and landing pages that stay perfectly on-brand—no templates, no pixel pushing.
Built on top of brand.dev API and v0 sdk

value: Show HN: Branderize – Launch on brand experiences in minutes

author: tommybez


value:
I’ve been building Alexandrie, an open-source note-taking app focused on being lightweight, offline-friendly, and cleanly designed.
Built with Vue/Nuxt (frontend) and Go (backend)
Stores files via MinIO, supports hundreds of notes without slowing down
Designed for students, developers, and creators who want a simple Markdown workflow
Features: snippets, keyboard shortcuts, offline mode, export, structured categories
Repo: https://github.com/Smaug6739/Alexandrie
Contributions and feedback are welcome.

value: Show HN: Alexandrie – A lightweight Markdown note-taking app (Vue/Nuxt and Go)


value: DavidCanHelp

value: Show HN: A condensed CS book called Computers, written by Claude Code

author: DavidCanHelp


value: sinharishabh

value:
Hi HN,
I’m building an agentic IDE for hardware developers. It currently supports Arduino, ESP32, ESP8266, and a bunch of other boards (mostly hobbyist for now, but expanding to things like PlatformIO).
It can already write and debug hardware projects end-to-end on its own. The goal is to have it also generate breadboard views (Fritzing-style), PCB layouts, and schematics. Basically a generative EDA tool.
Right now, it’s already a better drop-in replacement for the Arduino IDE.
Would love feedback from folks here.

value: Show HN: Embedr – Agentic IDE for Arduino, ESP32, and More

author: sinharishabh


value: Open Source, client side encryption and decryption E2EE memo service. Privacy and security is main goals. No accounts, No cookies.

value: Show HN: Open-source client side E2EE memo service


value: physix

value:
Cyoda is a platform for building enterprise-grade, data-intensive backend systems.
We’re a small software vendor company with fintech startup clients in production for several years, and we have launched Cyoda as a PaaS to make this technology accessible to a broader audience.
You can think of Cyoda as having event sourcing + workflow engine + horizontally scalable database in one integrated system. Processing is transactional, querying is distributed and resilient, and business logic stays modular inside processors (actions) and criteria (gates) as part of the workflow.
We’ve created an AI assistant that helps you build your backend service through a chat dialogue that generates a prototype. It will build you a complete, runnable app, provision your environment, and deploy it. You can then switch to your own tools to continue development.
This type of lightweight modular system, where the platform engineering is mostly taken care of, makes AI much more effective when building complex backend systems.
The PaaS is still very fresh, and there’s a lot still missing and buggy in places. I would greatly appreciate feedback on the system design and architecture, particularly whether you think this platform has potential or not. There’s a Free Tier subscription, so you can play with it right away.
alpha AI assistant: https://ai.cyoda.net
website: https://cyoda.com
docs: https://docs.cyoda.com
github: https://github.com/Cyoda-platform

value: Show HN: A transactional event-driven application platform on Cassandra

author: physix


value: defluyter

value:
Got this idea last summer, and with AI video models improving since then, I started working on it more actively and just released it.
Right from the keyboard extension, you can prompt for any GIF and it will generate it on demand. Generation usually takes around 20 seconds (probably this will only get faster in the future). You get notified by a push notification when the generation has finished.
I have many more ideas to develop this further. I believe on demand GIFs bridge the gap between humor of different persons too, it allows you to convey a situation, a joke or an imagination way better. A way for AI to actually bring us closer as humans.
Try it out and let me know your thoughts!

value: Show HN: iOS keyboard for on-demand GIF generation

author: defluyter


value: panchamk

value: Show HN: Browser-based video transcriber using WebAssembly

author: panchamk


value: superstarryeyes

value:
Shown HN: Lue - Terminal eBook Reader with Text-to-Speech
Hello,
Just went live on GitHub with this project.
I really enjoy listening to my eBooks as audiobooks but was frustrated by the available options. Converting books into audiobooks with scripts is tedious, and most tools stumble over footnotes, headers, or formatting. I wanted something simple: just throw a book at it, and it starts reading immediately without any clicking or loading.
I also wanted it to be customizable and modular because new, better TTS engines are released all the time. For this initial release, I settled on Edge and Kokoro because they’re both fast (real-time) and good quality. I’ve already made modules for Kitten TTS, Gemini and a few others, and they work too. So I hope this setup is future-proof.
Here’s what Lue supports:
Multi-format: EPUB, PDF, TXT, DOCX, HTML, RTF, and Markdown.
Modular TTS system: Default Edge TTS (online) and Kokoro TTS (offline/local), with an architecture to add more models.
Rich terminal UI: Full keyboard and mouse support, customizable color themes, smooth scrolling.
Smart persistence: Automatically saves reading progress across sessions.
Cross-platform & multilingual: macOS, Linux, Windows, supporting 100+ languages.
I’d love feedback on both usability and the TTS experience. Are there any features you wish it had?

value: Show HN: Lue – Terminal eBook Reader with Text-to-Speech

author: superstarryeyes


value: vsaez

value:
I’ve built an MCP (Model Context Protocol) server for Spotify, so you can control music directly from MCP clients like Claude Desktop.
Features (v0.1.0):
- Playback: play, pause, next/previous, state, devices, volume, repeat
- Queue: add tracks, list upcoming
- Search: tracks, artists, albums (+ collection search for playlists/albums)
- Albums: details & tracks
- Artists: info, albums, top tracks
- Library: saved albums (list, check, save, remove)
- Playlists: list playlists, get tracks, create, rename, clear, add tracks
- Diagnostics: quick auth/env check
- MCP stdio server: JSON-RPC over stdio, integrates directly with Claude
Repo: https://github.com/victor-saez-gonzalez/mcp-spotify-player
Would love feedback from the HN community:
- Which Spotify features should I prioritize next?
- Any best practices to make MCP setup smoother?
Contributions welcome — and if this project is useful, a star helps others find it

value: Show HN: MCP Server for Spotify – control playback, queue, playlists

author: vsaez


value: GSGBen

value: Hey HN, I wanted to get more familiar with C programming, *nix socket programming and C compilation, so I wrote this "web" ""server"". It's running on a tiny SBC in my office, and there's as little as possible between you and it.<p>Happy for you to try and break it, hopefully with something more interesting than a DoS though :) Please let me know if you find any issues.

value: Show HN: unsafehttp – tiny web server from scratch in C, running on an orange pi

author: GSGBen


value: siim

value:
I built a tool to turn your ideas into X posts directly by taking a phone call to a conversational AI.
x11.social started voice-first. Now, it features an AI chat interface as well with smart UI elements like "give me 10 tweet options" that offer clickable CTA options.
This isn't a complete shift. It's the voice core, enhanced with chat for a smoother workflow and easier content creation.
Call a number or use your browser mic for voice dumps. It's hands-free, perfect for walking, driving, or just thinking out loud. With UI chat, you can craft deeper thoughts or continue from the voice convo where you left off.
This is my first SaaS after years in dev. Building the AI and editor is the fun part. Distribution? That's the real challenge.
Tested some ads, but data showed the funnel was broken. First fix: added free demo button on the landing page that lets users try browser voice to a demo account in real-time. No signup needed. Registered users unlock real calls.
I'm building in public, including video logs. A year ago? Never thought I'd do that. I'm open to ideas.

