🛠️ All DevTools

[Other] Pixi: Reproducible Package Management for Robotics

[CLI Tool] Show HN: The System Skill Pattern Hello HN!<p>I’ve been playing with Claude Skills and stumbled on a simple pattern for tiny, durable personal data systems:<p>* CLI: a small, self-contained executable<p>* SKILL.md: the operator guide (what to run, how to parse output, how to think about the system)<p>* SQLite: a local DB for persistent state<p>It’s nothing mind-blowing, but the ergonomics of this combo feel great.<p>If you define a process&#x2F;flow, Claude can &quot;turn the crank&quot; by running the CLI, accumulating context, and animating the system to life over time.<p>They’re also easy to share: you can distribute System Skills via Claude Code’s `&#x2F;plugin marketplace add &lt;repo&gt;`.<p>More details in the blog post and the toy Pomodoro System Skill reference implementation here:<p>Blog: <a href="https:&#x2F;&#x2F;www.shruggingface.com&#x2F;blog&#x2F;the-system-skill-pattern" rel="nofollow">https:&#x2F;&#x2F;www.shruggingface.com&#x2F;blog&#x2F;the-system-skill-pattern</a><p>Repo: <a href="https:&#x2F;&#x2F;github.com&#x2F;jakedahn&#x2F;pomodoro" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;jakedahn&#x2F;pomodoro</a><p>--<p>Curious whether any of this resonates. Also excited to hear any interesting System Skill ideas worth exploring!

[Other] Show HN: I built an 8-bit CPU simulator in Python from scratch I built a tiny 8-bit CPU simulator in Python to better understand how computers work at a low level. It visualizes registers, memory, and instructions in real-time, so you can actually see each operation as it happens. You can write simple assembly code and watch how the CPU executes it step by step.<p>The project is mainly for learning and experimentation, but I’d love feedback or ideas for improvement.

[Other] Show HN: Run a GitHub Actions step in a gVisor sandbox

[Other] Show HN: A fast, privacy-first image converter that runs in browser Hey HN<p>I built ImageConverter.dev because I got tired of “free” image converter sites that force uploads, or throttle conversions.<p>So I made a tool that runs 100% client-side — meaning your images never leave your device. It’s built for speed, simplicity, and privacy.<p>What it does<p>Convert images between JPG, PNG, WebP<p>Works offline once loaded (PWA support)<p>How it works<p>It uses the Canvas API and WebAssembly to handle conversions directly in the browser. There’s no upload, no tracking, no server costs, and it’s fast even on mid-range devices.<p>Why I built it<p>I wanted an instant, no-ads, privacy-safe way to handle images for my personal projects — something lightweight enough to replace desktop tools.<p>Try it<p><a href="https:&#x2F;&#x2F;imageconverter.dev" rel="nofollow">https:&#x2F;&#x2F;imageconverter.dev</a><p>Would love feedback from the community — especially on:<p>Performance on different browsers&#x2F;devices<p>Thanks for reading!

[DevOps] SeaweedFS is a fast distributed storage system for blobs, objects, files, and data lake, for billions of files! Blob store has O(1) disk seek, cloud tiering. Filer supports Cloud Drive, xDC replication, Kubernetes, POSIX FUSE mount, S3 API, S3 Gateway, Hadoop, WebDAV, encryption, Erasure Coding. Enterprise version is at seaweedfs.com.

[Other] NVIDIA Isaac Sim™ is an open-source application on NVIDIA Omniverse for developing, simulating, and testing AI-driven robots in realistic virtual environments.

[Other] ChunkLLM: A Lightweight Pluggable Framework for Accelerating LLMs Inference

[Other] Show HN: Inspec – Specification scheduling software for interior designers Hi HN, I&#x27;m Nick and I built Inspec with my partner Caitlin (she&#x27;s the interior designer, I&#x27;m the developer).<p>Inspec lets interior designers create and manage FF&amp;E schedules - basically spec sheets listing everything that goes in a room before the furniture: flooring, paint, countertops, lighting, fixtures, etc.<p>This process is currently exclusively done using Excel, and while this works to some degree, it comes with a lot of manual work and clunkiness. When Caitlin started working remotely, I watched her deal with these issues daily. So I spent the past 9 months building a better solution.<p>Key Features:<p>- Realtime collaboration<p>- Revision control (versioning)<p>- Professional PDF exports<p>- QR codes to print out on-site for contractors, builders etc. to always have the latest version<p>- Completely customisable fields and a familiar workflow to Excel to keep learning curve small<p>When we first started building this we thought it was completely unique, but turns out there are 2 competitors. I think our positioning is quite different though as we seek to only replace this document creation, rather than overhaul the entire project management and try to be a complete solution. So that’s helped to guide our focus, but also validated that interior designers are looking to modernise their software.<p>Tech stack:<p>I used my SaaS boilerplate which is just a modified T3 stack template with everything set up just how I like it. So Next.js with the pages router, TS, Trpc, Prisma + PostgreSQL, and TailwindCSS. I’ve also got Pusher for realtime collaboration, Redis and BullMQ for keeping a seperate background worker for PDF and web scraping jobs.<p>I can’t imagine many interior designers are on HN, but figured I would share this for anyone who wants to take a look :) feedback always welcome! The landing page is at <a href="https:&#x2F;&#x2F;inspec.design" rel="nofollow">https:&#x2F;&#x2F;inspec.design</a>

