Show HN Daily Selection (2025-05-15)
- Muscle-Mem, a behavior cache for AI agents
- Semantic Calculator (king-man+woman=?)
- Lumier – Run macOS VMs in a Docker
- CSV GB+ by Data.olllo – Open and Process CSVs Locally
- Doxxer – CLI tool for dynamic SemVer versioning using tags
- acmsg (automated commit message generator)
- Family Folder – Help your family remember everything, organise anything
- Build a free linktree alternative that skips in-app-browsers
- LTXV 13B Distilled – Generate 5s Videos in Under 10s
- Horochan – a fast, minimalist daily horoscope site (no ads,no tracking)
- BrandMyApp – Complete brand identity in minutes for your startup
- StealthCoder – Invisible AI helper for coding interviews
- You know browser-use, here's human-use for LLMs to get info from humans
- I've added 59 free tools to work with PDF documents
- I built a simple AI-powered ATS for small teams
- Superchange.ai – AI-native changelog, stay updated on what YOU build on
- Convert existing agent projects from different framewrks to A2A servers
- Datasleuth – LLM-powered research pipelines to structured results (TS)
Muscle-Mem, a behavior cache for AI agents [Developer Tools]
116 points, 32 comments
Muscle-Mem is an SDK that caches and replays AI agent behaviors for repetitive tasks while falling back to agent mode for edge cases.
- Records and replays tool-calling patterns for efficiency
- Switches between script-based execution and agent-based handling dynamically
- Designed for automation in dynamic environments
- Reduces LLM costs and latency for repetitive workflows
- Generalizes beyond computer-use cases to various automations
Discussion Link, Original Link
Semantic Calculator (king-man+woman=?) [Research]
70 points, 94 comments
A semantic calculator that explores word embeddings through addition/subtraction operations and ranks results by similarity.
- Uses word embeddings to perform semantic operations like "king - man + woman = queen"
- Ranks results by distance/cosine similarity instead of just top matches
- Currently supports only nouns and some proper nouns, with case sensitivity
- Focuses on the most common interpretations of homographs
Discussion Link, Original Link
Lumier – Run macOS VMs in a Docker [Developer Tools]
106 points, 36 comments
Lumier is an open-source tool for running macOS and Linux VMs in Docker containers on Apple Silicon Macs, leveraging native virtualization.
- Runs macOS VMs in Docker containers on Apple Silicon (M1/M2/M3/M4)
- Uses Apple's Virtualization Framework for hardware acceleration
- Provides web-based VNC access to VMs
- Supports persistent storage or ephemeral mode
- Enables file sharing between host and VM
- Automates VM startup with custom scripts
- Open-source under MIT license
Discussion Link, Original Link
CSV GB+ by Data.olllo – Open and Process CSVs Locally [Developer Tools]
41 points, 13 comments
A local data tool for opening, cleaning, and exporting gigabyte-sized CSVs without coding.
- Handles massive CSVs (billions of rows) with merge, split, dedup, and filter operations
- Dual backends: memory-optimized ("P Core") or disk-backed ("V Core") for performance flexibility
- Fully offline processing with no data upload or telemetry
- Supports multiple formats (CSV, XLSX, JSON, DBF, Parquet)
- Designed for data professionals, students, and privacy-conscious users
- Free trial available with pro version unlocking full features and removing row limits
Discussion Link, Original Link
Doxxer – CLI tool for dynamic SemVer versioning using tags [Developer Tools]
5 points, 0 comments
A CLI tool for dynamic SemVer versioning using Git tags, written in Rust.
- Extracts and calculates current/upcoming semantic versions from Git tags
- Inspired by
git describe --tagsbut ensures SemVer compliance - Single binary with predictable output
- Currently requires installation via Cargo (pre-built binaries planned)
Discussion Link, Original Link
acmsg (automated commit message generator) [Developer Tools]
12 points, 18 comments
Automated CLI tool for generating AI-powered commit messages from staged changes using OpenRouter API.
- Generates commit messages based on staged changes
- Uses AI models via OpenRouter API
- Written in Python
- Command-line interface (CLI) tool
Discussion Link, Original Link
Family Folder – Help your family remember everything, organise anything [Life Assistant]
4 points, 4 comments
A family organization tool to simplify planning, stay connected, and manage shared information.
- Designed specifically for families to handle logistics, memories, and documents
- Private by design, with access limited to invited members
- Built with Ruby on Rails, PostgreSQL, and hosted on Heroku
- Supports file uploads via S3 storage
- Planned iOS app and AI assistant coming soon
Discussion Link, Original Link
Build a free linktree alternative that skips in-app-browsers [E-commerce]
4 points, 2 comments
Free Linktree alternative that bypasses in-app browsers.