value: Show HN: X11.social – Call, talk, publish: voice-first AI for X with live demo

author: siim


value:
Hey HN,
Satoshi here. Thanks for checking out my post.
I'm an ex-dev who spent the last couple of decades in fintech, eventually ending up in management. I started this project as a form of catharsis after getting completely burned out by the corporate hype cycle.
What I'm "showing" you today is a GitHub repository of fictional incident reports. Each "release" is the technical artifact that accompanies an episode of a satirical animated series I'm creating called FinTrade Corp.
The idea is to ground the show in real-world technical failures. The GitHub repo is the "source of truth"—the post-mortems, the pull requests, and the bad code snippets are the real story, and the animation is the narrative that brings them to life.
I'm posting this here because I would genuinely appreciate your feedback on the artifacts themselves. Does the Root Cause Analysis feel plausible? Is the "bad code" snippet a realistic (and depressingly common) mistake? I'm trying to make this feel as authentic as possible to the developer experience.
The first case study that these artifacts are based on, "The Push to Prod," can be viewed here for context: https://youtu.be/EltUlQsFKyY
Thanks for taking a look. I appreciate ANY thoughts you have.

value: Show HN: I'm creating fictional incident report on GitHub for a satirical series


value: atbeme

value:
Hi everyone!
I've been loving building with AI, and over the past few years I've been leaning more and more into Typescript (and bun).
My team at inference.net is constantly trying to get more leverage out of AI and find ways to setup our codebase to be able to increase the level of correctness that our AI is able to write code at.
This starter repo is a very opinionated way to lay out a repo to lean into AI heavily.
It leverages Cloudflare Workers as a deployment target for the API (my goal is to never have to deploy an API on a AWS/Azure/GCP server ever again unless I get to a scale that absolutely requires it).
I'm also a big fan of tRPC for its type-coupling between the backend and frontend (you can also use Next App Router to get the same benefits).
Some key properties of the project:
- Its a monorepo, so everything the AI needs to see is in one place
- Very heavily leans into Taskfile (similar to Makefiles) to give the AI commands it can run to do complex tasks that give it feedback on its code (like linting/formatting/running the project/generating migrations)
- Uses strict typing to give the AI a strong feedback loop on the code it writes
- Uses the repository pattern to be able to easily swap out implementations for persistence
- Uses bun for its ease of use
- Leverages DI to allow configuration to be injected so it can easily be overridden when deploying to Cloudfalre Workers
- Has a very opinionated way to leverage markdown documents to give the AI strong context on how and when to do things
- Can be run end-to-end locally with zero external dependencies
*I'm looking for feedback.* Please don't hold back, tell me where you think it can be simpler (one area is maybe swapping out GoTrue for better-auth). And if there are patterns that you use to get more leverage and correctness out of AI, I'd love to learn about them!
Thank you for checking it out :)
- abe

value: Show HN: Full Stack Starter Repo Optimized

author: atbeme


value:
Manage and monitor Airflow clusters via Apache Airflow API, enabling DAGs operations, configuration changes, status checks, and request tracking through a unified MCP interface for simplified administration.
GitHub: https://github.com/call518/MCP-Airflow-API

value: Show HN: MCP-Server for Control Airflow Cluster


value: cleverbit

value: Show HN: WristGPT – Bringing ChatGPT to the Apple Watch

author: cleverbit


value: berhams

value: Show HN: AACC – concept-only youth-safety compliance blueprint (no build)

author: berhams


value: najiy

value:
Hi HN,
I’ve been building Taleweaver.io, an AI dungeon-style storytelling platform that combines narrative text, AI voiceovers, and parallax visual scenes.
Unlike AI Dungeon, where the experience is mostly text-based, Taleweaver adds narration and parallax scenes (leonardo.ai) for a more immersive experience. You can choose from guided directions or freewrite your own actions to shape the story however you like.
Currently, the pilot focuses on one narrator, with audio narration (Elevenlabs) as a premium option.
I'm waiting for next-gen video generator that can turn the stories generated into anime series.
I’d love feedback from this community on:
Whether voice + visuals actually improve immersion
What kinds of features you’d want in an AI-driven storytelling game
This is still early, and I’m shipping as part of a personal challenge to build multiple production-grade projects in 6 months. Feedback and critique are super welcome!
Thanks!

value: Show HN: Taleweaver.io – An AI Dungeon Competitor with Voice and Visuals

author: najiy


value: jetroni

value:
Tasklin is a Python CLI I’ve been working on that lets you run prompts across multiple AI models (OpenAI, Ollama, Anthropic, etc.) from one tool.
The latest update adds structured JSON output, making it easier to plug into CI/CD pipelines, scripts, or automation workflows.
Example use cases:
- Summarizing test logs or error reports in a GitHub Action
- Generating release notes from commit history
- Checking commit messages against a style guide
- Drafting documentation snippets automatically
I’d love to hear how people might use something like this in their own workflows, or what features would make it more useful for devs.
GitHub: https://github.com/jetroni/tasklin
PyPI: https://pypi.org/project/tasklin

value: Show HN: Tasklin outputs JSON and works with multiple AI models in pipelines

author: jetroni


value: SamuelKatsaros

value:
when catching up on my weekly watch of the social network
I wanted to do smt like facemash
having just applied to yc. I though ycmash was the natural + perfect idea
so, here it is: https://ycmash.vercel.app/
it's as simple as that
clean + retro ui
elo ranking algo
postgresql, well, supabase bc who doesn't use that
---
rlly just a late night thing
don't judge
but pls rank
id actually be interested to see who ranks 1st after a week or so

value: Show HN: Like Zuck's Facemash but for YC

author: SamuelKatsaros


value: danesherbs

value:
I built Procrastinope, an open-source alternative to Cold Turkey Blocker that focuses on privacy.
Cold Turkey Blocker is fantastic, but I was frustrated that it required trusting closed-source software that can see effectively all activity on my computer.
The main differentiator for Procrastinope is transparency -- unlike proprietary blockers, you can inspect exactly what it's doing to your system. In short, it works by modifying `/etc/hosts` and includes several anti-bypass features:
- Challenge-protected controls (type random strings to disable blocks)
- Auto-restart daemon to prevent killing the process
- Anti-tamper logic which prevents manual edits to /etc/hosts config files
- System-level blocking across all browsers
GitHub: https://github.com/danesherbs/procrastinope-public

value: Show HN: Procrastinope, an open-source website blocker

author: danesherbs


value: jayqinohboi

value: Youtube to PDF Recipe Converter

value: Show HN: I like cooking so I made this Free YouTube to PDF Recipe Converter

author: jayqinohboi

story_text: Youtube to PDF Recipe Converter


value: keleftheriou

value:
Siri sucks. And the "next AI wearable" everyone's searching for? You may be already wearing it.
ChatGPT's advanced voice mode + Apple Watch = the perfect match.
But why hasn't anyone built this yet? Because thanks to Apple, watchOS development is insanely, excruciatingly hard. That’s why most AI watch apps are just clunky Siri shortcuts, very slow, or require your phone nearby.
I don't want any of those tradeoffs. I want the most fluid, amazing voice interaction possible. I've been determined to make this happen, and after months of work, it finally works beautifully!
VIDEO: https://x.com/keleftheriou/status/1956932258293755955
Looking for feedback: How would you use this? What would you like to see next?
Cheers,
- Kosta