[API/SDK] Bridges frontend & backend with smart API contracts Developers waste days syncing API contracts between frontend and backend teams. Middlerok solves this by generating production-ready OpenAPI specs, backend stubs, frontend clients, and docs — all from requirements or screenshots.

[Other] Introduction of noLimit Enterprise-grade language models with complete freedom. No guardrails, no restrictions. Reliable, uncensored intelligence for developers and enterprises.

[Other] Free Lovable with Unlimited tokens Faster App AI generates modern websites and apps for you, no code, just conversation. Minimalist design, smooth experience, direct integration with GitHub, Supabase, and Netlify. Focus on what matters, we handle the rest.

[Other] SwiftUI components library for iOS and macOS AppLayoutsUI is an extensive SwiftUI components library designed to help you build a perfect user-interface for your iOS and macOS app in no time at all. It offers countless of reusable SwiftUI components, sections, and screens.

[Other] Prompt to production app, in Pure Python Reflex is an AI app builder that lets you create production-ready web apps entirely in Python, powered by its own open-source framework. Just connect your data and enter a prompt—it builds full-stack apps that work with any data source, API, or Python package.

[Other] Document, Design, Run Code, Test API — All in One Workspace DevScribe is a next-gen productivity tool for developers, architects, and tech writers. It unifies docs, code, and design in one offline workspace—helping you focus and build faster. Your data stays 100% safe and stored only on your system.

[API/SDK] Show HN: Open-source TypeScript SDK for sending and operating iMessages

[Other] Show HN: FlowLens – MCP server for debugging with Claude Code Hi HN,<p>We often run into this with coding agents like Claude Code: debugging turns into copy-pasting logs, writing long explanations, and sharing screenshots.<p>FlowLens is an MCP server plus a Chrome extension that captures browser context (video, console, network, user actions, storage) and makes it available to MCP-compatible agents like Claude Code.<p>You can try it here: <a href="https:&#x2F;&#x2F;magentic.ai&#x2F;flowlens" rel="nofollow">https:&#x2F;&#x2F;magentic.ai&#x2F;flowlens</a><p>Any feedback—good, bad, or brutal—is welcome.

[Other] /dev/null is an ACID compliant database

[Other] Show HN: OpenSnowcat – A fork of Snowplow to keep open analytics alive I’ve been a long-time Snowplow user and unofficial evangelizer. I have deep respect for its founders, Alex and Yali, who I met a few times.<p>What made me fall in love with Snowplow was that it was unopinionated, gave access to raw event data, and was truly open source. Back in 2013, that changed everything for me. I couldn’t look at GA the same way again.<p>Over the years, analytics moved into SQL warehouses driven by cheaper CPU&#x2F;storage, dbt, reproducibility, and transparency. I saw the need for a democratized Snowplow pipeline and launched a hosted version in 2019.<p>In January 2024, Snowplow changed its license (SLULA), effectively ending open-source Snowplow by restricting production use. When that happened, I realized the spirit of open data and open architecture was gone.<p>A week later, I forked it, I wanted to keep the idea alive.<p>OpenSnowcat keeps the original collector and enricher under Apache 2.0 and stays fully compatible with existing Snowplow pipelines. We maintain it with regular patches, performance optimizations, and integrations with modern tools like Warpstream Bento for event processing&#x2F;routing.<p>The goal is simple: keep open analytics open.<p>Would love to hear how others in the community think we can preserve openness in data infrastructure as “open source” becomes increasingly commercialized.<p>That&#x27;s it, I should have posted here earlier but now felt right.

[Other] Show HN: I built a tech news aggregator that works the way my brain does An honest to god, non-algorithmic reverse chrono list of tech news that passes my signal-to-noise tests, updated hourly.<p>A lightweight a page design as I&#x27;ve been able to keep; simple, clean, fast. No commercial features or aspirations - this is a passion project, something I&#x27;ve been fooling around with on and off for decades.<p>There&#x27;s a &quot;Top&quot; view too with an LLM edited front page &amp; summary, and categorized views for a large number of topics - see the Directory. A few more buried features to explore, but the fundamental use case is pop in, scan, exit - fast and concise.<p>Your feedback would be appreciated!