🛠️ All DevTools

[Other] A micro (7kb) Material Design 3 based CSS-only framework A micro (7kb) Material Design 3 (Expressive) based CSS-only framework

[DevOps] Incus – Next-generation system container, application container, and VM manager

[Other] Show HN: RULER – Easily apply RL to any agent Hey HN, Kyle here, one of the co-founders of OpenPipe.<p>Reinforcement learning is one of the best techniques for making agents more reliable, and has been widely adopted by frontier labs. However, adoption in the outside community has been slow because it&#x27;s so hard to implement.<p>One of the biggest challenges when adapting RL to a new task is the need for a task-specific &quot;reward function&quot; (way of measuring success). This is often difficult to define, and requires either high-quality labeled data and&#x2F;or significant domain expertise to generate.<p>RULER is a drop-in reward function that works across different tasks without any of that complexity.<p>It works by showing N trajectories to an LLM judge and asking it to rank them relative to each other. This sidesteps the calibration issues that plague most LLM-as-judge approaches. Combined with GRPO (which only cares about relative scores within groups), it just works (surprisingly well!).<p>We have a full writeup on the blog, including results on 4 production tasks. On all 4 tasks, small Qwen 2.5 models trained with RULER+GRPO beat the best prompted frontier model, despite being significantly smaller and cheaper to run. Surprisingly, they even beat models trained with hand-crafted reward functions on 3&#x2F;4 tasks! <a href="https:&#x2F;&#x2F;openpipe.ai&#x2F;blog&#x2F;ruler">https:&#x2F;&#x2F;openpipe.ai&#x2F;blog&#x2F;ruler</a><p>Repo: <a href="https:&#x2F;&#x2F;github.com&#x2F;OpenPipe&#x2F;ART">https:&#x2F;&#x2F;github.com&#x2F;OpenPipe&#x2F;ART</a>

[Other] Show HN: Vibe Kanban – Kanban board to manage your AI coding agents

[Other] Show HN: NodeLoop – Hub for electronics design knowledge and tools Building a free web toolbox for hardware engineers: harness cable diagram generator, connector pinout tools (M.2, JTAG...), microcontroller serial monitor, and various other small utilities.<p>No sign-up required. Designed from my own needs. Feedback and feature suggestions are welcome.

[Monitoring/Observability] Developer-first error tracking and performance monitoring

[API/SDK] OpenTelemetry Go API and SDK

[Testing] GoogleTest - Google Testing and Mocking Framework

[API/SDK] Instantly create & deploy MCP servers from any API spec MCP Engine is the fastest way to turn any OpenAPI spec into an MCP server that AI agents can actually use. Drop your spec, instantly get a Python repo, run it anywhere, or deploy in one click. 1,400+ MCP servers built so far and counting.

[Other] Copy any webpage's UI with 1 click A browser extension that lets you copy UI component from any webpage and converts it into react + tailwind components so that you can use it in your own projects.

[Other] AI project manager for Cursor Become a 100x Developer with AI-Powered Project Management Todo2 transforms developers into AI-powered project managers who never leave Cursor. Research, plan, and execute entire projects with superhuman productivity through MCP integration.

[API/SDK] Turn natural language into deploy-ready n8n workflows Describe any automation in natural language and get a validated n8n workflow in seconds. Velian plans the steps, builds each node, shows a visual diff when you iterate, then deploys straight to your n8n—no drag-and-drop, no docs diving.

[CLI Tool] Your terminal's AI agent, with any model you want opencode is an open-source AI coding agent built for the terminal. It features a native TUI, multi-session support, and is model-agnostic, letting you use Claude, OpenAI, Google, or even local models.

[Build/Deploy] Deploy your websites and databases in seconds Build, launch, scale and deploy your projects with Pxxl App. Fast, reliable hosting with free tier options for developers. Experience seamless deployment workflows, automatic scaling, and robust infrastructure for web applications of any size.

[Other] Free URL Shortener, Branded Short Links & Analytics CutyURL — Fast, Simple, Powerful URL Shortener 🔗 Key Features: Instantly shorten long links with a single click Create custom short URLs to match your brand Get detailed analytics: track clicks, locations, devices, and more

[API/SDK] News api to search for the latest & historical news A powerful REST News API to search for current and historical articles and get trending news in over 22 languages across 30 countries from 60,000+ sources.

[Other] The engine for human-level search ZeroEntropy provides state-of-the-art retrieval for developers building AI products.

[Other] Use prebuilt AI agents in a click, build AI agents easily APE AI provides ready-to-use AI agents and a visual platform to create custom AI agents and multi-agent systems easily. It automates data analysis, content creation, spreadsheets, presentations, etc.. No setup, no tech expertise needed, no need to handle APIs.

[Other] Show HN: Bedrock – An 8-bit computing system for running programs anywhere Hey everyone, this is my latest project.<p>Bedrock is a lightweight program runtime: programs assemble down to a few kilobytes of bytecode that can run on any computer, console, or handheld. The runtime is tiny, it can be implemented from scratch in a few hours, and the I&#x2F;O devices for accessing the keyboard, screen, networking, etc. can be added on as needed.<p>I designed Bedrock to make it easier to maintain programs as a solo developer. It&#x27;s deeply inspired by Uxn and PICO-8, but it makes significant departures from Uxn to provide more capabilities to programs and to be easier to implement.<p>Let me know if you try it out or have any questions.

[DevOps] Show HN: Pangolin – Open source alternative to Cloudflare Tunnels Pangolin is an open source self-hosted tunneled reverse proxy management server with identity and access control, designed to securely expose private resources through encrypted WireGuard tunnels running in user space.<p>We made Pangolin so you retain full control over your infrastructure while providing a user-friendly and feature-rich solution for managing proxies, authentication, and access, all with a clean and simple dashboard web UI.<p>GitHub: <a href="https:&#x2F;&#x2F;github.com&#x2F;fosrl&#x2F;pangolin">https:&#x2F;&#x2F;github.com&#x2F;fosrl&#x2F;pangolin</a><p>Deployment takes about 5 minutes on a VPS: <a href="https:&#x2F;&#x2F;docs.fossorial.io&#x2F;Getting%20Started&#x2F;quick-install" rel="nofollow">https:&#x2F;&#x2F;docs.fossorial.io&#x2F;Getting%20Started&#x2F;quick-install</a><p>Demo by Lawrence Systems (YouTube): <a href="https:&#x2F;&#x2F;youtu.be&#x2F;g5qOpxhhS7M?si=M1XTWLGLUZW0WzTv&amp;t=723" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;g5qOpxhhS7M?si=M1XTWLGLUZW0WzTv&amp;t=723</a><p>Some use cases:<p><pre><code> - Grant users access to your apps from anywhere using just a web-browser - Proxy behind CGNAT - One application load balancer across multiple clouds and on-premises - Easily expose services on IoT and edge devices for field monitoring - Bring localhost online for easy access </code></pre> A few key features:<p><pre><code> - No port forwarding and hide your public IP for self-hosting - Create proxies to multiple different private networks - OAuth2&#x2F;OIDC identity providers - Role-based access control - Raw TCP and UDP support - Resource-specific pin codes, passwords, email OTP - Self-destructing shareable links - API for automation - WAF with CrowdSec and Geoblocking</code></pre>