value: Show HN: Real-Time Voice AI for Apple Watch

author: keleftheriou


value: vincentyyy

value:
Hi HN!
I just launched A01 on the App Store! A01 is a personal news agent that follows exactly what you tell it to, without the algorithmic noise.
I built it because I often had to jump between different sites and platforms to stay updated. When topics get really niche, there’s no single platform to rely on, and I’d often get distracted by unrelated content along the way.
How A01 works:
- Ingests 2,000+ RSS feeds hourly (The Verge, NYT, Nature, IEEE, arXiv, etc.)
- Creates embeddings using Voyage
- Vector search matches your custom prompts against new content every hour
- Delivers only what matches your interests
From TestFlight to App Store:
We started with 300 TestFlight users who helped us refine the matching algorithms. Based on their feedback, we improved the semantic matching, covered more sources, and are now ready for broader release on the App Store.
Current status:
The product isn't perfect yet, but the core concept works well enough that I wanted to share it with the HN community for feedback. The semantic matching beats manually checking 10+ sources daily, though there are still edge cases we're working on.
Download on App Store: https://apps.apple.com/us/app/a01-your-personal-news-agent/i...
For Android users, sign up here: http://www.a01ai.com/
Really excited to hear what you think! Especially curious about what topics you'd want to follow that current news apps handle poorly, and any edge cases where semantic matching might fail.

value: Show HN: I made a personal news agent that follows anything you care about

author: vincentyyy


value: zzed

value: Adding popular problems in this. Give it a try.

value: Show HN: Built a low level system design platform, comments

author: zzed


value: helenfrancis

value:
Created a family app with an unusual goal: get families to stop using it as quickly as possible. Instead of optimizing for engagement, we optimize for "graduation" - families use it for 45days to build connection habits, then delete it and continue offline.
All data stays completely local (IndexedDB + localStorage fallback) -no servers, no accounts, no data collection. Families own their data and can export/delete everything with one tap.
The counter intuitive result: families who used it least after month 1had the best long-term outcomes. They'd developed the capability they needed and moved on to independent family wellness.This made us realize most family apps have the wrong success metrics.
High engagement often means families are stuck, not succeeding. We started measuring success by how quickly families could confidently delete our app.Now exploring how this "graduation platform" model could apply to other areas - education apps that build genuine understanding,productivity tools that teach intrinsic organization skills, fitness apps that create lasting habits without digital dependency.
Anyone else building privacy-first apps designed for planned obsolescence?

value: Show HN: Built a family wellness app designed to be deleted after 45 days

author: helenfrancis


value:
Hi HN,
I built an iOS app called Tube PiP because I was frustrated with the official YouTube app locking useful features behind Premium.
Tube PiP gives you:
-  Picture-in-Picture (PiP) playback
-  Background / lock screen playback
-  Sleep timer
-  No ads
-  Hide Shorts (for sanity)
All the stuff you normally have to pay for—free.
App Store link: https://apps.apple.com/us/app/tube-pip-pip-for-youtube/id647...
I’d love to hear what you think. Feedback, bug reports, feature requests—bring it on!

value: Show HN: Tube PiP – A free YouTube app for iOS with PiP, background play, no ads


value: kangfeibo

value: Show HN: DraStic Emulator–Best Nintendo DS Emulator for Android

author: kangfeibo


value: qwikhost

value: Download videos from FB groups, pages & profiles in one click. Fast & simple Facebook video downloader.

value: Show HN: Facebook Videos Downloader – Save FB Videos

author: qwikhost


value: kutlugsahin

value: Hi guys, I would like to share a react framework that we actively using in our team, addressing layered architecture, state management and DI issues. It completely changes how you write your react application. If you're looking for a fresh and new approach give it a try :)

value: Show HN: Impair – react framework that scales

author: kutlugsahin


value: xakpc

value:
Since last week I played a lot with using new dotnet run app.cs feature, as well as Agents in Visual Studio and in terminal. And I found out that this feature works very good with MCP concepts
You basically could write whatever you need (like I did with image resizer), add it to .mcp.json and run it locally, no Docker containers or npm dependencies or anything else required. Each server is completely self-contained: everything from the MCP protocol implementation to the actual tools in one .cs file
So over the weekend I created open-source catalogue to collect cool and useful one-file MCPs and I welcome you to try to create some MCPs for your work and maybe share them with the world

value: Show HN: A catalog of single-file MCP servers build with C#

author: xakpc


value: raxrb

value: Hi Everyone, I am working on a dictation tool for last 6 months and this is my first time launching it on the Hacker News. It comes with Android, IOS, Mac and windows app.

value: Show HN: Dictation Daddy, A smart dictation tool

author: raxrb


value: Forgret

value:
NZ1 is a small compression algorithm designed for embedded systems and IoT.
Minimal code with no external dependencies.
SIMD support (AVX2, NEON, SSE2) for fast compression and decompression.
Configurable window size (1 KB–1 MB).
Built-in CRC32 for data integrity.
Achieves high compression ratios on repeating data with stable speeds (~30 MB/s).
Repository: https://github.com/Ferki-git-creator/NZ1
Full docs: https://ferki-git-creator.github.io/nz1-site/

value: Show HN: NZ1 new compression for embedded systems and games

author: Forgret


value:
Hi HN,
I built RedactMyPDF.com after struggling to manually redact a large legal PDF, and I found that existing tools were either expensive or clunky.
RedactMyPDF uses AI (Gemini) + OCR + human review to make redaction fast but safe:
Auto-detects sensitive info based on document context (names, addresses, IDs, etc.)
Full control to accept, reject, or add redactions
Works on scanned PDFs (OCR with Tesseract)
Secure & GDPR-compliant (AES-256, EU storage, one-click deletion)
Irreversible blackouts + metadata removal
Audit logs (CSV export for compliance)
Try it here: www.redactmypdf.com
Thanks!

value: Show HN: RedactMyPDF.com - AI-assisted PDF redaction with human review


value: djyde

value: Show HN: 16 Personalities but for Programmers

author: djyde


value: maximedupre

value:
I built a small scraper that does one thing well. You pass URLs. It follows internal links and returns the emails it finds. Focus is speed and low noise.
Stack and guardrails: Crawlee + Cheerio. 15s timeout per page, 2 retries, cap at ~100 requests, deduped emails. Pulls from mailto and visible text. A typical site finishes in under 30s.
Output: JSON rows { url, email }. Export as CSV or pipe to your own thing.
Use it from code: API clients in JS and Python, OpenAPI, CLI, and an MCP endpoint. One token and a single call.
Pricing: pay per result. 5 dollars per 1,000 emails. You can try it free first.
What I want from HN: edge cases where it breaks, false positives you notice, limits that feel off. Sample sites welcome.

value: Show HN: Website Emails Scraper, find emails on any site with API and CLI

author: maximedupre


value: bobrippling

value:
I wrote a little neovim plugin to track :command and mapping usage - I found I'd have a "good idea" for a plugin, write it (or download it) and forget about it, but it'd still be there in my vim config and maybe impacting startup time.
So I had another "good idea" and wrote a plugin to summarise usage of plugin scripts, the idea being that I can find ones I rarely use, and drop them.
If you're interested and use neovim, there's install instructions in the README

value: Show HN: Command and mapping usage tracker for Neovim

author: bobrippling


value: londonanon

value: Show HN: Gedit status bar word count plugin

author: londonanon


value: sunnyba

value: Sharing a casual look on how different models perform in games of Scrabble against each other!