- Skips social media in-app browsers for direct links
- No cost to run, free for all users
- Account-free link conversion available
- Built with Next.js and MongoDB
- No "Vibe-Coded" development
Discussion Link, Original Link
LTXV 13B Distilled – Generate 5s Videos in Under 10s [Video]
7 points, 1 comments
LTXV 13B Distilled is an open-source video generation model that produces 5-second 720p videos in under 10 seconds on an H100 GPU.
- Generates 5s videos in ~9.5s on H100 and ~1.5min on RTX 5090
- Offers three rendering pipelines (Distilled, Mixed, Base) for speed-quality tradeoffs
- Compatible with multiscale rendering for lower-res previews and upscaling
- Open-source with GitHub, Hugging Face, and ComfyUI integrations
- Supports rapid iteration and experimentation with fast generation speeds
Discussion Link, Original Link
Horochan – a fast, minimalist daily horoscope site (no ads,no tracking) [Life Assistant]
3 points, 2 comments
A fast, minimalist daily horoscope site with no ads or tracking.
- Loads in under 100ms
- No cookies, analytics, or distractions
- One plain-English daily horoscope
- Calming, human-centric design
- Built with static front-end + serverless backend (Vercel)
BrandMyApp – Complete brand identity in minutes for your startup [Design]
4 points, 4 comments
BrandMyApp helps founders quickly create professional branding for MVPs using AI and design expertise.
- Generates multiple logo options with variations for different contexts
- Provides industry-specific color palettes based on color psychology
- Offers typography systems matching brand voice
- Includes UI component previews for real interface visualization
- Delivers AI-ready asset packages with JSON-formatted brand guidelines
- One-time payments starting at $9.99
- No login required to explore examples
StealthCoder – Invisible AI helper for coding interviews [Developer Tools]
3 points, 2 comments
An invisible AI overlay that helps developers discreetly during coding interviews by providing hints without detection.
- Undetectable on Zoom/Meet and cheat detection systems
- Provides in-place Data Structures & Algorithm hints via Ctrl+Alt+S
- Runs silently with no extra windows or icons
- Tested successfully in live interview rounds with screenshare
- Available for Windows and Mac (unsigned builds currently)
You know browser-use, here's human-use for LLMs to get info from humans [Research]
3 points, 3 comments
LLM-powered tool that connects AI agents to real-time human feedback via Rapidata API.
- Enables crowdsourcing human insights for preference research, hallucination checks, sentiment capture, and feedback
- Free to use with customizable human interaction needs
- Integrates with Rapidata API through MCP server framework and provides a custom client
Discussion Link, Original Link
I've added 59 free tools to work with PDF documents [Productivity]
3 points, 4 comments
DigiParser offers 59 free browser-based PDF tools for merging, splitting, converting, and more.
- Merge, split, compress, and convert PDFs to Word, Excel, JPG, etc.
- Includes OCR, redaction, form filling, signing, and page reordering
- No login required, privacy-friendly, and works entirely in the browser
Discussion Link, Original Link
I built a simple AI-powered ATS for small teams [Business]
3 points, 0 comments
AI-powered applicant tracking system for small teams with no complex setup.
- Automates resume intake
- Uses AI for intelligent screening
- Clean, intuitive interface for tracking candidates
- No training or complex setup required
Discussion Link, Original Link
Superchange.ai – AI-native changelog, stay updated on what YOU build on [Developer Tools]
5 points, 0 comments
AI-native changelog aggregator to track updates from tech providers in one feed.
- Open-source and MIT-licensed
- Free to use
- API and client available
- Helps developers stay in sync with fast-moving API changes
- Early users report reduced panic from unexpected updates
Discussion Link, Original Link
Convert existing agent projects from different framewrks to A2A servers [Developer Tools]
10 points, 0 comments
Convert existing agent projects from various frameworks into A2A servers effortlessly with AutoA2A.
- Deploys agents built with CrewAI, LangGraph, LlamaIndex, OpenAI’s Agents SDK, or Pydantic AI as A2A servers
- No need to modify existing project code—just add the AutoA2A library and run the CLI
- Scaffolds the project into an A2A server with minimal configuration
- Supports local deployment or one-click hosting on a demo platform
- Provides a hosted URL for seamless integration with A2A clients like Cursor
Discussion Link, Original Link
Datasleuth – LLM-powered research pipelines to structured results (TS) [Research]
3 points, 0 comments
LLM-powered research pipelines to structured results
- Uses LLM for research automation
- Converts research into structured data
- Built with TypeScript