Show HN Daily Selection (2025-04-20)
- I built an AI that turns GitHub codebases into easy tutorials
- Goldbach Conjecture up to 410^18+710^13
- Undercutf1 – F1 Live Timing TUI with Driver Tracker, Variable Delay
- Web Video editor, 100% local, AI subtitle, auto cut based on volume
- Parqv – Interactive TUI Parquet Visualizer
- LettuceDetect – Lightweight hallucination detector for RAG pipelines
- DeadDrop – Tiny tool to share files anonymously
- I built a tool to find pain points in questions and generate SaaS ideas
- Make your bookmarks smarter with AI
- i built an AI code reviewer for github (used it on itself during dev)
- CR4SH3R – Fast WordPress Plugin Vulnerability Scanner
- I made an app to get Paraguay residency and citizenship
- Flight search that shows aircraft and airline safety records
I built an AI that turns GitHub codebases into easy tutorials [Education]
42 points, 13 comments
AI tool that converts GitHub codebases into simplified tutorials.
- Transforms complex codebases into beginner-friendly tutorials
- Automates documentation and learning material creation
- Integrates with GitHub repositories directly
Discussion Link, Original Link
Goldbach Conjecture up to 410^18+710^13 [Research]
221 points, 122 comments
Verified the Goldbach Conjecture up to 4×10¹⁸ + 7×10¹³ using a cloud-based distributed computing system.
- Achieved a new world record in verifying the Goldbach Conjecture
- Uses Gridbach, a cloud-based distributed computing system
- Accessible from any PC or smartphone without login or app installation
- Runs high-performance WASM binary code in the browser
- Enables computation directly on the user’s browser
Discussion Link, Original Link
Undercutf1 – F1 Live Timing TUI with Driver Tracker, Variable Delay [Entertainment]
255 points, 63 comments
A terminal-based F1 live timing app with detailed race data and customizable delay for syncing with TV broadcasts.
- Provides live timing data including Driver Tracker, Timing Tower, and Race Control
- Supports replaying past races with simulated sessions
- Allows adjusting timing feed delay to sync with TV broadcasts
- Works best in a 110x30 terminal for optimal readability
- Includes detailed analysis like lap and gap history for strategy insights
Discussion Link, Original Link
Web Video editor, 100% local, AI subtitle, auto cut based on volume [Video]
8 points, 0 comments
A web-based video editor that runs locally, automatically cuts silent parts, and generates subtitles for faster content creation and lecture review.
- 100% local processing, no cloud dependency
- Automatically cuts silent sections to shorten videos
- AI-powered subtitle generation
- No rendering required, instant playback
- Useful for lectures, meetings, and content creation
- Compatible with further editing in DaVinci Resolve
Discussion Link, Original Link
Parqv – Interactive TUI Parquet Visualizer [Developer Tools]
13 points, 6 comments
Interactive TUI for visualizing Parquet files.
- Terminal-based user interface
- Visualizes Parquet file contents
- Interactive exploration of data
- Supports Parquet file format
Discussion Link, Original Link
LettuceDetect – Lightweight hallucination detector for RAG pipelines [Developer Tools]
5 points, 0 comments
LettuceDetect is an open-source, encoder-only framework for detecting hallucinated spans in LLM-generated answers without requiring full LLM inference.
- Token-level hallucination detection based on retrieved evidence
- Built on ModernBERT, handling up to 4K token contexts
- Achieves 79.22% F1 on the RAGTruth benchmark
- MIT licensed with Python packages, pretrained models, and Hugging Face demo
- More efficient than LLM-based detectors
Discussion Link, Original Link
DeadDrop – Tiny tool to share files anonymously [Productivity]
17 points, 19 comments
DeadDrop is a tiny tool for sharing files anonymously.
- Anonymous file sharing
- Minimalist and lightweight
- No registration or setup required
Discussion Link, Original Link
I built a tool to find pain points in questions and generate SaaS ideas [Business]
5 points, 2 comments
A tool to identify pain points in questions and generate SaaS ideas.
- Analyzes questions to find pain points
- Generates SaaS business ideas based on identified pain points
Discussion Link, Original Link
Make your bookmarks smarter with AI [Productivity]
7 points, 7 comments
AI-powered bookmark enhancement tool.
- Uses AI to organize and improve bookmarks
- Helps users manage saved content more effectively
Discussion Link, Original Link
i built an AI code reviewer for github (used it on itself during dev) [Developer Tools]
3 points, 4 comments
AI-powered GitHub code reviewer for solo developers, providing structured feedback via OpenAI.
- Automatically reviews pull requests with LLM-generated comments
- Designed for solo developers to improve code quality without human reviewers
- Plans to expand with multiple model integrations (Claude, Gemini, etc.)
- Future features include BYOM, repo memory, and custom rules
- Self-tested during development to refine functionality
Discussion Link, Original Link
CR4SH3R – Fast WordPress Plugin Vulnerability Scanner [Developer Tools]
3 points, 0 comments
Fast WordPress plugin vulnerability scanner for detecting Arbitrary File Download flaws.
- Lightning-fast multi-threaded scanning
- Extracts credentials from exposed files (e.g., wp-config.php)
- Generates actionable Excel reports
- Simple GUI for one-click security checks
Discussion Link, Original Link
I made an app to get Paraguay residency and citizenship [Travel]
5 points, 0 comments
CitizenPY simplifies the process of obtaining Paraguay residency and citizenship by guiding users through eligibility and cost-saving options.
- Systematizes and simplifies the citizenship process
- Determines eligibility and provides tailored paths
- Offers tips to skip queues and reduce costs
- Connects users with trusted partners
Discussion Link, Original Link
Flight search that shows aircraft and airline safety records [Travel]
3 points, 0 comments
A flight safety search tool that helps users check detailed safety records of airlines and aircraft before booking.
- Provides safety records for specific airlines and aircraft models
- Aims to help users make informed flight booking decisions
- Future plans include adding verified pilot profiles with experience and safety records