value: Show HN: Forcing LLMs to Play Scrabble Together (ScrabbleBench)

author: sunnyba


value: tikrack

value:
I built a minimal esoteric programming language called iusearchbtw.
The language has a single “command”: i use arch btw.
You wrap repeated commands in parentheses ( ... ). The number of repetitions determines the character output.
Supports uppercase, lowercase, symbols, and spaces.
The release is a static Linux binary, so it runs without dependencies.
Example usage:
./iusearchbtw hello.iusearchbtw
Full character map, examples, and a README are included in the repository.
It’s primarily a fun exercise in encoding, counting, and building tiny interpreters.

value: Show HN: I made a language where the only command is "I use arch btw"

author: tikrack


value: ImDarkTom

value:
Hi HN,
I've been using Ollama recently and wanted a GUI that's both powerful and able to run across multiple devices. Existing solutions like OpenWebUI didn't grab me since I'd have to install either Python or Docker just to run a GUI.
So I made LlamaPen. LlamaPen is an open-source, web-GUI that lets you interface with your local instance of Ollama without needing to install anything extra. It supports the basics like chats, conversations, and model selection, and also has additional features, such as model management & downloading, mobile/PWA/offline support, formatting markdown and model think text, and more.
GitHub repo: https://github.com/ImDarkTom/LlamaPen
Official instance: https://llamapen.app/

value: Show HN: LlamaPen – An open-source web-GUI for Ollama

author: ImDarkTom


value: yeahgoodok

value: As a burnt-out software engineer, I occasionally fantasize about not needing to worry about holding on to my job. To this end, I've been working on a calculator to help me count down the date until I achieve financial independence. This past weekend I've improved upon the calculator such that it can more precisely predict the date, within tenths-of-a-year.<p>I know not everyone is a fan of forecasting, or may have concerns about the underlying methodology behind dynamic withdrawals. Fortunately for you, the underlying withdrawal strategy is available on ficalc.app, where you can run historical simulations to see how it would have performed in various scenarios throughout US history. Just select "Dynamic SWR" in the Withdrawal Strategy dropdown.

value: Show HN: Predict when you'll be financially independent

author: yeahgoodok


value:
I built Nap Time, a small Android app for people who like taking quick naps but don’t want the hassle of fiddling with timers. Instead of using an in-app timer, Nap Time sets alarms directly in your system clock app.
That means you get all the benefits of your regular alarms: snooze, your favorite alarm sound, vibration patterns, and full reliability.
Features:
One-tap nap presets (15, 30, 45, 90 minutes, or custom).
Home screen widget for even faster naps.
Nap history to see how often (and how long) you’ve been napping.
Preferences to tweak your defaults.
Right now, it’s Android only (since iOS doesn’t allow apps to set system alarms).
Would love feedback on:
UX (is it as quick as possible to set a nap?)

value: Show HN: Nap Time – Set system alarms like a timer


value: anwitars

value:
Hi HN,
I built Trails, a transparent URL shortener with a simple public API.
Unlike most URL shorteners, Trails:
- does not store IPs - visits are counted using a SHA-256 hash, so they can’t be linked back to users
- Lets you “peek” at a short link before clicking, so you know where it goes
- Has no accounts, paywalls, or tracking — just a free API
You can find examples on the GitHub page, and also it has a public website that uses this service: https://trls.link/
API repo: https://github.com/anwitars/tiny-trails
Web client repo: https://github.com/anwitars/trails-web
I would love feedback on design decisions, and the roadmap included in the API's readme, especially the dynamic Trails idea.

value: Show HN: Trails – a transparent, privacy-first URL shortener API

author: anwitars


value: Show HN: Bhava – AI-first diagram editor (text/image → diagram)


value: ahmedhosssam

value:
How does it work?
Chatbang works by scraping ChatGPT's website. It opens ChatGPT on a headless session when you execute Chatbang and take your prompt and paste it in ChatGPT's prompt area and execute that prompt, then it waits for the response and copies it as a markdown format and then render it in the terminal.

value: Show HN: Chatbang – Access ChatGPT from the terminal without an API key

author: ahmedhosssam


value: nextdns

value:
We just shipped a new feature in NextDNS: Bypass Age Verification.
More and more sites (especially adult ones) are now forcing users to upload IDs or selfies to continue. We think that’s a terrible idea: handing over government documents to random sites is a huge privacy risk.
This new setting workarounds those verification flows via DNS tricks. It’s available today to all users, including free accounts.
We’re curious how the HN community feels about this. Is it the right way to protect privacy online, or will it just provoke regulators to push harder?
https://nextdns.io

value: Show HN: NextDNS Adds "Bypass Age Verification"

author: nextdns


value: Show HN: Type Pulse AI (Beta) – Supercharge Your Writing Flow


value: tapeo

value: Show HN: A browser with organized and productive tabs, folders and more tweaks

author: tapeo


value: Cyao

value: Show HN: Icepi Zero – The FPGA in a Pi Zero Form

author: Cyao


value: bobnarizes

value: Show HN: Fallinorg - Offline Mac app that organizes files by meaning

author: bobnarizes


value: mintflow

value:
I love Tailscale, but I needed to connect to multiple VPN endpoints simultaneously, so I built MintFlow NetStack to solve this issue. However, I still wanted to use Tailscale for easily connecting to my infrastructure servers and homelabs, which created some challenges:
iOS doesn't allow running multiple VPN applications at once
Integrating Tailscale into MintFlow NetStack wasn't feasible because the Go runtime consumes too much memory
So I built NovaAccess to solve this pain point for myself and others facing the same issue. It leverages Tailscale's open-source code and integrates a native SwiftUI SSH terminal into the app. Users can connect to their Tailscale network (tailnet) without running the official Tailscale app – it even works alongside other running VPN applications.
I started considering this idea 10 months ago and decided to build it a month ago. Development went surprisingly well and Apple approved it quickly. AI helped tremendously with the UI work – I never imagined I could complete this app in just one month.

value: Show HN: NovaAccess – Alternative SSH client for tailscale network with o VPN

author: mintflow


value: panphora

value:
Hi HN! I got so frustrated with modern WYSIWYG editors that I started to play around with building my own.
The problem I had was simple: I wanted a low-tech way to type styled text, but I didn't want to load a complex 500KB library, especially if I was going to initialize it dozens of times on the same page.
Markdown in a plain <textarea> was the best alternative to a full WYSIWYG, but its main drawback is how ugly it looks without any formatting. I can handle it, but my clients certainly can't.
I went down the ContentEditable rabbit hole for a few years, but always came to realize others had solved it better than I ever could.
I kept coming back to this problem: why can't I have a simple, performant, beautiful markdown editor? The best solution I ever saw was Ghost's split-screen editor: markdown on the left, preview on the right, with synchronized scrolling.
Then, about a year ago, an idea popped into my head: what if we layered a preview pane behind a <textarea>? If we aligned them perfectly, then even though you were only editing plain text, it would look and feel like you were editing rich text!
Of course, there would be downsides: you'd have to use a monospace font, all content would have to have the same font size, and all the markdown markup would have to be displayed in the final preview.
But those were tradeoffs I could live with.
Anyways, version 1 didn't go so well... it turns out it's harder to keep a textarea and a rendered preview in alignment than I thought. Here's what I discovered:
- Lists were hard to align - bullet points threw off character alignment. Solved with HTML entities (• for bullets) that maintain monospace width
- Not all monospace fonts are truly monospace - bold and italic text can have different widths even in "monospace" fonts, breaking the perfect overlay
- Embedding was a nightmare - any inherited CSS from parent pages (margin, padding, line-height) would shift alignment. Even a 1px shift completely broke the illusion
The solution was obsessive normalization:

    // The entire trick: a transparent textarea over a preview div
    layerElements(textarea, preview)
    applyIdenticalSpacing(textarea, preview)

    // Make textarea invisible but keep the cursor
    textarea.style.background = 'transparent'
    textarea.style.color = 'transparent'
    textarea.style.caretColor = 'black'

    // Keep them in sync
    textarea.addEventListener('input', () => {
      preview.innerHTML = parseMarkdown(textarea.value)
      syncScroll(textarea, preview)
    })

A week ago I started playing with version 2 and discovered GitHub's <markdown-toolbar> element, which handles markdown formatting in a plain <textarea> really well.
That experiment turned into OverType (https://overtype.dev), which I'm showing to you today -- it's a rich markdown editor that's really just a <textarea>. The key insight was that once you solve the alignment challenges, you get everything native textareas provide for free: undo/redo, mobile keyboard, accessibility, and native performance.
So far it works surprisingly well across browsers and mobile. I get performant rich text editing in one small package (45KB total). It's kind of a dumb idea, but it works! I'm planning to use it in all my projects and I'd like to keep it simple and minimal.
I would love it if you would kick the tires and let me know what you think of it. Happy editing!
---
Demo & docs: https://overtype.dev
GitHub: https://github.com/panphora/overtype

value: Show HN: OverType – A Markdown WYSIWYG editor that's just a textarea

author: panphora


value: iapi

value: Show HN: Secure backup for BIP-39 mnemonics using Shamir's Secret Sharing

author: iapi


value: silverveskilt

value:
I decided to productify my code visualizer tool that I originally built for myself and have now been using in 2 of my projects. There's a quick demo page available now.
I built the app for 2 reasons:
1) Maintaining the shape of a codebase in your head is exhausting for the brain, yet it's necessary to make decisions in development work, and so we gradually build some sort of picture in our head. I think it's slow and unnecessary.
2) After 10 years of working in software engineering, my understanding is that communication is what makes software development expensive. Maybe I can help.
So my vision with this project is to
1) steer the developer away from the exercise of chasing logic flows by frantically jumping between lines of code, only to remain as a communication bottleneck.
2) have a simplified model of the software available as a backdrop for communicating the development work and possible decisions and effects to non-technical team members.
3) Bonus: create a visual-first development experience for back-end, kind of following suit of a react plugin that I made a few months ago: https://github.com/silverveskilt/react-jump2source (Yes, you should definitely check it out if you're working with React).
I'm posting because if enough people resonate with these ideas, I could turn this project into more of an official endeavour. Thanks for your time!!
Also let me know if you have an alternative graphic tool that you use for visualizing your codebase!

value: Show HN: A lightweight code visualizer tool for TypeScript and C# projects

author: silverveskilt


value:
Quick update: We've added the most requested features to LimeLink (Firebase Dynamic Links alternative) - full API support for programmatic link generation, custom subdomain support for branded links, and complete link parameter passthrough including UTM tracking.
Free tier still includes 50K conversions/month, Pro at $10/month unlocks all API features and custom subdomains.
API docs: https://limelink.org/guide/api-spec
Would love your feedback on the implementation!

value: Show HN: LimeLink Update – Added API Support, Custom Subdomains, Link Parameters


value:
We use this for tool calling in https://github.com/katanemo/archgw, that uses a 3b function-calling LLM to map a user's ask to one of many tools for routine agentic operations in an application.
Why we do this: latency. A 3b parameter model, especially when quantized, can deliver sub-100ms time-to-first-token and generate a complete function call in under 100ms. That makes the LLM “disappear” as a bottleneck, so the only real waiting time is in the external tool or API being called + the time it takes to synthesize a human readable response.

value: Show HN: Detecting hallucinations in LLM function calling with entropy


value: KaoruAK

value:
I just released the open-source beta of DNC (DIAC NET CHAIN), a decentralized Python-based economic system with no global blockchain. Each peer acts as a wallet, miner, and validator, with LAN and WAN discovery, mining metrics, a basic GUI, reputation scoring, guardian-based recovery, and a working Proof-of-Storage demo. There’s also a compiled .exe for Windows. The repo is fully open—please fork it, test it, break it, and suggest or build improvements to the UI, peer protocol, recovery logic, or new features. Contributions to help stabilize and extend the core protocol are especially appreciated.
GitHub: https://github.com/POlLLOGAMER/DNC-DIAC-NET-CHAIN

value: Show HN: DNC – A Decentralized Economic Protocol (No Blockchain)

author: KaoruAK


value: mnapoli

value:
This is my week-end project. I needed this for another project that shows a list of website.
Showing the favicon of websites can be surprisingly hard if you want it to be more than just blindly grabbing website.com/favicon.ico.
This is built on Cloudflare Workers.

value: Show HN: Get the Favicon of Any Website

author: mnapoli

title: Show HN: Get the Favicon of Any Website


value: kenforthewin

value: Show HN: Docker-mcp-server – sandbox coding environment for agentic AI

author: kenforthewin


value: anyg

value: Show HN: Super simple offline app to track yearly goals

author: anyg


value: Loyae

value: Show HN: Large Stock Model (LSM)

author: Loyae

title: Show HN: Large Stock Model (LSM)


value:
Ops maintenance was a major source of burnout in Palantir and Chainlink
On paper, the happy path is:
* PM writes a runbook spec
* Eng turns it into tools or automation
* Ops executes and feeds back learnings
In reality, tribal knowledge drifts, edge cases pile up, and small rule changes stall until they *maybe* make it into a sprint. Over time, papercuts snowball into "CODE RED" incidents that grind feature work to a halt—sometimes for weeks, even months.
So I built the solution I wish I had: Runbook—a runbook that actually runs. From a single view, I can:
* Turn my process specs into plain-english automation
* Execute and see the process run in the browser in real-time
* Feed ops learnings back into the spec and automation instantly
Check the MVP out at: https://runbook.run and give a shout at clemsut@gmail.com if you're excited about reshaping the future of Ops

value: Show HN: Runbooks That Run

title: Show HN: Runbooks That Run


value: robinfaraj

value:
Hey HN!
We built Postel because posting consistently on X was taking way too much time and mental energy.
With Postel you can:
- get personalized post ideas in your voice
- see how other creators would write your idea
- turn YouTube/videos/articles/podcasts into short posts
- repurpose your existing content & brand knowledge
- browse thousands of viral tweets
→ draft, edit, and schedule posts
Would love to hear what you think!
Cheers!

