Show HN Daily Selection (2025-05-29)
- I rewrote my Mac Electron app in Rust
- Tesseral – Open-Source Auth
- AutoThink – Boosts local LLM performance with adaptive reasoning
- Loodio 2 – A Simple Rechargable Bathroom Privacy Device
- Wetlands – a lightweight Python library for managing Conda environments
- European Accessibility Act – Simple CLI Checker
- Voiden – a free, offline, Git-native API Client
- Octogen: e-commerce capabilities for agents
- Every problem and solution in Beyond Cracking the Coding Interview
- Burner Bitcoin – a simple hardware wallet for gifting Bitcoin
- PondPilot Widget – Interactive SQL snippets for any website
- 3DGS implementation in Nvidia Warp: clean, minimal, runs on CPU and GPU
- Puck – Open-source visual editor for React
- Termitty – Open Source Terminal Automation Framework (Selenium for SSH)
- TorusKit – Web Animations Right in HTML
- Connecting People Through AI-Powered Video Sentiment Matching
- Tired of overpriced SEO tools? I built SEOzast for the price of coffee
I rewrote my Mac Electron app in Rust [Developer Tools]
365 points, 270 comments
Rewrote a Mac Electron app in Rust and Tauri, resulting in significant performance improvements and stability.
- App size reduced by 83% (1GB → 172MB)
- DMG installer size reduced by 70% (232MB → 69.5MB)
- Indexing files is 3-5x faster
- Improved stability (no more random crashes)
- Cleaner, simpler UI after rebuild
- Rust handles image/video processing and file I/O more efficiently
- Bundled Redis for vector storage and search
Discussion Link, Original Link
Tesseral – Open-Source Auth [Developer Tools]
122 points, 47 comments
Tesseral is an open-source authentication solution designed specifically for B2B SaaS applications, offering enterprise-ready features with simplicity for developers.
- Open-source alternative to Auth0 or Clerk for B2B apps
- Supports multi-tenancy, SAML SSO, MFA, SCIM provisioning, and RBAC
- Manages API keys with RBAC-based scoping
- Designed for security without requiring deep expertise
- Self-hostable or available as a hosted service
- Early-stage project with ongoing feature and documentation improvements
Discussion Link, Original Link
AutoThink – Boosts local LLM performance with adaptive reasoning [Developer Tools]
382 points, 62 comments
AutoThink improves local LLM performance by dynamically allocating computational resources based on query complexity and using steering vectors for better reasoning.
- Adaptively allocates thinking tokens (70-90% for complex queries, 20-40% for simple ones)
- Uses Pivotal Token Search-derived steering vectors to enhance numerical accuracy, self-correction, and exploration
- Achieves significant performance gains (e.g., +43% on GPQA-Diamond benchmark)
- Compatible with various local models (DeepSeek, Qwen, custom fine-tuned) without API dependencies
- Includes open-source implementation and adaptive classification framework for new complexity categories
Loodio 2 – A Simple Rechargable Bathroom Privacy Device [Consumer Tech]
57 points, 61 comments
A motion-activated music player for bathrooms that provides privacy and displays time/weather.
- Rechargeable battery with 1-week battery life (~5 hours active use)
- SD card support for easy music upload (4GB included)
- No app or WiFi required (optional features like internet radio need WiFi)
- Displays time and weather for convenience
- Compact design with improved sound quality compared to the previous version
- 25 hardware iterations to optimize performance and usability
Discussion Link, Original Link
Wetlands – a lightweight Python library for managing Conda environments [Developer Tools]
27 points, 36 comments
A lightweight Python library for managing Conda environments to avoid dependency conflicts in plugin systems.
- Simplifies creation of isolated Conda environments with specific dependencies
- Allows running arbitrary Python code within environments and retrieving results
- Uses multiprocessing.connection and pickle for inter-process communication
- Supports shared memory between environments for efficient data exchange
Discussion Link, Original Link
European Accessibility Act – Simple CLI Checker [Developer Tools]
3 points, 0 comments
European Accessibility Act – Simple CLI Checker
- CLI tool for checking compliance with the European Accessibility Act
- Simple and easy to use
- Focuses on accessibility standards
Discussion Link, Original Link
Voiden – a free, offline, Git-native API Client [Developer Tools]
71 points, 61 comments
A free, offline, Git-native API client that keeps API definitions, docs, and tests together in markdown files.
- Offline-first with no login, telemetry, or cloud lock-in
- Git-integrated for version control and collaboration
- Combines API specs, docs, and tests in a single source of truth
- Minimalist UI with hotkey-driven workflow
- Built-in terminal for direct Git operations
- Free core with optional future plugins
Discussion Link, Original Link
Octogen: e-commerce capabilities for agents [E-commerce]
5 points, 0 comments
Octogen provides unified e-commerce capabilities for AI agents, enabling seamless product search and checkout across diverse platforms.
