Show HN Daily Selection (2025-07-31)
- Open-source alternative to ChatGPT Agents for browsing
- An AI agent that learns your product and guides your users
- I use AI to send myself personalized weekly recaps from my saved links
- A high-altitude low-power flight computer for high-altitude balloons
- MoebiusXBIN – ASCII and text-mode art editor with custom font support
- OpenAI Agents SDK demos made durable and scalable with Temporal
- Docucod – Automatic documentation for any codebase
- We create visual codebase maps that scale (static analysis and LLMs)
- Docmd – Minimal Markdown documentation generator using Node.js
- Universal Control" for Macintosh Classic
- Print the daily weather forecast on a thermal receipt printer
- Production-Ready Agents with the OpenAI Agents SDK and Temporal
- Building a Production Finance Model for Open Source
- Claude Code in the Browser – Webcode.sh
- We built a framework for sending real-time updates to mobile apps
- Made my own app switcher because ⌘-Tab wasn't cutting it [video]
Open-source alternative to ChatGPT Agents for browsing [Developer Tools]
46 points, 16 comments
An open-source framework for vision-based LLMs to execute computer tasks like browsing, with OS-level control and high performance.
- True vision-based control (identifies and interacts with on-screen elements)
- Full computer access (handles system dialogues, file uploads, etc.)
- Extensible design (supports custom LLMs and computer providers)
- State-of-the-art performance (72.7% on WebArena benchmark)
Discussion Link, Original Link
An AI agent that learns your product and guides your users [Business]
33 points, 18 comments
AI agent that learns web-based products to guide users, generate docs, and perform actions.
- Automatically explores and understands any web application
- Provides real-time in-product guidance and on-demand tours
- Generates documentation and takes actions via tool-calling SDK
- Integrates with existing help resources and improves with feedback
- Easy setup with minimal code via JavaScript snippet
Discussion Link, Original Link
I use AI to send myself personalized weekly recaps from my saved links [Productivity]
3 points, 0 comments
A minimalist AI-powered bookmarking app that sends personalized weekly recaps of saved links with themes, nudges, and reflective questions.
- Generates weekly summaries highlighting patterns and themes from saved links
- Reminds users of unvisited bookmarks and prompts exploration with reflective questions
- Supports tags, annotations, and diverse content types (not just text)
- Includes a chat feature for contextual link searches (e.g., most-visited travel links)
- Designed as a lightweight, proactive alternative to bloated AI tools
Discussion Link, Original Link
A high-altitude low-power flight computer for high-altitude balloons [Consumer Tech]
33 points, 19 comments
A compact, low-power flight computer for high-altitude balloons with built-in tracking using the Horus Binary v2 protocol.
- Uses Horus Binary v2 for high transmit rates, forward error correction, and weak-signal performance
- Runs on a single AA battery for up to 17 hours
- Supports expansion via headers and Qwiic connector (BME280, ICM-20948 IMU, etc.)
- Features an OLED display for diagnostics
- SAMD21 microcontroller, Si4063 radio module, and ATGM336H GPS module
- Arduino framework for beginner accessibility
- Real-time tracking on Sondehub Amateur
- Lightweight design optimized for high-altitude ballooning
Discussion Link, Original Link
MoebiusXBIN – ASCII and text-mode art editor with custom font support [Design]
45 points, 5 comments
MoebiusXBIN is an ASCII and text-mode art editor that supports custom fonts.
- Supports ASCII and text-mode art creation
- Allows custom font integration
- Designed for artistic text-based editing
Discussion Link, Original Link
OpenAI Agents SDK demos made durable and scalable with Temporal [Developer Tools]
9 points, 1 comments
OpenAI Agents SDK demos enhanced with Temporal for durability and scalability at scale.
- Survives process crashes and scales to millions of parallel executions
- Easy human interactivity integration via Python decorators
- Used by OpenAI for ChatGPT Images and Codex code-writing agent
- Open-source (MIT) and demonstrated in a video with OpenAI
Discussion Link, Original Link
Docucod – Automatic documentation for any codebase [Developer Tools]
4 points, 0 comments
Docucod automatically generates and maintains documentation from any codebase, simplifying onboarding and debugging.