value: Show HN: Postel, a personal content and growth coach for X/Twitter

author: robinfaraj


value: Show HN: Self-hosted Brainfuck compiler (for macOS)


value:
Hi Hacker News:
A few months ago, I got really into Tao Te Ching and I Ching. The ideas inside stuck with me so much that I felt a real need to build something to share them. So, I made this: https://IChingDAO.Love
The goal is to create a simple, quiet place online where anyone can read and reflect without distraction. No ads, no analytics, no pop-ups—just the original texts and some interpretations.
I just launched it and would love to hear your thoughts.

value: Show HN: A simple site for Tao Te Ching And I Ching


value: reverdin

value:
I built heicconvert.it — a fast, private, and completely browser-based HEIC/HEIF image converter that supports output conversion to JPEG, PNG, WebP, or even AVIF.
Why I made it:
- Photos from iPhones often come in HEIC format, which isn’t broadly supported everywhere.
- Existing tools tend to require uploads, compromise privacy, or feel clunky.
- I wanted a zero-friction, client-side tool where conversion happens instantly, in your browser, without ever touching a server.
Try it
- https://www.heicconvert.it
- No signup, no tracking, and no data is sent to anyone.
What’s inside:
- Built entirely in-browser using WebAssembly and client-side APIs—so nothing gets uploaded :contentReference[oaicite:2]{index=2}.
- Drag-and-drop / file picker, selection of output format, and instant conversion UI.
- Future formats supported: JPEG, PNG, WebP, and AVIF :contentReference[oaicite:3]{index=3}.
Limitations:
- Might be slower on very large files or older browsers.
- AVIF output support is experimental and may vary.
I’d love feedback on:
- UI clarity: is converting as easy to understand as it seems?
- Browser compatibility—any weird failures on certain browsers or devices?
- Any missing formats or quality options you’d like.
Happy to answer any questions — thanks for trying it out!

value: Show HN: Heicconvert.it – HEIC → JPEG, PNG, WebP or AVIF In-Browser (No Upload)

author: reverdin


value:
I got tired of open file.docx → wait 8 seconds → close Word just to read a document, so I built a terminal-native Word viewer!
What it does:
* View `.docx` files directly in your terminal with (mostly) proper formatting
* Tables actually look like tables (with Unicode borders!)
* Nested lists work correctly with indentation
* Full-text search with highlighting
* Copy content straight to clipboard with `c`
* Export to markdown/CSV/JSON
Why I made this:
Working on servers over SSH, I constantly hit Word docs I needed to check quickly. The existing solutions I'm aware of either strip all formatting (docx2txt) or require GUI apps. Wanted something that felt as polished as [glow](https://github.com/charmbracelet/glow) but for Word documents.
The good stuff:
* 50ms startup vs Word's 8+ seconds
* Works over SSH (obviously)
* Preserves document structure and formatting
* Smart table alignment based on data types
* Interactive outline view for long docs
Built with Rust + ratatui and heavily inspired by Charm's [glow](https://github.com/charmbracelet/glow) package for viewing Markdown in the CLI (built in Go)!

    # Install
    cargo install --git https://github.com/bgreenwell/doxx

    # Use
    doxx quarterly-report.docx

Still early but handles most Word docs I throw at it. Always wanted a proper Word viewer in my terminal toolkit alongside `bat`, `glow`, and friends. Let me know what you think!

value: Show HN: Doxx – Terminal .docx viewer inspired by Glow


value: kotauchisunsun

value:
I’ve been running a daily analysis of 9,000 GitHub repos across 30 programming languages, tracking how developers use AI coding agents.
Some interesting patterns:
– TypeScript is consistently the top language paired with AI coding tools
– Claude Code has actually overtaken GitHub Copilot in usage
– Covers 16 agents across 30 languages
This is a personal project I built out of curiosity, updated daily: https://ai-coding.info/en
Curious what other signals people would want to see from the data.

value: Show HN: Daily analysis of 9k GitHub repos using AI Coding Agents

author: kotauchisunsun


value: ardakaan

value: Show HN: Retly- collect feedback like a boss (free)

author: ardakaan


value: Show HN: BoneClone – A tool to autodiscover repos to propagate skeleton changes


value: acxtrilla

value: I made a Bluesky app that's 100% Swift based. It uses the latest Liquid Glass Design language and iOS 26+ API's

value: Show HN: A iOS Native Bluesky App

author: acxtrilla

title: Show HN: A iOS Native Bluesky App


value: lonelydexter

value: Show HN: Aulico – GPT for Financial Markets

author: lonelydexter


value: MADEinPARIS

value:
Show HN: Provability Fabric — From Guardrails to Guarantees for AI Agents
https://mateopetel.substack.com/p/provability-fabric-the-saf...
Most AI “safety” today is just vibes.
Prompts get hardened, heuristics stacked, dashboards blink green. But when agents can call tools, stream outputs, or mutate state, vibes don’t scale. You need math wired into the runtime.
Provability Fabric (PF) is a framework for proof-carrying behavior:
Spec-to-Proof layer → ActionDSL policies compile to Lean 4 obligations + runtime monitors
Provable Agent Bundles (PABs) → signed packages binding spec, proofs, SBOM, provenance
Rust sidecar → complete mediation of all events (call, ret, log, declassify, emit_chunk, emit_end)
Egress certificates → every output gets a signed verdict (pass/fail/inapplicable)
TRUST-FIRE test suite → stress tests for chaos, rollback, privacy burn-down, adversarial adapters
The core bet:
“Safety isn’t a setting. It’s a correspondence proof between your semantics and your runtime.”
Would love HN’s take:
Is this the right way to move beyond vibes toward falsifiable guarantees?
Should proof-carrying bundles (like PAB-1.0) become the standard for deploying agents?
What would it take for you to trust an agent in prod — proofs, monitors, or something else?

value: Show HN: Provability Fabric – From Guardrails to Guarantees for AI Agents

author: MADEinPARIS


value: saulmm

value:
Hi HN,
I’ve been working nights and weekends on my first Android app, and last week I finally launched it. It’s called Kibo, a simple, privacy-focused expense tracker that uses AI and OCR to make logging expenses less painful.
The problem I wanted to solve:
I tried a bunch of budgeting apps, but most were either slow, bloated, full of ads, or locked basic features behind subscriptions. I wanted something I’d actually use every day — fast, lightweight, and private.
What Kibo does:
 • AI suggests categories + emojis instantly from the expense name
 • OCR reads receipts and fills in transaction details automatically
 • Clean Material You design with light/dark/system themes
 • Free tier includes 20 transactions/month with unlimited custom categories
 • Secure cloud sync (end-to-end encrypted)
Tech stack:
Built with Kotlin + Jetpack Compose, Firebase for auth/storage, and MLKit for OCR. AI categorization uses a lightweight NLP model fine-tuned on category datasets.
I’d love feedback on both the UX and the technical side. How would you approach improving discoverability of a niche consumer app like this? Also open to suggestions on the architecture — right now everything runs client-side except sync.
Play Store link: https://play.google.com/store/apps/details?id=com.kibo.app
Thanks for checking it out — happy to dive into the code or design decisions if anyone’s curious.

