Show HN Daily Selection (2025-09-08)
- I'm a dermatologist and I vibe coded a skin cancer learning app
- OpenCV over WebRTC (in Go)
- Lightweight tool for managing Linux virtual machines
- Semantic grep with local embeddings
- I recreated Windows XP as my portfolio
- Psq – CLI for Postgres Monitoring
- Vizzly – Visual testing platform with built-in review workflows
- A livestream of all image descriptions (alt text) on Bluesky
- Infinipedia – An infinite, self‑writing, self‑optimizing wiki
- GitType – A typing game that uses your own Git repo as practice text
- LLM wrapped around stocks and crypto
- Userscript to enhance HN with favicons and hidden sections links
- Blockchain that mines blocks with real achievements, not math puzzles
- "All Bitcoin transactions are JPEGs"
I'm a dermatologist and I vibe coded a skin cancer learning app [Health]
308 points, 201 comments
A dermatologist-created skin cancer learning app built with Gemini Pro 2.5 in a few hours.
- Developed using Vanilla JS with all code in a single HTML/JS/CSS file
- No backend; scores saved via localStorage
- Deployed on a £5 Digital Ocean server (could use static hosting)
- Images and metadata stored in AWS S3
Discussion Link, Original Link
OpenCV over WebRTC (in Go) [Developer Tools]
10 points, 0 comments
OpenCV video processing over WebRTC implemented in Go.
- Uses OpenCV for computer vision tasks
- Streams video via WebRTC
- Implemented in Go for performance and concurrency
Discussion Link, Original Link
Lightweight tool for managing Linux virtual machines [Developer Tools]
126 points, 30 comments
Lightweight tool for managing Linux virtual machines with minimal dependencies.
- Basic VM creation with cloud-init support
- Lifecycle management and image/storage handling
- Modern, embedded web UI, CLI, and API
- Small 8.4MB binary with only libvirt as a dependency
Discussion Link, Original Link
Semantic grep with local embeddings [Developer Tools]
157 points, 70 comments
Semantic grep tool using local embeddings for code search.
- Uses local embeddings for semantic search
- Enables grep-like functionality with semantic understanding
- Works offline without external dependencies
Discussion Link, Original Link
I recreated Windows XP as my portfolio [Design]
920 points, 296 comments
A fully functional Windows XP recreation in the browser, built from scratch with AI assistance as a learning project.
- Built entirely from original code (except basic libraries) to learn coding and AI collaboration
- Includes sounds, animations, and working applications for a complete XP experience
- Optimized for mobile touchscreens while maintaining authenticity
- Developed with zero prior coding knowledge, using AI as a learning tool
Discussion Link, Original Link
Psq – CLI for Postgres Monitoring [Developer Tools]
4 points, 0 comments
Postgres monitoring tool via CLI.
- CLI-based interface
- Monitors Postgres databases
- Lightweight and command-line focused
Discussion Link, Original Link
Vizzly – Visual testing platform with built-in review workflows [Design]
6 points, 0 comments
Vizzly is a visual testing platform with built-in review workflows to ensure designs match implementations accurately.
- Uses actual screenshots (not DOM re-renders) for accurate visual testing, including PDFs
- Built-in collaboration tools like reviewer assignment, approvals, and screenshot-level threads
- Supports automatic (Git-aware), manual, or hybrid baselines
- Local TDD + CI parity for consistent testing across environments
- Custom properties for filtering reviews (component, viewport, theme, etc.)
- Team-based pricing with a generous free plan for OSS and on-prem availability
Discussion Link, Original Link
A livestream of all image descriptions (alt text) on Bluesky [Image]
3 points, 2 comments
A livestream showcasing image descriptions (alt text) from Bluesky posts, revealing trends in usage and content types.
- Tracks frequency and types of image descriptions on Bluesky in real-time.
- Highlights prevalence of bot content like ADS-B feeds and affiliate spam.
- Notes surprising volume of detailed descriptions for sexual content.
Discussion Link, Original Link
Infinipedia – An infinite, self‑writing, self‑optimizing wiki [Text]
7 points, 1 comments
An infinite, self-writing, self-optimizing wiki.
- Self-writing content generation
- Continuous self-optimization
- Infinite expansion capability
Discussion Link, Original Link
GitType – A typing game that uses your own Git repo as practice text [Developer Tools]
5 points, 0 comments
A typing game that uses your own Git repository as practice material for improving typing skills with real code.
- Terminal-based CLI tool built in Rust
- Uses actual code, functions, and comments from your local Git repo
- Tracks typing speed (WPM) and accuracy
- Maintains history of past runs for progress tracking
- Includes fun ranking titles based on performance
Discussion Link, Original Link
LLM wrapped around stocks and crypto [Finance]
4 points, 0 comments
AI-powered stock and crypto analysis tool.
- Analyzes stocks and cryptocurrencies
- Uses LLM (Large Language Model) technology
- Provides insights or predictions on market trends
Discussion Link, Original Link
Userscript to enhance HN with favicons and hidden sections links [Developer Tools]
3 points, 1 comments
Show HN userscript adds favicons and hidden section links to Hacker News.
- Adds favicons next to post titles for visual recognition
- Includes links to hidden sections like "ask" and "show"
- Enhances usability without altering core functionality
Discussion Link, Original Link
Blockchain that mines blocks with real achievements, not math puzzles [Consumer Tech]
4 points, 0 comments
A blockchain that replaces computational mining with real-world achievements, verified by AI and peer review.
- Mines blocks by submitting real-world achievements (e.g., fitness, learning) with photo evidence
- AI validates authenticity and difficulty, followed by community peer review
- Earns AwesomeCoins as rewards, permanently recorded on-chain
- Built with React + MUI frontend, Node.js + MongoDB backend
- No crypto speculation or fees—focuses on human accomplishments
- Open-source (GitHub available)
"All Bitcoin transactions are JPEGs" [Image]
4 points, 0 comments
Bitcoin transactions visualized as unique JPEG artworks.
- Converts Bitcoin transaction data into visual art
- Explores the artistic potential of blockchain patterns
- Subjective interpretation of value and art in data
- Interactive website for generating transaction-based images