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[Other] Show HN: I Ching simulator with accurate Yarrow Stalk probabilities I built this because I wanted a digital I Ching that honors the original math, rather than just Math.random().<p>Technical detail for the curious:<p>The simulation follows the traditional Yarrow Stalk algorithm (Da Yan). The core of this algorithm relies on modulo-4 arithmetic on the stalks remaining after a random split.<p>To make it physically realistic, I used a Box-Muller transform to simulate the user splitting the stalks with a Gaussian distribution (since humans naturally tend to split near the middle), rather than a uniform random split.<p>I was worried this &#x27;human bias&#x27; might skew the modulo probabilities, so I ran a 1-million-run Monte Carlo simulation to verify.<p>The Result: The remainders [0,1,2,3] still emerged with a near-perfect 25% distribution (deviation &lt; 0.05%).<p>So, the app simulates the physics of human imperfection while preserving the mathematical perfection of the probability distribution (where Old Yin is 1&#x2F;16).<p>Stack: Next.js + Tailwind css<p>Happy to answer any questions about the math or the hexagrams!

[DevOps] Show HN: Stepped Actions – distributed workflow orchestration for Rails Stepped is a Rails engine, extracted out of Envirobly where it powers tasks like application deployment, that involve complex, out-of-the-band tasks like DNS provisioning, retries, waiting for instances to boot, running health checks and all the fun stuff of a highly distributed networked system.

[Monitoring/Observability] Real-time state non-determinism & consensus monitoring apphash.io helps Cosmos SDK chain developers debug app hash mismatches (state non-determinism) by making application state divergence visible. When a mismatch happens, the chain halts, but finding where state diverged usually requires manual RPC diffing and log analysis. apphash.io shows which SDK module produced a different state root and the exact key-value differences inside that module across nodes, turning blind debugging into a concrete, inspectable problem.

[Other] The easiest way to use GitHub Octicons in your Blazor apps BlazorOcticons provides GitHub Octicons as native Blazor components. Instead of copying SVG files or managing icon assets manually, you can reference any icon by name and customize size and color directly in your Blazor code. The library keeps your icons consistent with the Octicons set and makes it easier to work with icons in Blazor projects.

[Other] Web3 and Blockchain Development CoinsQueens helps startups and enterprises transform their Web3 and blockchain ideas into real-world solutions. From smart contracts and decentralized applications to secure blockchain platforms, we build scalable, reliable, and future-ready products designed to drive business growth and long-term success in the digital economy.

[Other] AI tech stack generator for your app idea TechStacker is an AI-powered tool that instantly generates tailored tech stack recommendations for your project. Whether you're building a SaaS, mobile app, or complex system, just describe your idea and get professional architecture recommendations powered by Google's Gemini AI.

[API/SDK] Real-time feature flags for indie hackers & small teams Stop deploying just to change a variable. LiveFlags is a real-time feature flag platform for indie hackers and small teams. Toggle features, update remote config, and control your app instantly—no redeploy needed. ✨ Real-time updates via WebSocket 📦 Simple React SDK: one hook to use flags 🌍 Multi-environment support (dev/staging/prod) 👥 Team collaboration with roles 📝 Full audit logs Free tier available. Built with React, TypeScript & Supabase.

[Database] Show HN: KV and wide-column database with CDN-scale replication

[CLI Tool] Show HN: Interactive Common Lisp: An Enhanced REPL I created this because sometimes I want more than rlwrap but less than emacs. icl aims to hit that middle sweet spot.<p>It&#x27;s a terminal application with context-aware auto-complete, an interactive object inspector, auto-indentation, syntax colouring, persistent history, and much more. It uses sly to communicate with the child lisp process and aims to be compatible with any sly-supporting implementation. I hope others find it useful!

[Other] I created a publishing system for step-by-step coding guides in Typst

[Other] Building an efficient hash table in Java

[Other] I tried Gleam for Advent of Code

[Other] Show HN: UK Butchers Meat Price Tracker Hey all!<p>Long time lurker, thought I would contribute back something to the community (at least the meat eaters in the UK). One thing that&#x27;s been a pain for me to get a good understanding of is what the best price is for online butchers based around the UK. I like high quality meat (including some of the bigger cuts for kamado&#x2F;bbq), and I&#x27;m willing to pay a premium however there isn&#x27;t a single resource that would let me get an overview of what&#x27;s available and price movements over time.<p>For my Xmas meat I didn&#x27;t want to start building out a spreadsheet so I built a price tracker with quite a few convenience features to make it easy to search for certain cuts of meat across commonly mentioned butchers on Reddit and other communities.<p>If you find it useful let me know if there are any features that could help to make it even easier to find the cuts of meat that you&#x27;re looking for!<p>Here&#x27;s the tracker: <a href="https:&#x2F;&#x2F;offer-spider.onrender.com" rel="nofollow">https:&#x2F;&#x2F;offer-spider.onrender.com</a><p>Hosted on Render, built with Nextjs and SQLite. Spidering various custom e-com sites (WooCommerce, Shopify) on a daily basis.<p>My current TODOs: - Search is currently free-text OR. Add AND to allow focussing down a search, and select from facets&#x2F;categories&#x2F;taxonomy - Common search terms to pre-fill - Exposing price over time metrics - Further consolidation of SKUs to an internal taxonomy - More butchers - Expanding to other use cases outside of meat!

[Other] Hacking Google Chrome Source Code: Make Puppeteer work over Redis PubSub

[Other] Chrome DevTools for coding agents

[Other] Free online developer tools Free online developer tools for encoding, formatting, generating, and security tasks All processing is done in your browser - your data never leaves your device

[Testing] Security testing for vibe coded apps Automated security testing for Vibe-coded applications. Identify security vulnerabilities in 2 clicks.

[Other] Remote control your mac from smartphone Put your dev environment in your pocket with PocketCorder. Control your Mac from your iPhone or iPad with low latency and high efficiency. Perfect for developers who need to check processes or run commands anywhere—from bed to a cafe. Features include secure Cloudflare Tunnel access, one-tap command shortcuts, and a focused App Mode. Setup is instant via QR code; no complex VPNs needed. Download the free Mac companion app to get started.

[API/SDK] Stop rebuilding uploaders | ivandt Ivandt is a high-performance data onboarding SDK for modern apps. Embed a native importer (no iframe) to handle messy CSV/Excel entirely in-browser with web workers, schema-based or schema-less + AI type detection, powerful validation and transforms, Smart Fix suggestions, and flat pricing with unlimited imports.

[Other] Free online developer & utility tools Access 50+ free online tools including JSON formatter, JWT decoder, salary calculator, SEO tools, calculators, and more. No sign-up required.