- Analyzes codebases, parsing files, comments, types, and READMEs to build static documentation
- Generates diagrams with Mermaid and plans to add images and videos
- Uses custom static site builder Dory for parsing and HTML generation
- Supports public GitHub repos (private repos coming soon)
- Future features include code search, query-based responses, and CI integration
- Free for public repositories up to 100MB
We create visual codebase maps that scale (static analysis and LLMs) [Developer Tools]
4 points, 0 comments
A tool for visualizing large codebases using static analysis and LLMs to create accurate, scalable diagrams.
- Combines static analysis and LLM agents to generate precise codebase diagrams
- Recursively visualizes code from high-level abstractions to detailed views
- Includes an MCP-server to provide dependency documentation and reduce LLM hallucinations
- Designed to handle large projects like PyTorch
- Aims to improve code understanding as AI-generated code becomes more prevalent
Discussion Link, Original Link
Docmd – Minimal Markdown documentation generator using Node.js [Developer Tools]
3 points, 2 comments
A lightweight CLI tool for converting Markdown files into responsive, themed HTML documentation with minimal setup.
- Lightweight alternative to frameworks like Docusaurus or Mintlify
- Built-in components and plugin support
- Ready for GitHub Pages deployment
- Simple setup for open-source project documentation
Universal Control" for Macintosh Classic [Consumer Tech]
5 points, 0 comments
Control vintage Macintosh from a modern Mac using an Arduino.
- Uses Arduino as a bridge between modern Mac and Apple Desktop Bus
- Enables control of vintage Macintosh systems
- Compatible with Macintosh Classic models
Discussion Link, Original Link
Print the daily weather forecast on a thermal receipt printer [Consumer Tech]
5 points, 1 comments
A Python script that prints the daily weather forecast on a thermal receipt printer.
- Fetches weather data and converts icons for printing
- Outputs in ESC/POS format for direct printing
- Configurable with GPS coordinates and timezone
- Can be automated via cron job
- Works with cheap thermal printers (under $50)
Discussion Link, Original Link
Production-Ready Agents with the OpenAI Agents SDK and Temporal [Developer Tools]
27 points, 0 comments
Production-ready agents built with OpenAI Agents SDK and Temporal.
- Combines OpenAI Agents SDK with Temporal for reliable execution
- Designed for production environments
- Enables scalable and durable agent workflows
Discussion Link, Original Link
Building a Production Finance Model for Open Source [Finance]
9 points, 0 comments
A production finance model for open source that combines Patreon's flexibility with Kickstarter's coordinated funding, focusing on backer empowerment and upstream-downstream value flow.
- Combines accountability of Patreon with coordinated action of Kickstarter thresholds
- Empowers backers to move freely between creators, avoiding platform lock-in
- Targets distressed open-source market to unlock billions in stuck funding
- Full-stack Rust application with Leptos frontend, Axum backend, Postgres, and NATS
- Features Elastic Fund Raising and social decision systems for open communities
- Pre-pay system with refunds and logouts for financial transparency
- Aims to bridge demand for downstream value creation with upstream enabling technologies
Discussion Link, Original Link
Claude Code in the Browser – Webcode.sh [Developer Tools]
9 points, 2 comments
A browser-based terminal for coding with Claude anytime, anywhere.
- Zero-config, instant REPL
- Works on mobile and tablets (Chrome, Safari)
- WASM-powered performance
Discussion Link, Original Link
We built a framework for sending real-time updates to mobile apps [Developer Tools]
4 points, 2 comments
A framework for sending real-time updates to mobile apps.
- Enables real-time updates for mobile applications
- Designed for seamless integration with mobile apps
Discussion Link, Original Link
Made my own app switcher because ⌘-Tab wasn't cutting it [video] [Productivity]
3 points, 0 comments
Dory is a lightweight app switcher that simplifies cycling through applications with intuitive typing or mouse actions.
- Quick app switching via middle mouse button or right Command key
- Search apps by first letter, middle letters, acronyms, or similar names
- Tapping or typing options for flexibility
- Learns and prioritizes frequently used apps
- No setup or additional shortcuts required
- One-time purchase ($3.99) with no subscription