Show HN Daily Selection (2025-07-12)
- RULER – Easily apply RL to any agent
- Vibe Kanban – Kanban board to manage your AI coding agents
- An Improvisational Web Server
- Director – Local first, open source MCP Gateway
- NodeLoop – Hub for electronics design knowledge and tools
- TUI personal monthly budget planner
- AI Movie Finder – I created a way to find movies by describing
- Code is all you need – Sherlog MCP
RULER – Easily apply RL to any agent [Developer Tools]
41 points, 9 comments
RULER is a drop-in reward function for reinforcement learning that simplifies implementation by using LLM-based ranking without requiring task-specific calibration.
- Works across different tasks without complex reward function design
- Uses LLM to rank trajectories, avoiding calibration issues
- Combines with GRPO for effective relative scoring
- Outperforms frontier models and hand-crafted reward functions in tests
- Open-source and tested on multiple production tasks
Discussion Link, Original Link
Vibe Kanban – Kanban board to manage your AI coding agents [Productivity]
143 points, 92 comments
Vibe Kanban is an open-source Kanban board designed to manage and parallelize AI coding agents for efficient workflow.
- Enables running multiple coding agents in parallel
- Helps users focus on planning or reviewing while agents work in the background
- Open-sourced and stable for daily use
- Designed to reduce distraction and improve productivity during agent processing
Discussion Link, Original Link
An Improvisational Web Server [Developer Tools]
4 points, 1 comments
An improvisational web server that generates web pages and images on-demand using an LLM (Gemini Flash).
- Dynamically creates content as URLs are requested
- Supports self-hosting with a personal Gemini API key
- Showcases diverse examples like dachshunds, cool cars, and creative concepts
- Cost-effective with remaining Gemini credits after weeks of use
Discussion Link, Original Link
Director – Local first, open source MCP Gateway [Developer Tools]
10 points, 5 comments
Director is an open-source, local-first MCP gateway that simplifies connecting AI tools like Claude, Cursor, or VSCode to MCP servers.
- Open-source and local-first design
- Quick setup (connects in 30 seconds)
- Solves MCP configuration, observability, security, and context window issues
- Plans to add cloud and secure container support via oAuth
- Demo and GitHub repository available for testing and contributions
NodeLoop – Hub for electronics design knowledge and tools [Developer Tools]
5 points, 0 comments
NodeLoop is a free web toolbox for hardware engineers offering various utilities without requiring sign-up.
- Harness cable diagram generator
- Connector pinout tools (M.2, JTAG, etc.)
- Microcontroller serial monitor
- No sign-up required
- Designed based on personal needs
Discussion Link, Original Link
TUI personal monthly budget planner [Finance]
3 points, 0 comments
Simple terminal-based personal budget planner built with Python and Textual for local financial management.
- Terminal user interface (TUI) for budget planning
- Built with Python and Textual framework
- Stores data locally in JSON files for privacy
- Works offline without cloud dependencies
- Designed as a simpler alternative to spreadsheet solutions
Discussion Link, Original Link
AI Movie Finder – I created a way to find movies by describing [Entertainment]
4 points, 2 comments
AI Movie Finder helps users find movies by describing scenes, plots, or moods using natural language processing.
- Uses NLP to understand vague or descriptive queries (e.g., "a sci-fi film with a blue alien opera singer")
- Built with Python and a fine-tuned sentence transformer model for vector embeddings
- Simple, fast frontend in vanilla JavaScript
- Continuously expanding movie database and improving model accuracy
Discussion Link, Original Link
Code is all you need – Sherlog MCP [Developer Tools]
4 points, 0 comments
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