value: Show HN: Kibo, AI expense tracker for Android with AI categorization

author: saulmm


value: dkozyatinskiy

value: Show HN: RansomLeak – Free 3D interactive security awareness training

author: dkozyatinskiy


value:
Hi HN! I built https://chattopdf.app after losing important WhatsApp conversations when switching phones.
The problem: WhatsApp's built-in export creates messy .txt files that are hard to read and share professionally. Whether it's business conversations, family memories, or legal documentation, there's no clean way to archive chats.
What it does:
Converts WhatsApp exported chats into clean, formatted PDFs
Preserves timestamps, sender names, and message flow
Handles media placeholders and emoji properly
Works with both individual and group chats

value: Show HN: Convert WhatsApp chats to PDF – preserve conversations permanently


value: enzovt

value:
Hi HN,
I’m a high school student in Seattle who loves riding hills.
I found that route makers like Google Maps get you from point A to B on a bike, but they don’t give you fun routes. So i made my own
RouteScout lets you:
-              Control the surfaces (never gravel or dirt with a road bike!) on the route
-              Indicate your preference for hills (I LOVE or HATE hills gives you different routes)
-              Prefer routes with bike lanes and cycling paths and roads made for bikes.
-              Filter types of roads (big roads gone!)
-              And when looping around it won’t take you back on the same exact road on the way back
*Upcoming feature*: Being able to use your previous activities from Strava to give you the option to favor roads that you’ve never been on (or have been on).
The app is free forever (without selling daya). Try it here: https://routescout.tennisbowling.com
I wrote all of the routing, database, and logic (no AI) So if you end up running into any issues please email me at rs@tennisbowling.com and i’ll fix them asap.

value: Show HN: RouteScout – A bike routing app that lets you love or hate hills

author: enzovt


value: geminimir

value:
We kept breaking production with small prompt edits — suddenly outputs weren’t valid JSON, fields disappeared, or formats changed silently.
So we built Promptproof, a GitHub Action that runs in CI and blocks PRs when prompts produce invalid outputs.
Features:
- Validates JSON output
- Enforces required keys & schemas
- Runs fast in CI (no external infra)
- Works with OpenAI, Anthropic, and local models
- Adds PR comments so reviewers see failures immediately
We’d love feedback: which rules or integrations would make this most useful for you?
Repo: https://github.com/geminimir/promptproof-action

value: Show HN: Promptproof – GitHub Action to test LLM prompts, catch bad JSON schemas

author: geminimir


value: Drimiteros

value:
# Da-Chess
My attempt on a basic, in the works, chess game made in C++ and SFML 2.6.0!<p>---
###  Features
- All pawn movements (includes even complex ones like en passant, castling & pawn promotion)
- Basic evaluation system (takes into account material count, piece positioning and total available moves)
- Basic timer (Automatically stops/starts based on the turn)
- Piece sounds (boop, bap, pop)<p>---
###  Libraries used:
- SFML 2.6.0

value: Show HN: I Made a Chess Game

author: Drimiteros

title: Show HN: I Made a Chess Game


value: bilater

value: Show HN: GIF Face Swapper – Transform any GIF with your face in seconds

author: bilater


value: DavidCanHelp

value: Show HN: An Elisp tutorial made to run inside Emacs (constructed by Claude Code)

author: DavidCanHelp


value: nisrulz

value:
I built Open WhisperScribe after struggling with the complexity, paywalls, or limitations of most speech-to-text tools for macOS and elsewhere. My main requirements were:
Simple, <5-min setup
Runs fully offline, locally (no data leaves your machine)
Works seamlessly in any app — just press a hotkey, speak, and your words appear where your cursor is (code editors, terminal, you name it)
Fast and distraction-free
It uses OpenAI’s Whisper model under the hood, but wraps it in a lightweight CLI tool that sits quietly in the background. The project is open source (Apache 2.0). Setup is a single script, everything is automated.
Demo, install info, and details: https://github.com/nisrulz/open-whisperscribe
Feedback and constructive criticism is welcome!

value: Show HN: Open WhisperScribe – Offline speech-to-text for any app

author: nisrulz


value: laffcollie

value:
Hi HN! Solo dev here.
The mechanic: If the answer is BREAK, I remove all B,R,E,A,K letters from the clue "Rest period" → "□□st p□□iod"... creates a cool back-and-forth dynamic between clue and answer. The answers words go on to create a phrase referred to by the cryptic title of each puzzle.
Built this in 4 weeks with React/TypeScript. Launched 3 days ago, now have 36 players across 15 countries.
Today I added a cricket-themed puzzle targeting India (every word has double meaning - cricket AND romance).
Technical details:
- 4300-line React component (yes, needs refactoring)
- Zero-downtime blue-green deployments
- PWA with offline support
- localStorage for game state
Biggest challenge: The mechanic isn't immediately intuitive. Working on a video tutorial.
Would love feedback on the concept and UX. Just deployed a major improvement showing answer patterns below clues based on Reddit feedback.
Free, no ads, just wanted to see if this idea resonates.

value: Show HN: I invented a new type of crossword with partially obscured clues

author: laffcollie


value: novoreorx

value:
Show HN: ASCII Tree Editor
I've created a web-based editor for ASCII file directory trees called asciitreeman. It's designed to make it easier to edit and reorganize the output of the tree command.
You can try it out here: https://reorx.github.io/asciitreeman/
And the source code is on GitHub: https://github.com/reorx/asciitreeman
Some of the key features include visual tree editing with drag-and-drop-like operations, real-time sync where changes are immediately reflected in the ASCII output, keyboard shortcuts for navigation (J/K or arrow keys), and auto-saving your work to local storage.
What's interesting is that I used Claude Code to "vibe-code" this project in a very short amount of time. It was a fun experiment in AI-assisted development. For those curious about the process, I've included the prompts and specifications I used in the source code. You can check them out in the spec.md and CLAUDE.md files in the repository.
Hop you find it useful!

value: Show HN: ASCII Tree Editor

author: novoreorx

title: Show HN: ASCII Tree Editor


value: yanaimngvov

value:
Hey HN,
Like many of you, I've been building RAG pipelines recently, and constantly hit a wall at the very first step: getting clean, structured Markdown from PDFs.
I found myself in a loop of "environment hell"—spinning up different Conda environments to test Marker, then PP-StructureV3, then MinerU, just to see which one worked best for a specific paper or financial report. It was a massive time sink. Static leaderboards weren't much help, because they don't tell you how a model will perform on your specific, messy document.
So, I built the tool I wished I had. It's a simple web utility that I call an "OCR Arena."
You can try it here: https://fast360.xyz
The idea is simple: upload a document, select from a lineup of 7 leading open-source models, and it runs them all in parallel, showing you the results side-by-side. The goal is to get you from "which parser should I use?" to having the best possible Markdown in under a minute.
It's completely free, and I made sure there's no login/signup required so you can try it with zero friction. Here’s a quick GIF of the workflow:
https://github.com/shijincai/fast360/blob/main/nologin.gif
The tech stack is a pretty standard setup: Next.js/React on the frontend, a Node.js/Express backend acting as a BFF, and a Python service that manages the model execution via a Redis/BullMQ queue.
This is a web service, not an open-source project, but I've set up a public GitHub repo to act as an information hub, a place to track community feedback, and to share more about the tech. You can find that here:
GitHub: https://github.com/shijincai/fast360
I built this to solve my own problem, but I'm hoping it might be useful to some of you as well. I'll be here all day to answer any questions and listen to your thoughts.

