Show HN: OpenMix, open-source computational framework for formulation science https://ift.tt/CKXhxlN

Show HN: OpenMix, open-source computational framework for formulation science I built OpenMix because computational chemistry has great tools for individual molecules (RDKit, DeepChem) but nothing for mixtures. pip install openmix. Apache 2.0. Technical blog: https://ift.tt/3Fz9A04... https://ift.tt/PvsrY3Q April 9, 2026 at 12:12AM

Show HN: I built a navigation app that displays weather along the route https://ift.tt/0BAhb6P

Show HN: I built a navigation app that displays weather along the route Hello HN, I live in northern part of USA where winters are snowy. Whenever I took long trips, I always wondered what the weather along the route is going to be. For those who live in northern USA, you know weather can change frequently, so when you're traveling matters a lot, not just the route. To solve this problem for myself, I built https://navimodo.com/ . NaviModo calculates the route, and then checks weather along the route based on your start time, and displays weather along the route. Change start time, and the whole thing is recalculated. I am not expecting any commercialization for this, just wanted to scratch an itch, and just did it. I have ideas for adding additional features (suggestions for when to take breaks based on bad weather, auto-suggestion of start time to avoid bad weather, etc.,) but will add more as time goes by. Any feedback is welcome! https://navimodo.com/ April 6, 2026 at 08:58PM

Show HN: A reasoning hierarchical robotics pipeline you can run in the browser https://ift.tt/MIjEcqW

Show HN: A reasoning hierarchical robotics pipeline you can run in the browser This demo combines the flexible task programming and reasoning of Gemini ER (what is the scene, and what should I do?) and classical camera calibration, kinematics, motion controllers. Each layer is independently swappable, and the AI model doesn't need to know anything about the robot's embodiment. This recreates the modularity of a Sense-Plan-Act architecture while retaining the semantic reasoning of a foundation AI model. A writeup explaining the tradeoffs is linked from the page https://ift.tt/hXN82lY . https://avikde.github.io/vla-pipeline/ April 8, 2026 at 12:35AM

Show HN: Finalrun – Spec-driven testing using English and vision for mobile apps https://ift.tt/TQ4ojar

Show HN: Finalrun – Spec-driven testing using English and vision for mobile apps I wanted to test mobile apps in plain English instead of relying on brittle selectors like XPath or accessibility IDs. With a vision-based agent, that part actually works well. It can look at the screen, understand intent, and perform actions across Android and iOS. The bigger problem showed up around how tests are defined and maintained. When test flows are kept outside the codebase (written manually or generated from PRDs), they quickly go out of sync with the app. Keeping them updated becomes a lot of effort, and they lose reliability over time. I then tried generating tests directly from the codebase (via MCP). That improved sync, but introduced high token usage and slower generation. The shift for me was realizing test generation shouldn’t be a one-off step. Tests need to live alongside the codebase so they stay in sync and have more context. I kept the execution vision-based (no brittle selectors), but moved test generation closer to the repo. I’ve open sourced the core pieces: 1. generate tests from codebase context 2. YAML-based test flows 3. Vision-based execution across Android and iOS Repo: https://ift.tt/dVnrNTt Demo: https://youtu.be/rJCw3p0PHr4 In the Demo video, you’ll see the "post-development hand-off." An AI builds a feature in an IDE, and Finalrun immediately generates and executes a vision-based test for it verifying the feature developed by AI. https://ift.tt/dVnrNTt April 7, 2026 at 09:33PM

Show HN: MCP 2000 – Browser-based drum machine with AI-generated sounds https://ift.tt/JcvKdPm

Show HN: MCP 2000 – Browser-based drum machine with AI-generated sounds https://ift.tt/tgqfdoM April 6, 2026 at 10:35PM

Show HN: A Dad Joke Website https://ift.tt/AtzsOpd

Show HN: A Dad Joke Website A dad joke website where you can rate random dad jokes, 1-5 groans. Sourced from 4 different places, all cited, all categorized, and ranked by top voted. Help me create the worlds best dadabase! https://joshkurz.net/ April 6, 2026 at 12:54AM

Show HN: Gecit – DPI bypass using eBPF sock_ops, no proxy or VPN https://ift.tt/hB3Q1YR

Show HN: Gecit – DPI bypass using eBPF sock_ops, no proxy or VPN https://ift.tt/Yr5ZBVf April 5, 2026 at 11:15PM

Show HN: A Common Lisp implementation in development https://ift.tt/TuxRvmV

Show HN: A Common Lisp implementation in development https://ift.tt/xrXknLR April 5, 2026 at 09:56PM

Show HN: Crabby – Claude Code skill that reviews code like the Rust compiler https://ift.tt/wLd9Z63

Show HN: Crabby – Claude Code skill that reviews code like the Rust compiler I built a Claude Code skill called crabby that makes Claude output diagnostics in rustc error format - severity codes, location arrows, causation spans, and a paste-able fix every time. The twist: Claude becomes Ferris the crab, grumpy and unimpressed, but technically precise. The format works for code review, writing review, architecture, strategy - anything you submit. The "writing review" example tends to surprise people: it flags passive voice in a postmortem with the exact same error[W002] format as a SQL injection. https://ift.tt/vTjqfa1 April 5, 2026 at 08:35PM

Show HN: Kaoslabs – High-intensity AI video and visual experiments https://ift.tt/MHTX1UJ

Show HN: Kaoslabs – High-intensity AI video and visual experiments "I've been building a sandbox on a Linux VPS to push AI video generation and visualization to the extreme. It's a mix of experimental generative art and high-intensity visuals. Built with Python, running on Debian. Check it out and let me know what you think!" https://kaoslabs.org April 4, 2026 at 11:54PM

Show HN: DocMason – Agent Knowledge Base for local complex office files https://ift.tt/Xv0cLY7

Show HN: DocMason – Agent Knowledge Base for local complex office files I think everyone has already read Karpathy's Post about LLM Knowledge Bases. Actually for recent weeks I am already working on agent-native knowledge base for complex research (DocMason). And it is purely running in Codex/Claude Code. I call this paradigm is: The repo is the app. Codex is the runtime. During my daily working life, I have tons of office documents with knowledge from all teams, and as an IT Architect, I need to combine them altogether to handle complex deep research (which normal LLM definitely could not help). That is the originally reason I built DocMason, and I am using it in everyday which support me on lots of complex topics. I have already open-sourced this repo. And I think it takes Karpathy's concept a step further for real-world usage in three ways: 1. It could handle most kinds of office docs (pptx, docx, excels, even .eml). And really extract multimodal information from all IT architecture diagram or excel sheets. 2. It is running as a Real APP but not a naive RAG tool. DocMason could run smoothly and intelligently to prepare environment, auto update, and auto incrementally sync Knowledge base. 3. Most importantly it is running in Native AI Agents, which could leverage powerful AI Agents engine (e.g. Codex or Claude Code) View detail architecture diagram in DocMason Readme, and then download have a try :) You will find it could help a lot during daily work. Would love to hear your feedback and issues in Github! https://ift.tt/r8RkiAE April 4, 2026 at 11:49PM

Show HN: A game where you build a GPU https://ift.tt/en2IUtT

Show HN: A game where you build a GPU Thought the resources for GPU arch were lacking, so here we are https://ift.tt/jU87FJu April 4, 2026 at 11:45PM

Show HN: DocMason – AI Agent Knowledge Base for local complex office files https://ift.tt/v8PLpEd

Show HN: DocMason – AI Agent Knowledge Base for local complex office files https://ift.tt/ljatOG5 April 4, 2026 at 11:41PM