Show HN Daily Selection (2025-05-27)
- PgDog – Shard Postgres without extensions
- AI for Building Design, Planning, and Permitting
- A minimalist web timer for focus and time tracking
- CodeNow – CoderPad over WebRTC and WASM
- Cleaner Markdown lang and static site generator (Shrimple)
- Scholtz – Find customers and users that want your product
- Remove AI Job Spam from Indeed and LinkedIn
- Configurable desktop environment running in the browser
- AI Page Ready – Is Your Website Ready for ChatGPT, Gemini and Claude?
- BufferTab – minimal Markdown editor that lives in the browser's URL
- VexFS – A Kernel-Native Semantic Filesystem for AI Agents
- Personalized Newsletters About Anything
- Actor-Critic MCP Server Helps Your AI Think from Dual Perspectives
- I built an AI image tool solo in 1 month
- Claude Exporter – Save Claude Convos as PDF, Markdown and More
PgDog – Shard Postgres without extensions [Developer Tools]
157 points, 33 comments
PgDog is an open-source Rust-based PostgreSQL proxy enabling sharding without app changes or database extensions.
- Shards PostgreSQL without requiring app modifications or extensions
- Supports cross-shard queries and simple aggregates (max, min, count, sum)
- Works with managed Postgres services like RDS and Cloud SQL
- Multi-threaded, asynchronous architecture for high concurrency
- Includes read/write traffic splitting and load balancing
- Features distributed COPY for seamless bulk data insertion
- Uses Postgres parser for query inspection, blocking, and rewriting
- Optimized for OLTP workloads with minimal memory allocations
- Plans to support resharding via logical replication for zero-downtime scaling
Discussion Link, Original Link
AI for Building Design, Planning, and Permitting [Design]
9 points, 7 comments
AI tool for generating 3D massing and site plans based on local zoning rules.
- Quickly determines buildable options for a given parcel
- Generates 3D massing and site plans in minutes
- Useful for early-stage architecture and development planning
Discussion Link, Original Link
A minimalist web timer for focus and time tracking [Productivity]
82 points, 37 comments
A minimalist, local-only web timer for tracking freelance coding hours and maintaining focus.
- No login required
- Simple and clean interface
- Local-only functionality
- Designed for focus and time tracking
- Currently free with potential future monetization
Discussion Link, Original Link
CodeNow – CoderPad over WebRTC and WASM [Developer Tools]
4 points, 0 comments
CodeNow is a collaborative coding platform using WebRTC and WASM for in-browser execution without server-side code management.
- Uses WebAssembly (WASM) for secure in-browser code execution
- Supports real-time collaboration via WebRTC
- Inspired by Leetcode and CoderPad
- Eliminates need for remote server-side code execution
Discussion Link, Original Link
Cleaner Markdown lang and static site generator (Shrimple) [Developer Tools]
3 points, 7 comments
A Markdown language and static site generator called Shrimple.
- Cleaner Markdown syntax
- Static site generation capability
Discussion Link, Original Link
Scholtz – Find customers and users that want your product [Marketing]
3 points, 4 comments
An AI tool that helps founders find genuine potential customers and users by analyzing their website and identifying interested individuals.
- Scans your website to understand your business
- Identifies people who genuinely care about your product
- Provides direct contact details without spam
- Currently focused on LinkedIn profiles in the U.S. tech industry
- Offers a trial to search for up to 10 individuals
Discussion Link, Original Link
Remove AI Job Spam from Indeed and LinkedIn [Productivity]
3 points, 1 comments
Remove AI Job Spam from Indeed and LinkedIn
- Filters out AI-generated job postings
- Works with Indeed and LinkedIn
- Helps users find genuine job listings
Discussion Link, Original Link
Configurable desktop environment running in the browser [Consumer Tech]
3 points, 2 comments
A configurable desktop environment running entirely in the browser with a file system, apps, and theming, built in vanilla JS.
- Complete desktop environment with functional file system and apps
- Customizable window manager and theming
- Built with vanilla JS, minimal dependencies (only esbuild for bundling)
- Developed as a personal project, initially rewriting a personal website
- Used LLMs for initial app drafts and ideas, focusing on logic and architecture
- Features executable format, permission system, and ad-hoc concepts
- Designed to minimize development friction and encourage continuous iteration
Discussion Link, Original Link
AI Page Ready – Is Your Website Ready for ChatGPT, Gemini and Claude? [Developer Tools]
4 points, 1 comments
A tool to check if web pages are optimized for AI tools like ChatGPT, Gemini, and Claude.
- Runs 40+ checks across six key areas
- Evaluates discoverability, structured data, content quality, and more
- Focuses on AI-specific optimizations for better visibility
- Targets eCommerce, SEO, content, and SaaS users
- Open to feedback and feature suggestions
Discussion Link, Original Link
BufferTab – minimal Markdown editor that lives in the browser's URL [Text]
3 points, 1 comments
Minimal Markdown editor that persists content in the browser's URL for easy sharing and cross-device access.
- Content stored in the URL for easy sharing
- Lightweight scratchpad for quick notes
- Speech-to-text via OpenAI Whisper (requires API key)
- API key stored locally in the browser
Discussion Link, Original Link
VexFS – A Kernel-Native Semantic Filesystem for AI Agents [Developer Tools]
4 points, 3 comments
VexFS is a kernel-native filesystem that integrates vector embeddings and semantic search for AI agents, enabling RAG without a separate vector database.
- Stores vector embeddings alongside files
- Supports semantic search (currently brute-force, future HNSW planned)
- Exposes functionality via IOCTL + mmap interface
- Acts as a semantic memory layer for local AI agents
- Eliminates need for separate vector DB in RAG workflows
- Early-stage prototype with basic functionality
Personalized Newsletters About Anything [Research]
4 points, 3 comments
A service that sends personalized newsletters on niche topics with customizable frequency.
- Automatically curates updates on specified topics
- Customizable delivery frequency (weekly/daily)
- Ideal for niche interests with frequent news
- Designed to save time on trend tracking
Discussion Link, Original Link
Actor-Critic MCP Server Helps Your AI Think from Dual Perspectives [Developer Tools]
3 points, 0 comments
AI server enabling dual-perspective thinking for AI models.
- Uses Actor-Critic architecture
- Supports multi-perspective decision-making
- Designed for AI model enhancement
Discussion Link, Original Link
I built an AI image tool solo in 1 month [Image]
3 points, 4 comments
Styleloop is a solo-built AI tool that transforms images into stylized artworks like Ghibli, pixel art, and Animal Crossing styles.
- Uses AI for image-to-image transformation
- Offers curated artistic styles
- Built with Next.js, Supabase, Stripe, and Cloudflare
- Solo-developed SaaS project
- Plans to add more creative modes
Discussion Link, Original Link
Claude Exporter – Save Claude Convos as PDF, Markdown and More [Productivity]
3 points, 0 comments
A Chrome extension to save Claude AI conversations in multiple formats like PDF, Markdown, and JSON with one-click ease.
- Supports various export formats including PDF, Markdown, Text, CSV, and JSON
- Preserves advanced Claude outputs like artifacts and AI thought processes
- Offers extensive customization options
- Simple and quick to use with just a few clicks