value: Show HN: Fast360 – A web tool to benchmark open-source OCR models side-by-side

author: yanaimngvov


value: abouhmad

value: Show HN: I built an app that turns random fridge items into real meals

author: abouhmad


value: Brysonbw

value:
I started this non-profit organization in January, which I submitted under `Show HN`: https://news.ycombinator.com/item?id=42678785.
At first it had hacker news type features but after a few months I pivoted to have it just be an online community: https://discord.gg/HM5tZPhxg5.
Also, I created a GitHub organization to host project/repos that fall under the mission and purpose of Code Cause: https://github.com/Code-Cause-Collective.
Feel free to join the Discord community. I have several projects lined up to build that’ll be hosted under the organization. I’ll share those projects here too and hopefully some of you might find it interesting enough to contribute.
Also, feel free to follow the GitHub organization, leave a start on the main site repo - https://github.com/Code-Cause-Collective/codecause.dev, and/or leave feedback here.

value: Show HN: Code Cause Collective – Devs creating solutions for humanity

author: Brysonbw


value: oopismcgoopis

value:
For the past few months, I've poured all my energy into building something I'm incredibly passionate about: SamwiseOS, a completely in-browser, AI-first operating system.
What is it?
SamwiseOS is a persistent, single-page web app that looks and feels like a real operating system, complete with a terminal, a robust virtual filesystem (that saves to your browser's IndexedDB), user/group management, and even graphical applications.
The twist? The entire core logic—filesystem, command execution, user management, everything—runs on a Python kernel powered by Pyodide (WebAssembly). The JS frontend acts as a "Stage Manager," handling the UI, sound, and other browser APIs, while the Python kernel is the single source of truth. They talk to each other through a simple effect contract, which is a fancy way of saying they're best friends who communicate really, really well.
Why did I build this?
I wanted to explore what a truly AI-first OS would feel like. Instead of just a command line, you can interact with SamwiseOS through conversation. The gemini command can use system tools to answer questions about your files, forge can generate code for you, and storyboard can analyze a whole directory of code and tell you what it does. It’s like having a brilliant, tireless intern who lives in your browser. It’s the civil servant of operating systems – for the people, by the people (and AI).
Features I'm especially proud of:
Hybrid Kernel: A robust, sandboxed Python kernel running in WASM, with a nimble JavaScript frontend. It's the best of both worlds!
AI-Powered Shell: Use commands like gemini, chidi, and forge to interact with the OS using natural language.
100+ POSIX-like Commands: We've got everything from ls, grep, and awk to sudo, chmod, and useradd. It's a real, functional environment.
GUI Apps: It's not just a terminal! Use edit for a text/code editor, paint for an ASCII art editor, top for a process viewer, chidi to analyze documents, and even adventure to play text-based games.
Persistence: Your session, files, users, and command history are all saved in IndexedDB, so you can pick up right where you left off.
Multi-User & Permissions: A full-fledged user and group system, including a virtual /etc/sudoers file and sudo capabilities.
The project is entirely self-contained and runs offline.
I've had an absolute blast building this, and I'm bursting with ideas for the future (check out the roadmap in the README!). I would be honored if you'd take a look, poke around the filesystem, and let me know what you think.

value: Show HN: SamwiseOS – A web-based, AI-first OS with a Python kernel in Pyodide

author: oopismcgoopis


value: argrau

value:
I kept editing aliases by hand, so I made Alias Manager, a tiny macOS app to view, add, and edit Git aliases and shell aliases quickly. Built in spare moments in airports and cafes, kept the scope small.
Status: beta. macOS build is signed and notarized. PRs welcome. The icon is intentionally temporary.
Happy to hear feedback on features and UX.

value: Show HN: Alias Manager, tiny macOS app to manage Git aliases and shell aliases

author: argrau


value: Show HN: Ohyaml.wtf – A YAML trivia to make you go WTF


value: creasac

value: Show HN: Frende – Private Offline Interpreter

author: creasac


value: Show HN: RinaWarp Terminal – AI-integrated terminal with sub-second responses"


value: Convert WebM to MP4 online free. Fast, secure video converter with no upload required. Professional quality results in your browser.

value: Show HN: WebM to MP4 Converter browser-based


value: samdychen

value: Show HN: A tool to discover rapidly rising AI open source projects

author: samdychen


value: arunbhatia

value:
Hi HN,
I’ve been building www.founderly.xyz — a tool to help founders turn ideas into actual products.
The problem: a lot of people have startup ideas but get stuck because they don’t have a technical cofounder or the resources to hire one.
The approach: Founderly acts like an AI cofounder. Instead of being just one “assistant,” it spins up domain-specific agents (tech, design, marketing, legal) to guide you at different stages:
 • From rough idea → actionable plan
 • Plan → MVP
 • MVP → launch and early traction
We are opening early access soon. If you’re curious, you can join the waitlist here: www.founderly.xyz
I would love feedback from this community — especially around whether you see this as actually useful, and what would make it genuinely valuable to someone starting from scratch.

value: Show HN: Founderly – an AI cofounder to take you from idea to launch

author: arunbhatia


value: Show HN: I used LLMs to build an OS AI voice agent that guarantees accurate data


value: rakag

value: Unsatisfied with the AI journaling tools out there and scared of data leaks, a friend and I made re:memo during a 30 hour hackathon: an LLM assisted journaling app that is designed to run offline!<p>There's still a lot of work to be done, but I've been using it for myself and I'm glad I don't have to send my entire life story to an LLM inference API :)

value: Show HN: We made a local-first LLM assisted journaling tool

author: rakag


value: lukaesch

value:
Hey HN! I built RemoteMCPList (https://remotemcplist.com) because I was frustrated by the lack of a proper registry for Model Context Protocol servers.
With Anthropic and OpenAI both pushing MCP as a way to extend AI capabilities, but neither providing a comprehensive directory of available servers, I decided to take matters into my own hands.
What is it?
RemoteMCPList is a searchable directory of remote MCP servers. Each listing includes:
Server capabilities (read/write data, OAuth support)
Categories (Development, Data Analysis, Payments, Communication, etc.)
Quick descriptions of what each server does
Integration details
Why I built this:
I kept discovering amazing MCP servers scattered across GitHub, random blog posts, and Twitter threads. There was no central place to find them all. As someone building with MCP, I wanted a single source of truth for what's available.
Current features:
50+ servers cataloged and growing
Filterable by category and capabilities
Community submissions via GitHub
Clean, fast interface (no JS framework bloat)
Technical details:
Static site for speed
Open source contributions welcome
Planning to add: installation guides, user reviews, and compatibility matrices
I'm actively adding new servers as I discover them. If you've built an MCP server or know of one that's missing, please submit it!
Would love to hear your thoughts on what features would make this more useful for the community. Are you using MCP? What servers would you like to see added?

value: Show HN: RemoteMCPList – A community directory for MCP servers

author: lukaesch


value:
Hei,
I launched FirstUser app: the idea is that if you want to get feedback (reviews, constructive criticism) for your app, then you first must give feedback on other products. You then earn Karma and can spend it to receive feedback.
Since last week there have been 20 launches and 80 reviews. That’s 4 reviews for each launch on average!
Let me know what you think!

value: Show HN: FirstUser trying to give 4 guaranteed reviews for each product