Show HN: Gridl – A daily block puzzle game https://ift.tt/BDi2aVK

Show HN: Gridl – A daily block puzzle game https://gridlgame.com February 23, 2026 at 12:28AM

Show HN: A Vaadin Algebra and Calculus Solver Built with AI Assistance https://ift.tt/6r3RD24

Show HN: A Vaadin Algebra and Calculus Solver Built with AI Assistance Hi HN, I’d like to share a side project that has gradually become my main creative outlet: The Algebrator, a web-based algebra and calculus solver I built using Java, Spring Boot, Vaadin 24, and a symbolic math engine under the hood. It started as a personal attempt to revisit the math I loved in middle/high school, but it evolved into a multi-year design experiment in AI-augmented software engineering. I built and iterated on this app using a paired-programming workflow with LLMs (ChatGPT + GitHub Copilot), and the project ended up teaching me more about agentic AI development than anything else I’ve worked on. What it does Lets users type equations, inequalities, and expressions in a calculator-like UI Solves algebraic equations, systems, trigonometry, calculus operations, and iterative “problem templates” Supports fraction/decimal modes, radians/degrees, comparison operators, user-defined functions, and multi-character variables Includes utility “extras” like prime generation, Fibonacci, random integers, etc. All built in a Vaadin UI designed to feel like a pocket calculator Why I built it I wanted a tool that makes algebra feel like it did on my old TI calculator, but with the flexibility of a symbolic engine. I also wanted to explore how far I could push “AI-paired development” in a real project — not just code generation, but architecture, UI/UX reasoning, and rapid iteration. What might interest HN It’s a full Java/Vaadin project, not JavaScript It demonstrates a real, sustained AI-augmented workflow It blends symbolic math (Symja) with custom arithmetic logic in Java The UI is dynamic: variables appear as buttons as you type them It’s deployed live (Spring Boot on Railway) It’s fully open-source Looking for feedback on: Architecture and code clarity Ideas for additional math features or real-world templates Best practices for symbolic math in a Java environment How to present AI-augmented workflows professionally Repo: [ https://ift.tt/u5WVybq ] Live demo: [ https://ift.tt/TyfMwDQ ] Thanks for taking a look — feedback and critique are welcome. February 22, 2026 at 09:04PM

Show HN: Infinichess – Multiplayer Infinite Chessboard https://ift.tt/gYna9lN

Show HN: Infinichess – Multiplayer Infinite Chessboard Open source, massively multiplayer infinite chessboard, with chat and leaderboards. https://infinichess.io February 21, 2026 at 07:56PM

Show HN: I created a beautiful number animation library for React Native https://ift.tt/3OpXYZv

Show HN: I created a beautiful number animation library for React Native Hi! I've been frustrated with the fact that the beautiful NumberFlow library for web (link) is not available on React Native - a platform that I think is much more animation native than the web is. And there are no alternatives of the same quality available. So I reimplemented it myself, basically from the ground up. Introducing Number Flow React Native. I am aiming for this to be the best number animation library for React Native. - Beautiful animation easing directly inspired by web NumberFlow - Supporting both Native and Skia versions - Full i18n support for locales, things like compact or scientific notations, etc. - TimeFlow component for timers and counters - Custom digit bounding for things like binary - Supporting 37 different numeral systems such as Arabic, Thai, and many others - A dedicated, shared worklet mode for as much FPS as possible perfect for sliders or gestures for example - Built on top of React Native Reanimated v3+ - Also supports web via Expo Web Please check out the docs: https://ift.tt/kEhQpAG And star it on GitHub if you like it: https://ift.tt/DMhbTiK Let me know what you think! https://ift.tt/TtZs7J1 February 20, 2026 at 10:16PM

Show HN: Single HTML opinionated Kanban board https://ift.tt/UY5aIZm

Show HN: Single HTML opinionated Kanban board https://ift.tt/toZ9wNJ February 20, 2026 at 11:34PM

Show HN: An e-ink air traffic monitor built with Cloudflare Workers https://ift.tt/rhA1nc4

Show HN: An e-ink air traffic monitor built with Cloudflare Workers https://ift.tt/PmUnwNf February 20, 2026 at 03:06AM

Show HN: Codedocent – Code visualization for non-programmers https://ift.tt/aKVU9lg

Show HN: Codedocent – Code visualization for non-programmers I'm a hardware engineer who reads schematics, not source code. I kept needing to understand codebases for projects I was managing but couldn't read the syntax. So I built a tool that turns any codebase into an interactive visual map with plain English explanations. Point it at a folder, get nested colored blocks showing the structure (directories → files → classes → functions). Click to drill down. AI generates summaries written for humans, not programmers. Architecture mode shows a dependency graph so you can see how modules connect. Built the whole thing in ~30 hours using a multi-node AI workflow: Claude for planning/decisions, Claude Code for implementation, five other models for adversarial security review (42 fixes across 6 rounds). I made every design decision; AI wrote every line of code. Cloud AI (OpenAI/Groq) or local AI (Ollama) — your choice. pip install codedocent and run the setup wizard. MIT licensed. Would love feedback from people who actually write code — does this help when onboarding onto unfamiliar codebases? https://ift.tt/rpEHqW2 February 20, 2026 at 12:21AM