- Unified product catalog with a common schema for LLM-style search across hundreds of sites
- Agentic checkout using virtual cards for faster transactions
- Autonomous processing for adding new stores (~95% automated)
- Supports RAG-based product search with rich attribute awareness
- Expanding support for additional payment methods (in development)
Discussion Link, Original Link
Every problem and solution in Beyond Cracking the Coding Interview [Education]
5 points, 1 comments
Free access to ~230 coding problems and solutions from "Beyond Cracking the Coding Interview," including an AI Interviewer for practice.
- Includes classic and new problems not found in the original CTCI
- AI Interviewer allows customizable practice by topic and difficulty
- Solutions available for reading or interactive practice
- Requires free account creation for access
Burner Bitcoin – a simple hardware wallet for gifting Bitcoin [Finance]
11 points, 0 comments
A simple, low-cost hardware wallet for gifting Bitcoin and Ethereum, operating via smartphone browser and NFC.
- Card-sized wallet with secure element chip and NFC capabilities
- No seed phrases or private key management required
- Bitcoin and Ethereum versions available as separate products
- Directly signs transactions with internal private key (never revealed in plaintext)
- Open libraries for offline transaction signing and cold storage
- Designed for easy gifting and small cryptocurrency purchases
Discussion Link, Original Link
PondPilot Widget – Interactive SQL snippets for any website [Developer Tools]
5 points, 0 comments
PondPilot Widget turns SQL code blocks into interactive query editors with DuckDB WASM, requiring no backend.
- Full SQL analytics engine (DuckDB) running client-side
- Syntax highlighting with live editing
- One-click query execution (or Ctrl+Enter)
- Works with any static site – just add the CDN script
- Only 23KB minified, loads DuckDB on-demand
- Dark/light theme support
Discussion Link, Original Link
3DGS implementation in Nvidia Warp: clean, minimal, runs on CPU and GPU [Developer Tools]
12 points, 1 comments
A clean, minimal 3D Gaussian Splatting implementation in Nvidia Warp that runs on both CPU and GPU with educational clarity.
- Runs seamlessly on CPU and GPU without CUDA setup or device-specific kernels
- Simplifies learning differentiable rendering and parallel graphics programming
- Minimalist, hackable codebase ideal for study, prototyping, or teaching Gaussian Splatting
Discussion Link, Original Link
Puck – Open-source visual editor for React [Developer Tools]
26 points, 10 comments
Open-source visual editor for React that integrates with any backend or CMS.
- Multi-column drag-and-drop with full CSS layout support (Grid, Flexbox, etc)
- Viewport previewing
- Headless mode for completely custom interfaces
- Permissions API to lock down authoring behavior
- Dynamic fields that adapt based on data
Discussion Link, Original Link
Termitty – Open Source Terminal Automation Framework (Selenium for SSH) [Developer Tools]
5 points, 0 comments
Termitty is an open-source terminal automation framework that brings Selenium-like patterns to SSH by maintaining a virtual terminal buffer for reliable automation.
- Maintains persistent SSH connections in a pool
- Tracks terminal state, including cursor position and ANSI codes
- Supports session recording with JSON/asciinema format and replay UI
- Enables interactive shell control for tools like vim and top
- Provides real wait conditions (no sleep-based delays)
- Integrates with LLMs for intelligent terminal automation decisions
Discussion Link, Original Link
TorusKit – Web Animations Right in HTML [Design]
3 points, 0 comments
TorusKit is a JavaScript library for creating web animations directly in HTML using simple data attributes.
- Uses
[data-tor]attributes for low-code animation syntax - Supports animations, chaining, scroll-based effects, and mouse-follow interactions
- Includes stagger and group animations
- Works well with WordPress, Bootstrap, and static sites
- Svelte support coming soon
- Functional and stable for small/medium sites
Discussion Link, Original Link
Connecting People Through AI-Powered Video Sentiment Matching [Health]
11 points, 7 comments
A peer support network that connects people through AI-powered sentiment analysis of self-recorded videos.
- Uses short videos (intro, mental health journey, likes/dislikes) for user profiles
- Analyzes emotional tone, themes, and psychological markers using LLMs
- Matches users based on shared experiences and emotional alignment
- Focuses on creating a safe, empathetic space for mental health support
Discussion Link, Original Link
Tired of overpriced SEO tools? I built SEOzast for the price of coffee [Marketing]
3 points, 2 comments
SEOzast is an affordable AI-powered SEO tool that generates 1000-word articles with real backlinks for indie hackers and solo founders.
- Generates AI-written SEO articles with real backlinks from your site
- Analyzes sites to create titles, descriptions, and topics automatically
- Handles H1 tags, meta descriptions, internal linking, and deployment to GitHub
- Supports markdown or React (TSX/JSX) output with images from Pexels
- Runs on Next.js with OpenAI, hosted affordably (less than a coffee/month)